summaryrefslogtreecommitdiffstats
path: root/etc/rc.subr
blob: 9610c88d3de466efb3668db2ad3cebfa53eb56da (plain)
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
# $NetBSD: rc.subr,v 1.49 2002/05/21 12:31:01 lukem Exp $
# $FreeBSD$
#
# Copyright (c) 1997-2002 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Luke Mewburn.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
#    notice, this list of conditions and the following disclaimer in the
#    documentation and/or other materials provided with the distribution.
# 3. All advertising materials mentioning features or use of this software
#    must display the following acknowledgement:
#        This product includes software developed by the NetBSD
#        Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation nor the names of its
#    contributors may be used to endorse or promote products derived
#    from this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
# ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
# TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# rc.subr
#	functions used by various rc scripts
#

#
#	Operating System dependent/independent variables
#

SYSCTL="/sbin/sysctl"
SYSCTL_N="${SYSCTL} -n"
CMD_OSTYPE="${SYSCTL_N} kern.ostype"
OSTYPE=`${CMD_OSTYPE}`

case ${OSTYPE} in
FreeBSD)
	SYSCTL_W="${SYSCTL}"
	;;
NetBSD)
	SYSCTL_W="${SYSCTL} -w"
	;;
esac

#
#	functions
#	---------

#
# set_rcvar base_var
#	Set the variable name enabling a specific service.
#	FreeBSD uses ${service}_enable, while NetBSD uses
#	just the name of the service. For example:
#	FreeBSD: sendmail_enable="YES"
#	NetBSD : sendmail="YES"
#	$1 - if $name is not the base to work of off, specify
#	     a different one
#
set_rcvar()
{
	if [ -z "$1" ]; then
		base_var=${name}
	else
		base_var="$1"
	fi

	case ${OSTYPE} in
	FreeBSD)
		echo ${base_var}_enable
		;;
	NetBSD)
		echo ${base_var}
		;;
	*)
		echo 'XXX'
		;;
	esac
}

#
# force_depend script
#	Force a service to start. Intended for use by services
#	to resolve dependency issues. It is assumed the caller
#	has check to make sure this call is necessary
#	$1 - filename of script, in /etc/rc.d, to run
#
force_depend()
{
	_depend="$1"

	info "${name} depends on ${_depend}, which will be forced to start."
	if ! /etc/rc.d/${_depend} forcestart ; then
		warn "Unable to force ${_depend}. It may already be running."
		return 1
	fi
	return 0
}

#
# checkyesno var
#	Test $1 variable, and warn if not set to YES or NO.
#	Return 0 if it's "yes" (et al), nonzero otherwise.
#
checkyesno()
{
	eval _value=\$${1}
	debug "checkyesno: $1 is set to $_value."
	case $_value in

		#	"yes", "true", "on", or "1"
	[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
		return 0
		;;

		#	"no", "false", "off", or "0"
	[Nn][Oo]|[Ff][Aa][Ll][Ss][Ee]|[Oo][Ff][Ff]|0)
		return 1
		;;
	*)
		warn "\$${1} is not set properly - see rc.conf(5)."
		return 1
		;;
	esac
}

# reverse_list list
#	print the list in reverse order
#
reverse_list()
{
	_revlist=
	for _revfile in $*; do
		_revlist="$_revfile $_revlist"
	done
	echo $_revlist
}

#
# mount_critical_filesystems type
#	Go through the list of critical filesystems as provided in
#	the rc.conf(5) variable $critical_filesystems_${type}, checking
#	each one to see if it is mounted, and if it is not, mounting it.
#
mount_critical_filesystems()
{
	eval _fslist=\$critical_filesystems_${1}
	for _fs in $_fslist; do
		mount | (
			_ismounted=no
			while read what _on on _type type; do
				if [ $on = $_fs ]; then
					_ismounted=yes
				fi
			done
			if [ $_ismounted = no ]; then
				mount $_fs >/dev/null 2>&1
			fi
		)
	done
}

