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source: bootscripts-standard/clfs/init.d/functions@ 78b069e

Last change on this file since 78b069e was 7355219, checked in by Chris Staub <chris@…>, 17 years ago
killproc function uses sleep
Property mode set to `100644`
File size: 17.4 KB

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1	#!/bin/bash
2	########################################################################
3	# Begin $rc_base/init.d/functions
4	#
5	# Description : Run Level Control Functions
6	#
7	# Authors : Gerard Beekmans - gerard@linuxfromscratch.org
8	#
9	# Version : 00.00
10	#
11	# Notes : With code based on Matthias Benkmann's simpleinit-msb
12	# http://winterdrache.de/linux/newboot/index.html
13	#
14	########################################################################
15
16	if [ -e /etc/sysconfig/lcd ]; then
17	if [ -e /dev/lcd ]; then
18	source /etc/sysconfig/lcd
19	fi
20	fi
21
22	if [ -e /etc/sysconfig/bootscripts ]; then
23	source /etc/sysconfig/bootscripts
24	fi
25
26	## Environmental setup
27	# Setup default values for environment
28	umask 022
29	export PATH="/bin:/usr/bin:/sbin:/usr/sbin"
30
31	# Signal sent to running processes to refresh their configuration
32	RELOADSIG="HUP"
33
34	# Number of seconds between STOPSIG and FALLBACK when stopping processes
35	KILLDELAY="3"
36
37	## Screen Dimensions
38	# Find current screen size
39	if [ -z "${COLUMNS}" ]; then
40	COLUMNS=$(stty size)
41	COLUMNS=${COLUMNS##* }
42	fi
43
44	# When using remote connections, such as a serial port, stty size returns 0
45	if [ "${COLUMNS}" = "0" ]; then
46	COLUMNS=80
47	fi
48
49	## Measurements for positioning result messages
50	COL=$((${COLUMNS} - 8))
51	WCOL=$((${COL} - 2))
52
53	## Provide an echo that supports -e and -n
54	# If formatting is needed, $ECHO should be used
55	case "`echo -e -n test`" in
56	-[en]*)
57	ECHO=/bin/echo
58	;;
59	*)
60	ECHO=echo
61	;;
62	esac
63
64	## Set Cursor Position Commands, used via $ECHO
65	SET_COL="\\033[${COL}G" # at the $COL char
66	SET_WCOL="\\033[${WCOL}G" # at the $WCOL char
67	CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char
68
69	## Set color commands, used via $ECHO
70	# Please consult `man console_codes for more information
71	# under the "ECMA-48 Set Graphics Rendition" section
72	#
73	# Warning: when switching from a 8bit to a 9bit font,
74	# the linux console will reinterpret the bold (1;) to
75	# the top 256 glyphs of the 9bit font. This does
76	# not affect framebuffer consoles
77	NORMAL="\\033[0;39m" # Standard console grey
78	SUCCESS="\\033[1;32m" # Success is green
79	WARNING="\\033[1;33m" # Warnings are yellow
80	FAILURE="\\033[1;31m" # Failures are red
81	INFO="\\033[1;36m" # Information is light cyan
82	BRACKET="\\033[1;34m" # Brackets are blue
83
84	STRING_LENGTH="0" # the length of the current message
85
86	#*******************************************************************************
87	# Function - boot_mesg()
88	#
89	# Purpose: Sending information from bootup scripts to the console
90	#
91	# Inputs: $1 is the message
92	# $2 is the colorcode for the console
93	#
94	# Outputs: Standard Output
95	#
96	# Dependencies: - sed for parsing strings.
97	# - grep for counting string length.
98	#
99	# Todo:
100	#*******************************************************************************
101	boot_mesg()
102	{
103	local ECHOPARM=""
104
105	if [ "$LCD_PROG" ]; then
106	LCD_OUT1="${1:0:$LCD_CHAR}"
107	$LCD_PROG "$LCD_OUT1" > /dev/null 2>&1
108	fi
109
110	while true
111	do
112	case "${1}" in
113	-n)
114	ECHOPARM=" -n "
115	shift 1
116	;;
117	-*)
118	echo "Unknown Option: ${1}"
119	return 1
120	;;
121	*)
122	break
123	;;
124	esac
125	done
126
127	## Figure out the length of what is to be printed to be used
128	## for warning messages.
