This file is indexed.

/usr/bin/fixproc is in snmp 5.7.3+dfsg-1.7+deb9u1.

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
#!/usr/bin/perl
# 
# fixproc [-min n] [-max n] [-check | -kill | -restart | -exist | -fix] proc ...
# 
# fixproc exit code:
# 	0	ok
# 	1	check failed
# 	2	cannot restart
# 	3	cannot kill
# 	4	fix failed	if fix is defined as kill or restart, then
# 				cannot kill or cannot restart is return instead
# 	10	fixproc error
# 
#
# Fixes a process named "proc" by performing the specified action.  The
# actions can be check, kill, restart, exist, or fix.  The action is specified
# on the command line or is read from a default database, which describes
# the default action to take for each process.  The database format and
# the meaning of each action are described below.
# 
# database format
# ---------------
# 
# name	foo			required
# cmd	/a/b/name args		required
# min	number			optional, defaults to 1
# max	number			optional, defaults to 1
# 
# check	{null, exist, shell}	optional, defaults to exist if not defined
# [shell command		shell commands needed only if check=shell
#  ...
#  shell command
#  end_shell]			keyword end_shell marks end of shell commands
# fix	{kill, restart, shell}	required
# [shell command			shell commands needed only if fix=shell
#  ...
#  shell command
#  end_shell]			keyword end_shell marks end of shell commands
# 
# Blank lines and lines beginning with "#" are ignored.
# 
#
# Example:
# 
# name	test1
# cmd	nice /home/kong/z/test1 > /dev/null &
# max	2
# fix	shell
# 	xterm&
# 	nice /home/kong/z/test1 > /dev/null &
# 	end_shell
# 
# 
# actions
# -------
# There are 5 possible actions:  kill, restart, fix, exist, check.  Fix is
# defined to be the kill action, the restart action, or a series of shell
# commands.  Check is optionally defined in the database.  If check is not
# defined, it defaults to exist.
# 
# If the action is specified on the cmd line, it is executed regardless of
# check.  The commands executed for each action type is as follow:
# 
#   switch action:
# 	kill:
# 	  kill process, wait 5 seconds, kill -9 if still exist
# 	  if still exist
# 	    return "cannot kill"
# 	  else
# 	    return "ok"
# 
# 	restart:	
# 	  execute kill
# 	  if kill returned "cannot kill"
# 	    return "cannot kill"
# 	  restart by issuing cmd to shell
# 	  if check defined
# 	    execute check
# 	    if check succeeds
# 	      return "ok"
# 	    else
# 	      return "cannot restart"
# 
# 	fix:
# 	  if fix=kill
# 	    execute kill
# 	  else if fix=restart
# 	    execute restart
# 	  else
# 	    execute shell commands
# 	    execute check
# 
# 	check:
# 	  if check defined as null
# 	    return "fixproc error"
# 	  else
# 	    execute check
# 	    if check succeeds
# 	      return (execute exist)
# 	    return "check failed"
# 
# 	exist:
# 	  if proc exists in ps && (min <= num. of processes <= max)
# 	    return "ok"
# 	  else
# 	    return "check failed"
# 
# 
# If the action is not specified on the cmd line, the default action is the
# fix action defined in the database.  Fix is only executed if check fails:
# 
# 	if fix defined
# 	  if check is not defined as null
# 	    execute check
# 	    if check succeeds
# 	      return "ok"
# 	  execute action defined for fix  
# 	else
# 	  return "fixproc error"
# 
# 
# If proc is not specified on the command line, return "fixproc error." 
# Multiple proc's can be defined on the cmd line.   When an error occurs
# when multiple proc's are specified, the first error encountered halts the
# script.
# 
# For check shell scripts, any non-zero exit code means the check has failed.
#
#
# Timothy Kong		3/1995

use File::Temp qw(tempfile);

$database_file = '/local/etc/fixproc.conf';

$debug = 0;			# specify debug level using -dN
				# currently defined: -d1

$no_error = 0;
$check_failed_error = 1;
$cannot_restart_error = 2;
$cannot_kill_error = 3;
$cannot_fix_error = 4;
$fixproc_error = 10;

$min = 1;
$max = 1;
$cmd_line_action = '';
%min = ();
%max = ();
%cmd = ();
%check = ();
%fix = ();
$shell_lines = ();
@proc_list = ();

$shell_header = "#!/bin/sh\n";
$shell_end_marker = 'shell_end_marker';

&read_args();
&read_database();
# &dump_database();		# debug only

# change the default min. and max. number of processes allowed
if ($min != 1)
  {
    for $name ( keys (%min) )
      {
	$min{$name} = $min;
      }
  }
if ($max != 1)
  {
    for $name ( keys (%max) )
      {
	$max{$name} = $max;
      }
  }
    