#
# check_pidfile pidfile procname [interpreter]
#	Parses the first line of pidfile for a PID, and ensures
#	that the process is running and matches procname.
#	Prints the matching PID upon success, nothing otherwise.
#	interpreter is optional; see _find_processes() for details.
#
check_pidfile()
{
	_pidfile=$1
	_procname=$2
	_interpreter=$3
	if [ -z "$_pidfile" -o -z "$_procname" ]; then
		err 3 'USAGE: check_pidfile pidfile procname [interpreter]'
	fi
	if [ ! -f $_pidfile ]; then
		debug "pid file {$_pidfile): not readable."
		return
	fi
	read _pid _junk < $_pidfile
	if [ -z "$_pid" ]; then
		debug "pid file {$_pidfile): no pid in file."
		return
	fi
	_find_processes $_procname ${_interpreter:-.} '-p '"$_pid"
}

#
# check_process procname [interpreter]
#	Ensures that a process (or processes) named procname is running.
#	Prints a list of matching PIDs.
#	interpreter is optional; see _find_processes() for details.
#
check_process()
{
	_procname=$1
	_interpreter=$2
	if [ -z "$_procname" ]; then
		err 3 'USAGE: check_process procname [interpreter]'
	fi
	_find_processes $_procname ${_interpreter:-.} '-ax'
}

#
# _find_processes procname interpreter psargs
#	Search for procname in the output of ps generated by psargs.
#	Prints the PIDs of any matching processes, space separated.
#
#	If interpreter == ".", check the following variations of procname
#	against the first word of each command:
#		procname
#		`basename procname`
#		`basename procname` + ":"
#		"(" + `basename procname` + ")"
#
#	If interpreter != ".", read the first line of procname, remove the
#	leading #!, normalise whitespace, append procname, and attempt to
#	match that against each command, either as is, or with extra words
#	at the end.
#
_find_processes()
{
	if [ $# -ne 3 ]; then
		err 3 'USAGE: _find_processes procname interpreter psargs'
	fi
	_procname=$1
	_interpreter=$2
	_psargs=$3

	_pref=
	if [ $_interpreter != "." ]; then	# an interpreted script
		read _interp < $_procname	# read interpreter name
		_interp=${_interp#\#!}		# strip #!
		set -- $_interp
		if [ $_interpreter != $1 ]; then
			warn "\$command_interpreter $_interpreter != $1"
		fi
		_interp="$* $_procname"		# cleanup spaces, add _procname
		_fp_args='_argv'
		_fp_match='case "$_argv" in
		    ${_interp}|"${_interp} "*)'
	else					# a normal daemon
		_procnamebn=${_procname##*/}
		_fp_args='_arg0 _argv'
		_fp_match='case "$_arg0" in
		    $_procname|$_procnamebn|${_procnamebn}:|"(${_procnamebn})")'
	fi

	_proccheck='
		ps -o "pid,command" '"$_psargs"' |
		while read _npid '"$_fp_args"'; do
			case "$_npid" in
			    PID)
				continue ;;
			esac ; '"$_fp_match"'
				echo -n "$_pref$_npid" ;
				_pref=" "
				;;
			esac
		done'

#	debug "in _find_processes: proccheck is ($_proccheck)."
	eval $_proccheck
}

#
# wait_for_pids pid [pid ...]
#	spins until none of the pids exist
#
wait_for_pids()
{
	_list=$*
	if [ -z "$_list" ]; then
		return
	fi
	_prefix=
	while true; do
		_nlist="";
		for _j in $_list; do
			if kill -0 $_j 2>/dev/null; then
				_nlist="${_nlist}${_nlist:+ }$_j"
			fi
		done
		if [ -z "$_nlist" ]; then
			break
		fi
		_list=$_nlist
		echo -n ${_prefix:-"Waiting for PIDS: "}$_list
		_prefix=", "
		sleep 2
	done
	if [ -n "$_prefix" ]; then
		echo "."
	fi
}