129	STRING_LENGTH=$((${#1} + 1))
130
131	# Print the message to the screen
132	${ECHO} ${ECHOPARM} -e "${2}${1}"
133
134	}
135
136	boot_mesg_flush()
137	{
138	# Reset STRING_LENGTH for next message
139	STRING_LENGTH="0"
140	if [ "$LOGGING" ]; then
141	boot_log "${BOOTMESG}${@}"
142	fi
143	}
144
145	boot_log()
146	{
147	if [ "$LOGGING" ]; then
148	/bin/logger -p local2.info -t bootlog "${DISPLAYLOG} ${1}"
149	else
150	return 0
151	fi
152	}
153
154	echo_ok()
155	{
156	if [ "$LCD_PROG" ]; then
157	if [ "$LCD_LINES" = "2" ]; then
158	LCD_OUT2="[ OK ]"
159	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
160	else
161	LCD_OUT2="${LCD_OUT1:0:12} OK"
162	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
163	fi
164	fi
165	${ECHO} -n -e "${CURS_UP}${SET_COL}${BRACKET}[${SUCCESS} OK ${BRACKET}]"
166	${ECHO} -e "${NORMAL}"
167	boot_mesg_flush
168	}
169
170	echo_failure()
171	{
172	if [ "$LCD_PROG" ]; then
173	if [ "$LCD_LINES" = "2" ]; then
174	LCD_OUT2="[ FAIL ]"
175	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
176	else
177	LCD_OUT2="${LCD_OUT1:0:10} FAIL"
178	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
179	fi
180	fi
181	${ECHO} -n -e "${CURS_UP}${SET_COL}${BRACKET}[${FAILURE} FAIL ${BRACKET}]"
182	${ECHO} -e "${NORMAL}"
183	boot_mesg_flush
184	}
185
186	echo_warning()
187	{
188	if [ "$LCD_PROG" ]; then
189	if [ "$LCD_LINES" = "2" ]; then
190	LCD_OUT2="[ WARN ]"
191	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
192	else
193	LCD_OUT2="${LCD_OUT1:0:10} WARN"
194	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
195	fi
196	fi
197	${ECHO} -n -e "${CURS_UP}${SET_COL}${BRACKET}[${WARNING} WARN ${BRACKET}]"
198	${ECHO} -e "${NORMAL}"
199	boot_mesg_flush
200	}
201
202	print_error_msg()
203	{
204	echo_failure
205	# $i is inherited by the rc script
206	boot_log "\n\n${i} failed and exited with a return value of ${error_value}."
207	boot_mesg -n "FAILURE:\n\nYou should not be reading this error message.\n\n" ${FAILURE}
208	boot_mesg -n " It means that an unforeseen error took"
209	boot_mesg -n " place in ${i}, which exited with a return value of"
210	boot_mesg " ${error_value}.\n"
211	boot_mesg_flush
212	boot_mesg -n "If you're able to track this"
213	boot_mesg -n " error down to a bug in one of the files provided by"
214	boot_mesg -n " the CLFS book, please be so kind to inform us at"
215	boot_mesg " clfs-dev@cross-lfs.org.\n"
216	boot_mesg_flush
217	boot_mesg -n "Press Enter to continue..." ${INFO}
218	boot_mesg "" ${NORMAL}
219	read ENTER
220	}
221
222	check_script_status()
223	{
224	# $i is inherited by the rc script
225	if [ ! -f ${i} ]; then
226	boot_mesg "${i} is not a valid symlink." ${WARNING}
227	echo_warning
228	continue
229	fi
230
231	if [ ! -x ${i} ]; then
232	boot_mesg "${i} is not executable, skipping." ${WARNING}
233	echo_warning
234	continue
235	fi
236	}
237
238	evaluate_retval()
239	{
240	error_value="${?}"
241
242	if [ ${error_value} = 0 ]; then
243	echo_ok
244	else
245	echo_failure
246	fi
247
248	# This prevents the 'An Unexpected Error Has Occurred' from trivial
249	# errors.
