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source: bootscripts-standard/bootscripts/clfs/init.d/functions@ 56f753d

Last change on this file since 56f753d was 2167cfe, checked in by William Harrington <kb0iic@…>, 10 years ago
bootscripts are the scripts used for the sysvinit book.
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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}${1}"
133
134	# Message Log
135	if [ -z "${BOOTMESG}" ]
136	then
137	BOOTMESG="${1}"
138	else
139	BOOTMESG="${BOOTMESG} ${1}"
140	fi
141	}
142
143	boot_mesg_flush()
144	{
145	# Reset STRING_LENGTH for next message
146	STRING_LENGTH="0"
147	if [ "$LOGGING" ]; then
148	boot_log "${BOOTMESG}${@}"
149	BOOTMESG=""
150	fi
151	}
152
153	boot_log()
154	{
155	if [ "$LOGGING" ]; then
156	/bin/logger -p local2.info -t bootlog "${DISPLAYLOG} ${1}"
157	else
158	return 0
159	fi
160	}
161
162	echo_ok()
163	{
164	if [ "$LCD_PROG" ]; then
165	if [ "$LCD_LINES" = "2" ]; then
166	LCD_OUT2="[ OK ]"
167	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
168	else
169	LCD_OUT2="${LCD_OUT1:0:12} OK"
170	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
171	fi
172	fi
173	${ECHO} -n -e "${CURS_UP}${SET_COL}${BRACKET}[${SUCCESS} OK ${BRACKET}]"
174	${ECHO} -e "${NORMAL}"
175	BOOTMESG="${BOOTMESG} [ OK ]"
176	boot_mesg_flush
177	}
178
179	echo_failure()
180	{
181	if [ "$LCD_PROG" ]; then
182	if [ "$LCD_LINES" = "2" ]; then
183	LCD_OUT2="[ FAIL ]"
184	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
185	else
186	LCD_OUT2="${LCD_OUT1:0:10} FAIL"
187	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
188	fi
189	fi
190	${ECHO} -n -e "${CURS_UP}${SET_COL}${BRACKET}[${FAILURE} FAIL ${BRACKET}]"
191	${ECHO} -e "${NORMAL}"
192	BOOTMESG="${BOOTMESG} [ FAIL ]"
193	boot_mesg_flush
194	}
195
196	echo_warning()
197	{
198	if [ "$LCD_PROG" ]; then
199	if [ "$LCD_LINES" = "2" ]; then
200	LCD_OUT2="[ WARN ]"
201	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
202	else
203	LCD_OUT2="${LCD_OUT1:0:10} WARN"
204	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
205	fi
206	fi
207	${ECHO} -n -e "${CURS_UP}${SET_COL}${BRACKET}[${WARNING} WARN ${BRACKET}]"
208	${ECHO} -e "${NORMAL}"
209	BOOTMESG="${BOOTMESG} [ WARN ]"
210	boot_mesg_flush
211	}
212
213	print_error_msg()
214	{
215	echo_failure
216	# $i is inherited by the rc script
217	boot_log "\n\n${i} failed and exited with a return value of ${error_value}."
218	boot_mesg -n "FAILURE:\n\nYou should not be reading this error message.\n\n" ${FAILURE}
219	boot_mesg -n " It means that an unforeseen error took"
220	boot_mesg -n " place in ${i}, which exited with a return value of"
221	boot_mesg " ${error_value}.\n"
222	boot_mesg_flush
223	boot_mesg -n "If you're able to track this"
224	boot_mesg -n " error down to a bug in one of the files provided by"
225	boot_mesg -n " the CLFS book, please be so kind to inform us at"
226	boot_mesg " clfs-dev@cross-lfs.org.\n"
227	boot_mesg_flush
228	boot_mesg -n "Press Enter to continue..." ${INFO}
229	boot_mesg "" ${NORMAL}
230	read ENTER
231	}
232
233	check_script_status()
234	{
235	# $i is inherited by the rc script
236	if [ ! -f ${i} ]; then
237	boot_mesg "${i} is not a valid symlink." ${WARNING}
238	echo_warning
239	continue
240	fi
241
242	if [ ! -x ${i} ]; then
243	boot_mesg "${i} is not executable, skipping." ${WARNING}
244	echo_warning
245	continue
246	fi
247	}
248
249	evaluate_retval()
250	{
251	error_value="${?}"
252
253	if [ ${error_value} = 0 ]; then
254	echo_ok
255	else
256	echo_failure
257	fi
258
259	# This prevents the 'An Unexpected Error Has Occurred' from trivial
260	# errors.
