This file is indexed.

/usr/sbin/spamd is in spamassassin 3.4.2-0ubuntu0.14.04.1.

This file is owned by root:root, with mode 0o755.

The actual contents of the file can be viewed below.

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
3221
3222
3223
3224
3225
3226
3227
3228
3229
3230
3231
3232
3233
3234
3235
3236
3237
3238
3239
3240
3241
3242
3243
3244
3245
3246
3247
3248
3249
3250
3251
3252
3253
3254
3255
3256
3257
3258
3259
3260
3261
3262
3263
3264
3265
3266
3267
3268
3269
3270
3271
3272
3273
3274
3275
3276
3277
3278
3279
3280
3281
3282
3283
3284
3285
3286
3287
3288
3289
3290
3291
3292
3293
3294
3295
3296
3297
3298
3299
3300
3301
3302
3303
3304
3305
3306
3307
3308
3309
3310
3311
3312
3313
3314
3315
3316
3317
3318
3319
3320
3321
3322
3323
3324
3325
3326
3327
3328
3329
3330
3331
3332
3333
3334
3335
3336
3337
3338
3339
3340
3341
3342
3343
3344
3345
3346
3347
3348
3349
3350
3351
3352
3353
3354
3355
3356
3357
3358
3359
3360
3361
3362
3363
3364
3365
3366
3367
3368
3369
3370
3371
3372
3373
3374
3375
3376
3377
3378
3379
3380
3381
3382
3383
3384
3385
3386
3387
3388
3389
3390
3391
3392
3393
3394
3395
3396
3397
3398
3399
3400
3401
3402
3403
3404
3405
3406
3407
3408
3409
3410
3411
3412
3413
3414
3415
3416
3417
3418
3419
3420
3421
3422
3423
3424
3425
3426
3427
3428
3429
3430
3431
3432
3433
3434
3435
3436
3437
3438
3439
3440
3441
3442
3443
3444
3445
3446
3447
3448
3449
3450
3451
3452
3453
3454
3455
3456
3457
3458
3459
3460
3461
3462
3463
3464
3465
3466
3467
3468
3469
3470
3471
3472
3473
3474
3475
3476
3477
3478
3479
3480
3481
3482
3483
3484
3485
3486
3487
3488
3489
3490
3491
3492
3493
3494
3495
3496
3497
3498
3499
3500
3501
3502
3503
3504
3505
3506
3507
3508
3509
3510
3511
3512
3513
3514
3515
3516
3517
3518
3519
3520
3521
3522
3523
3524
3525
3526
3527
3528
3529
3530
3531
3532
3533
3534
3535
3536
3537
3538
3539
3540
3541
3542
3543
3544
3545
3546
3547
3548
3549
3550
3551
3552
3553
3554
3555
3556
3557
3558
3559
3560
3561
3562
3563
3564
3565
3566
3567
3568
3569
3570
3571
3572
3573
3574
3575
3576
3577
3578
3579
3580
3581
3582
3583
3584
3585
3586
3587
3588
3589
3590
3591
3592
3593
3594
3595
3596
3597
3598
3599
3600
3601
3602
3603
3604
3605
3606
3607
3608
3609
3610
3611
3612
3613
3614
3615
3616
3617
3618
3619
3620
3621
3622
3623
3624
3625
3626
3627
3628
3629
3630
3631
3632
3633
3634
3635
3636
3637
3638
3639
3640
3641
3642
3643
3644
3645
3646
3647
3648
3649
3650
3651
3652
3653
3654
3655
3656
3657
3658
3659
3660
3661
3662
3663
3664
3665
3666
3667
3668
3669
3670
3671
3672
3673
3674
3675
3676
3677
3678
3679
3680
3681
3682
3683
3684
3685
3686
3687
3688
3689
3690
3691
3692
3693
3694
3695
3696
3697
3698
3699
3700
3701
3702
3703
3704
3705
3706
3707
3708
3709
3710
3711
3712
3713
3714
3715
3716
3717
3718
3719
3720
3721
3722
3723
3724
3725
3726
3727
3728
3729
3730
3731
3732
3733
3734
3735
3736
3737
3738
3739
3740
3741
3742
3743
3744
3745
3746
3747
3748
3749
3750
3751
3752
3753
3754
3755
3756
3757
3758
3759
3760
3761
3762
3763
3764
3765
3766
3767
3768
3769
3770
3771
3772
3773
3774
3775
3776
3777
3778
3779
3780
3781
3782
3783
3784
3785
3786
3787
3788
3789
3790
3791
3792
3793
3794
3795
3796
3797
3798
3799
3800
3801
3802
3803
3804
3805
3806
3807
3808
3809
3810
3811
3812
3813
3814
3815
3816
3817
3818
3819
3820
3821
3822
3823
3824
3825
3826
3827
3828
3829
3830
3831
3832
3833
3834
3835
3836
3837
3838
3839
3840
3841
#!/usr/bin/perl -T -w

eval 'exec /usr/bin/perl -T -w -S $0 ${1+"$@"}'
    if 0; # not running under some shell
# <@LICENSE>
# Licensed to the Apache Software Foundation (ASF) under one or more
# contributor license agreements.  See the NOTICE file distributed with
# this work for additional information regarding copyright ownership.
# The ASF licenses this file to you under the Apache License, Version 2.0
# (the "License"); you may not use this file except in compliance with
# the License.  You may obtain a copy of the License at:
# 
#     http://www.apache.org/licenses/LICENSE-2.0
# 
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
# </@LICENSE>

#IMPORTANT: The order of -T -w above is important for spamd_hup.t on Solaris 10 - changed per bug 6883

use strict;
use warnings;
use re 'taint';

my $PREFIX          = '/usr';             # substituted at 'make' time
my $DEF_RULES_DIR   = '/usr/share/spamassassin';      # substituted at 'make' time
my $LOCAL_RULES_DIR = '/etc/spamassassin';    # substituted at 'make' time
my $LOCAL_STATE_DIR = '/var/lib/spamassassin';    # substituted at 'make' time
use lib '/usr/share/perl5';                   # substituted at 'make' time

# added by jm for use inside the distro
# This is disabled during the "make install" process.
BEGIN {
}

our ($have_getaddrinfo_in_core, $have_getaddrinfo_legacy, $io_socket_module_name,
     $have_inet4, $have_inet6, $ai_addrconfig_flag);

# don't force requirement on IO::Socket::IP or IO::Socket::INET6
BEGIN {
  $have_getaddrinfo_in_core = eval {
    # The Socket module (1.94) bundled with Perl 5.14.* provides
    # new affordances for IPv6, including implementations of the
    # Socket::getaddrinfo() and Socket::getnameinfo() functions,
    # along with related constants and a handful of new functions.
    # Perl 5.16.0 upgrades the core Socket module to version 2.001.
  # Socket->VERSION(1.94);  # provides getaddrinfo() and getnameinfo()
  # Socket->VERSION(1.95);  # provides AI_ADDRCONFIG
    Socket->VERSION(1.96);  # provides NIx_NOSERV, and Exporter tag :addrinfo
  # Socket->VERSION(1.97);  # IO::Socket::IP depends on Socket 1.97
    import Socket qw(/^(?:AI|NI|NIx|EAI)_/);

    # AUTOLOADing 'constants' here enables inlining - see Exporter man page
    &AI_ADDRCONFIG; &AI_PASSIVE;
    &NI_NUMERICHOST, &NI_NUMERICSERV; &NIx_NOSERV; 1;
  };

  $have_getaddrinfo_legacy = !$have_getaddrinfo_in_core && eval {
    require Socket6;
  # Socket6->VERSION(0.13);  # provides NI_NAMEREQD
    Socket6->VERSION(0.18);  # provides AI_NUMERICSERV
    import Socket6 qw(/^(?:AI|NI|NIx|EAI)_/);
    &AI_ADDRCONFIG; &AI_PASSIVE;  # enable inlining
    &NI_NUMERICHOST; &NI_NUMERICSERV; &NI_NAMEREQD; 1;
  };

  require Socket;
  import Socket qw(:DEFAULT IPPROTO_TCP);

  &SOCK_STREAM; &IPPROTO_TCP; &SOMAXCONN; # enable inlining

  &AF_UNSPEC; &AF_INET; &AF_INET6;  # enable inlining

  $ai_addrconfig_flag = 0;

  if ($have_getaddrinfo_in_core) {
    # using a modern Socket module

    eval {  # does the operating system recognize an AI_ADDRCONFIG flag?
      if (&AI_ADDRCONFIG && &EAI_BADFLAGS) {
        my($err, @res) = Socket::getaddrinfo("localhost", 0,
                           { family => &AF_UNSPEC, flags => &AI_ADDRCONFIG });
        $ai_addrconfig_flag = &AI_ADDRCONFIG if !$err || $err != &EAI_BADFLAGS;
      }
    };

    *ip_or_name_to_ip_addresses = sub {
      my($addr, $ai_family) = @_;
      # Socket::getaddrinfo returns a list of hashrefs
      my($error, @res) =
        Socket::getaddrinfo($addr, 0,
          { family => $ai_family, flags => $ai_addrconfig_flag | &AI_PASSIVE, 
            socktype => &SOCK_STREAM, protocol => &IPPROTO_TCP });
      my(@ip_addrs);
      if (!$error) {
        for my $a (@res) {
          my($err, $ip_addr) =
            Socket::getnameinfo($a->{addr},
                                &NI_NUMERICHOST | &NI_NUMERICSERV, &NIx_NOSERV);
          if (!$err) { push(@ip_addrs, $ip_addr) }
          elsif (!$error) { $error = $err }
        }
      }
      return ($error, @ip_addrs);
    };

    *peer_info_from_socket = sub {
      my $sock = shift;
      my $peer_addr = $sock->peerhost;  # textual representation of an IP addr
      $peer_addr or return;
      my $peer_hostname;
      if ($sock->UNIVERSAL::can('peerhostname')) {
        $peer_hostname = $sock->peerhostname;  # provided by IO::Socket::IP
      } else {
        my($err, $host) = Socket::getnameinfo($sock->peername,
                                              &NI_NAMEREQD, &NIx_NOSERV);
        $peer_hostname = $host  if !$err;
      }
      return ($sock->peerport, $peer_addr, $peer_hostname||$peer_addr,
              $sock->sockport);
    };

  } elsif ($have_getaddrinfo_legacy) {
    # using a legacy Socket6 module; somewhat different API on getaddrinfo()
    # and getnameinfo() compared to these functions in a module Socket

    eval {  # does the operating system recognize an AI_ADDRCONFIG flag?
      if (&AI_ADDRCONFIG && &EAI_BADFLAGS) {
        my @res = Socket6::getaddrinfo("localhost", "", 0, &SOCK_STREAM,
                                       &IPPROTO_TCP, &AI_ADDRCONFIG);
        my $err = @res >= 5 ? 0 : $res[0];
        $ai_addrconfig_flag = &AI_ADDRCONFIG if !$err || $err != &EAI_BADFLAGS;
      }
    };

    *ip_or_name_to_ip_addresses = sub {
      my($addr, $ai_family) = @_;
      # Socket6::getaddrinfo returns a list of quintuples
      my @res = Socket6::getaddrinfo($addr, '',
                                     $ai_family, &SOCK_STREAM, &IPPROTO_TCP,
                                     $ai_addrconfig_flag | &AI_PASSIVE);
      my($error, @ip_addrs);
      if (@res < 5) {
        $error = $res[0];
      } else {
        my($family, $socktype, $proto, $saddr, $canonname);
        while (@res >= 5) {
          ($family, $socktype, $proto, $saddr, $canonname, @res) = @res;
          my(@resinfo) =
            Socket6::getnameinfo($saddr, &NI_NUMERICHOST | &NI_NUMERICSERV);
          if (@resinfo >= 2) { push(@ip_addrs, $resinfo[0]) }
          elsif (!$error) { $error = $resinfo[0] }
        }
      }
      return ($error, @ip_addrs);
    };

    *peer_info_from_socket = sub {
      my $sock = shift;
      my $peer_addr = $sock->peerhost;
      $peer_addr or return;
      my @resinfo = (Socket6::getnameinfo($sock->peername, &NI_NAMEREQD))[0];
      my $peer_hostname = @resinfo > 1 ? $resinfo[0] : undef;
      return ($sock->peerport, $peer_addr, $peer_hostname||$peer_addr,
              $sock->sockport);
    };

  } else {  # IPv4 only, no getaddrinfo() available

    *ip_or_name_to_ip_addresses = sub {
      my($addr, $ai_family) = @_;
      $ai_family == &AF_UNSPEC || $ai_family == &AF_INET
        or die "Protocol family $ai_family not supported on this platform";
      my($error, @ip_addrs, @binaddr);
      $! = 0; my @res = gethostbyname($addr);
      if (!@res) {
        $error = "no results from gethostbyname $!";
      } else {
        my($name,$aliases,$addrtype,$length);
        ($name,$aliases,$addrtype,$length,@binaddr) = @res;
      }
      if (!@binaddr) {
        $error = "no such host";
      } else {
        for (@binaddr) {
          my $ip_addr = Socket::inet_ntoa($_);
          push(@ip_addrs, $ip_addr)  if $ip_addr;
        }
      }
      return ($error, @ip_addrs);
    };

    *peer_info_from_socket = sub {
      my $sock = shift;
      my ($peer_port, $in_addr) = Socket::sockaddr_in($sock->peername)
        or return;
      my $peer_addr = Socket::inet_ntoa($in_addr) or return;
      my $peer_hostname = gethostbyaddr($in_addr, &AF_INET);
      return ($peer_port, $peer_addr, $peer_hostname||$peer_addr,
              $sock->sockport);
    };

  }

  if (eval { require IO::Socket::IP }) {  # handles IPv6 and IPv4
    IO::Socket::IP->VERSION(0.09);  # implements IPV6_V6ONLY
    $io_socket_module_name = 'IO::Socket::IP';

  } elsif (eval { require IO::Socket::INET6 }) {  # handles IPv6 and IPv4
    $io_socket_module_name = 'IO::Socket::INET6';

  } elsif (eval { require IO::Socket::INET }) {  # IPv4 only
    $io_socket_module_name = 'IO::Socket::INET';
  }

  $have_inet4 =  # can we create a PF_INET socket?
    defined $io_socket_module_name && eval {  
      my $sock =
        $io_socket_module_name->new(LocalAddr => '0.0.0.0', Proto => 'tcp');
      $sock->close or die "error closing socket: $!"  if $sock;
      $sock ? 1 : undef;
    };

  $have_inet6 =  # can we create a PF_INET6 socket?
    defined $io_socket_module_name &&
    $io_socket_module_name ne 'IO::Socket::INET' &&
    eval {
      my $sock =
        $io_socket_module_name->new(LocalAddr => '::', Proto => 'tcp');
      $sock->close or die "error closing socket: $!"  if $sock;
      $sock ? 1 : undef;
    };

}

use IO::Handle;
use IO::Pipe;
use IO::File ();

use Mail::SpamAssassin;
use Mail::SpamAssassin::NetSet;
use Mail::SpamAssassin::SubProcBackChannel;
use Mail::SpamAssassin::SpamdForkScaling qw(:pfstates);
use Mail::SpamAssassin::Logger qw(:DEFAULT log_message);
use Mail::SpamAssassin::Util qw(untaint_var untaint_file_path secure_tmpdir
                                exit_status_str am_running_on_windows
                                get_user_groups);
use Mail::SpamAssassin::Timeout;

use Getopt::Long;
use POSIX qw(:sys_wait_h);
use POSIX qw(locale_h setsid sigprocmask _exit);
use Errno;
use Fcntl qw(:flock);

use Cwd ();
use File::Spec 0.8;
use File::Path;
use Carp ();
use Time::HiRes qw(time);

use constant RUNNING_ON_MACOS => ($^O =~ /^darwin/oi);

# Check to make sure the script version and the module version matches.
# If not, die here!  Also, deal with unchanged VERSION macro.
if ($Mail::SpamAssassin::VERSION ne '3.004002' && '3.004002' ne "\@\@VERSION\@\@") {
  die 'spamd: spamd script is v3.004002, but using modules v'.$Mail::SpamAssassin::VERSION."\n";
}

# Bug 3062: SpamAssassin should be "locale safe"
POSIX::setlocale(LC_TIME,'C');

my %resphash = (
  EX_OK          => 0,     # no problems
  EX_USAGE       => 64,    # command line usage error
  EX_DATAERR     => 65,    # data format error
  EX_NOINPUT     => 66,    # cannot open input
  EX_NOUSER      => 67,    # addressee unknown
  EX_NOHOST      => 68,    # host name unknown
  EX_UNAVAILABLE => 69,    # service unavailable
  EX_SOFTWARE    => 70,    # internal software error
  EX_OSERR       => 71,    # system error (e.g., can't fork)
  EX_OSFILE      => 72,    # critical OS file missing
  EX_CANTCREAT   => 73,    # can't create (user) output file
  EX_IOERR       => 74,    # input/output error
  EX_TEMPFAIL    => 75,    # temp failure; user is invited to retry
  EX_PROTOCOL    => 76,    # remote error in protocol
  EX_NOPERM      => 77,    # permission denied
  EX_CONFIG      => 78,    # configuration error
  EX_TIMEOUT     => 79,    # read timeout
);

sub print_version {
  printf("SpamAssassin Server version %s\n", Mail::SpamAssassin::Version());
  printf("  running on Perl %s\n",
         join(".", map( 0+($_||0), ($] =~ /(\d)\.(\d{3})(\d{3})?/) )));
  eval { require IO::Socket::SSL; };
  printf("  with SSL support (%s %s)\n", "IO::Socket::SSL", $IO::Socket::SSL::VERSION) unless ($@);
  eval { require Compress::Zlib; };
  printf("  with zlib support (%s %s)\n", "Compress::Zlib", $Compress::Zlib::VERSION) unless ($@);
}

sub print_usage_and_exit {
  my ( $message, $respnam ) = (@_);
  $respnam ||= 'EX_USAGE';

  if ($respnam eq 'EX_OK' ) {
    print_version();
    print("\n");
  }

  require Pod::Usage;
  import Pod::Usage;
  pod2usage(
    -verbose => 0,
    -message => $message,
    -exitval => $resphash{$respnam},
  );
}

# defaults
my %opt = (
  'user-config'   => 1,
  'ident-timeout' => 5.0,
  # scaling settings; some of these aren't actually settable via cmdline
  'server-scale-period' => 2,   # how often to scale the # of kids, secs
  'min-children'  => 1,         # min kids to have running
  'min-spare'     => 1,         # min kids that must be spare
  'max-spare'     => 2,         # max kids that should be spare
  'cf'            => [],        # extra config lines
);


# bug 1725, 2192:
# Untaint all command-line options and ENV vars, since spamd is launched
# as a daemon from a known-safe environment. Also store away some of the
# vars we need for a SIGHUP later on.