#
# run_rc_command argument
#	Search for argument in the list of supported commands, which is:
#		"start stop restart rcvar status poll ${extra_commands}"
#	If there's a match, run ${argument}_cmd or the default method
#	(see below).
#
#	If argument has a given prefix, then change the operation as follows:
#		Prefix	Operation
#		------	---------
#		fast	Skip the pid check, and set rc_fast=yes
#		force	Set ${rcvar} to YES, and set rc_force=yes
#
#	The following globals are used:
#
#	Name		Needed	Purpose
#	----		------	-------
#	name		y	Name of script.
#
#	command		n	Full path to command.
#				Not needed if ${rc_arg}_cmd is set for
#				each keyword.
#
#	command_args	n	Optional args/shell directives for command.
#
#	command_interpreter n	If not empty, command is interpreted, so
#				call check_{pidfile,process}() appropriately.
#
#	extra_commands	n	List of extra commands supported.
#
#	pidfile		n	If set, use check_pidfile $pidfile $command,
#				otherwise use check_process $command.
#				In either case, only check if $command is set.
#
#	procname	n	Process name to check for instead of $command.
#
#	rcvar		n	This is checked with checkyesno to determine
#				if the action should be run.
#
#	${name}_chroot	n	Directory to chroot to before running ${command}
#				Requires /usr to be mounted.
#
#	${name}_chdir	n	Directory to cd to before running ${command}
#				(if not using ${name}_chroot).
#
#	${name}_flags	n	Arguments to call ${command} with.
#				NOTE:	$flags from the parent environment
#					can be used to override this.
#
#	${name}_nice	n	Nice level to run ${command} at.
#
#	${name}_user	n	User to run ${command} as, using su(1) if not
#				using ${name}_chroot.
#				Requires /usr to be mounted.
#
#	${name}_group	n	Group to run chrooted ${command} as.
#				Requires /usr to be mounted.
#
#	${name}_groups	n	Comma separated list of supplementary groups
#				to run the chrooted ${command} with.
#				Requires /usr to be mounted.
#
#	${rc_arg}_cmd	n	If set, use this as the method when invoked;
#				Otherwise, use default command (see below)
#
#	${rc_arg}_precmd n	If set, run just before performing the
#				${rc_arg}_cmd method in the default
#				operation (i.e, after checking for required
#				bits and process (non)existence).
#				If this completes with a non-zero exit code,
#				don't run ${rc_arg}_cmd.
#
#	${rc_arg}_postcmd n	If set, run just after performing the
#				${rc_arg}_cmd method, if that method
#				returned a zero exit code.
#
#	required_dirs	n	If set, check for the existence of the given
#				directories before running the default
#				(re)start command.
#
#	required_files	n	If set, check for the readability of the given
#				files before running the default (re)start
#				command.
#
#	required_vars	n	If set, perform checkyesno on each of the
#				listed variables before running the default
#				(re)start command.
#
#	Default behaviour for a given argument, if no override method is
#	provided:
#
#	Argument	Default behaviour
#	--------	-----------------
#	start		if !running && checkyesno ${rcvar}
#				${command}
#
#	stop		if ${pidfile}
#				rc_pid=$(check_pidfile $pidfile $command)
#			else
#				rc_pid=$(check_process $command)
#			kill $sig_stop $rc_pid
#			wait_for_pids $rc_pid
#			($sig_stop defaults to TERM.)
#
#	reload		Similar to stop, except use $sig_reload instead,
#			and doesn't wait_for_pids.
#			$sig_reload defaults to HUP.
#
#	restart		Run `stop' then `start'.
#
#	status		Show if ${command} is running, etc.
#
#	poll		Wait for ${command} to exit.
#
#	rcvar		Display what rc.conf variable is used (if any).
#
#	Variables available to methods, and after run_rc_command() has
#	completed:
#
#	Variable	Purpose
#	--------	-------
#	rc_arg		Argument to command, after fast/force processing
#			performed
#
#	rc_flags	Flags to start the default command with.
#			Defaults to ${name}_flags, unless overridden
#			by $flags from the environment.
#			This variable may be changed by the precmd method.
#
#	rc_pid		PID of command (if appropriate)
#
#	rc_fast		Not empty if "fast" was provided (q.v.)
#
#	rc_force	Not empty if "force" was provided (q.v.)
#
#
run_rc_command()
{
	_return=0
	rc_arg=$1
	if [ -z "$name" ]; then
		err 3 'run_rc_command: $name is not set.'
	fi