# work on one process at a time
for $proc ( @proc_list )
  {
    $error_code = &work_on_proc ($proc);

############# uncomment next line when fully working ############
#    exit $error_code if ($error_code);

    die "error_code = $error_code\n" if ($error_code);
  }


# create an executable shell script file
sub create_sh_script
{
  local ($file) = pop (@_);
  local ($fh) = pop (@_);
  local ($i) = pop (@_);

  printf (STDERR "create_sh_script\n") if ($debug > 0);

  $! = $fixproc_error;
  while ( $shell_lines[$i] ne $shell_end_marker )
    {
      printf ($fh "%s", $shell_lines[$i]);
      $i++;
    }
  close ($fh);
  chmod 0755, $file;
}


sub do_fix
{
  local ($proc) = pop(@_);

  printf (STDERR "do_fix\n") if ($debug > 0);

  if ($fix{$proc} eq '')
    {
      $! = $fixproc_error;
      die "$0: internal error 4\n";
    }
  if ($fix{$proc} eq 'kill')
    {
      return &do_kill ($proc);
    }
  elsif ($fix{$proc} eq 'restart')
    {
      return &do_restart ($proc);
    }
  else
    {
      # it must be "shell", so execute the shell script defined in database
      local ($tmpfh, $tmpfile) = tempfile("fix_XXXXXXXX", DIR => "/tmp");

      &create_sh_script ($fix{$proc}, $tmpfh, $tmpfile);

      	# return code is number divided by 256
      $error_code = (system "$tmpfile") / 256;
      unlink($tmpfile);
      return ($fix_failed_error) if ($error_code != 0);
        # sleep needed here?
      return &do_exist ($proc);
    }
}


sub do_check
{
  local ($proc) = pop(@_);

  printf (STDERR "do_check\n") if ($debug > 0);

  if ($check{$proc} eq '')
    {
      $! = $fixproc_error;
      die "$0: internal error 2\n";
    }

  if ($check{$proc} ne 'exist')
    {
      # if not "exist", then it must be "shell", so execute the shell script
      # defined in database

      local ($tmpfh, $tmpfile) = tempfile("check_XXXXXXXX", DIR => "/tmp");

      &create_sh_script ($fix{$proc}, $tmpfh, $tmpfile);

      	# return code is number divided by 256
      $error_code = (system "$tmpfile") / 256;
      unlink($tmpfile);
      return ($check_failed_error) if ($error_code != 0);

      # check passed, continue
    }
  return &do_exist ($proc);
}


sub do_exist
{
  local ($proc) = pop(@_);

  printf (STDERR "do_exist\n") if ($debug > 0);

  # do ps, check to see if min <= no. of processes <= max
  $! = $fixproc_error;
  open (COMMAND, "/bin/ps -e | /bin/grep $proc | /bin/wc -l |")
    || die "$0: can't run ps-grep-wc command\n";
  $proc_count = <COMMAND>;
  if (($proc_count < $min{$proc}) || ($proc_count > $max{$proc}))
    {
      return $check_failed_error;
    }
  return $no_error;
}


sub do_kill
{
  local ($proc) = pop(@_);
  local ($second_kill_needed);

  printf (STDERR "do_kill\n") if ($debug > 0);

  # first try kill
  $! = $fixproc_error;
  open (COMMAND, "/bin/ps -e | /bin/grep $proc |")
    || die "$0: can't run ps-grep-awk command\n";
  while (<COMMAND>)
    {
      # match the first field of ps -e
      $! = $fixproc_error;
      /^\s*(\d+)\s/ || die "$0: can't match ps -e output\n";
      system "kill $1";
    }

  # if process still exist, try kill -9
  sleep 2;
  $! = $fixproc_error;
  open (COMMAND, "/bin/ps -e | /bin/grep $proc |")
    || die "$0: can't run ps-grep-awk command\n";
  $second_kill_needed = 0;
  while (<COMMAND>)
    {
      # match the first field of ps -e
      $! = $fixproc_error;
      /^\s*(\d+)\s/ || die "$0: can't match ps -e output\n";
      system "kill -9 $1";
      $second_kill_needed = 1;
    }
  return ($no_error) if ($second_kill_needed == 0);

  # see if kill -9 worked
  sleep 2;
  $! = $fixproc_error;
  open (COMMAND, "/bin/ps -e | /bin/grep $proc |")
    || die "$0: can't run ps-grep-awk command\n";
  while (<COMMAND>)
    {				# a process still exist, return error
      return $cannot_kill_error;
    }
  return $no_error;		# good, all dead
}


sub do_restart
{
  local ($proc) = pop(@_);
  local ($error_code);

  printf (STDERR "do_restart\n") if ($debug > 0);