# Testing for taintedness only works before detainting %ENV
Mail::SpamAssassin::Util::am_running_in_taint_mode();

# First clean PATH and untaint the environment -- need to do this before
# Cwd::cwd(), else it will croak.
Mail::SpamAssassin::Util::clean_path_in_taint_mode();
untaint_var( \%ENV );

# The zeroth argument will be replaced in daemonize().
my $ORIG_ARG0 = untaint_var($0);

# Getopt::Long clears all arguments it processed (untaint both @ARGVs here!)
my @ORIG_ARGV = untaint_var( \@ARGV );

# daemonize() switches to the root later on and we need to come back here
# somehow -- untaint the dir to be on the safe side.
my $ORIG_CWD = untaint_var( Cwd::cwd() );

prepare_for_sighup_restart();

# Parse the command line
Getopt::Long::Configure("bundling");
GetOptions(
  'allow-tell'               => \$opt{'tell'},
  'allowed-ips|A=s'          => \@{ $opt{'allowed-ip'} },
  'auth-ident'               => \$opt{'auth-ident'},
  'configpath|C=s'           => \$opt{'configpath'},
  'c'                        => \$opt{'create-prefs'},
  'create-prefs!'            => \$opt{'create-prefs'},
  'daemonize!'               => \$opt{'daemonize'},
  'debug|D:s'                => \$opt{'debug'},
  'd'                        => \$opt{'daemonize'},
  'groupname|g=s'            => \$opt{'groupname'},
  'helper-home-dir|H:s'      => \$opt{'home_dir_for_helpers'},
  'help|h'                   => \$opt{'help'},
  'ident-timeout=f'          => \$opt{'ident-timeout'},
  '4|ipv4only|ipv4-only|ipv4'=> sub { $opt{'force_ipv4'} = 1;
                                      $opt{'force_ipv6'} = 0; },
  '6'                        => sub { $opt{'force_ipv6'} = 1;
                                      $opt{'force_ipv4'} = 0; },
  'ldap-config!'             => \$opt{'ldap-config'},
  'listen|listen-ip|ip-address|i:s' => \@{ $opt{'listen-sockets'} },
  'local!'                   => \$opt{'local'},
  'L'                        => \$opt{'local'},
  'l'                        => \$opt{'tell'},
  'round-robin!'             => \$opt{'round-robin'},
  'min-children=i'           => \$opt{'min-children'},
  'max-children|m=i'         => \$opt{'max-children'},
  'min-spare=i'              => \$opt{'min-spare'},
  'max-spare=i'              => \$opt{'max-spare'},
  'max-conn-per-child=i'     => \$opt{'max-conn-per-child'},
  'nouser-config|x'          => sub { $opt{'user-config'} = 0 },
  'paranoid!'                => \$opt{'paranoid'},
  'P'                        => \$opt{'paranoid'},
  'pidfile|r=s'              => \$opt{'pidfile'},
  'port|p=s'                 => \$opt{'port'},
  'Q'                        => \$opt{'setuid-with-sql'},
  'q'                        => \$opt{'sql-config'},
  'server-cert=s'            => \$opt{'server-cert'},
  'server-key=s'             => \$opt{'server-key'},
  'setuid-with-ldap'         => \$opt{'setuid-with-ldap'},
  'setuid-with-sql'          => \$opt{'setuid-with-sql'},
  'siteconfigpath=s'         => \$opt{'siteconfigpath'},
  'cf=s'                     => \@{$opt{'cf'}},
  'socketgroup=s'            => \$opt{'socketgroup'},
  'socketmode=s'             => \$opt{'socketmode'},
  'socketowner=s'            => \$opt{'socketowner'},
  'socketpath=s'             => \$opt{'socketpath'},
  'sql-config!'              => \$opt{'sql-config'},
  'ssl'                      => \$opt{'ssl'},
  'ssl-port=s'               => \$opt{'ssl-port'},
  'syslog-socket=s'          => \$opt{'syslog-socket'},
  'syslog|s=s'               => \$opt{'syslog'},
  'log-timestamp-fmt:s'      => \$opt{'log-timestamp-fmt'},
  'timeout-tcp|T=i'          => \$opt{'timeout-tcp'},
  'timeout-child|t=i'        => \$opt{'timeout-child'},
  'timing'                   => \$opt{'timing'},
  'user-config'              => \$opt{'user-config'},
  'username|u=s'             => \$opt{'username'},
  'version|V'                => \$opt{'version'},
  'virtual-config-dir=s'     => \$opt{'virtual-config-dir'},
  'v'                        => \$opt{'vpopmail'},
  'vpopmail!'                => \$opt{'vpopmail'},

  #
  # NOTE: These are old options.  We should ignore (but warn about)
  # the ones that are now defaults.  Everything else gets a die (see note2)
  # so the user doesn't get us doing something they didn't expect.
  #
  # NOTE2: 'die' doesn't actually stop the process, GetOptions() catches
  # it, then passes the error on, so we'll end up doing a Usage statement.
  # You can avoid that by doing an explicit exit in the sub.
  #
  
  # last in 2.3
  'F:i'                   => sub { warn "spamd: the -F option has been removed from spamd, please remove from your commandline and re-run\n"; exit 2; },
  'add-from!'             => sub { warn "spamd: the --add-from option has been removed from spamd, please remove from your commandline and re-run\n"; exit 2; },

  # last in 2.4
  'stop-at-threshold|S' => sub { warn "spamd: the -S option has been deprecated and is no longer supported, ignoring\n" },

) or print_usage_and_exit();

if ($opt{'help'}) {
  print_usage_and_exit(qq{For more details, use "man spamd".\n}, 'EX_OK');
}
if ($opt{'version'}) {
  print_version();
  exit($resphash{'EX_OK'});
}

my $log_timestamp_fmt = $opt{'log-timestamp-fmt'};
if (defined $log_timestamp_fmt && lc($log_timestamp_fmt) eq 'default') {
  undef $log_timestamp_fmt;  # undefined implies per-logger's default
}
if (defined $log_timestamp_fmt) {
  # a nondefault timestamp format was specified, need to reopen stderr logger
  Mail::SpamAssassin::Logger::remove('stderr');
  Mail::SpamAssassin::Logger::add(method => 'stderr',
				  timestamp_fmt => $log_timestamp_fmt);
}

# Enable debugging, if any areas were specified.  We do this already here,
# accessing some non-public API so we can use the convenient dbg() routine.
# Don't do this at home (aka any 3rd party tools), kids!
if (defined $opt{'debug'}) {
  $opt{'debug'} ||= 'all';
}
# always turn on at least info-level debugging for spamd
$opt{'debug'} ||= 'info';
# turn on debugging facilities as soon as possible
Mail::SpamAssassin::Logger::add_facilities($opt{'debug'});

# bug 2228: make the values of (almost) all parameters which accept file paths
# absolute, so they are still valid after daemonize()
foreach my $opt (
  qw(
  configpath
  siteconfigpath
  socketpath
  pidfile
  home_dir_for_helpers
  )
  )
{
  # rel2abs taints the new value!
  $opt{$opt} =
    untaint_file_path(File::Spec->rel2abs( $opt{$opt} )) if $opt{$opt};
}

# These can be changed on command line with -A flag
my $allowed_nets = Mail::SpamAssassin::NetSet->new();
if ( @{ $opt{'allowed-ip'} } ) {
  set_allowed_ip( grep length, map { split /,/ } @{ $opt{'allowed-ip'} } );
} else {
  set_allowed_ip('127.0.0.1', '::1');
}

# ident-based spamc user authentication
if ( $opt{'auth-ident'} ) {
  eval { require Net::Ident }
  or die "spamd: ident-based authentication requested, ".
         "but Net::Ident is unavailable: $@\n";

  $opt{'ident-timeout'} = undef if $opt{'ident-timeout'} <= 0.0;
  import Net::Ident qw(ident_lookup);
}

### Begin initialization of logging ########################

# The syslog facility can be changed on the command line with the
# --syslog flag. Special cases are:
# * A log facility of 'stderr' will log to STDERR
# * " "   "        "  'null' disables all logging
# * " "   "        "  'file' logs to the file "spamd.log"
# * Any facility containing non-word characters is interpreted as the name
#   of a specific logfile
my $log_facility = $opt{'syslog'} || 'mail';

# The --syslog-socket option specifies one of the possible socket types or
# logging mechanisms as accepted by the Sys::Syslog::setlogsock() subroutine.
# Depending on a version of Sys::Syslog and on the underlying operating system,
# one of the following values (or their subset) can be used: native, eventlog,
# tcp, udp, inet, unix, stream, pipe, console. The value 'eventlog' is
# specific to Win32 events logger and requires a perl module Win32::EventLog.
#
# In addition to values acceptable by Sys::Syslog::setlogsock(),
# a --syslog-socket=none is mapped to --syslog=stderr and $log_socket='file'.
#
# A value 'file' in variable $log_socket implies logging to any file handler
# (either a specific log file or STDERR), A value 'none' in $log_socket
# represents no logging, equivalent to --syslog=null.
#
# (old text: The socket to log over can be changed on the command line with
#  the --syslog-socket flag. Logging to any file handler (either a specific log
#  file or STDERR) is internally represented by a socket 'file', no logging
#  at all is 'none'. The latter is different from --syslog-socket=none which
#  gets mapped to --syslog=stderr and such --syslog-socket=file. An internal
#  socket of 'none' means as much as --syslog=null. Sounds complicated? It is.
#  But it works.
# )

my $log_socket = $opt{'syslog-socket'};

if (!defined $log_socket || $log_socket eq '') {
  $log_socket = am_running_on_windows() ? 'none' : 'unix';
} else {
  $log_socket = lc $log_socket;
}

# This is the default log file; it can be changed on the command line
# via a --syslog flag containing non-word characters.
my $log_file = "spamd.log";

# A specific log file was given (--syslog=/path/to/file).
if ($log_facility =~ /[^a-z0-9]/) {
  $log_file = $log_facility;
  $log_socket = 'file';
}
# The generic log file was requested (--syslog=file).
elsif (lc($log_facility) eq 'file') {
  $log_socket = 'file';
}
# The casing is kept only if the facility specified a file.
else {
  $log_facility = lc($log_facility);
}

# Either above or at the command line the socket was set
# to 'file' (--syslog-socket=file).
if ($log_socket eq 'file') {
  $log_facility = 'file';
}
# The socket 'none' (--syslog-socket=none) historically
# represents logging to STDERR.
elsif ($log_socket eq 'none') {
  $log_facility = 'stderr';
}

# Either above or at the command line the facility was set
# to 'stderr' (--syslog=stderr).
if ($log_facility eq 'stderr') {
  $log_socket = 'file';
}

# The --log-timestamp-fmt option can provide a POSIX strftime(3) format for
# timestamps included in each logged message. Each logger (stderr, file,
# syslog) has its own default value for a timestamp format, which applies when
# --log-timestamp-fmt option is not given, or with --log-timestamp-fmt=default 	
# Timestamps can be turned off by specifying an empty string with this
# option, e.g. --log-timestamp-fmt='' or just --log-timestamp-fmt=
# Typical use: --log-timestamp-fmt='%a %b %e %H:%M:%S %Y' .

# Logging via syslog is requested.
if ($log_socket ne 'file' && $log_facility ne 'null') {
  if (!Mail::SpamAssassin::Logger::add(method => 'syslog',
				       socket => $log_socket,
				       facility => $log_facility,
				       ident => 'spamd',
				       timestamp_fmt => $log_timestamp_fmt))
  {
    # syslog method failed 
    $log_facility = 'stderr';
  }
}
# Otherwise, the user wants to log to some file.
elsif ($log_facility eq 'file') {
  if (!Mail::SpamAssassin::Logger::add(method => 'file',
				       filename => $log_file,
				       timestamp_fmt => $log_timestamp_fmt))
  {
    # file method failed
    $log_facility = 'stderr';
  }
}

### End initialization of logging ##########################

# REIMPLEMENT: if $log_socket is none, fall back to log_facility 'stderr'.
# If log_fac is stderr and defined $opt{'debug'}, set log_fac to 'null' to
# avoid duplicating log messages.
# TVD: isn't this already done up above?

# support setuid() to user unless:
# run with -u
# we're not root
# doing --vpopmail or --virtual-config-dir
# using --sql-config or --ldap-config
# (unless we're also using --setuid-with-sql or --setuid-with-ldap)
my $setuid_to_user = (
        $opt{'username'} ||
        $> != 0 ||
        $opt{'vpopmail'} ||
        $opt{'virtual-config-dir'} ||
        ($opt{'sql-config'} && !$opt{'setuid-with-sql'}) ||
        ($opt{'ldap-config'} && !$opt{'setuid-with-ldap'})
      ) ? 0 : 1;

dbg("spamd: will perform setuids? $setuid_to_user");

if ( $opt{'vpopmail'} ) {
  if ( !$opt{'username'} ) {
    die "spamd: cannot use --vpopmail without -u\n";
  }
}

if ( $opt{'virtual-config-dir'} ) {
  if ( !$opt{'username'} ) {
    die "spamd: cannot use --virtual-config-dir without -u\n";
  }
}

if ($opt{'sql-config'} && !$opt{'setuid-with-sql'}) {
  if ( !$opt{'username'} ) {
    die "spamd: cannot use --sql-config without -u\n";
  }
}

if ($opt{'ldap-config'} && !$opt{'setuid-with-ldap'}) {
  if ( !$opt{'username'} ) {
    die "spamd: cannot use --ldap-config without -u\n";
  }
}

# always copy the config, later code may disable
my $copy_config_p = 1;

my $current_user;

my $client;               # used for the client connection ...
my $childlimit;           # max number of kids allowed
my $timeout_tcp;          # socket timeout (connect->headers), 0=no timeout
my $timeout_child;        # processing timeout (headers->finish), 0=no timeout
my $clients_per_child;    # number of clients each child should process
my %children;             # current children
my @children_exited;

if ( defined $opt{'max-children'} ) {
  $childlimit = $opt{'max-children'};

  # Make sure that the values are at least 1
  $childlimit = undef if ( $childlimit < 1 );
}

if ( defined $opt{'max-conn-per-child'} ) {
  $clients_per_child = $opt{'max-conn-per-child'};

  # Make sure that the values are at least 1
  $clients_per_child = undef if ( $clients_per_child < 1 );
}

# Set some "sane" limits for defaults
$childlimit        ||= 5;
$clients_per_child ||= 200;

if (defined $opt{'timeout-tcp'} && $opt{'timeout-tcp'} >= 0) {
  $timeout_tcp = $opt{'timeout-tcp'};
  $timeout_tcp = undef if ($timeout_tcp == 0);
}
else {
  $timeout_tcp = 30;
}

if (defined $opt{'timeout-child'} && $opt{'timeout-child'} >= 0) {
  $timeout_child = $opt{'timeout-child'};
  $timeout_child = undef if ($timeout_child == 0);
}
else {
  $timeout_child = 300;
}

# ensure scaling parameters are logical
if ($opt{'min-children'} < 1) {
  $opt{'min-children'} = 1;
}
if ($opt{'min-spare'} < 0) {
  $opt{'min-spare'} = 0;
}
if ($opt{'min-spare'} > $childlimit) {
  $opt{'min-spare'} = $childlimit-1;
}
if ($opt{'max-spare'} < $opt{'min-spare'}) {
  # emulate Apache behaviour:
  # http://httpd.apache.org/docs-2.0/mod/prefork.html#maxspareservers
  $opt{'max-spare'} = $opt{'min-spare'}+1;
}

my $dontcopy = 1;
if ( $opt{'create-prefs'} ) { $dontcopy = 0; }

my $orighome;
if ( defined $ENV{'HOME'} ) {
  if ( defined $opt{'username'} )
  {    # spamd is going to run as another user, so reset $HOME
    if ( my $nh = ( getpwnam( $opt{'username'} ) )[7] ) {
      $ENV{'HOME'} = $nh;
    }
    else {
      die "spamd: unable to determine home directory for user '"
        . $opt{'username'} . "'\n";
    }
  }

  $orighome = $ENV{'HOME'};    # keep a copy for use by Razor, Pyzor etc.
  delete $ENV{'HOME'};         # we do not want to use this when running spamd
}

# Do whitelist later in tmp dir. Side effect: this will be done as -u user.

$opt{'server-key'}  ||= "$LOCAL_RULES_DIR/certs/server-key.pem";
$opt{'server-cert'} ||= "$LOCAL_RULES_DIR/certs/server-cert.pem";