	case "$rc_arg" in
	fast*)				# "fast" prefix; don't check pid
		rc_arg=${rc_arg#fast}
		rc_fast=yes
		;;
	force*)				# "force prefix; always start
		rc_arg=${rc_arg#force}
		rc_force=yes
		if [ -n "${rcvar}" ]; then
			eval ${rcvar}=YES
		fi
		;;
	esac

	eval _overide_command=\$${name}_program
	if [ -n "$_overide_command" ]; then
		command=$_overide_command
	fi

	_keywords="start stop restart rcvar $extra_commands"
	rc_pid=
	_pidcmd=
	_procname=${procname:-${command}}

					# setup pid check command if not fast
	if [ -z "$rc_fast" -a -n "$_procname" ]; then
		if [ -n "$pidfile" ]; then
			_pidcmd='rc_pid=$(check_pidfile '"$pidfile $_procname $command_interpreter"')'
		else
			_pidcmd='rc_pid=$(check_process '"$_procname $command_interpreter"')'
		fi
		if [ -n "$_pidcmd" ]; then
			_keywords="${_keywords} status poll"
		fi
	fi

	if [ -z "$rc_arg" ]; then
		rc_usage "$_keywords"
	fi

	if [ -n "$flags" ]; then	# allow override from environment
		rc_flags=$flags
	else
		eval rc_flags=\$${name}_flags
	fi
	eval _chdir=\$${name}_chdir	_chroot=\$${name}_chroot \
	    _nice=\$${name}_nice	_user=\$${name}_user \
	    _group=\$${name}_group	_groups=\$${name}_groups

	if [ -n "$_user" ]; then	# unset $_user if running as that user
		if [ "$_user" = "$(id -un)" ]; then
			unset _user
		fi
	fi

					# if ${rcvar} is set, and $1 is not
					# "rcvar", then run
					#	checkyesno ${rcvar}
					# and return if that failed
					#
	if [ -n "${rcvar}" -a "$rc_arg" != "rcvar" ]; then
		if ! checkyesno ${rcvar}; then
			return 0
		fi
	fi

	eval $_pidcmd			# determine the pid if necessary

	for _elem in $_keywords; do
		if [ "$_elem" != "$rc_arg" ]; then
			continue
		fi

					# if there's a custom ${XXX_cmd},
					# run that instead of the default
					#
		eval _cmd=\$${rc_arg}_cmd _precmd=\$${rc_arg}_precmd \
		    _postcmd=\$${rc_arg}_postcmd
		if [ -n "$_cmd" ]; then
					# if the precmd failed and force
					# isn't set, exit
					#
			if [ -n "$_precmd" ]; then
				debug "run_rc_command: evaluating ${_precmd}()."
				eval $_precmd
				_return=$?
				[ $_return -ne 0 ] && [ -z "$rc_force" ] &&
				    return 1
			fi

			if [ -n "$_cmd" ]; then
				debug "run_rc_command: evaluating ${_cmd}()."
				eval $_cmd
				_return=$?
				[ $_return -ne 0 ] && [ -z "$rc_force" ] &&
				    return 1
			fi

			if [ -n "$_postcmd" ]; then
				debug "run_rc_command: evaluating ${_postcmd}()."
				 eval $_postcmd
				_return=$?
			fi
			return $_return
		fi

		case "$rc_arg" in	# default operations...

		status)
			if [ -n "$rc_pid" ]; then
				echo "${name} is running as pid $rc_pid."
			else
				echo "${name} is not running."
				return 1
			fi
			;;

		start)
			if [ -n "$rc_pid" ]; then
				echo "${name} already running? (pid=$rc_pid)."
				exit 1
			fi

			if [ ! -x $command ]; then
				info "run_rc_command: cannot run ($command)."
				return 0
			fi

