This file is indexed.

/usr/bin/mysqld_safe is in percona-server-server-5.6 5.6.22-rel71.0-0ubuntu4.

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
#!/bin/sh
# Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
# This file is public domain and comes with NO WARRANTY of any kind
#
# Script to start the MySQL daemon and restart it if it dies unexpectedly
#
# This should be executed in the MySQL base directory if you are using a
# binary installation that is not installed in its compile-time default
# location
#
# mysql.server works by first doing a cd to the base directory and from there
# executing mysqld_safe

# Initialize script globals
KILL_MYSQLD=1;
MYSQLD=
niceness=0
mysqld_ld_preload=
mysqld_ld_library_path=
load_jemalloc=1
flush_caches=0
numa_interleave=0

# Initial logging status: error log is not open, and not using syslog
logging=init
want_syslog=0
syslog_tag=
user='mysql'
pid_file=
err_log=

syslog_tag_mysqld=mysqld
syslog_tag_mysqld_safe=mysqld_safe

# MySQL-specific environment variable. First off, it's not really a umask,
# it's the desired mode. Second, it follows umask(2), not umask(3) in that
# octal needs to be explicit. Our shell might be a proper sh without printf,
# multiple-base arithmetic, and binary arithmetic, so this will get ugly.
# We reject decimal values to keep things at least half-sane.
umask 007                               # fallback
UMASK="${UMASK-0640}"
fmode=`echo "$UMASK" | sed -e 's/[^0246]//g'`
octalp=`echo "$fmode"|cut -c1`
fmlen=`echo "$fmode"|wc -c|sed -e 's/ //g'`
if [ "x$octalp" != "x0" -o "x$UMASK" != "x$fmode" -o "x$fmlen" != "x5" ]
then
  fmode=0640
  echo "UMASK must be a 3-digit mode with an additional leading 0 to indicate octal." >&2
  echo "The first digit will be corrected to 6, the others may be 0, 2, 4, or 6." >&2
fi
fmode=`echo "$fmode"|cut -c3-4`
fmode="6$fmode"
if [ "x$UMASK" != "x0$fmode" ]
then
  echo "UMASK corrected from $UMASK to 0$fmode ..."
fi

defaults=
case "$1" in
    --no-defaults|--defaults-file=*|--defaults-extra-file=*)
      defaults="$1"; shift
      ;;
esac

usage () {
        cat <<EOF
Usage: $0 [OPTIONS]
  --no-defaults              Don't read the system defaults file
  --defaults-file=FILE       Use the specified defaults file
  --defaults-extra-file=FILE Also use defaults from the specified file
  --ledir=DIRECTORY          Look for mysqld in the specified directory
  --open-files-limit=LIMIT   Limit the number of open files
  --core-file-size=LIMIT     Limit core files to the specified size
  --timezone=TZ              Set the system timezone
  --malloc-lib=LIB           Preload shared library LIB if available
  --mysqld=FILE              Use the specified file as mysqld
  --mysqld-version=VERSION   Use "mysqld-VERSION" as mysqld
  --nice=NICE                Set the scheduling priority of mysqld
  --plugin-dir=DIR           Plugins are under DIR or DIR/VERSION, if
                             VERSION is given
  --skip-kill-mysqld         Don't try to kill stray mysqld processes
  --syslog                   Log messages to syslog with 'logger'
  --skip-syslog              Log messages to error log (default)
  --syslog-tag=TAG           Pass -t "mysqld-TAG" to 'logger'
  --flush-caches             Flush and purge buffers/caches before
                             starting the server
  --numa-interleave          Run mysqld with its memory interleaved
                             on all NUMA nodes

All other options are passed to the mysqld program.