# ---------------------------------------------------------------------------
# Server (listening) socket setup for the various supported types

dbg("spamd: socket module of choice: %s %s, Socket %s".
    ", %s PF_INET, %s PF_INET6, %s, AI_ADDRCONFIG %s",
    $io_socket_module_name,
    $io_socket_module_name->VERSION,
    Socket->VERSION,
    $have_inet4 ? 'have' : 'no',
    $have_inet6 ? 'have' : 'no',
    $have_getaddrinfo_in_core ? 'using Socket::getaddrinfo'
    : $have_getaddrinfo_legacy ? 'using legacy Socket6::getaddrinfo'
    : 'no getaddrinfo, using gethostbyname, IPv4-only',
    $ai_addrconfig_flag ? "is supported" : "not supported",
);

my $have_ssl_module;
my @listen_sockets;  # list of hashrefs, contains info on all listen sockets
my $server_select_mask;

my @listen_socket_specs = @{$opt{'listen-sockets'}};

{ # merge legacy option --socketpath into @listen_socket_specs
  my $socketpath = $opt{'socketpath'};
  if (defined $socketpath && $socketpath ne '') {
    $socketpath =~ m{^/}
      or die "socketpath option should specify an absolute path: $socketpath";
    push(@listen_socket_specs, $socketpath);
  }
}

# supply a default socket (loopback IP address) if none specified
push(@listen_socket_specs, 'localhost')  if !@listen_socket_specs;

for (@listen_socket_specs) {
  my $socket_specs = $_;

  $socket_specs = '*'  if $socket_specs eq '';  # empty implies all interfaces

  local($1,$2,$3,$4,$5,$6);
  if ($socket_specs =~
           m{^ (?: (ssl) : )?
               ( / .* ) \z }xsi) {  # unix socket - absolute path
    my($proto,$path) = ($1, $2);
  # $proto = 'ssl'  if defined $opt{'ssl'} || defined $opt{'ssl-port'};
    $proto = !defined($proto) ? '' : lc($proto);
    # abstracted out the setup-retry code
    dbg("spamd: unix socket: %s", $path);
    server_sock_setup(\&server_sock_setup_unix, $socket_specs, $path);

  } elsif ($socket_specs =~
           m{^ (?: (ssl) : )?
               (?: \[ ( [^\]]* ) \]
                 | ( [a-z0-9._-]* )
                 | ( [a-f0-9]* : [a-f0-9]* : [a-f0-9:]*
                     (?: % [a-z0-9._~-]* )? \z )
                 | ( \* )
               )?
               (?: : ( [a-z0-9-]* ) )? \z }xsi) {
    my($proto,$addr,$port) = ($1, $2||$3||$4||$5, $6);
    $addr = 'localhost'  if !defined $addr;
    $proto = 'ssl'  if defined $opt{'ssl'} || defined $opt{'ssl-port'};
    $proto = !defined($proto) ? '' : lc($proto);
    $port = $opt{'ssl-port'}  if !defined $port && $proto eq 'ssl';
    $port = $opt{'port'}      if !defined $port || $port eq '';
    $port = '783'             if !defined $port || $port eq '';
    if ($port ne '' && $port !~ /^(\d+)\z/) {
      $port = ( getservbyname($port,'tcp') )[2];
      $port or die "spamd: invalid port: $port, socket: $socket_specs\n";
    }
    # abstracted out the setup-retry code
    dbg('spamd: %s socket specification: "%s", IP address: %s, port: %s',
        $proto, $socket_specs, $addr, $port);
    server_sock_setup(\&server_sock_setup_inet,
                      $socket_specs, $addr, $port, $proto eq 'ssl' ? 1 : 0);
  } else {
    die "Invalid socket specification syntax: $socket_specs\n";
  }
}

@listen_sockets  or die "No listen sockets specified, aborting\n";

# ---------------------------------------------------------------------------

# Check for server certs
if ( $have_ssl_module ) {
  if ( !-e $opt{'server-key'} ) {
    die "spamd: server key file $opt{'server-key'} does not exist\n";
  }
  if ( !-e $opt{'server-cert'} ) {
    die "spamd: server certificate file $opt{'server-cert'} does not exist\n";
  }
}

# ---------------------------------------------------------------------------

my $sockets_access_lock_tempfile;  # a File::Temp object, if locking is needed
my $sockets_access_lock_fh;  # per-child file handle on a lock file

my $backchannel = Mail::SpamAssassin::SubProcBackChannel->new();
my $scaling;

if (!$opt{'round-robin'})
{
  my $max_children = $childlimit;

  # change $childlimit to avoid churn when we startup and create loads
  # of spare servers; when we're using scaling, it's not as important
  # as it was with the old algorithm.
  if ($childlimit > $opt{'max-spare'}) {
    $childlimit = $opt{'max-spare'};
  }
  if ($childlimit < $opt{'min-children'}) {
    $childlimit = $opt{'min-children'};
  }

  $scaling = Mail::SpamAssassin::SpamdForkScaling->new({
        backchannel => $backchannel,
        min_children => $opt{'min-children'},
        max_children => $max_children,
        min_idle => $opt{'min-spare'},
        max_idle => $opt{'max-spare'},
        cur_children_ref => \$childlimit
      });
}

# ---------------------------------------------------------------------------

sub compose_listen_info_string {
  my @listeninfo;

  for my $socket_info (@listen_sockets) {
    next if !$socket_info;
    my $socket = $socket_info->{socket};
    next if !$socket;
    my $socket_specs = $socket_info->{specs};

    if ($socket->isa('IO::Socket::UNIX')) {
      push(@listeninfo, "UNIX domain socket " . $socket_info->{path});

    } elsif ( $socket->isa('IO::Socket::INET')  ||
              $socket->isa('IO::Socket::INET6') ||
              $socket->isa('IO::Socket::IP') ) {
      push(@listeninfo, sprintf("%s [%s]:%s", ref $socket,
                      $socket_info->{ip_addr}, $socket_info->{port}));

    } elsif ($socket->isa('IO::Socket::SSL')) {
      push(@listeninfo, sprintf("SSL [%r]:%s", $socket_info->{ip_addr},
                      $socket_info->{port}));
    }
  }

  # just for reporting at startup
  return join(', ', @listeninfo);
}

sub server_sock_setup {
  my($sub, @args) = @_;

  # retry 3 times to bind to the listening socket; 3 seconds delay,
  # max, but should allow a little time for any existing shutting-down
  # server to complete shutdown
  my $lastretry = 10;
  for my $retry (1 .. $lastretry) {
    if ($retry > 1) { sleep 1; }

    eval { &$sub(@args) } and last;  # success => break

    if ($retry == $lastretry) {
      die $@;               # this is fatal
    } else {
      warn "server socket setup failed, retry $retry: $@";
      # but retry
    }
  }
}

# ---------------------------------------------------------------------------

# Create the sockets
sub server_sock_setup_unix {
  my($socket_specs, $path) = @_;

  # see if the socket is in use: if we connect to the current socket, it
  # means that spamd is already running, so we have to bail on our own.
  # Yes, there is a window here: best we can do for now. There is almost
  # certainly a better way, but we don't know it. Yet.

  if (-e $path) {
    unless (-S $path) {
      die "spamd: file $path exists but is no socket, exiting\n";
    }
  
    if ( IO::Socket::UNIX->new( Peer => $path, Type => &SOCK_STREAM ) ) {
      # socket bind successful: must already be running

      # make sure not to enter this socket into @listen_sockets,
      # otherwise exit handlers would unlink it!
      die "spamd: already running on $path, exiting\n";
    }
    else {
      dbg("spamd: removing stale socket file $path");
      unlink $path;
    }
  }
  if (not -d (File::Spec->splitpath($path))[1]) {
    die "spamd: directory for $path does not exist, exiting\n";
  }

  my %socket = (
    Local  => $path,
    Type   => &SOCK_STREAM,
    Listen => &SOMAXCONN,
  );
  dbg("spamd: creating UNIX socket:\n" . join("\n", map { " $_: " . (defined $socket{$_} ? $socket{$_} : "(undef)") } sort keys %socket));
  my $server_unix = IO::Socket::UNIX->new(%socket);
  
  # sanity check!  cf. bug 3490
  if (not $server_unix or not -S $path) {
    unless ($server_unix) {
      dbg "spamd: socket path might have been truncated due to system limits\n";
      die "spamd: could not create UNIX socket on $path: $!\n";
    }
    my $hostpath = $server_unix->hostpath();
    if ($hostpath ne $path) {
      warn "spamd: socket path was truncated at position " . length($hostpath) . "\n";
      warn "spamd: leaving stale socket at $hostpath\n" if -S $hostpath;
      die "spamd: path length for UNIX socket on $path exceeds system limit, exiting\n";
    }
    else {
      die "spamd: could not find newly-created UNIX socket on $path: $!\n";
    }
  }

  my $mode = $opt{socketmode};
  if ($mode) {
    $mode = oct $mode;
  } else {
    $mode = 0666;        # default
  }

  my $owner = $opt{socketowner};
  my $group = $opt{socketgroup};
  if ($owner || $group) {
    my $uid = -1;
    my $gid = -1;
    if ($owner) {
      my ($login,$pass,$puid,$pgid) = getpwnam($owner)
                           or die "spamd: $owner not in passwd database\n";
      $uid = $puid;
    }
    if ($group) {
      my ($name,$pass,$ggid,$members) = getgrnam($group)
                           or die "spamd: $group not in group database\n";
      $gid = $ggid;
    }
    if (!chown $uid, $gid, $path) {
      die "spamd: could not chown $path to $uid/$gid: $!";
    }
  }

  if (!chmod $mode, $path) {    # make sure everybody can talk to it
    die "spamd: could not chmod $path to $mode: $!";
  }

  push(@listen_sockets, { specs => $socket_specs,
                          path => $path,
                          socket => $server_unix,
                          fd => $server_unix->fileno })  if $server_unix;
  1;
}

sub server_sock_setup_inet {
  my($socket_specs, $addr, $port, $ssl) = @_;

  $have_inet4 || $have_inet6
    or warn "spamd: neither the PF_INET (IPv4) nor the PF_INET6 (IPv6) ".
            "protocol families seem to be available, pushing our luck anyway\n";

  my $ai_family = &AF_UNSPEC;  # defaults to any address family (i.e. both)
  if      ($have_inet6 && (!$have_inet4 || $opt{'force_ipv6'})) {
    $ai_family = &AF_INET6;
  } elsif ($have_inet4 && (!$have_inet6 || $opt{'force_ipv4'})) {
    $ai_family = &AF_INET;
  }
  my($error, @addresses);
  if (!defined $addr || lc $addr eq 'localhost') {  # loopback interface
    push(@addresses, '::1')
      if $ai_family == &AF_UNSPEC || $ai_family == &AF_INET6;
    push(@addresses, '127.0.0.1')
      if $ai_family == &AF_UNSPEC || $ai_family == &AF_INET;
  } elsif ($addr eq '*' || $addr eq '') {  # any address
    push(@addresses, '::')
      if $ai_family == &AF_UNSPEC || $ai_family == &AF_INET6;
    push(@addresses, '0.0.0.0')
      if $ai_family == &AF_UNSPEC || $ai_family == &AF_INET;
  } else {
    ($error, @addresses) = ip_or_name_to_ip_addresses($addr, $ai_family);
  }
  die "spamd: invalid address for a listen socket: \"$socket_specs\": $error\n"
    if $error;
  die "spamd: no valid address for a listen socket: \"$socket_specs\"\n"
    if !@addresses;

  dbg("spamd: attempting to listen on IP addresses: %s, port %d",
      join(', ',@addresses), $port);
  my(@diag_succ, @diag_fail);
  for my $adr (@addresses) {
    my %sockopt = (
      LocalAddr => $adr,
      LocalPort => $port,
      Type      => &SOCK_STREAM,
      Proto     => 'tcp',
      ReuseAddr => 1,
      Listen    => &SOMAXCONN,
    );
    $sockopt{V6Only} = 1  if $io_socket_module_name eq 'IO::Socket::IP'
                             && IO::Socket::IP->VERSION >= 0.09;
    %sockopt = (%sockopt, (
      SSL_verify_mode => 0x00,
      SSL_key_file    => $opt{'server-key'},
      SSL_cert_file   => $opt{'server-cert'},
    ))  if $ssl;
    dbg("spamd: creating %s socket: %s",
        $ssl ? 'IO::Socket::SSL' : $io_socket_module_name,
        join(', ', map("$_: ".(defined $sockopt{$_} ? $sockopt{$_} : "(undef)"),
                       sort keys %sockopt)));
    if ($ssl && !$have_ssl_module) {
      eval { require IO::Socket::SSL }
        or die "spamd: SSL encryption requested, ".
               "but IO::Socket::SSL is unavailable ($@)\n";
      $have_ssl_module = 1;
    }
    my $server_inet = $ssl ? IO::Socket::SSL->new(%sockopt)
                           : $io_socket_module_name->new(%sockopt);
    my $diag;
    if (!$server_inet) {
      $diag = sprintf("could not create %s socket on [%s]:%s: %s",
                      $ssl ? 'IO::Socket::SSL' : $io_socket_module_name,
                      $adr, $port, $ssl && $IO::Socket::SSL::SSL_ERROR ?
                      "$!,$IO::Socket::SSL::SSL_ERROR" : $!);
      push(@diag_fail, $diag);
    } else {
      $diag = sprintf("created %s socket on [%s]:%s",
                      $ssl ? 'IO::Socket::SSL' : $io_socket_module_name,
                      $adr, $port);
      push(@diag_succ, $diag);
      push(@listen_sockets, { specs => $socket_specs,
                              ip_addr => $adr, port => $port,
                              socket => $server_inet,
                              fd => $server_inet->fileno });
    }
    dbg("spamd: %s", $diag);
  }
  if (!@diag_fail) {
    # no failures, nothing to report
  } elsif (@diag_succ) {  # some failures and some success
    # just warn of all attempts, successful and failed
    warn "spamd: $_\n"  for @diag_succ;
    warn "spamd: $_\n"  for @diag_fail;
  } else {  # all failed, no success
    warn "spamd: $_\n"  for @diag_fail[0 .. $#diag_fail-1];
    die  "spamd: $_\n"  for $diag_fail[-1];
  }

  1;
}

# ---------------------------------------------------------------------------

# for select() purposes: make a map of the server socket FDs
map_server_sockets();

if (!$scaling && @listen_sockets > 1) {
  require File::Temp;

  # Have multiple sockets and autonomous child processes (--round-robin),
  # prepare an anonymous lock file to protect access to select+accept.

  # using the same choice of a tmp dir as in Util::secure_tmpfile()
  my $tmpdir = untaint_file_path($ENV{'TMPDIR'} || File::Spec->tmpdir);

  # the file will be automatically removed by DESTROY on program exit
  $sockets_access_lock_tempfile =
    File::Temp->new(DIR => $tmpdir, SUFFIX => '.lck', EXLOCK => 0);

  dbg("spamd: created a lock file %s to protect select+accept",
      $sockets_access_lock_tempfile->filename);
}

if ( defined $opt{'pidfile'} ) {
  $opt{'pidfile'} = untaint_file_path( $opt{'pidfile'} );
}


my $spamtest = Mail::SpamAssassin->new(
  {
    dont_copy_prefs      => $dontcopy,
    rules_filename       => ( $opt{'configpath'} || 0 ),
    site_rules_filename  => ( $opt{'siteconfigpath'} || 0 ),
    post_config_text     => join("\n", @{$opt{'cf'}})."\n",
    force_ipv4           => ( $opt{'force_ipv4'} || 0 ),
    local_tests_only     => ( $opt{'local'} || 0 ),
    debug                => ( $opt{'debug'} || 0 ),
    paranoid             => ( $opt{'paranoid'} || 0 ),
    require_rules        => 1,
    skip_prng_reseeding  => 1,  # let us do the reseeding by ourselves
    home_dir_for_helpers => (
      defined $opt{'home_dir_for_helpers'}
      ? $opt{'home_dir_for_helpers'}
      : $orighome
    ),
    PREFIX          => $PREFIX,
    DEF_RULES_DIR   => $DEF_RULES_DIR,
    LOCAL_RULES_DIR => $LOCAL_RULES_DIR,
    LOCAL_STATE_DIR => $LOCAL_STATE_DIR
  }
);

#Enable Timing?
if ($opt{'timing'}) {
  $spamtest->timer_enable();
}

# if $clients_per_child == 1, there's no point in copying configs around
unless ($clients_per_child > 1) {
  # unset $copy_config_p so we don't bother trying to copy things back
  # after closing the connection
  $copy_config_p = 0;
}

# See Bug 6837: establishing a __DIE__ handler should be done after
# most modules have been loaded, as the $^S cannot distinguish
# true failures from eval attempt failures within a 'require'-d module.
# If the problem persists in some late-lodaded modules, we may need
# to tighten the condition to something like 'if defined $^S && !$^S'.
#
# redirect __WARN__ and __DIE__
# do not trap warnings here based on eval scope; evals are very
# common throughout.  die()s can be trapped though.
$SIG{__WARN__} = sub {
  log_message("warn", $_[0]);
};
$SIG{__DIE__} = sub {
  # see http://use.perl.org/comments.pl?mode=flat&sid=33872 for $^S
  log_message("error", $_[0]) unless $^S;
};

## DAEMONIZE! ##

my $originalparent = $$;
$opt{'daemonize'} and daemonize();

# bug 3443: setup signal handlers before the kids since we may have to
# kill them...  make sure this happens before setting up the pidfile to
# avoid a race condition.
my $got_sighup;
setup_parent_sig_handlers();

# should be done post-daemonize such that any files created by this
# process are written with the right ownership and everything.
preload_modules_with_tmp_homedir();

# this must be after preload_modules_with_tmp_homedir(), for bug 5606
$spamtest->init_learner({
  opportunistic_expire_check_only => 1,
});