261	return 0
262	}
263
264	print_status()
265	{
266	if [ "${#}" = "0" ]; then
267	echo "Usage: ${0} {success\|warning\|failure}"
268	return 1
269	fi
270
271	case "${1}" in
272
273	success)
274	echo_ok
275	;;
276
277	warning)
278	# Leave this extra case in because old scripts
279	# may call it this way.
280	case "${2}" in
281	running)
282	${ECHO} -e -n "${CURS_UP}"
283	${ECHO} -e -n "\\033[${STRING_LENGTH}G "
284	boot_mesg "Already running." ${WARNING}
285	echo_warning
286	;;
287	not_running)
288	${ECHO} -e -n "${CURS_UP}"
289	${ECHO} -e -n "\\033[${STRING_LENGTH}G "
290	boot_mesg "Not running." ${WARNING}
291	echo_warning
292	;;
293	not_available)
294	${ECHO} -e -n "${CURS_UP}"
295	${ECHO} -e -n "\\033[${STRING_LENGTH}G "
296	boot_mesg "Not available." ${WARNING}
297	echo_warning
298	;;
299	*)
300	# This is how it is supposed to
301	# be called
302	echo_warning
303	;;
304	esac
305	;;
306
307	failure)
308	echo_failure
309	;;
310
311	esac
312
313	}
314
315	reloadproc()
316	{
317	local pidfile=""
318	local failure=0
319
320	while true
321	do
322	case "${1}" in
323	-p)
324	pidfile="${2}"
325	shift 2
326	;;
327	-*)
328	log_failure_msg "Unknown Option: ${1}"
329	return 2
330	;;
331	*)
332	break
333	;;
334	esac
335	done
336
337	if [ "${#}" -lt "1" ]; then
338	log_failure_msg "Usage: reloadproc [-p pidfile] pathname"
339	return 2
340	fi
341
342	# This will ensure compatibility with previous CLFS Bootscripts
343	if [ -n "${PIDFILE}" ]; then
344	pidfile="${PIDFILE}"
345	fi
346
347	# Is the process running?
348	if [ -z "${pidfile}" ]; then
349	pidofproc -s "${1}"
350	else
351	pidofproc -s -p "${pidfile}" "${1}"
352	fi
353
354	if [ -n "${pidlist}" ]; then
355	for pid in ${pidlist}
356	do
357	kill -"${RELOADSIG}" "${pid}" \|\| failure="1"
358	done
359
360	(exit ${failure})
361	evaluate_retval
362
363	else
364	boot_mesg "Process ${1} not running." ${WARNING}
365	echo_warning
366	fi
367	}
368
369	statusproc()
370	{
371	local pidfile=""
372	local base=""
373	local ret=""
374
375	while true
376	do
377	case "${1}" in
378	-p)
379	pidfile="${2}"
380	shift 2
381	;;
382	-*)
383	log_failure_msg "Unknown Option: ${1}"
384	return 2
385	;;
386	*)
387	break
388	;;
389	esac
390	done
391
392	if [ "${#}" != "1" ]; then
393	shift 1
394	log_failure_msg "Usage: statusproc [-p pidfile] pathname"
395	return 2
396	fi
397
398	# Get the process basename
399	base="${1##*/}"
400
401	# This will ensure compatibility with previous CLFS Bootscripts
402	if [ -n "${PIDFILE}" ]; then
403	pidfile="${PIDFILE}"
404	fi
405
406	# Is the process running?