					# check for required variables,
					# directories, and files
					#
			for _f in $required_vars; do
				if ! checkyesno $_f; then
					warn "\$${_f} is not set."
					if [ -z "$rc_force" ]; then
						return 1
					fi
				fi
			done
			for _f in $required_dirs; do
				if [ ! -d "${_f}/." ]; then
					warn "${_f} is not a directory."
					if [ -z "$rc_force" ]; then
						return 1
					fi
				fi
			done
			for _f in $required_files; do
				if [ ! -r "${_f}" ]; then
					warn "${_f} is not readable."
					if [ -z "$rc_force" ]; then
						return 1
					fi
				fi
			done

					# if the precmd failed and force
					# isn't set, exit
					#
			if [ -n "${_precmd}" ]; then
				debug "run_rc_command: evaluating ${_precmd}()."
				eval $_precmd
				_return=$?
				[ $_return -ne 0 ] && [ -z "$rc_force" ] &&
				    return 1
			fi

					# setup the command to run, and run it
					#
			echo "Starting ${name}."
			if [ -n "$_chroot" ]; then
				_doit="\
${_nice:+nice -n $_nice }\
chroot ${_user:+-u $_user }${_group:+-g $_group }${_groups:+-G $_groups }\
$_chroot $command $rc_flags $command_args"
			else
				_doit="\
${_chdir:+cd $_chdir; }\
${_nice:+nice -n $_nice }\
$command $rc_flags $command_args"
				if [ -n "$_user" ]; then
				    _doit="su -m $_user -c 'sh -c \"$_doit\"'"
				fi
			fi

					# if the cmd failed and force
					# isn't set, exit
					#
			debug "run_rc_command: _doit: $_doit"
			eval $_doit
			_return=$?
			[ $_return -ne 0 ] && [ -z "$rc_force" ] && return 1

					# finally, run postcmd
					#
			if [ -n "${_postcmd}" ]; then
				debug "run_rc_command: evaluating ${_postcmd}()."
				eval $_postcmd
			fi
			;;

		stop)
			if [ -z "$rc_pid" ]; then
				if [ -n "$pidfile" ]; then
					echo \
				    "${name} not running? (check $pidfile)."
				else
					echo "${name} not running?"
				fi
				exit 1
			fi

					# if the precmd failed and force
					# isn't set, exit
					#
			if [ -n $_precmd ]; then
				eval $_precmd
				_return=$?
				[ $_return -ne 0 ] && [ -z "$rc_force" ] &&
				    return 1
			fi

					# send the signal to stop
					#
			echo "Stopping ${name}."
			_doit="kill -${sig_stop:-TERM} $rc_pid"
			if [ -n "$_user" ]; then
				_doit="su -m $_user -c 'sh -c \"$_doit\"'"
			fi

					# if the stop cmd failed and force
					# isn't set, exit
					#
			eval $_doit
			_return=$?
			[ $_return -ne 0 ] && [ -z "$rc_force" ] && return 1

					# wait for the command to exit,
					# and run postcmd.
			wait_for_pids $rc_pid
			if [ -n "$_postcmd" ]; then
				eval $_postcmd
				_return=$?
			fi
			;;

		reload)
			if [ -z "$rc_pid" ]; then
				if [ -n "$pidfile" ]; then
					echo \
				    "${name} not running? (check $pidfile)."
				else
					echo "${name} not running?"
				fi
				exit 1
			fi
			echo "Reloading ${name} config files."
			if [ -n "$_precmd" ]; then
				eval $_precmd
				_return=$?
				[ $_return -ne 0 ] && [ -z "$rc_force" ] &&
				    return 1
			fi
			_doit="kill -${sig_reload:-HUP} $rc_pid"
			if [ -n "$_user" ]; then
				_doit="su -m $_user -c 'sh -c \"$_doit\"'"
			fi
			eval $_doit
			_return=$?
			[ $_return -ne 0 ] && [ -z "$rc_force" ] && return 1
			if [ -n "$_postcmd" ]; then
				eval $_postcmd
				_return=$?
			fi
			;;

		restart)
			if [ -n "$_precmd" ]; then
				eval $_precmd
				_return=$?
				[ $_return -ne 0 ] && [ -z "$rc_force" ] &&
				    return 1
			fi
					# prevent restart being called more
					# than once by any given script
					#
			if [ -n "$_rc_restart_done" ]; then
				return 0
			fi
			_rc_restart_done=YES