EOF
        exit 1
}

my_which ()
{
  save_ifs="${IFS-UNSET}"
  IFS=:
  ret=0
  for file
  do
    for dir in $PATH
    do
      if [ -f "$dir/$file" ]
      then
        echo "$dir/$file"
        continue 2
      fi
    done

	ret=1  #signal an error
	break
  done

  if [ "$save_ifs" = UNSET ]
  then
    unset IFS
  else
    IFS="$save_ifs"
  fi
  return $ret  # Success
}

log_generic () {
  priority="$1"
  shift

  msg="`date +'%y%m%d %H:%M:%S'` mysqld_safe $*"
  echo "$msg"
  case $logging in
    init) ;;  # Just echo the message, don't save it anywhere
    file) echo "$msg" >> "$err_log" ;;
    syslog) logger -t "$syslog_tag_mysqld_safe" -p "$priority" "$*" ;;
    *)
      echo "Internal program error (non-fatal):" \
           " unknown logging method '$logging'" >&2
      ;;
  esac
}

log_error () {
  log_generic daemon.error "$@" >&2
}

log_notice () {
  log_generic daemon.notice "$@"
}

eval_log_error () {
  cmd="$1"
  case $logging in
    file) cmd="$cmd >> "`shell_quote_string "$err_log"`" 2>&1" ;;
    syslog)
      # mysqld often prefixes its messages with a timestamp, which is
      # redundant when logging to syslog (which adds its own timestamp)
      # However, we don't strip the timestamp with sed here, because
      # sed buffers output (only GNU sed supports a -u (unbuffered) option)
      # which means that messages may not get sent to syslog until the
      # mysqld process quits.
      cmd="$cmd 2>&1 | logger -t '$syslog_tag_mysqld' -p daemon.error & wait"
      ;;
    *)
      echo "Internal program error (non-fatal):" \
           " unknown logging method '$logging'" >&2
      ;;
  esac

  #echo "Running mysqld: [$cmd]"
  eval "$cmd"
}

shell_quote_string() {
  # This sed command makes sure that any special chars are quoted,
  # so the arg gets passed exactly to the server.
  echo "$1" | sed -e 's,\([^a-zA-Z0-9/_.=-]\),\\\1,g'
}

parse_arguments() {
  # We only need to pass arguments through to the server if we don't
  # handle them here.  So, we collect unrecognized options (passed on
  # the command line) into the args variable.
  pick_args=
  if test "$1" = PICK-ARGS-FROM-ARGV
  then
    pick_args=1
    shift
  fi

  for arg do
    # the parameter after "=", or the whole $arg if no match
    val=`echo "$arg" | sed -e 's;^--[^=]*=;;'`
    # what's before "=", or the whole $arg if no match
    optname=`echo "$arg" | sed -e 's/^\(--[^=]*\)=.*$/\1/'`
    # replace "_" by "-" ; mysqld_safe must accept "_" like mysqld does.
    optname_subst=`echo "$optname" | sed 's/_/-/g'`
    arg=`echo $arg | sed "s/^$optname/$optname_subst/"`
    case "$arg" in
      # these get passed explicitly to mysqld
      --basedir=*) MY_BASEDIR_VERSION="$val" ;;
      --datadir=*) DATADIR="$val" ;;
      --pid-file=*) pid_file="$val" ;;
      --plugin-dir=*) PLUGIN_DIR="$val" ;;
      --user=*) user="$val"; SET_USER=1 ;;

      # these might have been set in a [mysqld_safe] section of my.cnf
      # they are added to mysqld command line to override settings from my.cnf
      --log-error=*) err_log="$val" ;;
      --port=*) mysql_tcp_port="$val" ;;
      --socket=*) mysql_unix_port="$val" ;;

      # mysqld_safe-specific options - must be set in my.cnf ([mysqld_safe])!
      --core-file-size=*) core_file_size="$val" ;;
      --ledir=*) ledir="$val" ;;
      --malloc-lib=*)
	set_malloc_lib "$val"
	load_jemalloc=0
	;;
      --mysqld=*) MYSQLD="$val" ;;
      --mysqld-version=*)
        if test -n "$val"
        then
          MYSQLD="mysqld-$val"
          PLUGIN_VARIANT="/$val"
        else
          MYSQLD="mysqld"
        fi
        ;;
      --nice=*) niceness="$val" ;;
      --open-files-limit=*) open_files="$val" ;;
      --open_files_limit=*) open_files="$val" ;;
      --skip-kill-mysqld*) KILL_MYSQLD=0 ;;
      --syslog) want_syslog=1 ;;
      --skip-syslog) want_syslog=0 ;;
      --syslog-tag=*) syslog_tag="$val" ;;
      --timezone=*) TZ="$val"; export TZ; ;;
      --flush-caches=*) flush_caches="$val" ;;
      --numa-interleave=*) numa_interleave="$val" ;;