  $error_code = &do_kill ($proc);
  return $error_code if ($error_code != $no_error);
  die "$0: internal error 3\n" if ($cmd{$proc} eq '');
  system "$cmd{$proc}";
  # sleep needed here?
  if ($check{$proc} ne 'null')
    {
      return $no_error if (&do_check($proc) == $no_error);
      return $cannot_restart_error;
    }
}


sub work_on_proc
{
  local ($proc) = pop(@_);
  local ($error_code);

  printf (STDERR "work_on_proc\n") if ($debug > 0);

  if ($cmd_line_action eq '')
    {
      # perform action from database

      if ($check{$proc} ne 'null')
	{
	  $error_code = &do_check ($proc);
	  if ($error_code != $check_failed_error)
	    {
	      return $error_code;
	    }
	}
      return &do_fix ($proc);
    }
  else
    {
      # perform action from command line

      $error_code = $no_error;
      if ($cmd_line_action eq 'kill')
	{
	  $error_code = &do_kill ($proc);
	}
      elsif ($cmd_line_action eq 'restart')
	{
	  $error_code = &do_restart ($proc);
	}
      elsif ($cmd_line_action eq 'fix')
	{
	  $error_code = &do_fix ($proc);
	}
      elsif ($cmd_line_action eq 'check')
	{
	  if ( $check{$proc} eq 'null' )
	    {
	      exit $fixproc_error;
	    }
	  $error_code = &do_check ($proc);
	}
      elsif ($cmd_line_action eq 'exist')
	{
	  $error_code = &do_exist ($proc);
	}
      else
	{
	  $! = $fixproc_error;
	  die "$0: internal error 1\n";
	}
    }
}


sub dump_database
{
  local ($name);

  for $name (keys(%cmd))
    {
      printf ("name\t%s\n", $name);
      printf ("cmd\t%s\n", $cmd{$name});
      printf ("min\t%s\n", $min{$name});
      printf ("max\t%s\n", $max{$name});
      if ( $check{$name} =~ /[0-9]+/ )
	{
	  printf ("check\tshell\n");
	  $i = $check{$name};
	  while ( $shell_lines[$i] ne $shell_end_marker )
	    {
	      printf ("%s", $shell_lines[$i]);
	      $i++;
	    }
	}
      else
	{
	  printf ("check\t%s\n", $check{$name});
	}
      if ( $fix{$name} =~ /[0-9]+/ )
	{
	  printf ("fix\tshell\n");
	  $i = $fix{$name};
	  while ( $shell_lines[$i] ne $shell_end_marker )
	    {
	      printf ("%s", $shell_lines[$i]);
	      $i++;
	    }
	}
      else
	{
	  printf ("fix\t%s\n", $fix{$name});
	}
      printf ("\n");
    }
}


sub read_database
{
  local ($in_check_shell_lines) = 0;
  local ($in_fix_shell_lines) = 0;
  local ($name) = '';
  local ($str1);
  local ($str2);