# bayes DBs may still be tied() at this point, so untie them and such.
$spamtest->finish_learner();

# If we're going to be switching users in check(), let's backup the
# fresh configuration now for later restoring ...  MUST be placed after
# the M::SA creation.
my %conf_backup;
my %msa_backup;

if ($copy_config_p) {
  foreach( 'username', 'user_dir', 'userstate_dir', 'learn_to_journal' ) {
    $msa_backup{$_} = $spamtest->{$_} if (exists $spamtest->{$_});
  }

  $spamtest->copy_config(undef, \%conf_backup) ||
    die "spamd: error returned from copy_config\n";
}

# bonus: SIGUSR2 to dump a stack trace.  this is never reset
my $current_msgid = "(none)";
$SIG{USR2} = \&backtrace_handler  if !am_running_on_windows();

# log server started, but processes watching the log to wait for connect
# should wait until they see the pid, after signal handlers are in place
# FIXME: two calls are one too much
info("spamd: server started on %s (running version %s)",
     compose_listen_info_string(), Mail::SpamAssassin::Version());

my $remote_port;

# Make the pidfile ...
if (defined $opt{'pidfile'}) {
  if (open PIDF, ">$opt{'pidfile'}") {
    print PIDF "$$\n";
    close PIDF;
  }
  else {
    warn "spamd: cannot write to PID file: $!\n";
  }
}

# The "prefork_init" plugin callback is called in the parent process shortly
# before forking off child processes. It allows plugins which were activated
# by the master spamd process to prepare for a fork, e.g. by closing or
# dropping some resources which won't be of any use by a child process.
#
$spamtest->call_plugins("prefork_init");  # since SA 3.4.0

# now allow waiting processes to connect, if they're watching the log.
# The test suite does this!
info("spamd: server pid: $$");
kill("USR1",$originalparent) if ($opt{'daemonize'});

# Fork off our children.
for ( 1 .. $childlimit ) {
  spawn();
}

if ($scaling) {
  $scaling->set_server_fh(map($_->{socket},@listen_sockets));
}

while (1) {
  if (!$scaling) {
    # wait for a signal (ie: child's death)
    # bug 4190: use a time-limited sleep, and call child_handler() even
    # if haven't received a SIGCHLD, due to inherent race condition
    sleep 10;
  } else {
    $scaling->main_server_poll($opt{'server-scale-period'});
  }
  # bug 6377: on win32 the parent never receives SIGCHLD
# child_handler()  if !$scaling || am_running_on_windows();
  child_handler();  # it doesn't hurt to call child_handler unconditionally

  child_cleaner();

  do_sighup_restart()  if defined $got_sighup;

  for (my $i = keys %children; $i < $childlimit; $i++) {
    spawn();
  }
}

# Kicks off a kid ...
sub spawn {
  my $pid;

  $backchannel->setup_backchannel_parent_pre_fork();

  # block signal for fork
  my $sigset;
  if (!am_running_on_windows()) {
    $sigset = POSIX::SigSet->new( POSIX::SIGINT(), POSIX::SIGCHLD() );
    sigprocmask( POSIX::SIG_BLOCK(), $sigset )
      or die "spamd: cannot block SIGINT/SIGCHLD for fork: $!\n";
  }    

  $pid = fork();
  die "spamd: fork: $!" unless defined $pid;

  if ($pid) {
    ## PARENT

    $children{$pid} = 1;
    info("spamd: server successfully spawned child process, pid $pid");
    $backchannel->setup_backchannel_parent_post_fork($pid);
    if ($scaling) {
      $scaling->add_child($pid);
    }
    if (!am_running_on_windows()) {
      sigprocmask( POSIX::SIG_UNBLOCK(), $sigset )
        or die "spamd: cannot unblock SIGINT/SIGCHLD for fork: $!\n";
    }
    #Changing to return the process id to improve communications for bug 6304
    return $pid;
  }
  else {
    ## CHILD

    # Reset signal handling to default settings, and unblock.
    # These lines must be as soon as possible after the fork (bug 4304)
    setup_child_sig_handlers();
    if (!am_running_on_windows()) {
      sigprocmask( POSIX::SIG_UNBLOCK(), $sigset )
        or die "spamd: cannot unblock SIGINT/SIGCHLD for fork: $!\n";
    }

    srand;  # reseed pseudorandom number generator soon for each child process
    $spamtest->call_plugins("spamd_child_init");

    if ($sockets_access_lock_tempfile) {
      # A lock will be required across select+accept in a child processes,
      # Bug 6996. Need to have a per-child filehandle on the same lock file
      # for flock to work, let's dup(2) the parent's file handle.
      my $fname = $sockets_access_lock_tempfile->filename;
      $sockets_access_lock_fh = IO::File->new($fname, "+>");
      $sockets_access_lock_fh or die "Can't open a lock file $fname: $!";
    }

    # support non-root use
    if ( $opt{'username'} ) {
      my ( $uuid, $ugid ) = ( getpwnam( $opt{'username'} ) )[ 2, 3 ];
      if ( !defined $uuid || $uuid == 0 ) {
        die "spamd: cannot run as nonexistent user or root with -u option\n";
      }

      if ( $opt{'groupname'} ) {
        $ugid = getgrnam( $opt{'groupname'} ) || $ugid;
      }

      # bug 5518: assignments to $) and $( don't always work on all platforms
      # bug 3900: assignments to $> and $< problems with BSD perl bug
      # use the POSIX functions to hide the platform specific workarounds 
      dbg("spamd: Privilege de-escalation from user $< and groups $(\n");
      $! = 0;
      POSIX::setgid($ugid);  # set effective and real gid
      dbg("spamd: setgid ERRNO is $!\n");
      $( = $ugid;
      $) = "$ugid ".(get_user_groups($uuid));  # set effective and real gid/grouplist another way because we lack initgroups in Perl
      dbg("spamd: group assignment ERRNO is $!\n");
      POSIX::setuid($uuid);  # set effective and real UID
      dbg("spamd: setuid ERRNO is $!\n");
      $< = $uuid; $> = $uuid;   # bug 5574
      dbg("spamd: uid assignment ERRNO is $!\n");
      dbg("spamd: real user is $< \neff user is $> \nreal groups are $( \neff groups are $) \n");


      # keep the sanity check to catch problems like bug 3900 just in case
      if ( $> != $uuid and $> != ( $uuid - 2**32 ) ) {
        die "spamd: setuid to uid $uuid failed (> = $>, < = $<)\n";
      }
    }

    # set process name where supported
    # this will help make it clear via process listing which is child/parent
    $0 = 'spamd child';

    $backchannel->setup_backchannel_child_post_fork();
    if ($scaling) {     # only do this once, for efficiency; $$ is a syscall
      $scaling->set_my_pid($$);
    }

    # handle $clients_per_child connections, then die in "old" age...
    my $orders;
    for ( my $i = 0 ; $i < $clients_per_child ; $i++ ) {
      if ($scaling) {
        $scaling->update_child_status_idle();
        $orders = $scaling->wait_for_orders(); # and sleep...

        if ($orders != PFORDER_ACCEPT) {
          info("spamd: unknown order: $orders");
        }
      }

      # use a large eval scope to catch die()s and ensure they
      # don't kill the server.
      my $evalret = eval { accept_a_conn($scaling ? 0.5 : undef); };

      if (!defined $evalret) {
        warn("spamd: error: $@ $!, continuing");
        if ($client) { $client->close(); }  # avoid fd leaks
      }
      elsif ($evalret == -1) {
        # serious error; used for accept() failure
        die("spamd: respawning server");
      }

      $spamtest->call_plugins("spamd_child_post_connection_close");

      # if we changed UID during processing, change back!
      if ($setuid_to_user && ($> != $<) && ($> != ($< - 2**32))) {
        $) = "$( $(";    # change eGID
        $> = $<;         # change eUID

        # check again; ensure the change happened
        if ($> != $< && ($> != ( $< - 2**32))) {
          # make it fatal to avoid security breaches
          die("spamd: return setuid failed");
        }
      }

      if ($copy_config_p) {
        # use a timeout!  There are bugs in Storable on certain platforms
        # that can cause spamd to hang -- see bug 3828 comment 154.
        # we don't use Storable any more, but leave this in -- just
        # in case.
	# bug 4699: this is the alarm that often ends up with an empty $@

	my $timer = Mail::SpamAssassin::Timeout->new({ secs => 20 });
	my $err = $timer->run(sub {	

          while(my($k,$v) = each %msa_backup) {
            $spamtest->{$k} = $v;
          }

          # if we changed user, we would have also loaded up new configs
          # (potentially), so let's restore back the saved version we
          # had before.
          $spamtest->copy_config(\%conf_backup, undef) ||
            die "spamd: error returned from copy_config\n";
        });

	if ($timer->timed_out()) {
	  warn("spamd: copy_config timeout, respawning child process after ".
		($i+1)." messages");
	  exit;		# so that the master spamd can respawn
	}
      }
      undef $current_user;

      #LOG TIMING
      if ($opt{'timing'}) {
        info("timing: " . $spamtest->timer_report());
      } else {
        dbg("timing: " . $spamtest->timer_report()) if would_log('dbg', 'timing');
      }
    }

    # If the child lives to get here, it will die ...  Muhaha.
    exit;
  }
}

sub accept_from_any_server_socket {
  my($timeout) = @_;
  my($client, $selected_socket_info, $socket, $locked);

  eval {
    if (!@listen_sockets) {
      # nothing?
      die "no sockets?";

    } elsif (@listen_sockets == 1) {
      $selected_socket_info = $listen_sockets[0];

    } else {
      # determine which of our server FDs is ready using select().
      # We only need to do this if we have more than one server
      # socket supported, since otherwise there can only be one socket
      # with a client waiting.
      # (TODO: we could extend the prefork protocol to pass this data)

      if ($sockets_access_lock_fh) {
        dbg("spamd: acquiring a lock over select+accept");
        # with multipe sockets a lock across select+accept is needed, Bug 6996
        flock($sockets_access_lock_fh, LOCK_EX)
          or die "Can't acquire lock access to sockets: $!";
        $locked = 1;
      }

      my $sel_mask_str = unpack('b*', $server_select_mask);
      dbg("spamd: select() on fd bit field %s, %s, %s",
          $sel_mask_str, defined $timeout ? "timeout $timeout" : "no timeout",
          $locked ? "locked" : "not locked");

      my $fdvec = $server_select_mask;
      my $nfound = select($fdvec, undef, undef, $timeout);

      if (!defined $nfound || $nfound < 0) {
        die "select failed on fd bit field $sel_mask_str: $!";
      } elsif (!$nfound) {
        die "no fd ready, fd bit field $sel_mask_str";
      }

      my(@ready_fd) =  # list of file desciptors ready for read
        grep(defined $_->{fd} && vec($fdvec, $_->{fd}, 1), @listen_sockets);
      if (!@ready_fd) {
        die "no file descriptors matching a bit field " . unpack('b*',$fdvec);
      } elsif (@ready_fd == 1) {  # easy, just one is ready
        $selected_socket_info = $ready_fd[0];
      } else {  # give equal opportunity to each ready socket
        my $j = int rand(@ready_fd);
        $selected_socket_info = $ready_fd[$j];
        dbg("spamd: requests ready on multiple sockets, picking #%d out of %d",
            $j+1, scalar @ready_fd);
      }

    } # end multiple sockets case

    if ($selected_socket_info) {
      my $socket = $selected_socket_info->{socket};
      $socket or die "no socket???, impossible";
      dbg("spamd: accept() on fd %d", $selected_socket_info->{fd});
      $client = $socket->accept;
    }
    1;  # end eval with success

  } or do {
    my $err = $@ ne '' ? $@ : "errno=$!";  chomp $err;
    if ($locked) {
      dbg("spamd: releasing a lock over select+accept");
      flock($sockets_access_lock_fh, LOCK_UN)
        or die "Can't release sockets-access lock: $!";
      $locked = 0;
    }
    die "accept_a_conn: $err";
  };

  if ($locked) {
    dbg("spamd: releasing a lock over select+accept");
    flock($sockets_access_lock_fh, LOCK_UN)
      or die "Can't release sockets-access lock: $!";
  }
  if(!defined $client) {
    if(defined($socket)) {
      die sprintf("accept_a_conn: %s accept failed: %s",
                         ref $socket,
                         !$socket->isa('IO::Socket::SSL') ? $!
                           : $socket->errstr.", $!");
    } else {
      die sprintf("accept_a_conn: no socket available");
    }
  }
  return ($client, $selected_socket_info);
}

sub accept_a_conn {
  my ($timeout) = @_;

  my $socket_info;
  # $client is a global variable
  ($client, $socket_info) = accept_from_any_server_socket($timeout);

  if ($scaling) {
    $scaling->update_child_status_busy();
  }

  # Bah!
  if ( !$client  || !defined $client->connected() ) {

    # this can happen when interrupted by SIGCHLD on Solaris,
    # perl 5.8.0, and some other platforms with -m.
    if ( $! == &Errno::EINTR ) {
      return 0;
    }
    else {
      warn("spamd: accept failed: $!");
      return -1;
    }
  }

  $client->autoflush(1);

  # keep track of start time
  $spamtest->timer_reset;
  my $start = time;

  my ($remote_hostname, $remote_hostaddr, $local_port);

  if ($client->isa('IO::Socket::UNIX')) {
    $remote_hostname = 'localhost';
    $remote_hostaddr = '127.0.0.1';
    $remote_port = $socket_info->{path};
    info("spamd: got connection over %s", $socket_info->{path});
  }
  else {
    ($remote_port, $remote_hostaddr, $remote_hostname, $local_port) =
      peer_info_from_socket($client);
    $remote_hostaddr or die 'failed to obtain port and ip from socket';

    my $msg = sprintf("connection from %s [%s]:%s to port %d, fd %d",
                      $remote_hostname, $remote_hostaddr, $remote_port,
                      $local_port, $socket_info->{fd});
    if (ip_is_allowed($remote_hostaddr)) {
      info("spamd: $msg");
    }
    else {
      warn("spamd: unauthorized $msg");
      $client->close;
      return 0;
    }
  }

  local ($_);
  eval {
    Mail::SpamAssassin::Util::trap_sigalrm_fully(sub {
                          die "tcp timeout";
                        });
    alarm $timeout_tcp if ($timeout_tcp);
    # send the request to the child process
    $_ = $client->getline;
  };
  alarm 0;

  if ($@) {
    if ($@ =~ /tcp timeout/) {
      service_timeout("($timeout_tcp second socket timeout reading input from client)");
    } else {
      warn "spamd: $@";
    }
    $client->close;
    return 0;
  }

  if ( !defined $_ ) {
    protocol_error("(closed before headers)");
    $client->close;
    return 0;
  }

  s/\r?\n//;

  # It might be a CHECK message, meaning that we should just check
  # if it's spam or not, then return the appropriate response.
  # If we get the PROCESS command, the client is going to send a
  # message that we need to filter.

  if (/(PROCESS|CHECK|SYMBOLS|REPORT|HEADERS|REPORT_IFSPAM) SPAMC\/(.*)/) {
    my $method = $1;
    my $version = $2;
    eval {
      Mail::SpamAssassin::Util::trap_sigalrm_fully(sub {
                          die "child processing timeout";
                        });
      alarm $timeout_child if ($timeout_child);
      check($method, $version, $start, $remote_hostname, $remote_hostaddr);
    };
    alarm 0;

    if ($@) {
      if ($@ =~ /child processing timeout/) {
        service_timeout("($timeout_child second timeout while trying to $method)");
      } else {
	warn "spamd: $@";
      }
      $client->close();
      return 0;
    }
  }

  elsif (/(TELL) SPAMC\/(.*)/) {
    my $method = $1;
    my $version = $2;
    eval {
      Mail::SpamAssassin::Util::trap_sigalrm_fully(sub {
						     die "child processing timeout";
						   });
      alarm $timeout_child if ($timeout_child);
      dotell($method, $version, $start, $remote_hostname, $remote_hostaddr);
    };
    alarm 0;

    if ($@) {
      if ($@ =~ /child processing timeout/) {
        service_timeout("($timeout_child second timeout while trying to $method)");
      } else {
	warn "spamd: $@";
      }
      $client->close();
      return 0;
    }
  }

  # Looks like a client is just seeing if we're alive or changed its mind

  elsif (/(SKIP|PING) SPAMC\/(.*)/) {
    my $method = $1;
    my $version = $2;

    if ($method eq 'SKIP') {
      # It may be a SKIP message, meaning that the client (spamc)
      # thinks it is too big to check.  So we don't do any real work
      # in that case.
      info("spamd: skipped large message in %3.1f seconds", time - $start);
    }
    doskip_or_ping($method, $version,
                   $start, $remote_hostname, $remote_hostaddr);
  }

  # If it was none of the above, then we don't know what it was.

  else {
    protocol_error($_);
  }

  # Close out our connection to the client ...
  $client->close();
  return 1;
}

sub handle_setuid_to_user {
  if ($spamtest->{paranoid}) {
    die("spamd: in paranoid mode, still running as root: closing connection");
  }
  if (!am_running_on_windows()) {
    warn("spamd: still running as root: user not specified with -u, "
         . "not found, or set to root, falling back to nobody\n");

    my ($name, $pwd, $uid, $gid, $quota, $comment, $gcos, $dir, $etc) =
        getpwnam('nobody');
  
    $) = (get_user_groups($uid));       # eGID
    $> = $uid;                          # eUID
    if (!defined($uid) || ($> != $uid and $> != ($uid - 2**32))) {
      die("spamd: setuid to nobody failed");
  }