      --help) usage ;;

      *)
        if test -n "$pick_args"
        then
          append_arg_to_args "$arg"
        fi
        ;;
    esac
  done
}


# Add a single shared library to the list of libraries which will be added to
# LD_PRELOAD for mysqld
#
# Since LD_PRELOAD is a space-separated value (for historical reasons), if a
# shared lib's path contains spaces, that path will be prepended to
# LD_LIBRARY_PATH and stripped from the lib value.
add_mysqld_ld_preload() {
  lib_to_add="$1"
  log_notice "Adding '$lib_to_add' to LD_PRELOAD for mysqld"

  case "$lib_to_add" in
    *' '*)
      # Must strip path from lib, and add it to LD_LIBRARY_PATH
      lib_file=`basename "$lib_to_add"`
      case "$lib_file" in
        *' '*)
          # The lib file itself has a space in its name, and can't
          # be used in LD_PRELOAD
          log_error "library name '$lib_to_add' contains spaces and can not be used with LD_PRELOAD"
          exit 1
          ;;
      esac
      lib_path=`dirname "$lib_to_add"`
      lib_to_add="$lib_file"
      [ -n "$mysqld_ld_library_path" ] && mysqld_ld_library_path="$mysqld_ld_library_path:"
      mysqld_ld_library_path="$mysqld_ld_library_path$lib_path"
      ;;
  esac

  # LD_PRELOAD is a space-separated
  [ -n "$mysqld_ld_preload" ] && mysqld_ld_preload="$mysqld_ld_preload "
  mysqld_ld_preload="${mysqld_ld_preload}$lib_to_add"
}


# Returns LD_PRELOAD (and LD_LIBRARY_PATH, if needed) text, quoted to be
# suitable for use in the eval that calls mysqld.
#
# All values in mysqld_ld_preload are prepended to LD_PRELOAD.
mysqld_ld_preload_text() {
  text=

  if [ -n "$mysqld_ld_preload" ]; then
    new_text="$mysqld_ld_preload"
    [ -n "$LD_PRELOAD" ] && new_text="$new_text $LD_PRELOAD"
    text="${text}LD_PRELOAD="`shell_quote_string "$new_text"`' '
  fi

  if [ -n "$mysqld_ld_library_path" ]; then
    new_text="$mysqld_ld_library_path"
    [ -n "$LD_LIBRARY_PATH" ] && new_text="$new_text:$LD_LIBRARY_PATH"
    text="${text}LD_LIBRARY_PATH="`shell_quote_string "$new_text"`' '
  fi

  echo "$text"
}


mysql_config=
get_mysql_config() {
  if [ -z "$mysql_config" ]; then
    mysql_config=`echo "$0" | sed 's,/[^/][^/]*$,/mysql_config,'`
    if [ ! -x "$mysql_config" ]; then
      log_error "Can not run mysql_config $@ from '$mysql_config'"
      exit 1
    fi
  fi