250	return 0
251	}
252
253	print_status()
254	{
255	if [ "${#}" = "0" ]; then
256	echo "Usage: ${0} {success\|warning\|failure}"
257	return 1
258	fi
259
260	case "${1}" in
261
262	success)
263	echo_ok
264	;;
265
266	warning)
267	# Leave this extra case in because old scripts
268	# may call it this way.
269	case "${2}" in
270	running)
271	${ECHO} -e -n "${CURS_UP}"
272	${ECHO} -e -n "\\033[${STRING_LENGTH}G "
273	boot_mesg "Already running." ${WARNING}
274	echo_warning
275	;;
276	not_running)
277	${ECHO} -e -n "${CURS_UP}"
278	${ECHO} -e -n "\\033[${STRING_LENGTH}G "
279	boot_mesg "Not running." ${WARNING}
280	echo_warning
281	;;
282	not_available)
283	${ECHO} -e -n "${CURS_UP}"
284	${ECHO} -e -n "\\033[${STRING_LENGTH}G "
285	boot_mesg "Not available." ${WARNING}
286	echo_warning
287	;;
288	*)
289	# This is how it is supposed to
290	# be called
291	echo_warning
292	;;
293	esac
294	;;
295
296	failure)
297	echo_failure
298	;;
299
300	esac
301
302	}
303
304	reloadproc()
305	{
306	local pidfile=""
307	local failure=0
308
309	while true
310	do
311	case "${1}" in
312	-p)
313	pidfile="${2}"
314	shift 2
315	;;
316	-*)
317	log_failure_msg "Unknown Option: ${1}"
318	return 2
319	;;
320	*)
321	break
322	;;
323	esac
324	done
325
326	if [ "${#}" -lt "1" ]; then
327	log_failure_msg "Usage: reloadproc [-p pidfile] pathname"
328	return 2
329	fi
330
331	# This will ensure compatibility with previous CLFS Bootscripts
332	if [ -n "${PIDFILE}" ]; then
333	pidfile="${PIDFILE}"
334	fi
335
336	# Is the process running?
337	if [ -z "${pidfile}" ]; then
338	pidofproc -s "${1}"
339	else
340	pidofproc -s -p "${pidfile}" "${1}"
341	fi
342
343	if [ -n "${pidlist}" ]; then
344	for pid in ${pidlist}
345	do
346	kill -"${RELOADSIG}" "${pid}" \|\| failure="1"
347	done
348
349	(exit ${failure})
350	evaluate_retval
351
352	else
353	boot_mesg "Process ${1} not running." ${WARNING}
354	echo_warning
355	fi
356	}
357
358	statusproc()
359	{
360	local pidfile=""
361	local base=""
362	local ret=""
363
364	while true
365	do
366	case "${1}" in
367	-p)
368	pidfile="${2}"
369	shift 2
370	;;
371	-*)
372	log_failure_msg "Unknown Option: ${1}"
373	return 2
374	;;
375	*)
376	break
377	;;
378	esac
379	done
380
381	if [ "${#}" != "1" ]; then
382	shift 1
383	log_failure_msg "Usage: statusproc [-p pidfile] pathname"
384	return 2
385	fi
386
387	# Get the process basename
388	base="${1##*/}"
389
390	# This will ensure compatibility with previous CLFS Bootscripts
391	if [ -n "${PIDFILE}" ]; then
392	pidfile="${PIDFILE}"
393	fi
394
395	# Is the process running?
396	if [ -z "${pidfile}" ]; then
397	pidofproc -s "${1}"
398	else
399	pidofproc -s -p "${pidfile}" "${1}"
400	fi
401
402	# Store the return status
403	ret=$?