			( $0 ${rc_force:+force}stop )
			$0 ${rc_force:+force}start

			if [ -n "$_postcmd" ]; then
				eval $_postcmd
				_return=$?
			fi
			;;

		poll)
			if [ -n "$rc_pid" ]; then
				wait_for_pids $rc_pid
			fi
			;;

		rcvar)
			echo "# $name"
			if [ -n "$rcvar" ]; then
				if checkyesno ${rcvar}; then
					echo "\$${rcvar}=YES"
				else
					echo "\$${rcvar}=NO"
				fi
			fi
			;;

		*)
			rc_usage "$_keywords"
			;;

		esac
		return $_return
	done

	echo 1>&2 "$0: unknown directive '$rc_arg'."
	rc_usage "$_keywords"
	exit 1
}

#
# run_rc_script file arg
#	Start the script `file' with `arg', and correctly handle the
#	return value from the script.  If `file' ends with `.sh', it's
#	sourced into the current environment.  If `file' appears to be
#	a backup or scratch file, ignore it.  Otherwise if it's
#	executable run as a child process.
#
run_rc_script()
{
	_file=$1
	_arg=$2
	if [ -z "$_file" -o -z "$_arg" ]; then
		err 3 'USAGE: run_rc_script file arg'
	fi

	trap "echo 'Reboot interrupted'; exit 1" 3

	unset	name command command_args command_interpreter \
		extra_commands pidfile procname \
		rcvar required_dirs required_files required_vars
	eval unset ${_arg}_cmd ${_arg}_precmd ${_arg}_postcmd

	case "$_file" in
	*.sh)				# run in current shell
		set $_arg ; . $_file
		;;
	*[~#]|*.OLD|*.orig)		# scratch file; skip
		warn "Ignoring scratch file $_file"
		;;
	*)				# run in subshell
		if [ -x $_file ]; then
			if [ -n "$rc_fast_and_loose" ]; then
				set $_arg ; . $_file
			else
				( trap "echo 'Reboot interrupted'; exit 1" 3
				  set $_arg ; . $_file )
			fi
		fi
		;;
	esac
}

#
# load_rc_config
#	Source in the configuration file for a given command.
#
load_rc_config()
{
	_command=$1
	if [ -z "$_command" ]; then
		err 3 'USAGE: load_rc_config command'
	fi

	if [ -z "$_rc_conf_loaded" ]; then
		if [ -r /etc/defaults/rc.conf ]; then
			debug "Sourcing /etc/defaults/rc.conf"
			. /etc/defaults/rc.conf
			source_rc_confs
		elif [ -r /etc/rc.conf ]; then
			debug "Sourcing /etc/rc.conf (/etc/defaults/rc.conf doesn't exist)."
			. /etc/rc.conf
		fi
		_rc_conf_loaded=YES
	fi
	if [ -f /etc/rc.conf.d/"$_command" ]; then
		debug "Sourcing /etc/rc.conf.d/${_command}"
		. /etc/rc.conf.d/"$_command"
	fi

	# XXX - Deprecated variable name support
	#
	case ${OSTYPE} in
	FreeBSD)
        	[ -n "$portmap_enable" ] && rpcbind_enable="$portmap_enable"
        	[ -n "$portmap_program" ] && rpcbind_program="$portmap_program"
        	[ -n "$portmap_flags" ] && rpcbind_flags="$portmap_flags"
        	[ -n "$single_mountd_enable" ] && mountd_enable="$single_mountd_enable"
        	[ -n "$xntpd_enable" ] && ntpd_enable="$xntpd_enable"
        	[ -n "$xntpd_program" ] && ntpd_program="$xntpd_program"
        	[ -n "$xntpd_flags" ] && ntpd_flags="$xntpd_flags"
		[ -n "$dhcp_program" ] && dhclient_program="$dhcp_program"
		[ -n "$dhcp_flags" ] && dhclient_flags="$dhcp_flags"
        	;;
	esac