407	if [ -z "${pidfile}" ]; then
408	pidofproc -s "${1}"
409	else
410	pidofproc -s -p "${pidfile}" "${1}"
411	fi
412
413	# Store the return status
414	ret=$?
415
416	if [ -n "${pidlist}" ]; then
417	${ECHO} -e "${INFO}${base} is running with Process"\
418	"ID(s) ${pidlist}.${NORMAL}"
419	else
420	if [ -n "${base}" -a -e "/var/run/${base}.pid" ]; then
421	${ECHO} -e "${WARNING}${1} is not running but"\
422	"/var/run/${base}.pid exists.${NORMAL}"
423	else
424	if [ -n "${pidfile}" -a -e "${pidfile}" ]; then
425	${ECHO} -e "${WARNING}${1} is not running"\
426	"but ${pidfile} exists.${NORMAL}"
427	else
428	${ECHO} -e "${INFO}${1} is not running.${NORMAL}"
429	fi
430	fi
431	fi
432
433	# Return the status from pidofproc
434	return $ret
435	}
436
437	# The below functions are documented in the LSB-generic 2.1.0
438
439	#*******************************************************************************
440	# Function - pidofproc [-s] [-p pidfile] pathname
441	#
442	# Purpose: This function returns one or more pid(s) for a particular daemon
443	#
444	# Inputs: -p pidfile, use the specified pidfile instead of pidof
445	# pathname, path to the specified program
446	#
447	# Outputs: return 0 - Success, pid's in stdout
448	# return 1 - Program is dead, pidfile exists
449	# return 2 - Invalid or excessive number of arguments,
450	# warning in stdout
451	# return 3 - Program is not running
452	#
453	# Dependencies: pidof, echo, head
454	#
455	# Todo: Remove dependency on head
456	# This depreciates getpids
457	# Test changes to pidof
458	#
459	#*******************************************************************************
460	pidofproc()
461	{
462	local pidfile=""
463	local lpids=""
464	local silent=""
465	pidlist=""
466	while true
467	do
468	case "${1}" in
469	-p)
470	pidfile="${2}"
471	shift 2
472	;;
473
474	-s)
475	# Added for legacy opperation of getpids
476	# eliminates several '> /dev/null'
477	silent="1"
478	shift 1
479	;;
480	-*)
481	log_failure_msg "Unknown Option: ${1}"
482	return 2
483	;;
484	*)
485	break
486	;;
487	esac
488	done
489
490	if [ "${#}" != "1" ]; then
491	shift 1
492	log_failure_msg "Usage: pidofproc [-s] [-p pidfile] pathname"
493	return 2
494	fi
495
496	if [ -n "${pidfile}" ]; then
497	if [ ! -r "${pidfile}" ]; then
498	return 3 # Program is not running
499	fi
500
501	lpids=`head -n 1 ${pidfile}`
502	for pid in ${lpids}
503	do
504	if [ "${pid}" -ne "$$" -a "${pid}" -ne "${PPID}" ]; then
505	kill -0 "${pid}" 2>/dev/null &&
506	pidlist="${pidlist} ${pid}"
507	fi
508
509	if [ "${silent}" != "1" ]; then
510	echo "${pidlist}"
511	fi
512
513	test -z "${pidlist}" &&
514	# Program is dead, pidfile exists
515	return 1
516	# else
517	return 0
518	done
519
520	else
521	pidlist=`pidof -o $$ -o $PPID -x "$1"`
522	if [ "${silent}" != "1" ]; then
523	echo "${pidlist}"
524	fi
525
526	# Get provide correct running status
527	if [ -n "${pidlist}" ]; then
528	return 0
529	else
530	return 3
531	fi
532
533	fi
534
535	if [ "$?" != "0" ]; then
536	return 3 # Program is not running
537	fi
538	}
539
540	# This will ensure compatibility with previous CLFS Bootscripts
541	getpids()
542	{
543	if [ -z "${PIDFILE}" ]; then
544	pidofproc -s -p "${PIDFILE}" $@
545	else
546	pidofproc -s $@
547	fi
548	base="${1##*/}"
549	}
550
551	#*******************************************************************************
552	# Function - loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]
553	#
554	# Purpose: This runs the specified program as a daemon
555	#
556	# Inputs: -f, run the program even if it is already running
557	# -n nicelevel, specifies a nice level. See nice(1).