404
405	if [ -n "${pidlist}" ]; then
406	${ECHO} -e "${INFO}${base} is running with Process"\
407	"ID(s) ${pidlist}.${NORMAL}"
408	else
409	if [ -n "${base}" -a -e "/var/run/${base}.pid" ]; then
410	${ECHO} -e "${WARNING}${1} is not running but"\
411	"/var/run/${base}.pid exists.${NORMAL}"
412	else
413	if [ -n "${pidfile}" -a -e "${pidfile}" ]; then
414	${ECHO} -e "${WARNING}${1} is not running"\
415	"but ${pidfile} exists.${NORMAL}"
416	else
417	${ECHO} -e "${INFO}${1} is not running.${NORMAL}"
418	fi
419	fi
420	fi
421
422	# Return the status from pidofproc
423	return $ret
424	}
425
426	# The below functions are documented in the LSB-generic 2.1.0
427
428	#*******************************************************************************
429	# Function - pidofproc [-s] [-p pidfile] pathname
430	#
431	# Purpose: This function returns one or more pid(s) for a particular daemon
432	#
433	# Inputs: -p pidfile, use the specified pidfile instead of pidof
434	# pathname, path to the specified program
435	#
436	# Outputs: return 0 - Success, pid's in stdout
437	# return 1 - Program is dead, pidfile exists
438	# return 2 - Invalid or excessive number of arguments,
439	# warning in stdout
440	# return 3 - Program is not running
441	#
442	# Dependencies: pidof, echo, head
443	#
444	# Todo: Remove dependency on head
445	# This depreciates getpids
446	# Test changes to pidof
447	#
448	#*******************************************************************************
449	pidofproc()
450	{
451	local pidfile=""
452	local lpids=""
453	local silent=""
454	pidlist=""
455	while true
456	do
457	case "${1}" in
458	-p)
459	pidfile="${2}"
460	shift 2
461	;;
462
463	-s)
464	# Added for legacy opperation of getpids
465	# eliminates several '> /dev/null'
466	silent="1"
467	shift 1
468	;;
469	-*)
470	log_failure_msg "Unknown Option: ${1}"
471	return 2
472	;;
473	*)
474	break
475	;;
476	esac
477	done
478
479	if [ "${#}" != "1" ]; then
480	shift 1
481	log_failure_msg "Usage: pidofproc [-s] [-p pidfile] pathname"
482	return 2
483	fi
484
485	if [ -n "${pidfile}" ]; then
486	if [ ! -r "${pidfile}" ]; then
487	return 3 # Program is not running
488	fi
489
490	lpids=`head -n 1 ${pidfile}`
491	for pid in ${lpids}
492	do
493	if [ "${pid}" -ne "$$" -a "${pid}" -ne "${PPID}" ]; then
494	kill -0 "${pid}" 2>/dev/null &&
495	pidlist="${pidlist} ${pid}"
496	fi
497
498	if [ "${silent}" != "1" ]; then
499	echo "${pidlist}"
500	fi
501
502	test -z "${pidlist}" &&
503	# Program is dead, pidfile exists
504	return 1
505	# else
506	return 0
507	done
508
509	else
510	pidlist=`pidof -o $$ -o $PPID -x "$1"`
511	if [ "${silent}" != "1" ]; then
512	echo "${pidlist}"
513	fi
514
515	# Get provide correct running status
516	if [ -n "${pidlist}" ]; then
517	return 0
518	else
519	return 3
520	fi
521
522	fi
523
524	if [ "$?" != "0" ]; then
525	return 3 # Program is not running
526	fi
527	}
528
529	# This will ensure compatibility with previous CLFS Bootscripts
530	getpids()
531	{
532	if [ -z "${PIDFILE}" ]; then
533	pidofproc -s -p "${PIDFILE}" $@
534	else
535	pidofproc -s $@
536	fi
537	base="${1##*/}"
538	}
539
540	#*******************************************************************************
541	# Function - loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]
542	#
543	# Purpose: This runs the specified program as a daemon
544	#
545	# Inputs: -f, run the program even if it is already running
546	# -n nicelevel, specifies a nice level. See nice(1).