  $spamtest->signal_user_changed(
    {
      username => $name,
      user_dir => $dir
    }
  );
  }
}

sub parse_body {
  my ($client, $expected_length, $compress_zlib, $start_time) = @_;

  my @msglines;
  my $actual_length;

  if ($compress_zlib && !defined($expected_length)) {
    service_unavailable_error("Compress requires Content-length header");
    return;
  }

  if ($compress_zlib) {
    $actual_length = zlib_inflate_read($client, $expected_length, \@msglines);
    if ($actual_length < 0) { return; }
    $expected_length = $actual_length;
  }
  else {
    @msglines = ();
    $actual_length = 0;
    while (defined($_ = $client->getline())) {
      $actual_length += length($_);
      push(@msglines, $_);    
      last if (defined $expected_length && $actual_length >= $expected_length);
    }
  }
  
  # Now parse *only* the message headers; the MIME tree won't be generated 
  # yet, it will be done on demand later on.
  my $mail = $spamtest->parse(\@msglines, 0,
                       !$timeout_child || !$start_time ? ()
                       : { master_deadline => $start_time + $timeout_child } );

  return ($mail, $actual_length);
}

sub zlib_inflate_read {
  my ($client, $expected_length, $msglinesref) = @_;
  my $out;
  my $actual_length;

  eval {
    require Compress::Zlib;
    my ($zlib, $status) = Compress::Zlib::inflateInit();
    if (!$zlib) { die "inflateInit failed: $status"; }

    my $red = 0;
    my $buf;

    # TODO: inflate in smaller buffers instead of at EOF
    while (1) {
      my $numbytes = $client->read($buf, (1024 * 64) + $red, $red);
      if (!defined $numbytes) {
        die "read of zlib data failed: $!";
        return -1;
      }
      last if $numbytes == 0;
      $red += $numbytes;
    }

    if ($red > $expected_length) {
      warn "hmm, zlib read $red > expected_length $expected_length";
      substr ($buf, $expected_length) = '';
    }

    ($out, $status) = $zlib->inflate($buf);
    if ($status != Compress::Zlib::Z_STREAM_END()) {
      die "failed to find end of zlib stream";
    }
  };

  if ($@) { 
    service_unavailable_error("zlib: $@");
    return -1;
  }

  $actual_length = length($out);

  # TODO: split during inflate, too
  # note that this preserves line endings
  @{$msglinesref} = map { my $s=$_; $s=~s/$/\n/gs; $s } split(/\n/, $out);
  return $actual_length;
}

sub parse_msgids {
  my ($mail) = @_;

  # Extract the Message-Id(s) for logging purposes.
  my $msgid  = $mail->get_pristine_header("Message-Id");
  my $rmsgid = $mail->get_pristine_header("Resent-Message-Id");
  foreach my $id ((\$msgid, \$rmsgid)) {
    if ( $$id ) {
      # no re "strict";  # since perl 5.21.8: Ranges of ASCII printables...
      while ( $$id =~ s/\([^\(\)]*\)// )
         { }                           # remove comments and
      $$id =~ s/^\s+|\s+$//g;          # leading and trailing spaces
      $$id =~ s/\s+/ /g;               # collapse whitespaces
      $$id =~ s/^.*?<(.*?)>.*$/$1/;    # keep only the id itself
      $$id =~ s/[^\x21-\x7e]/?/g;      # replace all weird chars
      $$id =~ s/[<>]/?/g;              # plus all dangling angle brackets
      $$id =~ s/^(.+)$/<$1>/;          # re-bracket the id (if not empty)
    }
  }
  return ($msgid, $rmsgid);
}

sub check {
  my ( $method, $version, $start_time, $remote_hostname, $remote_hostaddr ) = @_;
  local ($_);
  my $expected_length;
  my $compress_zlib;

  # used to ensure we don't accidentally fork (bug 4370)
  my $starting_self_pid = $$;

  # Protocol version 1.0 and greater may have "User:" and
  # "Content-length:" headers.  But they're not required.

  if ( $version > 1.0 ) {
    my $hdrs = {};

    return 0 unless (parse_headers($hdrs, $client));

    $expected_length = $hdrs->{expected_length};
    $compress_zlib = $hdrs->{compress_zlib};
  }

  return 0 unless do_user_handling();
  if ($> == 0 && !am_running_on_windows()) {
	die "spamd: still running as root! dying";
  }

  my $resp = "EX_OK";

  # generate mail object from input
  my ($mail, $actual_length) = parse_body($client, $expected_length,
                                          $compress_zlib, $start_time);
  return 0 unless defined($mail);       # error

  if ($compress_zlib) {
    $expected_length = $actual_length;  # previously it was the gzipped length
  }

  # attempt to fetch the message ids
  my ($msgid, $rmsgid) = parse_msgids($mail);

  $msgid        ||= "(unknown)";
  $current_user ||= "(unknown)";
  $current_msgid = $msgid;      # for the SIGUSR2 backtrace
  info("spamd: " . ($method eq 'PROCESS' ? "processing" : "checking")
       . " message $msgid"
       . ( $rmsgid ? " aka $rmsgid" : "" )
       . " for ${current_user}:$>");

  # Check length if we're supposed to.
  if (defined $expected_length && $actual_length != $expected_length) {
    protocol_error(
      "(Content-Length mismatch: Expected $expected_length bytes, got $actual_length bytes)"
    );
    $mail->finish();
    return 0;
  }

  # Go ahead and check the message
  $spamtest->init(1);
  my $status = Mail::SpamAssassin::PerMsgStatus->new($spamtest, $mail);
  $status->check();

  my $msg_score     =  &Mail::SpamAssassin::Util::get_tag_value_for_score($status->get_score, $status->get_required_score, $status->is_spam);
  my $msg_threshold = sprintf( "%2.1f", $status->get_required_score );

  my $response_spam_status = "";
  my $was_it_spam;
  if ( $status->is_spam ) {
    $response_spam_status = $method eq "REPORT_IFSPAM" ? "Yes" : "True";
    $was_it_spam = 'identified spam';
  }
  else {
    $response_spam_status = $method eq "REPORT_IFSPAM" ? "No" : "False";
    $was_it_spam = 'clean message';
  }

  my $spamhdr = "Spam: $response_spam_status ; $msg_score / $msg_threshold";

  if ( $method eq 'PROCESS' || $method eq 'HEADERS' ) {

    $status->set_tag('REMOTEHOSTNAME', $remote_hostname);
    $status->set_tag('REMOTEHOSTADDR', $remote_hostaddr);

    # Build the message to send back and measure it
    my $msg_resp        = $status->rewrite_mail();

    if ($method eq 'HEADERS') {
      # just the headers; delete everything after first \015\012\015\012
      $msg_resp =~ s/(\015?\012\015?\012).*$/$1/gs;
    }

    my $msg_resp_length = length($msg_resp);

    if ( $version >= 1.3 )    # Spamc protocol 1.3 means multi hdrs are OK
    {
      syswrite_full_buffer( $client, "SPAMD/1.1 $resphash{$resp} $resp\r\n" .
        "Content-length: $msg_resp_length\r\n" . $spamhdr . "\r\n\r\n" .
        $msg_resp );
    }
    elsif (
      $version >= 1.2 )    # Spamc protocol 1.2 means it accepts content-length
    {
      syswrite_full_buffer( $client, "SPAMD/1.1 $resphash{$resp} $resp\r\n" .
        "Content-length: $msg_resp_length\r\n\r\n" . $msg_resp );
    }
    else                   # Earlier than 1.2 didn't accept content-length
    {
      syswrite_full_buffer( $client, "SPAMD/1.0 $resphash{$resp} $resp\r\n" . $msg_resp );
    }
  }
  else                     # $method eq 'CHECK' et al
  {
    syswrite_full_buffer( $client, "SPAMD/1.1 $resphash{$resp} $resp\r\n" );

    if ( $method eq "CHECK" ) {
      syswrite( $client, "$spamhdr\r\n\r\n" );
    }
    else {
      my $msg_resp = '';

      if ( $method eq "REPORT"
        or ( $method eq "REPORT_IFSPAM" and $status->is_spam ) )
      {
        $msg_resp = $status->get_report;
      }
      elsif ( $method eq "REPORT_IFSPAM" ) {

        # message is ham, $msg_resp remains empty
      }
      elsif ( $method eq "SYMBOLS" ) {
        $msg_resp = $status->get_names_of_tests_hit;
        $msg_resp .= "\r\n" if ( $version < 1.3 );
      }
      else {
        die "spamd: unknown method $method";
      }

      if ( $version >= 1.3 )    # Spamc protocol > 1.2 means multi hdrs are OK
      {
        my $msg_resp_length = length($msg_resp);
        syswrite_full_buffer( $client,
                  "Content-length: $msg_resp_length\r\n" . 
                  $spamhdr . "\r\n\r\n" . $msg_resp );
      }
      else {
        syswrite_full_buffer( $client, $spamhdr . "\r\n\r\n" . $msg_resp );
      }
    }
  }

  my $scantime = sprintf( "%.1f", time - $start_time );

  info("spamd: $was_it_spam ($msg_score/$msg_threshold) for $current_user:$> in"
       . " $scantime seconds, $actual_length bytes." );

  # add a summary "result:" line, based on mass-check format
  my @extra;
  push(@extra, "scantime=".$scantime, "size=$actual_length",
            "user=".$current_user, "uid=".$>,
            "required_score=".$msg_threshold,
            "rhost=".$remote_hostname, "raddr=".$remote_hostaddr,
            "rport=".$remote_port);

  {
    # no re "strict";  # since perl 5.21.8: Ranges of ASCII printables...
    my $safe = $msgid; $safe =~ s/[\x00-\x20\s,]/_/gs; push(@extra, "mid=$safe");
  }
  if ($rmsgid) {
    # no re "strict";  # since perl 5.21.8: Ranges of ASCII printables...
    my $safe = $rmsgid; $safe =~ s/[\x00-\x20\s,]/_/gs; push(@extra, "rmid=$safe");
  }
  if (defined $status->{bayes_score}) {
    push(@extra, "bayes=".sprintf("%06f", $status->{bayes_score}));
  }
  push(@extra, "autolearn=".$status->get_autolearn_status());
  push(@extra, $status->get_spamd_result_log_items());

  my $yorn = $status->is_spam() ? 'Y' : '.';
  my $score = $status->get_score();
  my $tests = join(",", sort(grep(length,$status->get_names_of_tests_hit())));

  my $log = sprintf("spamd: result: %s %2d - %s %s", $yorn, $score,
	       $tests, join(",", @extra));
  info($log);

  # bug 3808: log scan results to any listening plugins, too
  $spamtest->call_plugins("log_scan_result", { result => $log });

  # bug 3466: handle the bayes expiry bits after the results were returned to
  # the client.  keeps clients from timing out.  if bayes_expiry_due is set,
  # then the opportunistic check has already checked.  go ahead and do another
  # sync/expire run.
  if ($status->{'bayes_expiry_due'}) {
    dbg("spamd: bayes expiry was marked as due, running post-check");
    $spamtest->rebuild_learner_caches();
    $spamtest->finish_learner();
  }

  $status->finish();    # added by jm to allow GC'ing
  $mail->finish();

  # ensure we didn't accidentally fork (bug 4370)
  if ($starting_self_pid != $$) {
    eval { warn("spamd: accidental fork: $$ != $starting_self_pid"); };
    POSIX::_exit(1);        # avoid END and dtor processing
  }

  return 1;
}

sub dotell {
  my ($method, $version, $start_time, $remote_hostname, $remote_hostaddr) = @_;
  local ($_);

  my $hdrs = {};

  return 0 unless (parse_headers($hdrs, $client));

  my $expected_length = $hdrs->{expected_length};
  my $compress_zlib = $hdrs->{compress_zlib};

  return 0 unless do_user_handling();
  if ($> == 0 && !am_running_on_windows()) {
	die "spamd: still running as root! dying";
  }

  if (!$opt{tell}) {
    service_unavailable_error("TELL commands are not enabled, set the --allow-tell switch.");
    return 0;
  }

  if ($hdrs->{set_local} && $hdrs->{remove_local}) {
    protocol_error("Unable to set local and remove local in the same operation.");
    return 0;
  }

  if ($hdrs->{set_remote} && $hdrs->{remove_remote}) {
    protocol_error("Unable to set remote and remove remote in the same operation.");
    return 0;
  }

  if ($opt{'sql-config'} && !defined($current_user)) {
    unless (handle_user_sql('nobody')) {
      service_unavailable_error("Error fetching user preferences via SQL");
      return 0;
    }
  }

  if ($opt{'ldap-config'} && !defined($current_user)) {
    handle_user_ldap('nobody');
  }

  my $resp = "EX_OK";

  # generate mail object from input
  my($mail, $actual_length) =
    parse_body($client, $expected_length, $compress_zlib, $start_time);

  return 0 unless defined($mail);       # error

  if ($compress_zlib) {
    $expected_length = $actual_length;  # previously it was the gzipped length
  }

  if ( $mail->get_header("X-Spam-Checker-Version") ) {
    my $new_mail = $spamtest->parse($spamtest->remove_spamassassin_markup($mail), 1);
    $mail->finish();
    $mail = $new_mail;
  }

  # attempt to fetch the message ids
  my ($msgid, $rmsgid) = parse_msgids($mail);

  $msgid        ||= "(unknown)";
  $current_user ||= "(unknown)";

  # Check length if we're supposed to.
  if (defined $expected_length && $actual_length != $expected_length) {
    protocol_error("(Content-Length mismatch: Expected $expected_length bytes, got $actual_length bytes)");
    $mail->finish();
    return 0;
  }

  my @did_set;
  my @did_remove;

  if ($hdrs->{set_local}) {
    my $status = $spamtest->learn($mail, undef, ($hdrs->{message_class} eq 'spam' ? 1 : 0), 0);

    push(@did_set, 'local') if ($status->did_learn());
    $status->finish();
  }

  if ($hdrs->{remove_local}) {
    my $status = $spamtest->learn($mail, undef, undef, 1);

    push(@did_remove, 'local') if ($status->did_learn());
    $status->finish();
  }

  if ($hdrs->{set_remote}) {
    require Mail::SpamAssassin::Reporter;
    my $msgrpt = Mail::SpamAssassin::Reporter->new($spamtest, $mail);

    push(@did_set, 'remote') if ($msgrpt->report());
  }

  if ($hdrs->{remove_remote}) {
    require Mail::SpamAssassin::Reporter;
    my $msgrpt = Mail::SpamAssassin::Reporter->new($spamtest, $mail);

    push(@did_remove, 'remote') if ($msgrpt->revoke());
  }

  my $hdr = "";
  my $info_str;

  if (scalar(@did_set)) {
    $hdr .= "DidSet: " . join(',', @did_set) . "\r\n";
    $info_str .= " Setting " . join(',', @did_set) . " ";
  }

  if (scalar(@did_remove)) {
    $hdr .= "DidRemove: " . join(',', @did_remove) . "\r\n";
    $info_str .= " Removing " . join(',', @did_remove) . " ";
  }

  if (!$info_str) {
    $info_str = " Did nothing ";
  }

  print $client "SPAMD/1.1 $resphash{$resp} $resp\r\n",
    $hdr . "\r\n\r\n";

  my $scantime = sprintf( "%.1f", time - $start_time );

  info("spamd: Tell:${info_str}for $current_user:$> in"
       . " $scantime seconds, $actual_length bytes");

  $mail->finish();
  return 1;
}

sub doskip_or_ping {
  my ($method, $version, $start_time, $remote_hostname, $remote_hostaddr) = @_;

  if ( $version >= 1.5 ) {
    # Spamc protocol 1.5 means client is expected to send a protocol header
    # (usually just a null header), followed by an empty line
    # Fixes Bug 6187.

    my $hdrs = {};
    return 0 unless (parse_headers($hdrs, $client));
  }

  if ($method eq 'PING') {
    print $client "SPAMD/1.5 $resphash{EX_OK} PONG\r\n";
  }

  return 1;
}

###########################################################################

sub do_user_handling {
  if ($setuid_to_user && $> == 0) {
    handle_setuid_to_user();
  }

  if ( $opt{'sql-config'} && !defined($current_user) ) {
    unless ( handle_user_sql('nobody') ) {
      service_unavailable_error("Error fetching user preferences via SQL");
      return 0;
    }
  }

  if ( $opt{'ldap-config'} && !defined($current_user) ) {
    handle_user_ldap('nobody');
  }

  dbg ("spamd: running as uid $>");
  return 1;
}

# generalised header parser.  
sub parse_headers {
  my ($hdrs, $client) = @_;

  my $got_user_header;

  # max 255 headers
  for my $hcount ( 0 .. 255 ) {
    my $line = $client->getline;

    unless (defined $line) {
      protocol_error("(EOF during headers)");
      return 0;
    }
    $line =~ s/\r\n$//;

    if (!length $line) {    # end of headers
      if (!$got_user_header && $opt{'auth-ident'}) {
        service_unavailable_error('User header required');
        return 0;
      }
      return 1;
    }

    my ($header, $value) = split (/:\s*/, $line, 2);
    unless (defined $value) {
      protocol_error("(header not in 'Name: value' format)");
      return 0;
    }

    if ($header eq 'Content-length') {
      return 0 unless got_clen_header($hdrs, $header, $value);
    }
    elsif ($header eq 'User') {
      return 0 unless got_user_header($hdrs, $header, $value);
      $got_user_header++;
    }
    elsif ($header eq 'Message-class') {
      return 0 unless got_message_class_header($hdrs, $header, $value);
    }
    elsif ($header eq 'Set') {
      return 0 unless got_set_header($hdrs, $header, $value);
    }
    elsif ($header eq 'Remove') {
      return 0 unless got_remove_header($hdrs, $header, $value);
    }
    elsif ($header eq 'Compress') {
      return 0 unless &got_compress_header($hdrs, $header, $value);
    }
  }