  "$mysql_config" "$@"
}


# set_malloc_lib LIB
# - If LIB is empty, do nothing and return
# - If LIB is 'tcmalloc', look for tcmalloc shared library in /usr/lib
#   then pkglibdir.  tcmalloc is part of the Google perftools project.
# - If LIB is an absolute path, assume it is a malloc shared library
#
# Put LIB in mysqld_ld_preload, which will be added to LD_PRELOAD when
# running mysqld.  See ld.so for details.
set_malloc_lib() {
  malloc_lib="$1"

  if [ "$malloc_lib" = tcmalloc ]; then
    pkglibdir=`get_mysql_config --variable=pkglibdir`
    malloc_lib=
    # This list is kept intentionally simple.  Simply set --malloc-lib
    # to a full path if another location is desired.
    for libdir in /usr/lib "$pkglibdir" "$pkglibdir/mysql"; do
      for flavor in _minimal '' _and_profiler _debug; do
        tmp="$libdir/libtcmalloc$flavor.so"
        #log_notice "DEBUG: Checking for malloc lib '$tmp'"
        [ -r "$tmp" ] || continue
        malloc_lib="$tmp"
        break 2
      done
    done

    if [ -z "$malloc_lib" ]; then
      log_error "no shared library for --malloc-lib=tcmalloc found in /usr/lib or $pkglibdir"
      exit 1
    fi
  fi

  # Allow --malloc-lib='' to override other settings
  [ -z  "$malloc_lib" ] && return

  case "$malloc_lib" in
    /*)
      if [ ! -r "$malloc_lib" ]; then
        log_error "--malloc-lib '$malloc_lib' can not be read and will not be used"
        exit 1
      fi
      ;;
    *)
      log_error "--malloc-lib must be an absolute path or 'tcmalloc'; " \
        "ignoring value '$malloc_lib'"
      exit 1
      ;;
  esac

  add_mysqld_ld_preload "$malloc_lib"
}


#
# First, try to find BASEDIR and ledir (where mysqld is)
#

if echo '/usr/share/mysql' | grep '^/usr' > /dev/null
then
  relpkgdata=`echo '/usr/share/mysql' | sed -e 's,^/usr,,' -e 's,^/,,' -e 's,^,./,'`
else
  # pkgdatadir is not relative to prefix
  relpkgdata='/usr/share/mysql'
fi

MY_PWD=`pwd`
# Check for the directories we would expect from a binary release install
if test -n "$MY_BASEDIR_VERSION" -a -d "$MY_BASEDIR_VERSION"
then
  # BASEDIR is already overridden on command line.  Do not re-set.

  # Use BASEDIR to discover le.
  if test -x "$MY_BASEDIR_VERSION/libexec/mysqld"
  then
    ledir="$MY_BASEDIR_VERSION/libexec"
  elif test -x "$MY_BASEDIR_VERSION/sbin/mysqld"
  then
    ledir="$MY_BASEDIR_VERSION/sbin"
  else
    ledir="$MY_BASEDIR_VERSION/bin"
  fi
elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/bin/mysqld"
then
  MY_BASEDIR_VERSION="$MY_PWD"		# Where bin, share and data are
  ledir="$MY_PWD/bin"			# Where mysqld is
# Check for the directories we would expect from a source install
elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/libexec/mysqld"
then
  MY_BASEDIR_VERSION="$MY_PWD"		# Where libexec, share and var are
  ledir="$MY_PWD/libexec"		# Where mysqld is
elif test -f "$relpkgdata"/english/errmsg.sys -a -x "$MY_PWD/sbin/mysqld"
then
  MY_BASEDIR_VERSION="$MY_PWD"		# Where sbin, share and var are
  ledir="$MY_PWD/sbin"			# Where mysqld is
# Since we didn't find anything, used the compiled-in defaults
else
  MY_BASEDIR_VERSION='/usr'
  ledir='/usr/sbin'
fi


#
# Second, try to find the data directory
#

# Try where the binary installs put it
if test -d $MY_BASEDIR_VERSION/data/mysql
then
  DATADIR=$MY_BASEDIR_VERSION/data
  if test -z "$defaults" -a -r "$DATADIR/my.cnf"
  then
    defaults="--defaults-extra-file=$DATADIR/my.cnf"
  fi
# Next try where the source installs put it
elif test -d $MY_BASEDIR_VERSION/var/mysql
then
  DATADIR=$MY_BASEDIR_VERSION/var
# Or just give up and use our compiled-in default
else
  DATADIR=/var/lib/mysql
fi

if test -z "$MYSQL_HOME"
then 
  if test -r "$MY_BASEDIR_VERSION/my.cnf" && test -r "$DATADIR/my.cnf"
  then
    log_error "WARNING: Found two instances of my.cnf -
$MY_BASEDIR_VERSION/my.cnf and
$DATADIR/my.cnf
IGNORING $DATADIR/my.cnf"