547	# -p pidfile, uses the specified pidfile
548	# pathname, pathname to the specified program
549	# args, arguments to pass to specified program
550	#
551	# Outputs: return 0 - Success
552	# return 2 - Invalid of excessive number of arguments,
553	# warning in stdout
554	# return 4 - Program or service status is unknown
555	#
556	# Dependencies: nice
557	#
558	# Todo: LSB says this should be called start_daemon
559	# LSB does not say that it should call evaluate_retval
560	# It checks for PIDFILE, which is deprecated.
561	# Will be removed after BLFS 6.0
562	# loadproc returns 0 if program is already running, not LSB compliant
563	#
564	#*******************************************************************************
565	loadproc()
566	{
567	local pidfile=""
568	local forcestart=""
569	local nicelevel="10"
570
571	# This will ensure compatibility with previous CLFS Bootscripts
572	if [ -n "${PIDFILE}" ]; then
573	pidfile="${PIDFILE}"
574	fi
575
576	while true
577	do
578	case "${1}" in
579	-f)
580	forcestart="1"
581	shift 1
582	;;
583	-n)
584	nicelevel="${2}"
585	shift 2
586	;;
587	-p)
588	pidfile="${2}"
589	shift 2
590	;;
591	-*)
592	log_failure_msg "Unknown Option: ${1}"
593	return 2 #invalid or excess argument(s)
594	;;
595	*)
596	break
597	;;
598	esac
599	done
600
601	if [ "${#}" = "0" ]; then
602	log_failure_msg "Usage: loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]"
603	return 2 #invalid or excess argument(s)
604	fi
605
606	if [ -z "${forcestart}" ]; then
607	if [ -z "${pidfile}" ]; then
608	pidofproc -s "${1}"
609	else
610	pidofproc -s -p "${pidfile}" "${1}"
611	fi
612
613	case "${?}" in
614	0)
615	log_warning_msg "Unable to continue: ${1} is running"
616	return 0 # 4
617	;;
618	1)
619	log_warning_msg "Unable to continue: ${pidfile} exists"
620	return 0 # 4
621	;;
622	3)
623	;;
624	*)
625	log_failure_msg "Unknown error code from pidofproc: ${?}"
626	return 4
627	;;
628	esac
629	fi
630
631	nice -n "${nicelevel}" "${@}"
632	evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
633	return 0
634	}
635
636	#*******************************************************************************
637	# Function - killproc [-p pidfile] pathname [signal]
638	#
639	# Purpose:
640	#
641	# Inputs: -p pidfile, uses the specified pidfile
642	# pathname, pathname to the specified program
643	# signal, send this signal to pathname
644	#
645	# Outputs: return 0 - Success
646	# return 2 - Invalid of excessive number of arguments,
647	# warning in stdout
648	# return 4 - Unknown Status
649	#
650	# Dependencies: kill, sleep
651	#
652	# Todo: LSB does not say that it should call evaluate_retval
653	# It checks for PIDFILE, which is deprecated.
654	# Will be removed after BLFS 6.0
655	#
656	#*******************************************************************************
657	killproc()
658	{
659	local pidfile=""
660	local killsig=TERM # default signal is SIGTERM
661	pidlist=""
662
663	# This will ensure compatibility with previous CLFS Bootscripts
664	if [ -n "${PIDFILE}" ]; then
665	pidfile="${PIDFILE}"
666	fi
667
668	while true
669	do
670	case "${1}" in
671	-p)
672	pidfile="${2}"
673	shift 2
674	;;
675	-*)
676	log_failure_msg "Unknown Option: ${1}"
677	return 2
678	;;
679	*)
680	break
681	;;
682	esac
683	done
684
685	if [ "${#}" = "2" ]; then
686	killsig="${2}"
687	elif [ "${#}" != "1" ]; then
688	shift 2
689	log_failure_msg "Usage: killproc [-p pidfile] pathname [signal]"
690	return 2
691	fi
692
693	# Is the process running?