  $! = $fixproc_error;
  open (DB, $database_file) || die 'cannot open database file $database_file\n';
  while (<DB>)
    {
      if ((! /\S/) || (/^[ \t]*#.*$/))
	{
		# ignore blank lines or lines beginning with "#"
	}
      elsif ($in_check_shell_lines)
	{
	  if ( /^\s*end_shell\s*$/ )
	    {
	      $in_check_shell_lines = 0;
	      push (@shell_lines, $shell_end_marker);
	    }
	  else
	    {
	      push (@shell_lines, $_);
	    }
	}
      elsif ($in_fix_shell_lines)
	{
	  if ( /^\s*end_shell\s*$/ )
	    {
	      $in_fix_shell_lines = 0;
	      push (@shell_lines, $shell_end_marker);
	    }
	  else
	    {
	      push (@shell_lines, $_);
	    }
	}
      else
	{
	  if ( ! /^\s*(\S+)\s+(\S.*)\s*$/ )
	    {
	      $! = $fixproc_error;
	      die "$0: syntax error in database\n$_";
	    }
	  $str1 = $1;
	  $str2 = $2;
	  if ($str1 eq 'name')
	    {
	      &finish_db_entry($name);
	      $name = $str2;
	    }
	  elsif ($str1 eq 'cmd')
	    {
	      $! = $fixproc_error;
	      die "$0: cmd specified before name in database\n$_\n"
	        if ($name eq '');
	      die "$0: cmd specified multiple times for $name in database\n"
		if ($cmd{$name} ne '');
	      $cmd{$name} = $str2;
	    }
	  elsif ($str1 eq 'min')
	    {
	      $! = $fixproc_error;
	      die "$0: min specified before name in database\n$_\n"
	        if ($name eq '');
	      die "$0: min specified multiple times in database\n$_\n"
		if ($min{$name} ne '');
	      die "$0: non-numeric min value in database\n$_\n"
		if ( ! ($str2 =~ /[0-9]+/ ));
	      $min{$name} = $str2;
	    }
	  elsif ($str1 eq 'max')
	    {
	      $! = $fixproc_error;
	      die "$0: max specified before name in database\n$_\n"
	        if ($name eq '');
	      die "$0: max specified multiple times in database\n$_\n"
		if ($max{$name} ne '');
	      die "$0: non-numeric max value in database\n$_\n"
		if ( ! ($str2 =~ /[0-9]+/ ));
	      $max{$name} = $str2;
	    }
	  elsif ($str1 eq 'check')
	    {
	      $! = $fixproc_error;
	      die "$0: check specified before name in database\n$_\n"
	        if ($name eq '');
	      die "$0: check specified multiple times in database\n$_\n"
		if ($check{$name} ne '');
	      if ( $str2 eq 'shell' )
		{
		  # if $check{$name} is a number, it is a pointer into
		  # $shell_lines[] where the shell commands are kept
		  $shell_lines[$#shell_lines+1] = $shell_header;
		  $check{$name} = $#shell_lines;
		  $in_check_shell_lines = 1;
		}
	      else
		{
		  $check{$name} = $str2;
		}
	    }
	  elsif ($str1 eq 'fix')
	    {
	      $! = $fixproc_error;
	      die "$0: fix specified before name in database\n$_\n"
	        if ($name eq '');
	      die "$0: fix specified multiple times in database\n$_\n"
		if ($fix{$name} ne '');
	      if ( $str2 eq 'shell' )
		{
		  # if $fix{$name} is a number, it is a pointer into
		  # $shell_lines[] where the shell commands are kept
		  $shell_lines[$#shell_lines+1] = $shell_header;
		  $fix{$name} = $#shell_lines;
		  $in_fix_shell_lines = 1;
		}
	      else
		{
		  $fix{$name} = $str2;
		}
	    }
	}
    }
  &finish_db_entry($name);
}


sub finish_db_entry
{
  local ($name) = pop(@_);

  if ($name ne '')
    {
      $! = $fixproc_error;
      die "$0: fix not defined for $name in database\n"
	if ($fix{$name} eq '');
      die "$0: cmd not defined for $name in database\n"
	if ($cmd{$name} eq '');
      $check{$name} = 'exist' if ($check{$name} eq '');
      $max{$name} = 1 if ($max{$name} eq '');
      $min{$name} = 1 if ($min{$name} eq '');
    }
}


sub read_args
{
  local ($i) = 0;
  local ($arg);
  local ($action_arg_count) = 0;

  while ( $i <= $#ARGV )
    {
      $arg = $ARGV[$i];
      if (($arg eq '-min') || ($arg eq '-max'))
	{
	  if (($i == $#ARGV - 1) || ($ARGV[$i+1] =~ /\D/))  # \D is non-numeric
	    {
	      $! = $fixproc_error;
	      die "$0: numeric arg missing after -min or -max\n";
	    }
	  if ($arg eq '-min')
	    {
	      $min = $ARGV[$i+1];
	    }
	  else
	    {
	      $max = $ARGV[$i+1];
	    }
	  $i += 2;
	}
      elsif ($arg eq '-kill')
	{
	  $cmd_line_action = 'kill';
	  $action_arg_count++;
	  $i++;
	}
      elsif ($arg eq '-check')
	{
	  $cmd_line_action = 'check';
	  $action_arg_count++;
	  $i++;
	}
      elsif ($arg eq '-restart')
	{
	  $cmd_line_action = 'restart';
	  $action_arg_count++;
	  $i++;
	}
      elsif ($arg eq '-exist')
	{
	  $cmd_line_action = 'exist';
	  $action_arg_count++;
	  $i++;
	}
      elsif ($arg eq '-fix')
	{
	  $cmd_line_action = 'fix';
	  $action_arg_count++;
	  $i++;
	}
      elsif ($arg =~ /-d(\d)$/)
	{
	  $debug = $1;
	  $i++;
	}
      elsif ($arg =~ /^-/)
	{
	  $! = $fixproc_error;
	  die "$0: unknown switch $arg\n";
	}
      else
	{
	  push (@proc_list, $arg);
	  $i++;
	}
    }
    $! = $fixproc_error;
    die "$0: no process specified\n" if ($#proc_list == -1);
    die "$0: more than one action specified\n" if ($action_arg_count > 1);
  }