    MYSQL_HOME=$MY_BASEDIR_VERSION
  elif test -r "$DATADIR/my.cnf"
  then
    log_error "WARNING: Found $DATADIR/my.cnf
The data directory is a deprecated location for my.cnf, please move it to
$MY_BASEDIR_VERSION/my.cnf"
    MYSQL_HOME=$DATADIR
  else
    MYSQL_HOME=$MY_BASEDIR_VERSION
  fi
fi
export MYSQL_HOME


# Get first arguments from the my.cnf file, groups [mysqld] and [mysqld_safe]
# and then merge with the command line arguments
if test -x "$MY_BASEDIR_VERSION/bin/my_print_defaults"
then
  print_defaults="$MY_BASEDIR_VERSION/bin/my_print_defaults"
elif test -x `dirname $0`/my_print_defaults
then
  print_defaults="`dirname $0`/my_print_defaults"
elif test -x ./bin/my_print_defaults
then
  print_defaults="./bin/my_print_defaults"
elif test -x /usr/bin/my_print_defaults
then
  print_defaults="/usr/bin/my_print_defaults"
elif test -x /usr/bin/mysql_print_defaults
then
  print_defaults="/usr/bin/mysql_print_defaults"
else
  print_defaults="my_print_defaults"
fi

append_arg_to_args () {
  args="$args "`shell_quote_string "$1"`
}

args=

SET_USER=2
parse_arguments `$print_defaults $defaults --loose-verbose mysqld server`
if test $SET_USER -eq 2
then
  SET_USER=0
fi

parse_arguments `$print_defaults $defaults --loose-verbose mysqld_safe safe_mysqld`
parse_arguments PICK-ARGS-FROM-ARGV "$@"

#
# Add jemalloc to ld_preload if no other malloc forced - needed for TokuDB
#
if test $load_jemalloc -eq 1
then
  for libjemall in "/usr/lib64" "/usr/lib/x86_64-linux-gnu" "/usr/lib"; do
    if [ -r "$libjemall/libjemalloc.so.1" ]; then
      add_mysqld_ld_preload "$libjemall/libjemalloc.so.1"
      break
    fi  
  done
fi

#
# Try to find the plugin directory
#

# Use user-supplied argument
if [ -n "${PLUGIN_DIR}" ]; then
  plugin_dir="${PLUGIN_DIR}"
else
  # Try to find plugin dir relative to basedir
  for dir in lib/mysql/plugin lib/plugin
  do
    if [ -d "${MY_BASEDIR_VERSION}/${dir}" ]; then
      plugin_dir="${MY_BASEDIR_VERSION}/${dir}"
      break
    fi
  done
  # Give up and use compiled-in default
  if [ -z "${plugin_dir}" ]; then
    plugin_dir='/usr/lib/mysql/plugin'
  fi
fi
plugin_dir="${plugin_dir}${PLUGIN_VARIANT}"

# Determine what logging facility to use

# Ensure that 'logger' exists, if it's requested
if [ $want_syslog -eq 1 ]
then
  my_which logger > /dev/null 2>&1
  if [ $? -ne 0 ]
  then
    log_error "--syslog requested, but no 'logger' program found.  Please ensure that 'logger' is in your PATH, or do not specify the --syslog option to mysqld_safe."
    exit 1
  fi
fi

if [ -n "$err_log" -o $want_syslog -eq 0 ]
then
  if [ -n "$err_log" ]
  then
    # mysqld adds ".err" if there is no extension on the --log-error
    # argument; must match that here, or mysqld_safe will write to a
    # different log file than mysqld