694	if [ -z "${pidfile}" ]; then
695	pidofproc -s "${1}"
696	else
697	pidofproc -s -p "${pidfile}" "${1}"
698	fi
699
700	# If running, send the signal
701	if [ -n "${pidlist}" ]; then
702	for pid in ${pidlist}
703	do
704	kill -${killsig} ${pid} 2>/dev/null
705
706	# Wait up to 3 seconds, for ${pid} to terminate
707	case "${killsig}" in
708	TERM\|SIGTERM\|KILL\|SIGKILL)
709	# sleep in 1/10ths of seconds and
710	# multiply KILLDELAY by 10
711	local dtime="${KILLDELAY}0"
712	while [ "${dtime}" != "0" ]
713	do
714	kill -0 ${pid} 2>/dev/null \|\| break
715	sleep 0.1
716	dtime=$(( ${dtime} - 1))
717	done
718	# If ${pid} is still running, kill it
719	kill -0 ${pid} 2>/dev/null && kill -KILL ${pid} 2>/dev/null
720	;;
721	esac
722	done
723
724	# Check if the process is still running if we tried to stop it
725	case "${killsig}" in
726	TERM\|SIGTERM\|KILL\|SIGKILL)
727	if [ -z "${pidfile}" ]; then
728	pidofproc -s "${1}"
729	else
730	pidofproc -s -p "${pidfile}" "${1}"
731	fi
732
733	# Program was terminated
734	if [ "$?" != "0" ]; then
735	# Remove the pidfile if necessary
736	if [ -f "${pidfile}" ]; then
737	rm -f "${pidfile}"
738	fi
739	echo_ok
740	return 0
741	else # Program is still running
742	echo_failure
743	return 4 # Unknown Status
744	fi
745	;;
746	*)
747	# Just see if the kill returned successfully
748	evaluate_retval
749	;;
750	esac
751	else # process not running
752	print_status warning not_running
753	fi
754	}
755
756
757	#*******************************************************************************
758	# Function - log_success_msg "message"
759	#
760	# Purpose: Print a success message
761	#
762	# Inputs: $@ - Message
763	#
764	# Outputs: Text output to screen
765	#
766	# Dependencies: echo
767	#
768	# Todo: logging
769	#
770	#*******************************************************************************
771	log_success_msg()
772	{
773	${ECHO} -n -e "${BOOTMESG_PREFIX}${@}"
774	${ECHO} -e "${SET_COL}""${BRACKET}""[""${SUCCESS}"" OK ""${BRACKET}""]""${NORMAL}"
775	return 0
776	}
777
778	#*******************************************************************************
779	# Function - log_failure_msg "message"
780	#
781	# Purpose: Print a failure message
782	#
783	# Inputs: $@ - Message
784	#
785	# Outputs: Text output to screen
786	#
787	# Dependencies: echo
788	#
789	# Todo: logging
790	#
791	#*******************************************************************************
792	log_failure_msg() {
793	${ECHO} -n -e "${BOOTMESG_PREFIX}${@}"
794	${ECHO} -e "${SET_COL}""${BRACKET}""[""${FAILURE}"" FAIL ""${BRACKET}""]""${NORMAL}"
795	return 0
796	}
797
798	#*******************************************************************************
799	# Function - log_warning_msg "message"
800	#
801	# Purpose: print a warning message
802	#
803	# Inputs: $@ - Message
804	#
805	# Outputs: Text output to screen
806	#
807	# Dependencies: echo
808	#
809	# Todo: logging
810	#
811	#*******************************************************************************
812	log_warning_msg() {
813	${ECHO} -n -e "${BOOTMESG_PREFIX}${@}"
814	${ECHO} -e "${SET_COL}""${BRACKET}""[""${WARNING}"" WARN ""${BRACKET}""]""${NORMAL}"
815	return 0
816	}
817
818	# End $rc_base/init.d/functions

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