}

#
# rc_usage commands
#	Print a usage string for $0, with `commands' being a list of
#	valid commands.
#
rc_usage()
{
	echo -n 1>&2 "Usage: $0 [fast|force]("

	_sep=
	for _elem in $*; do
		echo -n 1>&2 "$_sep$_elem"
		_sep="|"
	done
	echo 1>&2 ")"
	exit 1
}

#
# err exitval message
#	Display message to stderr and log to the syslog, and exit with exitval.
#
err()
{
	exitval=$1
	shift

	if [ -x /usr/bin/logger ]; then
		logger "$0: ERROR: $*"
	fi
	echo 1>&2 "$0: ERROR: $*"
	exit $exitval
}

#
# warn message
#	Display message to stderr and log to the syslog.
#
warn()
{
	if [ -x /usr/bin/logger ]; then
		logger "$0: WARNING: $*"
	fi
	echo 1>&2 "$0: WARNING: $*"
}

#
# info message
#	Display informational message to stdout and log to syslog.
#
info()
{
	if [ -x /usr/bin/logger ]; then
		logger "$0: INFO: $*"
	fi
	echo "$0: INFO: $*"
}

#
# debug message
#	If debugging is enabled in rc.conf output message to stderr.
#	BEWARE that you don't call any subroutine that itself calls this
#	function.
#
debug()
{
	case ${rc_debug} in
	[Yy][Ee][Ss]|[Tt][Rr][Uu][Ee]|[Oo][Nn]|1)
		if [ -x /usr/bin/logger ]; then
			logger "$0: INFO: $*"
		fi
        	echo 1>&2 "$0: DEBUG: $*"
		;;
	esac
}

#
# backup_file action file cur backup
#	Make a backup copy of `file' into `cur', and save the previous
#	version of `cur' as `backup' or use rcs for archiving.
#
#	This routine checks the value of the backup_uses_rcs variable,
#	which can be either YES or NO.
#
#	The `action' keyword can be one of the following:
#
#	add		`file' is now being backed up (and is possibly
#			being reentered into the backups system).  `cur'
#			is created and RCS files, if necessary, are
#			created as well.
#
#	update		`file' has changed and needs to be backed up.
#			If `cur' exists, it is copied to to `back' or
#			checked into RCS (if the repository file is old),
#			and then `file' is copied to `cur'.  Another RCS
#			check in done here if RCS is being used.
#
#	remove		`file' is no longer being tracked by the backups
#			system.  If RCS is not being used, `cur' is moved
#			to `back', otherwise an empty file is checked in,
#			and then `cur' is removed.
#
#
backup_file()
{
	_action=$1
	_file=$2
	_cur=$3
	_back=$4

	if checkyesno backup_uses_rcs; then
		_msg0="backup archive"
		_msg1="update"

		# ensure that history file is not locked
		if [ -f $_cur,v ]; then
			rcs -q -u -U -M $_cur
		fi

		# ensure after switching to rcs that the
		# current backup is not lost
		if [ -f $_cur ]; then
			# no archive, or current newer than archive
			if [ ! -f $_cur,v -o $_cur -nt $_cur,v ]; then
				ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
				rcs -q -kb -U $_cur
				co -q -f -u $_cur
			fi
		fi

		case $_action in
		add|update)
			cp -p $_file $_cur
			ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
			rcs -q -kb -U $_cur
			co -q -f -u $_cur
			chown root:wheel $_cur $_cur,v
			;;
		remove)
			cp /dev/null $_cur
			ci -q -f -u -t-"$_msg0" -m"$_msg1" $_cur
			rcs -q -kb -U $_cur
			chown root:wheel $_cur $_cur,v
			rm $_cur
			;;
		esac
	else
		case $_action in
		add|update)
			if [ -f $_cur ]; then
				cp -p $_cur $_back
			fi
			cp -p $_file $_cur
			chown root:wheel $_cur
			;;
		remove)
			mv -f $_cur $_back
			;;
		esac
	fi
}
OpenPOWER on IntegriCloud