    # mysqld does not add ".err" to "--log-error=foo."; it considers a
    # trailing "." as an extension
    
    if expr "$err_log" : '.*\.[^/]*$' > /dev/null
    then
        :
    else
      err_log="$err_log".err
    fi

    case "$err_log" in
      /* ) ;;
      * ) err_log="$DATADIR/$err_log" ;;
    esac
  else
    err_log=$DATADIR/`hostname`.err
  fi

  append_arg_to_args "--log-error=$err_log"

  if [ $want_syslog -eq 1 ]
  then
    # User explicitly asked for syslog, so warn that it isn't used
    log_error "Can't log to error log and syslog at the same time.  Remove all --log-error configuration options for --syslog to take effect."
  fi

  # Log to err_log file
  log_notice "Logging to '$err_log'."
  logging=file

  if [ ! -f "$err_log" ]; then                  # if error log already exists,
    touch "$err_log"                            # we just append. otherwise,
    chmod "$fmode" "$err_log"                   # fix the permissions here!
  fi

else
  if [ -n "$syslog_tag" ]
  then
    # Sanitize the syslog tag
    syslog_tag=`echo "$syslog_tag" | sed -e 's/[^a-zA-Z0-9_-]/_/g'`
    syslog_tag_mysqld_safe="${syslog_tag_mysqld_safe}-$syslog_tag"
    syslog_tag_mysqld="${syslog_tag_mysqld}-$syslog_tag"
  fi
  log_notice "Logging to syslog."
  logging=syslog
fi

USER_OPTION=""
if test -w / -o "$USER" = "root"
then
  if test "$user" != "root" -o $SET_USER = 1
  then
    USER_OPTION="--user=$user"
  fi
  # Change the err log to the right user, if it is in use
  if [ $want_syslog -eq 0 ]; then
    touch "$err_log"
    chown $user "$err_log"
  fi
  if test -n "$open_files"
  then
    ulimit -n $open_files
  fi
fi

if test -n "$open_files"
then
  append_arg_to_args "--open-files-limit=$open_files"
fi

safe_mysql_unix_port=${mysql_unix_port:-${MYSQL_UNIX_PORT:-/var/run/mysqld/mysqld.sock}}
# Make sure that directory for $safe_mysql_unix_port exists
mysql_unix_port_dir=`dirname $safe_mysql_unix_port`
if [ ! -d $mysql_unix_port_dir ]
then
  mkdir $mysql_unix_port_dir
  chown $user $mysql_unix_port_dir
  chmod 755 $mysql_unix_port_dir
fi

# If the user doesn't specify a binary, we assume name "mysqld"
if test -z "$MYSQLD"
then
  MYSQLD=mysqld
fi

if test ! -x "$ledir/$MYSQLD"
then
  log_error "The file $ledir/$MYSQLD
does not exist or is not executable. Please cd to the mysql installation
directory and restart this script from there as follows:
./bin/mysqld_safe&
See http://dev.mysql.com/doc/mysql/en/mysqld-safe.html for more information"
  exit 1
fi

if test -z "$pid_file"
then
  pid_file="$DATADIR/`hostname`.pid"
else
  case "$pid_file" in
    /* ) ;;
    * )  pid_file="$DATADIR/$pid_file" ;;
  esac
fi
append_arg_to_args "--pid-file=$pid_file"

if test -n "$mysql_unix_port"
then
  append_arg_to_args "--socket=$mysql_unix_port"
fi
if test -n "$mysql_tcp_port"
then
  append_arg_to_args "--port=$mysql_tcp_port"
fi

if test $niceness -eq 0
then
  NOHUP_NICENESS="nohup"
else
  NOHUP_NICENESS="nohup nice -$niceness"
fi