  # avoid too-many-headers DOS attack
  protocol_error("(too many headers)");
  return 0;
}

# We'll run handle user unless we've been told not
# to process per-user config files.  Otherwise
# we'll check and see if we need to try SQL
# lookups.  If $opt{'user-config'} is true, we need to try
# their config file and then do the SQL lookup.
# If $opt{'user-config'} IS NOT true, we skip the conf file and
# only need to do the SQL lookup if $opt{'sql-config'} IS
# true.  (I got that wrong the first time.)
#
sub got_user_header {
  my ( $client, $header, $value ) = @_;

  { # no re "strict";  # since perl 5.21.8: Ranges of ASCII printables...
    local $1;
    if ( $value !~ /^([\x20-\xFF]*)$/ ) {
      protocol_error("(User header contains control chars)");
      return 0;
    }
    $current_user = $1;
  }

  if ($opt{'auth-ident'} && !auth_ident($current_user)) {
    return 0;
  }

  if ( !$opt{'user-config'} ) {
    if ( $opt{'sql-config'} ) {
      unless ( handle_user_sql($current_user) ) {
        service_unavailable_error("Error fetching user preferences via SQL");
	return 0;
      }
    }
    elsif ( $opt{'ldap-config'} ) {
      handle_user_ldap($current_user);
    }
    elsif ( $opt{'virtual-config-dir'} ) {
      handle_virtual_config_dir($current_user);
    }
    elsif ( $opt{'setuid-with-sql'} ) {
      unless ( handle_user_setuid_with_sql($current_user) ) {
        service_unavailable_error("Error fetching user preferences via SQL");
	return 0;
      }
      $setuid_to_user = 1;    #to benefit from any paranoia.
    }
    elsif ( $opt{'setuid-with-ldap'} ) {
      handle_user_setuid_with_ldap($current_user);
      $setuid_to_user = 1;    # as above
    }
    else {
      handle_user_setuid_basic($current_user);
    }
  }
  else {
    handle_user_setuid_basic($current_user);
    if ( $opt{'sql-config'} ) {
      unless ( handle_user_sql($current_user) ) {
        service_unavailable_error("Error fetching user preferences via SQL");
	return 0;
      }
    }
  }
  return 1;
}

sub got_clen_header {
  my ( $hdrs, $header, $value ) = @_;
  if ( $value !~ /^(\d*)$/ ) {
    protocol_error("(Content-Length contains non-numeric bytes)");
    return 0;
  }
  $hdrs->{expected_length} = $1;
  return 1;
}

sub got_message_class_header {
  my ($hdrs, $header, $value) = @_;

  unless (lc($value) ne 'spam' || lc($value) ne 'ham') {
    protocol_error("(Message-class header contains invalid class)");
    return 0;
  }
  $hdrs->{message_class} = $value;

  return 1;
}

sub got_set_header {
  my ($hdrs, $header, $value) = @_;

  $hdrs->{set_local} = 0;
  $hdrs->{set_remote} = 0;

  if ($value =~ /local/i) {
    $hdrs->{set_local} = 1;
  }

  if ($value =~ /remote/i) {
    $hdrs->{set_remote} = 1;
  }

  return 1;
}

sub got_remove_header {
  my ($hdrs, $header, $value) = @_;

  $hdrs->{remove_local} = 0;
  $hdrs->{remove_remote} = 0;

  if ($value =~ /local/i) {
    $hdrs->{remove_local} = 1;
  }

  if ($value =~ /remote/i) {
    $hdrs->{remove_remote} = 1;
  }

  return 1;
}

sub got_compress_header {
  my ($hdrs, $header, $value) = @_;

  if ($value =~ /zlib/i) {
    eval { require Compress::Zlib; };
    if ($@) {
      protocol_error("(compression not supported, Compress::Zlib not installed: $@)");
      return 0;
    }
    $hdrs->{compress_zlib} = 1;
    dbg("spamd: compress header received\n");
  }
  else {
    protocol_error("(compression type not supported)");
    return 0;
  }

  return 1;
}

sub protocol_error {
  my ($err) = @_;
  my $resp = "EX_PROTOCOL";
  syswrite($client, "SPAMD/1.0 $resphash{$resp} Bad header line: $err\r\n");
  warn("spamd: bad protocol: header error: $err\n");
}

sub service_unavailable_error {
  my ($err) = @_;
  my $resp = "EX_UNAVAILABLE";
  syswrite($client,
	   "SPAMD/1.0 $resphash{$resp} Service Unavailable: $err\r\n");
  warn("spamd: service unavailable: $err\n");
}

sub service_timeout {
  my ($err) = @_;
  my $resp = "EX_TIMEOUT";
  print $client "SPAMD/1.0 $resphash{$resp} Timeout: $err\r\n";
  warn("spamd: timeout: $err\n");
}

###########################################################################

sub auth_ident {
  my $username = shift;
  my $ident_username = ident_lookup( $client, $opt{'ident-timeout'} );
  my $dn = $ident_username || 'NONE';    # display name
  dbg("ident: ident_username = $dn, spamc_username = $username\n");
  if ( !defined($ident_username) || $username ne $ident_username ) {
    info("spamd: ident username ($dn) does not match "
	 . "spamc username ($username)" );
    return 0;
  }
  return 1;
}

sub handle_user_setuid_basic {
  my $username = shift;

  # If $opt{'username'} in use, then look up userinfo for that uid;
  # otherwise use what was passed via $username
  #
  my $suidto = $username;
  if ( $opt{'username'} ) {
    $suidto = $opt{'username'};
  }
  my ($name, $pwd, $uid, $gid, $quota, $comment, $gcos, $suiddir, $etc) =
      am_running_on_windows() ? ('nobody') : getpwnam($suidto);

  if (!defined $uid) {
      my $errmsg =
        "spamd: handle_user (getpwnam) unable to find user: '$suidto'";
      die "$errmsg\n" if $spamtest->{'paranoid'};
      # if we are given a username, but can't look it up, maybe name
      # services are down?  let's break out here to allow them to get
      # 'defaults' when we are not running paranoid
      info($errmsg);
      return 0;
  }

  if ($setuid_to_user) {
    $) = (get_user_groups($uid));     # change eGID
    $> = $uid;                        # change eUID
    if ( !defined($uid) || ( $> != $uid and $> != ( $uid - 2**32 ) ) ) {
      # make it fatal to avoid security breaches
      die("spamd: fatal error: setuid to $suidto failed");
    }
    else {
      info("spamd: setuid to $suidto succeeded");
    }
  }

  my $userdir;

  # if $opt{'user-config'} is in use, read user prefs from the remote
  # username's home dir (if it exists): bug 5611
  if ( $opt{'user-config'} ) {
    my $prefsfrom = $username;  # the one passed, NOT $opt{username}

    if ($prefsfrom eq $suidto) {
      $userdir = $suiddir;  # reuse the already-looked-up info, tainted
    } elsif ( $opt{'vpopmail'} ) {
      #
      # If vpopmail config enabled then set $userdir to virtual homedir
      #
      my $username_untainted;
      $username_untainted =
        untaint_var($username)  if $username =~ /^[-:,.=+A-Za-z0-9_\@~]+\z/;
      my $vpopdir = $suiddir; # This should work with common vpopmail setups
      $userdir = `$vpopdir/bin/vuserinfo -d \Q$username_untainted\E`;
      if ($? == 0) {
        chomp($userdir);
      } else {
        $userdir = handle_user_vpopmail($username_untainted,$vpopdir);
      }
    } else {
      $userdir = (getpwnam($prefsfrom))[7];
    }

    # we *still* die if this can't be found
    if (!defined $userdir) {
        my $errmsg =
          "spamd: handle_user (userdir) unable to find user: '$prefsfrom'\n";
        die $errmsg if $spamtest->{'paranoid'};
        # if we are given a username, but can't look it up, maybe name
        # services are down?  let's break out here to allow them to get
        # 'defaults' when we are not running paranoid
        info($errmsg);
        return 0;
    }
  }

  # call this anyway, regardless of --user-config, so that
  # signal_user_changed() is called
  handle_user_set_user_prefs(untaint_var($userdir), $username);
}

sub handle_user_vpopmail {
  #
  # If vuserinfo failed $username could be an alias
  # As the alias could be an alias itself we'll try to resolve it recursively
  # Because we're mistrusting vpopmail we'll set off an alarm
  #
  my $username = shift;
  my $vpopdir = shift;
  my $userdir;
  my $vpoptimeout = 5;
  my $vptimer = Mail::SpamAssassin::Timeout->new({ secs => $vpoptimeout });

  $vptimer->run(sub {
    my $vpopusername = $username;
    my @aliases = split(/\n/, `$vpopdir/bin/valias \Q$vpopusername\E`);
    while (@aliases) {
      my $vpopusername_tainted = shift(@aliases);
      local $1;
      if ($vpopusername_tainted =~ /-> &?(.+)$/) {
        $vpopusername = untaint_var($1);
        if ($vpopusername =~ s{^(/.+)/Maildir/$}{$1}) {
          # this is the path to a real mailbox
          $userdir = $vpopusername;
        } elsif ($vpopusername !~ /^[#| \t]/ &&
                 $vpopusername =~ /^[^@ \t]+\@[^@ \t]+\s*$/) {
          # this is a forward to another e-mail address
          $vpopusername =~ s{^.+ -> (.+)}{$1};
          $vpopusername_tainted = `$vpopdir/bin/vuserinfo -d \Q$vpopusername\E`;
          if ($? == 0 && $vpopusername_tainted ne '') {
            $userdir = untaint_var($vpopusername_tainted);
          } else {
            unshift(@aliases,
                    split(/\n/, `$vpopdir/bin/valias \Q$vpopusername\E`));
          }
        }
        last if defined $userdir;
      }
    }
  });

  if ($vptimer->timed_out()) {
    dbg("spamd: timed out resolving vpopmail user/alias '%s'", $username);
    undef $userdir;
  } elsif (!defined($userdir)) {
    dbg("spamd: failed to resolve vpopmail user/alias '%s'", $username);
  } else {
    chomp($userdir);
  }
  return $userdir;
}

sub handle_user_set_user_prefs {
  my ($dir, $username) = @_;

  # don't do this if we weren't passed a directory
  if ($dir) {
    my $cf_file = $dir . "/.spamassassin/user_prefs";
    create_default_cf_if_needed( $cf_file, $username, $dir );
    $spamtest->read_scoreonly_config($cf_file);
  }

  # signal_user_changed will ignore undef user_dirs, so this is ok
  $spamtest->signal_user_changed(
    {
      username => $username,
      user_dir => $dir
    }
  );

  return 1;
}

# Handle user configs without the necessity of having individual users or a
# SQL/LDAP database.
sub handle_virtual_config_dir {
  my ($username) = @_;

  my $dir = $opt{'virtual-config-dir'};
  my $userdir;
  my $prefsfile;

  if ( defined $dir ) {
    my $safename = $username;
    $safename =~ s/[^-A-Za-z0-9\+_\.\,\@\=]/_/gs;
    my $localpart = '';
    my $domain    = '';
    if ( $safename =~ /^(.*)\@(.*)$/ ) { $localpart = $1; $domain = $2; }

    # Do userdir lookup exim-style. 
    # If a config for the full address exists, use that one
    # else look for a domain default
    if ($dir=~/%x/) {
      ($userdir=$dir)=~s/%x/${safename}/g;

      $prefsfile=$userdir.'/user_prefs';
      if (-f $prefsfile) {
        $dir = $userdir;

      } else {
        $dir =~ s/%x/${domain}/g;

        $prefsfile = $dir.'/user_prefs';
        $userdir   = $dir;
      }

    # Use the normal escaping
    } else { 
      $dir =~ s/\%u/${safename}/g;
      $dir =~ s/\%l/${localpart}/g;
      $dir =~ s/\%d/${domain}/g;
      $dir =~ s/\%\%/\%/g;

      $userdir   = $dir;
      $prefsfile = $dir . '/user_prefs';
    }

    # Log that the default configuration is being used for a user.
    info("spamd: using default config for $username: $prefsfile");
  }

  if ( -f $prefsfile ) {

    # Found a config, load it.
    $spamtest->read_scoreonly_config($prefsfile);
  }

  # assume that $userdir will be a writable directory we can
  # use for Bayes dbs etc.
  $spamtest->signal_user_changed(
    {
      username => $username,
      userstate_dir => $userdir,
      user_dir => $userdir
    }
  );
  return 1;
}

sub handle_user_sql {
  my ($username) = @_;

  unless ( $spamtest->load_scoreonly_sql($username) ) {
    return 0;
  }
  $spamtest->signal_user_changed(
    {
      username => $username,
      user_dir => undef
    }
  );
  return 1;
}

sub handle_user_ldap {
  my $username = shift;
  dbg("ldap: entering handle_user_ldap($username)");
  $spamtest->load_scoreonly_ldap($username);
  $spamtest->signal_user_changed(
    {
      username => $username,
      user_dir => undef
    }
  );
  return 1;
}

sub handle_user_setuid_with_sql {
  my $username = shift;

  # Bug 6313: interestingly, if $username is not tainted than $pwd, $gcos and
  # $etc end up tainted but other fields not;  if $username _is_ tainted,
  # getpwnam does not complain, but all returned fields are tainted (which
  # makes sense, but is worth remembering)
  #
  my ($name, $pwd, $uid, $gid, $quota, $comment, $gcos, $dir, $etc) =
      getpwnam(untaint_var($username));

  if (!$spamtest->{'paranoid'} && !defined($uid)) {
    # if we are given a username, but can't look it up, maybe name
    # services are down?  let's break out here to allow them to get
    # 'defaults' when we are not running paranoid
    info("spamd: handle_user (sql) unable to find user: $username");
    return 0;
  }

  if ($setuid_to_user) {
    $) = (get_user_groups($uid));     # change eGID
    $> = $uid;                        # change eUID
    if (!defined($uid) || ($> != $uid and $> != ($uid - 2**32))) {
      # make it fatal to avoid security breaches
      die("spamd: fatal error: setuid to $username failed");
    }
    else {
      info("spamd: setuid to $username succeeded, reading scores from SQL");
    }
  }

  my $spam_conf_dir = $dir . '/.spamassassin'; # needed for Bayes, etc.

  if ( ($opt{'user-config'} || defined $opt{'home_dir_for_helpers'})
       && ! -d $spam_conf_dir ) {
    if (mkdir $spam_conf_dir, 0700) {
      info("spamd: created $spam_conf_dir for $username");
    }
    else {
      info("spamd: failed to create $spam_conf_dir for $username");
    }
  }

  unless ($spamtest->load_scoreonly_sql($username)) {
    return 0;
  }

  $spamtest->signal_user_changed( { username => $username } );
  return 1;
}

sub handle_user_setuid_with_ldap {
  my $username = shift;
  my ($name, $pwd, $uid, $gid, $quota, $comment, $gcos, $dir, $etc) =
      getpwnam($username);

  if (!$spamtest->{'paranoid'} && !defined($uid)) {
    # if we are given a username, but can't look it up, maybe name
    # services are down?  let's break out here to allow them to get
    # 'defaults' when we are not running paranoid
    info("spamd: handle_user (ldap) unable to find user: $username");
    return 0;
  }

  if ($setuid_to_user) {
    $) = (get_user_groups($uid));    # change eGID
    $> = $uid;           # change eUID
    if (!defined($uid) || ($> != $uid and $> != ($uid - 2**32))) {
      # make it fatal to avoid security breaches
      die("spamd: fatal error: setuid to $username failed");
    }
    else {
      info("spamd: setuid to $username succeeded, reading scores from LDAP");
    }
  }

  my $spam_conf_dir = $dir . '/.spamassassin'; # needed for Bayes, etc.
  if (! -d $spam_conf_dir) {
    if (mkdir $spam_conf_dir, 0700) {
      info("spamd: created $spam_conf_dir for $username");
    }
    else {
      info("spamd: failed to create $spam_conf_dir for $username");
    }
  }

  $spamtest->load_scoreonly_ldap($username);

  $spamtest->signal_user_changed( { username => $username } );
  return 1;
}

sub create_default_cf_if_needed {
  my ( $cf_file, $username, $userdir ) = @_;

  # Parse user scores, creating default .cf if needed:
  if ( !-r $cf_file && !$spamtest->{'dont_copy_prefs'} ) {
    info("spamd: creating default_prefs: $cf_file");

    # If vpopmail config enabled then pass virtual homedir onto
    # create_default_prefs via $userdir
    $spamtest->create_default_prefs( $cf_file, $username, $userdir );

    if (! -r $cf_file) {
      info("spamd: failed to create readable default_prefs: $cf_file");
    }
  }
}

# sig handlers: parent process
sub setup_parent_sig_handlers {
  $SIG{HUP}  = \&restart_handler;
  $SIG{CHLD} = \&child_handler;
  $SIG{INT}  = \&kill_handler;
  $SIG{TERM} = \&kill_handler;
  $SIG{PIPE} = 'IGNORE';
}

# sig handlers: child processes
sub setup_child_sig_handlers {
  # note: all the signals changed in setup_parent_sig_handlers() must
  # be reset to appropriate values here!
  my $h = 'DEFAULT';
  if (am_running_on_windows()) {
    # on win32 the parent never receives SIGCHLD
    $h = sub { my($sig) = @_;
               info("spamd: child got SIG$sig, exiting");
               kill QUIT => 0;
               exit 0;
             };
  }
  $SIG{$_} = $h  foreach qw(HUP INT TERM CHLD);
  $SIG{PIPE} = 'IGNORE';
}

sub kill_handler {
  my ($sig) = @_;
  info("spamd: server killed by SIG$sig, shutting down");

  for my $socket_info (@listen_sockets) {
    next if !$socket_info;

    my $socket = $socket_info->{socket};
    $socket->close  if $socket;  # ignoring status

    my $path = $socket_info->{path};
    if (defined $path) {  # unlink a UNIX domain socket
      unlink($path) or warn "spamd: cannot unlink $path: $!\n";
    }
  }

  if (defined($opt{'pidfile'})) {
    unlink($opt{'pidfile'})
      or warn "spamd: cannot unlink $opt{'pidfile'}: $!\n";
  }

  $SIG{CHLD} = 'DEFAULT';    # we're going to kill our children
  if ($scaling) {
    $scaling->set_exiting_flag(); # don't start new ones
  }
  my $killsig = am_running_on_windows() ? 'KILL' : 'INT';
  foreach my $pid (keys %children) {
    kill($killsig, $pid)
      or info("spamd: cannot send SIG$killsig to child process [$pid]: $!");
  }
  exit 0;
}

# takes care of dead children
sub child_handler {
  my ($sig) = @_;

  # do NOT call syslog here unless the child's pid is in our list of known
  # children.  This is due to syslog-ng brokenness -- bugs 3625, 4237;
  # see also bug 6745.