# Using nice with no args to get the niceness level is GNU-specific.
# This check could be extended for other operating systems (e.g.,
# BSD could use "nohup sh -c 'ps -o nice -p $$' | tail -1").
# But, it also seems that GNU nohup is the only one which messes
# with the priority, so this is okay.
if nohup nice > /dev/null 2>&1
then
    normal_niceness=`nice`
    nohup_niceness=`nohup nice 2>/dev/null`

    numeric_nice_values=1
    for val in $normal_niceness $nohup_niceness
    do
        case "$val" in
            -[0-9] | -[0-9][0-9] | -[0-9][0-9][0-9] | \
             [0-9] |  [0-9][0-9] |  [0-9][0-9][0-9] )
                ;;
            * )
                numeric_nice_values=0 ;;
        esac
    done

    if test $numeric_nice_values -eq 1
    then
        nice_value_diff=`expr $nohup_niceness - $normal_niceness`
        if test $? -eq 0 && test $nice_value_diff -gt 0 && \
            nice --$nice_value_diff echo testing > /dev/null 2>&1
        then
            # nohup increases the priority (bad), and we are permitted
            # to lower the priority with respect to the value the user
            # might have been given
            niceness=`expr $niceness - $nice_value_diff`
            NOHUP_NICENESS="nice -$niceness nohup"
        fi
    fi
else
    if nohup echo testing > /dev/null 2>&1
    then
        :
    else
        # nohup doesn't work on this system
        NOHUP_NICENESS=""
    fi
fi

# Try to set the core file size (even if we aren't root) because many systems
# don't specify a hard limit on core file size.
if test -n "$core_file_size"
then
  ulimit -c $core_file_size
fi

#
# If there exists an old pid file, check if the daemon is already running
# Note: The switches to 'ps' may depend on your operating system
if test -f "$pid_file"
then
  PID=`cat "$pid_file"`
  if kill -0 $PID > /dev/null 2> /dev/null
  then
    if ps wwwp $PID | grep -v mysqld_safe | grep -- $MYSQLD > /dev/null
    then    # The pid contains a mysqld process
      log_error "A mysqld process already exists"
      exit 1
    fi
  fi
  rm -f "$pid_file"
  if test -f "$pid_file"
  then
    log_error "Fatal error: Can't remove the pid file:
$pid_file
Please remove it manually and start $0 again;
mysqld daemon not started"
    exit 1
  fi
fi

#
# Flush and purge buffers/caches.
#

if true && test $flush_caches -eq 1
then
  # Locate sync, ensure it exists.
  if ! my_which sync > /dev/null 2>&1
  then
    log_error "sync command not found, required for --flush-caches"
    exit 1
  # Flush file system buffers.
  elif ! sync
  then
    # Huh, the sync() function is always successful...
    log_error "sync failed, check if sync is properly installed"
  fi

  # Locate sysctl, ensure it exists.
  if ! my_which sysctl > /dev/null 2>&1
  then
    log_error "sysctl command not found, required for --flush-caches"
    exit 1
  # Purge page cache, dentries and inodes.
  elif ! sysctl -q -w vm.drop_caches=3
  then
    log_error "sysctl failed, check the error message for details"
    exit 1
  fi
elif test $flush_caches -eq 1
then
  log_error "--flush-caches is not supported on this platform"
  exit 1
fi

#
# From now on, we catch signals to do a proper shutdown of mysqld
# when signalled to do so.
#
trap '/usr/bin/mysqladmin --defaults-extra-file=/etc/mysql/debian.cnf refresh & wait' 1 # HUP
trap '/usr/bin/mysqladmin --defaults-extra-file=/etc/mysql/debian.cnf shutdown' 2 3 15 # INT QUIT and TERM

#
# Uncomment the following lines if you want all tables to be automatically
# checked and repaired during startup. You should add sensible key_buffer
# and sort_buffer values to my.cnf to improve check performance or require
# less disk space.
# Alternatively, you can start mysqld with the "myisam-recover" option. See
# the manual for details.
#
# echo "Checking tables in $DATADIR"
# $MY_BASEDIR_VERSION/bin/myisamchk --silent --force --fast --medium-check $DATADIR/*/*.MYI
# $MY_BASEDIR_VERSION/bin/isamchk --silent --force $DATADIR/*/*.ISM