  # clean up any children which have exited
  for (;;) {
    # waitpid returns a pid of the deceased process, or -1 if there is no
    # such child process. On some systems, a value of 0 indicates that there
    # are processes still running. Note that Windows uses negative pids for
    # child processes - bug 6376, bug 6356.
    #
    my $pid = waitpid(-1, WNOHANG);
    last if !$pid || $pid == -1;
    push(@children_exited, [$pid, $?, $sig, time]);
  }

  $SIG{CHLD} = \&child_handler;    # reset as necessary, should be at end
}

# takes care of dead children, as noted by a child_handler()
# called in a main program flow (not from a signal handler)
#
sub child_cleaner {
  while (@children_exited) {
    my $tuple = shift(@children_exited);
    next if !$tuple;  # just in case
    my($pid, $child_stat, $sig, $timestamp) = @$tuple;

    # ignore this child if we didn't realise we'd forked it. bug 4237
    next if !defined $children{$pid};

    # remove them from our child listing
    delete $children{$pid};

    if ($scaling) {
      $scaling->child_exited($pid);
    } else {
      my $sock = $backchannel->get_socket_for_child($pid);
      if ($sock) { $sock->close(); }
    }
    info("spamd: handled cleanup of child pid [%s]%s: %s",
         $pid, (defined $sig ? " due to SIG$sig" : ""),
         exit_status_str($child_stat,0));
  }
}

sub restart_handler {
  my ($sig) = @_;
  info("spamd: server hit by SIG$sig, restarting");

  $SIG{CHLD} = 'DEFAULT';    # we're going to kill our children
  if ($scaling) {
    $scaling->set_exiting_flag(); # don't start new ones
  }

  foreach (keys %children) {
    kill 'INT' => $_;
    my $pid = waitpid($_, 0);
    my $child_stat = $pid > 0 ? $? : undef;
    if ($scaling) {
      $scaling->child_exited($pid);
    }
    info("spamd: child [%s] killed successfully: %s",
         $pid, exit_status_str($child_stat,0));
  }
  %children = ();

  for my $socket_info (@listen_sockets) {
    next if !$socket_info;
    my $socket = $socket_info->{socket};
    next if !$socket;
    my $socket_specs = $socket_info->{specs};
    $socket->shutdown(2) if !$socket->eof;
    $socket->close;
    if ($socket->isa('IO::Socket::UNIX') && defined $socket_specs) {
      unlink($socket_specs)
        or warn "spamd: cannot unlink $socket_specs: $!\n";
    }
    info("spamd: server socket closed, type %s", ref $socket);
  }

  $got_sighup = 1;
}

sub backtrace_handler {
  Carp::cluck("spamd: caught SIGUSR2 - dumping backtrace. ".
        "most recent message: $current_msgid\n");
}

my  $serverstarted = 0;

sub serverstarted {
  $serverstarted = 1;
}

sub daemonize {
  # removed bug 7594 # Pretty command line in ps
    #$0 = join (' ', $ORIG_ARG0, @ORIG_ARGV) unless would_log("dbg");

  # be a nice daemon and chdir to the root so we don't block any
  # unmount attempts
  chdir '/' or die "spamd: cannot chdir to /: $!\n";

  # Redirect in and out to the bit bucket
  open STDIN,  "</dev/null" or die "spamd: cannot read from /dev/null: $!\n";
  open STDOUT, ">/dev/null" or die "spamd: cannot write to /dev/null: $!\n";

  # Remove the stderr logger
  Mail::SpamAssassin::Logger::remove('stderr');

  # Here we go...
  $SIG{USR1} = \&serverstarted;
  defined( my $pid = fork ) or die "spamd: cannot fork: $!\n";
  if ($pid) {
    my $child_stat;
    # Bug 6191, Bug 6258: takes almost two minutes on a slow machine
    # for a forked child process to report back, bump limit to 180 seconds
    for (my $retry=180, my $waited=0;
         $retry > 0 && !$serverstarted && $waited != $pid;
         $retry--)
    {
      warn("waitpid failed: $waited $!")  if $waited;
      sleep 1;
      $waited = waitpid($pid, WNOHANG);
      $child_stat = $?  if $waited > 0;
    }
    die sprintf("child process [%s] exited or timed out ".
                "without signaling production of a PID file: %s",
                $pid, exit_status_str($child_stat,0)) unless $serverstarted;
    exit;
  }
  delete  $SIG{USR1};
  setsid or die "spamd: cannot start new session: $!\n";

  # Now we can redirect the errors, too.
  open STDERR, '>&STDOUT' or die "spamd: cannot duplicate stdout: $!\n";

  dbg("spamd: successfully daemonized");
}

sub set_allowed_ip {
  foreach (@_) {
    my $ip = $_;
    local($1,$2);
    # strip optional square brackets
    $ip =~ s{^ \[ (.*) \] \z}{$1}xs
    || $ip =~ s{^ \[ (.*) \] ( / \d+ ) \z}{$1$2}xs;
  # dbg("spamd: set_allowed_ip %s", $ip);
    $allowed_nets->add_cidr($ip)
      or die "spamd: aborting due to add_cidr error\n";
  }
}

sub ip_is_allowed {
  $allowed_nets->contains_ip(@_);
}

sub preload_modules_with_tmp_homedir {

  # set $ENV{HOME} in a temp directory while we compile and preload everything.
  my $tmphome = secure_tmpdir();

  # If TMPDIR isn't set, File::Spec->tmpdir() called by secure_tmpdir() may set it to undefined.
  # that then breaks other things ...
  # If this is really necessary shouldn't secure_tmpdir() be doing it?
  delete $ENV{'TMPDIR'} if ( !defined $ENV{'TMPDIR'} );

  my $tmpsadir = File::Spec->catdir( $tmphome, ".spamassassin" );

  dbg("spamd: Preloading modules with HOME=$tmphome");

  if (!-d $tmphome) {
    die "spamd: cannot create temp directory $tmphome: $!";
  }

  # bug 5379: spamd won't start if the temp preloading dir exists; check if exists and remove it
  # This check should be unnecessary now that $tmphome created using File::Temp, but leave it just in case
  if (-d $tmpsadir) {
    rmdir( $tmpsadir ) or die "spamd: $tmpsadir not empty: $!";
  }
  mkdir( $tmpsadir, 0700 ) or die "spamd: cannot create $tmpsadir: $!";
  $ENV{HOME} = $tmphome;

  $spamtest->compile_now(0,1);  # ensure all modules etc. are loaded
  $/ = "\n";                    # argh, Razor resets this!  Bad Razor!

  # now clean up the stuff we just created, and make us taint-safe
  delete $ENV{HOME};

  # bug 2015, bug 2223: rmpath() is not taint safe, so we've got to implement
  # our own poor man's rmpath. If it fails, we report only the first error.
  my $err;
  foreach my $d ( ( $tmpsadir, $tmphome ) ) {
    opendir( TMPDIR, $d ) or $err ||= "open $d: $!";
    unless ($err) {
      foreach my $f ( File::Spec->no_upwards( readdir(TMPDIR) ) ) {
        $f = untaint_file_path( File::Spec->catfile( $d, $f ) );
        unlink($f) or $err ||= "remove $f: $!";
      }
      closedir(TMPDIR) or $err ||= "close $d: $!";
    }
    rmdir($d) or $err ||= "remove $d: $!";
  }

  # If the dir still exists, log a warning.
  if ( -d $tmphome ) {
    $err ||= "do something: $!";
    warn "spamd: failed to remove $tmphome: could not $err\n";
  }
}

# Keep calling syswrite until the entire buffer is written out
# Retry if EAGAIN/EWOULDBLOCK or when partial buffer is written
# Limit the number of retries to keep the execution time bounded
sub syswrite_full_buffer {
  my ($sock, $buf, $numretries) = @_;
  $numretries ||= 10;       # default 10 retries
  my $length = length($buf);
  my $written = 0;
  my $try = 0;

  while (($try < $numretries) && ($length > $written)) {
      my $nbytes = syswrite($sock, $buf, $length - $written, $written);
      if (!defined $nbytes) {
	  unless ((exists &Errno::EAGAIN && $! == &Errno::EAGAIN)
		  || (exists &Errno::EWOULDBLOCK && $! == &Errno::EWOULDBLOCK))
	  {
	      # an error that wasn't non-blocking I/O-related.  that's serious
	      return;
	  }
	  # errcode says to try again
      }
      else {

	  if ($nbytes == 0) {
	      return $written;  # return early if no error but nothing was written
	  }

	  $written += $nbytes;
      }
      $try++;
  }

  return $written;      # it's complete, we can return
}

sub map_server_sockets {

  $server_select_mask = '';
  for my $socket_info (@listen_sockets) {
    next if !$socket_info;
    my $fd = $socket_info->{fd};
    vec($server_select_mask, $fd, 1) = 1  if defined $fd;
  }
  dbg("spamd: server listen sockets fd bit field: %s",
      unpack('b*', $server_select_mask));

  my $back_selector = $server_select_mask;
  $backchannel->set_selector(\$back_selector);
}

# do this in advance, since we want to minimize work when SIGHUP
# is received
my $perl_from_hashbang_line;
sub prepare_for_sighup_restart {
  # it'd be great if we could introspect the interpreter to figure this
  # out, but bizarrely it seems unavailable.
  if (open (IN, "<$ORIG_ARG0")) {
    my $l = <IN>;
    close IN;
    if ($l && $l =~ /^#!\s*(\S+)\s*.*?$/) {
      $perl_from_hashbang_line = $1;
    }
  }
}

sub do_sighup_restart {
  if (defined($opt{'pidfile'})) {
    unlink($opt{'pidfile'}) || warn "spamd: cannot unlink $opt{'pidfile'}: $!\n";
  }

  # leave Client fds active, and do not kill children; they can still
  # service clients until they exit.  But restart the listener anyway.
  # And close the logfile, so the new instance can reopen it.
  Mail::SpamAssassin::Logger::close_log();
  chdir($ORIG_CWD)
    or die "spamd: restart failed: chdir failed: ${ORIG_CWD}: $!\n";

  # ensure we re-run spamd using the right perl interpreter, and
  # with the right switches (taint mode and warnings) (bug 5255)
  my $perl = untaint_var($^X);
  my @execs = ( $perl, "-T", "-w", $ORIG_ARG0, @ORIG_ARGV );

  if ($perl eq $perl_from_hashbang_line) {
    # we're using the same perl as the script uses on the #! line;
    # we can safely just exec the script
    @execs = ( $ORIG_ARG0, @ORIG_ARGV );
  }

  warn "spamd: restarting using '" . join (' ', @execs) . "'\n";
  exec @execs;

  # should not get past that...
  die "spamd: restart failed: exec failed: " . join (' ', @execs) . ": $!\n";
}

__DATA__

=head1 NAME

spamd - daemonized version of spamassassin

=head1 SYNOPSIS

spamd [options]

Options:

 -l, --allow-tell                  Allow learning/reporting
 -c, --create-prefs                Create user preferences files
 -C path, --configpath=path        Path for default config files
 --siteconfigpath=path             Path for site configs
 --cf='config line'                Additional line of configuration
 -d, --daemonize                   Daemonize
 -h, --help                        Print usage message
 -i [ip_or_name[:port]], --listen=[ip_or_name[:port]] Listen on IP addr and port
 -p port, --port=port              Listen on specified port, may be overridden by -i
 -4, --ipv4-only, --ipv4           Use IPv4 where applicable, disables IPv6
 -6                                Use IPv6 where applicable, disables IPv4
 -A host,..., --allowed-ips=..,..  Restrict to IP addresses which can connect
 -m num, --max-children=num        Allow maximum num children
 --min-children=num                Allow minimum num children
 --min-spare=num                   Lower limit for number of spare children
 --max-spare=num                   Upper limit for number of spare children
 --max-conn-per-child=num	   Maximum connections accepted by child 
                                   before it is respawned
 --round-robin                     Use traditional prefork algorithm
 --timeout-tcp=secs                Connection timeout for client headers
 --timeout-child=secs              Connection timeout for message checks
 -q, --sql-config                  Enable SQL config (needs -x)
 -Q, --setuid-with-sql             Enable SQL config (needs -x,
                                   enables use of -H)
 --ldap-config                     Enable LDAP config (needs -x)
 --setuid-with-ldap                Enable LDAP config (needs -x,
                                   enables use of -H)
 --virtual-config-dir=dir          Enable pattern based Virtual configs
                                   (needs -x)
 -r pidfile, --pidfile             Write the process id to pidfile
 -s facility, --syslog=facility    Specify the syslog facility
 --syslog-socket=type              How to connect to syslogd
 --log-timestamp-fmt=fmt           strftime(3) format for timestamps, may be
                                   empty to disable timestamps, or 'default'
 -u username, --username=username  Run as username
 -g groupname, --groupname=groupname  Run as groupname
 -v, --vpopmail                    Enable vpopmail config
 -x, --nouser-config               Disable user config files
 --auth-ident                      Use ident to identify spamc user (deprecated)
 --ident-timeout=timeout           Timeout for ident connections
 -D, --debug[=areas]               Print debugging messages (for areas)
 -L, --local                       Use local tests only (no DNS)
 -P, --paranoid                    Die upon user errors
 -H [dir], --helper-home-dir[=dir] Specify a different HOME directory
 --ssl                             Enable SSL on TCP connections
 --ssl-port port                   Override --port setting for SSL connections
 --server-key keyfile              Specify an SSL keyfile
 --server-cert certfile            Specify an SSL certificate
 --socketpath=path                 Listen on a given UNIX domain socket
 --socketowner=name                Set UNIX domain socket file's owner
 --socketgroup=name                Set UNIX domain socket file's group
 --socketmode=mode                 Set UNIX domain socket file's mode
 --timing                          Enable timing and logging
 -V, --version                     Print version and exit

The --listen option (or -i) may be specified multiple times, its syntax
is: [ ssl: ] [ host-name-or-IP-address ] [ : port ]  or an absolute path
(filename) of a Unix socket.  If port is omitted it defaults to --port or
to 783.  Option --ssl implies a prefix 'ssl:'.  An IPv6 address should be
enclosed in square brackets, e.g. [::1]:783, an IPv4 address may be but
need not be enclosed in square brackets.  An asterisk '*' in place of a
hostname implies an unspecified address, ('0.0.0.0' or '::'), i.e. it
binds to all interfaces. An empty option value implies '*'. A default
is '--listen localhost', which binds to a loopback interface only.


=head1 DESCRIPTION

The purpose of this program is to provide a daemonized version of the
spamassassin executable.  The goal is improving throughput performance for
automated mail checking.

This is intended to be used alongside C<spamc>, a fast, low-overhead C client
program.

See the README file in the C<spamd> directory of the SpamAssassin distribution
for more details.

Note: Although C<spamd> will check per-user config files for every message, any
changes to the system-wide config files will require either restarting spamd
or forcing it to reload itself via B<SIGHUP> for the changes to take effect.

Note: If C<spamd> receives a B<SIGHUP>, it internally reloads itself, which
means that it will change its pid and might not restart at all if its
environment changed  (ie. if it can't change back into its own directory).  If
you plan to use B<SIGHUP>, you should always start C<spamd> with the B<-r>
switch to know its current pid.

=head1 OPTIONS

Options of the long form can be shortened as long as they remain
unambiguous.  (i.e. B<--dae> can be used instead of B<--daemonize>)
Also, boolean options (like B<--user-config>) can be negated by
adding I<no> (B<--nouser-config>), however, this is usually unnecessary.

=over 4

=item B<-l>, B<--allow-tell>

Allow learning and forgetting (to a local Bayes database), reporting
and revoking (to a remote database) by spamd. The client issues a TELL
command to tell what type of message is being processed and whether
local (learn/forget) or remote (report/revoke) databases should be
updated.

Note that spamd always trusts the username passed in (unless
B<--auth-ident> is used) so clients could maliciously learn messages
for other users. (This is not ususally a concern with an SQL Bayes
store as users will typically have read-write access directly to the
database, and can also use C<sa-learn> with the B<-u> option to
achieve the same result.)

=item B<-c>, B<--create-prefs>

Create user preferences files if they don't exist (default: don't).

=item B<-C> I<path>, B<--configpath>=I<path>

Use the specified path for locating the distributed configuration files.
Ignore the default directories (usually C</usr/share/spamassassin> or similar).

=item B<--siteconfigpath>=I<path>

Use the specified path for locating site-specific configuration files.  Ignore
the default directories (usually C</etc/spamassassin> or similar).

=item B<--cf='config line'>

Add additional lines of configuration directly from the command-line, parsed
after the configuration files are read.   Multiple B<--cf> arguments can be
used, and each will be considered a separate line of configuration.

=item B<-d>, B<--daemonize>

Detach from starting process and run in background (daemonize).

=item B<-h>, B<--help>

Print a brief help message, then exit without further action.

=item B<-V>, B<--version>

Print version information, then exit without further action.