# Does this work on all systems?
#if type ulimit | grep "shell builtin" > /dev/null
#then
#  ulimit -n 256 > /dev/null 2>&1		# Fix for BSD and FreeBSD systems
#fi

cmd="`mysqld_ld_preload_text`$NOHUP_NICENESS"

#
# Set mysqld's memory interleave policy.
#

if true && test $numa_interleave -eq 1
then
  # Locate numactl, ensure it exists.
  if ! my_which numactl > /dev/null 2>&1
  then
    log_error "numactl command not found, required for --numa-interleave"
    exit 1
  # Attempt to run a command, ensure it works.
  elif ! numactl --interleave=all true
  then
    log_error "numactl failed, check if numactl is properly installed"
  fi

  # Launch mysqld with numactl.
  cmd="$cmd numactl --interleave=all"
elif test $numa_interleave -eq 1
then
  log_error "--numa-interleave is not supported on this platform"
  exit 1
fi

for i in  "$ledir/$MYSQLD" "$defaults" "--basedir=$MY_BASEDIR_VERSION" \
  "--datadir=$DATADIR" "--plugin-dir=$plugin_dir" "$USER_OPTION"
do
  cmd="$cmd "`shell_quote_string "$i"`
done
cmd="$cmd $args"
# Avoid 'nohup: ignoring input' warning
test -n "$NOHUP_NICENESS" && cmd="$cmd < /dev/null"

log_notice "Starting $MYSQLD daemon with databases from $DATADIR"

# variable to track the current number of "fast" (a.k.a. subsecond) restarts
fast_restart=0
# maximum number of restarts before trottling kicks in
max_fast_restarts=5
# flag whether a usable sleep command exists
have_sleep=1

while true
do
  rm -f $safe_mysql_unix_port "$pid_file"	# Some extra safety

  start_time=`date +%M%S`

  eval_log_error "$cmd"

  if [ $want_syslog -eq 0 -a ! -f "$err_log" ]; then
    touch "$err_log"                    # hypothetical: log was renamed but not
    chown $user "$err_log"              # flushed yet. we'd recreate it with
    chmod "$fmode" "$err_log"           # wrong owner next time we log, so set
  fi                                    # it up correctly while we can!

  end_time=`date +%M%S`

  if test ! -f "$pid_file"		# This is removed if normal shutdown
  then
    break
  fi


  # sanity check if time reading is sane and there's sleep
  if test $end_time -gt 0 -a $have_sleep -gt 0
  then
    # throttle down the fast restarts
    if test $end_time -eq $start_time
    then
      fast_restart=`expr $fast_restart + 1`
      if test $fast_restart -ge $max_fast_restarts
      then
        log_notice "The server is respawning too fast. Sleeping for 1 second."
        sleep 1
        sleep_state=$?
        if test $sleep_state -gt 0
        then
          log_notice "The server is respawning too fast and no working sleep command. Turning off trottling."
          have_sleep=0
        fi

        fast_restart=0
      fi
    else
      fast_restart=0
    fi
  fi

  if true && test $KILL_MYSQLD -eq 1
  then
    # Test if one process was hanging.
    # This is only a fix for Linux (running as base 3 mysqld processes)
    # but should work for the rest of the servers.
    # The only thing is ps x => redhat 5 gives warnings when using ps -x.
    # kill -9 is used or the process won't react on the kill.
    numofproces=`ps xaww | grep -v "grep" | grep "$ledir/$MYSQLD\>" | grep -c "pid-file=$pid_file"`

    log_notice "Number of processes running now: $numofproces"
    I=1
    while test "$I" -le "$numofproces"
    do 
      PROC=`ps xaww | grep "$ledir/$MYSQLD\>" | grep -v "grep" | grep "pid-file=$pid_file" | sed -n '$p'` 

      for T in $PROC
      do
        break
      done
      #    echo "TEST $I - $T **"
      if kill -9 $T
      then
        log_error "$MYSQLD process hanging, pid $T - killed"
      else
        break
      fi
      I=`expr $I + 1`
    done
  fi
  log_notice "mysqld restarted"
done

log_notice "mysqld from pid file $pid_file ended"