=item B<-i> [I<ipaddress>[:<port>]], B<--listen>[=I<ipaddress>[:<port>]]

Additional alias names for this option are --listen-ip and --ip-address.
Tells spamd to listen on the specified IP address, defaults to a loopback
interface, i.e. C<--listen localhost>).  If no value is specified after the
switch, or if an asterisk '*' stands in place of an <ipaddress>, spamd will
listen on all interfaces - this is equivalent to address '0.0.0.0' for IPv4
and to '::' for IPv6. You can also use a valid hostname which will make spamd
listen on all addresses that a name resolves to. The option may be specified
multiple times. See also options -4 and -6 for restricting address family
to IPv4 or to IPv6. If a port is specified it overrides for this socket the
global --port (and --ssl-port) setting. An IPv6 addresses should be enclosed
in square brackets, e.g. [::1]:783. For compatibility square brackets on an
IPv6 address may be omitted if a port number specification is also omitted.

=item B<-p> I<port>, B<--port>=I<port>

Optionally specifies the port number for the server to listen on (default: 783).

If the B<--ssl> switch is used, and B<--ssl-port> is not supplied, then this
port will be used to accept SSL connections instead of unencrypted connections.
If the B<--ssl> switch is used, and B<--ssl-port> is set, then unencrypted
connections will be accepted on the B<--port> at the same time as encrypted
connections are accepted at B<--ssl-port>.

=item B<-q>, B<--sql-config>

Turn on SQL lookups even when per-user config files have been disabled
with B<-x>. this is useful for spamd hosts which don't have user's
home directories but do want to load user preferences from an SQL
database.

If your spamc client does not support sending the C<User:> header,
like C<exiscan>, then the SQL username used will always be B<nobody>.

This inhibits the setuid() behavior, so the C<-u> option is
required. If you want the setuid() behaviour, use C<-Q> or
C<--setuid-with-sql> instead.

=item B<--ldap-config>

Turn on LDAP lookups. This is completely analog to C<--sql-config>,
only it is using an LDAP server.

Like C<--sql-config>, this disables the setuid behavior, and requires
C<-u>. If you want it, use C<--setuid-with-ldap> instead.

=item B<-Q>, B<--setuid-with-sql>

Turn on SQL lookups even when per-user config files have been disabled
with B<-x> and also setuid to the user.  This is useful for spamd hosts
which want to load user preferences from an SQL database but also wish to
support the use of B<-H> (Helper home directories.)

=item B<--setuid-with-ldap>

Turn on LDAP lookups even when per-user config files have been disabled
with B<-x> and also setuid to the user.  This is again completely analog
to C<--setuid-with-sql>, only it is using an LDAP server.

=item B<--virtual-config-dir>=I<pattern>

This option specifies where per-user preferences can be found for virtual
users, for the B<-x> switch. The I<pattern> is used as a base pattern for the
directory name.  Any of the following escapes can be used:

=over 4

=item %u -- replaced with the full name of the current user, as sent by spamc.

=item %l -- replaced with the 'local part' of the current username.  In other
words, if the username is an email address, this is the part before the C<@>
sign.

=item %d -- replaced with the 'domain' of the current username.  In other
words, if the username is an email address, this is the part after the C<@>
sign.

=item %x -- replaced with the full name of the current user, as sent by spamc.
If the resulting config directory does not exist, replace with the domain part 
to use a domain-wide default.   

=item %% -- replaced with a single percent sign (%).

=back

So for example, if C</vhome/users/%u/spamassassin> is specified, and spamc
sends a virtual username of C<jm@example.com>, the directory
C</vhome/users/jm@example.com/spamassassin> will be used.

The set of characters allowed in the virtual username for this path are
restricted to:

	A-Z a-z 0-9 - + _ . , @ =

All others will be replaced by underscores (C<_>).

This path must be a writable directory.  It will be created if it does not
already exist.  If a file called B<user_prefs> exists in this directory (note:
B<not> in a C<.spamassassin> subdirectory!), it will be loaded as the user's
preferences.  The Bayes databases for that user will be stored in this directory.

Note that this B<requires> that B<-x> is used, and cannot be combined with
SQL- or LDAP-based configuration.

The pattern B<must> expand to an absolute directory when spamd is running
daemonized (B<-d>).

Currently, use of this without B<-u> is not supported. This inhibits setuid.

=item B<-r> I<pidfile>, B<--pidfile>=I<pidfile>

Write the process ID of the spamd parent to the file specified by I<pidfile>.
The file will be unlinked when the parent exits.  Note that when running
with the B<-u> option, the file must be writable by that user.

=item B<-v>, B<--vpopmail>

Enable vpopmail config.  If specified with with B<-u> set to the vpopmail user,
this allows spamd to lookup/create user_prefs in the vpopmail user's own
maildir.  This option is useful for vpopmail virtual users who do not have an
entry in the system /etc/passwd file.

Currently, use of this without B<-u> is not supported. This inhibits setuid.

=item B<-s> I<facility>, B<--syslog>=I<facility>

Specify the syslog facility to use (default: mail).  If C<stderr> is specified,
output will be written to stderr. (This is useful if you're running C<spamd>
under the C<daemontools> package.) With a I<facility> of C<file>, all output
goes to spamd.log. I<facility> is interpreted as a file name to log to if it
contains any characters except a-z and 0-9. C<null> disables logging completely
(used internally).

Examples:
	spamd -s mail                 # use syslog, facility mail (default)
	spamd -s ./mail               # log to file ./mail
	spamd -s stderr 2>/dev/null   # log to stderr, throw messages away
	spamd -s null                 # the same as above
	spamd -s file                 # log to file ./spamd.log
	spamd -s /var/log/spamd.log   # log to file /var/log/spamd.log

If logging to a file is enabled and that log file is rotated, the spamd server
must be restarted with a SIGHUP. (If the log file is just truncated, this is
not needed but still recommended.)

Note that logging to a file does not use locking, so you cannot intermix
logging from spamd and other processes into the same file.  If you want
to mix logging like this, use syslog instead.

If you use syslog logging, it is essential to send a SIGHUP to the spamd daemon
when you restart the syslogd daemon.  (This is due to a shortcoming in Perl's
syslog handling, where the disappearance of the connection to the syslogd is
considered a fatal error.)

=item B<--syslog-socket>=I<type>

Specify how spamd should send messages to syslogd. The I<type> can be any
of the socket types or logging mechanisms as accepted by the subroutine
Sys::Syslog::setlogsock(). Depending on a version of Sys::Syslog and on the
underlying operating system, one of the following values (or their subset) can
be used: C<native>, C<eventlog>, C<tcp>, C<udp>, C<inet>, C<unix>, C<stream>,
C<pipe>, or C<console>.  The value C<eventlog> is specific to Win32 events
logger and requires a perl module Win32::EventLog to be installed.
For more information please consult the Sys::Syslog documentation.

A historical setting --syslog-socket=none is mapped to --syslog=stderr.

A default for Windows platforms is C<none>, otherwise the default is
to try C<unix> first, falling back to C<inet> if perl detects errors
in its C<unix> support.

Some platforms, or versions of perl, are shipped with old or dysfunctional
versions of the B<Sys::Syslog> module which do not support some socket types,
so you may need to set this option explicitly.  If you get error messages
regarding B<__PATH_LOG> or similar spamd, try changing this setting.

The socket types C<file> is used internally and should not be specified.
Use the C<-s> switch instead.

=item B<--log-timestamp-fmt>=I<format>

The --log-timestamp-fmt option can provide a POSIX strftime(3) format for
timestamps included in each logged message. Each logger (stderr, file,
syslog) has its own default value for a timestamp format, which applies when
--log-timestamp-fmt option is not given, or with --log-timestamp-fmt=default .
Timestamps can be turned off by specifying an empty string with this
option, e.g. --log-timestamp-fmt='' or just --log-timestamp-fmt= .
Typical use: --log-timestamp-fmt='%a %b %e %H:%M:%S %Y' (provides
localized weekday and month names in the ctime(3) style),
or '%a, %e %b %Y %H:%M:%S %z (%Z)' for a RFC 2822 format,
or maybe '%Y-%m-%d %H:%M:%S%z' for an ISO 8601 (EN 28601) format,
or just '%Y%m%dT%H%M%S' .

=item B<-u> I<username>, B<--username>=I<username>

Run as the named user.  If this option is not set, the default behaviour
is to setuid() to the user running C<spamc>, if C<spamd> is running
as root.

Note: "--username=root" is not a valid option.  If specified, C<spamd> will
exit with a fatal error on startup.

=item B<-g> I<groupname>, B<--groupname>=I<groupname>

Run as the named group if --username is being used. If this option is
not set when --username is used then the primary group for the user
given to --username is used.

=item B<-x>, B<--nouser-config>, B<--user-config>

Turn off (on) reading of per-user configuration files (user_prefs) from the
user's home directory.  The default behaviour is to read per-user
configuration from the user's home directory (B<--user-config>).

This option does not disable or otherwise influence the SQL, LDAP or
Virtual Config Dir settings.

=item B<--auth-ident>

Verify the username provided by spamc using ident.  This is only
useful if connections are only allowed from trusted hosts (because an
identd that lies is trivial to create) and if spamc REALLY SHOULD be
running as the user it represents.  Connections are terminated
immediately if authentication fails.  In this case, spamc will pass
the mail through unchecked.  Failure to connect to an ident server,
and response timeouts are considered authentication failures.  This
requires that Net::Ident be installed. Deprecated.

=item B<--ident-timeout>=I<timeout>

Wait at most I<timeout> seconds for a response to ident queries.
Ident query that takes longer that I<timeout> seconds will fail, and
mail will not be processed.  Setting this to 0.0 or less results in no
timeout, which is STRONGLY discouraged.  The default is 5 seconds.

=item B<-A> I<host,...>, B<--allowed-ips>=I<host,...>

Specify a comma-separated list of authorized hosts or networks which
can connect to this spamd instance. Each element of the list is either a
single IP addresses, or a range of IP addresses in address/masklength CIDR
notation, or ranges of IPv4 addresses by specifying 3 or less octets with
a trailing dot.  Hostnames are not supported, only IPv4 or IPv6 addresses.
This option can be specified multiple times, or can take a list of addresses
separated by commas.  IPv6 addresses may be (but need not be) enclosed
in square brackets for consistency with option B<--listen>.  Examples:

B<-A 10.11.12.13> -- only allow connections from C<10.11.12.13>.

B<-A 10.11.12.13,10.11.12.14> -- only allow connections from C<10.11.12.13> and
C<10.11.12.14>.

B<-A 10.200.300.0/24> -- allow connections from any machine in the range
C<10.200.300.*>.

B<-A 10.> -- allow connections from any machine in the range C<10.*.*.*>.

B<-A [2001:db8::]/32,192.0.2.0/24,::1,127.0.0.0/8> -- only accept
connections from specified test networks and from localhost.

In absence of the B<-A> option, connections are only accepted from
IP address 127.0.0.1 or ::1, i.e. from localhost on a loopback interface.

=item B<-D> [I<area,...>], B<--debug> [I<area,...>]

Produce debugging output. If no areas are listed, all debugging information is
printed. Diagnostic output can also be enabled for each area individually;
I<area> is the area of the code to instrument. For example, to produce
diagnostic output on bayes, learn, and dns, use:

        spamassassin -D bayes,learn,dns

Higher priority informational messages that are suitable for logging in normal
circumstances are available with an area of "info".

For more information about which areas (also known as channels) are available,
please see the documentation at:

	C<http://wiki.apache.org/spamassassin/DebugChannels>

=item B<-4>, B<--ipv4only>, B<--ipv4-only>, B<--ipv4>

Use IPv4 where applicable, do not use IPv6.
The option affects a set of listen sockets (see option C<--listen>)
and disables IPv6 for DNS tests.

=item B<-6>

Use IPv6 where applicable, do not use IPv4.
The option affects a set of listen sockets (see option C<--listen>)
and disables IPv4 for DNS tests. Installing a module IO::Socket::IP
is recommended if spamd is expected to receive requests over IPv6.

=item B<-L>, B<--local>

Perform only local tests on all mail.  In other words, skip DNS and other
network tests.  Works the same as the C<-L> flag to C<spamassassin(1)>.

=item B<-P>, B<--paranoid>

Die on user errors (for the user passed from spamc) instead of falling back to
user I<nobody> and using the default configuration.

=item B<-m> I<number> , B<--max-children>=I<number>

This option specifies the maximum number of children to spawn.
Spamd will spawn that number of children, then sleep in the background
until a child dies, wherein it will go and spawn a new child.

Incoming connections can still occur if all of the children are busy,
however those connections will be queued waiting for a free child.
The minimum value is C<1>, the default value is C<5>.

Please note that there is a OS specific maximum of connections that can be
queued (Try C<perl -MSocket -e'print SOMAXCONN'> to find this maximum).

Note that if you run too many servers for the amount of free RAM available, you
run the danger of hurting performance by causing a high swap load as server
processes are swapped in and out continually.

=item B<--min-children>=I<number>

The minimum number of children that will be kept running.  The minimum value is
C<1>, the default value is C<1>.  If you have lots of free RAM, you may want to
increase this.

=item B<--min-spare>=I<number>

The lower limit for the number of spare children allowed to run.  A
spare, or idle, child is one that is not handling a scan request.   If
there are too few spare children available, a new server will be started
every second or so.  The default value is C<1>.

=item B<--max-spare>=I<number>

The upper limit for the number of spare children allowed to run.  If there
are too many spare children, one will be killed every second or so until
the number of idle children is in the desired range.  The default value
is C<2>.

=item B<--max-conn-per-child>=I<number>

This option specifies the maximum number of connections each child
should process before dying and letting the master spamd process spawn
a new child.  The minimum value is C<1>, the default value is C<200>.

=item B<--round-robin>

By default, C<spamd> will attempt to keep a small number of "hot" child
processes as busy as possible, and keep any others as idle as possible, using
something similar to the Apache httpd server scaling algorithm.  This is
accomplished by the master process coordinating the activities of the children.
This switch will disable this scaling algorithm, and the behaviour seen in
the 3.0.x versions will be used instead, where all processes receive an
equal load and no scaling takes place.

=item B<--timeout-tcp>=I<number>

This option specifies the number of seconds to wait for headers from a
client (spamc) before closing the connection.  The minimum value is C<1>, 
the default value is C<30>, and a value of C<0> will disable socket
timeouts completely.

=item B<--timeout-child>=I<number>

This option specifies the number of seconds to wait for a spamd child to
process or check a message.  The minimum value is C<1>, the default 
value is C<300>, and a value of C<0> will disable child timeouts completely.

=item B<-H> I<directory>, B<--helper-home-dir>=I<directory>

Specify that external programs such as Razor, DCC, and Pyzor should have
a HOME environment variable set to a specific directory.  The default
is to use the HOME environment variable setting from the shell running
spamd.  By specifying no argument, spamd will use the spamc caller's
home directory instead.

=item B<--ssl>

Accept only SSL connections on the associated port.
The B<IO::Socket::SSL> perl module must be installed.

If the B<--ssl> switch is used, and B<--ssl-port> is not supplied, then
B<--port> port will be used to accept SSL connections instead of unencrypted
connections.  If the B<--ssl> switch is used, and B<--ssl-port> is set, then
unencrypted connections will be accepted on the B<--port>, at the same time as
encrypted connections are accepted at B<--ssl-port>.

=item B<--ssl-port>=I<port>

Optionally specifies the port number for the server to listen on for
SSL connections (default: whatever --port uses).  See B<--ssl> for
more details.

=item B<--server-key> I<keyfile>

Specify the SSL key file to use for SSL connections.

=item B<--server-cert> I<certfile>

Specify the SSL certificate file to use for SSL connections.

=item B<--socketpath> I<pathname>

Listen on a UNIX domain socket at path I<pathname>, in addition to
sockets specified with a C<--listen> option. This option is provided
for compatibility with older versions of spamd. Starting with version
3.4.0 the C<--listen> option can also take a UNIX domain socket as its
value (an absolute path name). Unlike C<--socketpath>, the C<--listen>
option may be specified multiple times if spamd needs to listen on
multiple UNIX or INET or INET6 sockets.

Warning: the Perl support on BSD platforms for UNIX domain sockets seems to
have a bug regarding paths of over 100 bytes or so (SpamAssassin bug 4380).
If you see a 'could not find newly-created UNIX socket' error message, and
the path appears truncated, this may be the cause.  Try using a shorter path
to the socket.

By default, use of B<--socketpath> without B<--listen> will inhibit
SSL connections and unencrypted TCP connections.  To add other sockets,
specify them with B<--listen>, e.g. '--listen=:' or '--listen=*:'

=item B<--socketowner> I<name>

Set UNIX domain socket to be owned by the user named I<name>.  Note
that this requires that spamd be started as C<root>, and if C<-u>
is used, that user should have write permissions to unlink the file
later, for when the C<spamd> server is killed.

=item B<--socketgroup> I<name>

Set UNIX domain socket to be owned by the group named I<name>.  See
C<--socketowner> for notes on ownership and permissions.

=item B<--socketmode> I<mode>

Set UNIX domain socket to use the octal mode I<mode>.  Note that if C<-u> is
used, that user should have write permissions to unlink the file later, for
when the C<spamd> server is killed.


=item B<--timing>

  Enable timing measurements and output the information for logging.  This
  is the same information as provided by the TIMING tag.

=back

=head1 SEE ALSO

spamc(1)
spamassassin(1)
Mail::SpamAssassin::Conf(3)
Mail::SpamAssassin(3)

=head1 PREREQUISITES

C<Mail::SpamAssassin>

=head1 AUTHORS

The SpamAssassin(tm) Project (http://spamassassin.apache.org/)

=head1 LICENSE

SpamAssassin is distributed under the Apache License, Version 2.0, as
described in the file C<LICENSE> included with the distribution.

=cut