558	# -p pidfile, uses the specified pidfile
559	# pathname, pathname to the specified program
560	# args, arguments to pass to specified program
561	#
562	# Outputs: return 0 - Success
563	# return 2 - Invalid of excessive number of arguments,
564	# warning in stdout
565	# return 4 - Program or service status is unknown
566	#
567	# Dependencies: nice
568	#
569	# Todo: LSB says this should be called start_daemon
570	# LSB does not say that it should call evaluate_retval
571	# It checks for PIDFILE, which is deprecated.
572	# Will be removed after BLFS 6.0
573	# loadproc returns 0 if program is already running, not LSB compliant
574	#
575	#*******************************************************************************
576	loadproc()
577	{
578	local pidfile=""
579	local forcestart=""
580	local nicelevel="10"
581
582	# This will ensure compatibility with previous CLFS Bootscripts
583	if [ -n "${PIDFILE}" ]; then
584	pidfile="${PIDFILE}"
585	fi
586
587	while true
588	do
589	case "${1}" in
590	-f)
591	forcestart="1"
592	shift 1
593	;;
594	-n)
595	nicelevel="${2}"
596	shift 2
597	;;
598	-p)
599	pidfile="${2}"
600	shift 2
601	;;
602	-*)
603	log_failure_msg "Unknown Option: ${1}"
604	return 2 #invalid or excess argument(s)
605	;;
606	*)
607	break
608	;;
609	esac
610	done
611
612	if [ "${#}" = "0" ]; then
613	log_failure_msg "Usage: loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]"
614	return 2 #invalid or excess argument(s)
615	fi
616
617	if [ -z "${forcestart}" ]; then
618	if [ -z "${pidfile}" ]; then
619	pidofproc -s "${1}"
620	else
621	pidofproc -s -p "${pidfile}" "${1}"
622	fi
623
624	case "${?}" in
625	0)
626	log_warning_msg "Unable to continue: ${1} is running"
627	return 0 # 4
628	;;
629	1)
630	log_warning_msg "Unable to continue: ${pidfile} exists"
631	return 0 # 4
632	;;
633	3)
634	;;
635	*)
636	log_failure_msg "Unknown error code from pidofproc: ${?}"
637	return 4
638	;;
639	esac
640	fi
641
642	nice -n "${nicelevel}" "${@}"
643	evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
644	return 0
645	}
646
647	#*******************************************************************************
648	# Function - killproc [-p pidfile] pathname [signal]
649	#
650	# Purpose:
651	#
652	# Inputs: -p pidfile, uses the specified pidfile
653	# pathname, pathname to the specified program
654	# signal, send this signal to pathname
655	#
656	# Outputs: return 0 - Success
657	# return 2 - Invalid of excessive number of arguments,
658	# warning in stdout
659	# return 4 - Unknown Status
660	#
661	# Dependencies: kill, sleep
662	#
663	# Todo: LSB does not say that it should call evaluate_retval
664	# It checks for PIDFILE, which is deprecated.
665	# Will be removed after BLFS 6.0
666	#
667	#*******************************************************************************
668	killproc()
669	{
670	local pidfile=""
671	local killsig=TERM # default signal is SIGTERM
672	pidlist=""
673
674	# This will ensure compatibility with previous CLFS Bootscripts
675	if [ -n "${PIDFILE}" ]; then
676	pidfile="${PIDFILE}"
677	fi
678
679	while true
680	do
681	case "${1}" in
682	-p)
683	pidfile="${2}"
684	shift 2
685	;;
686	-*)
687	log_failure_msg "Unknown Option: ${1}"
688	return 2
689	;;
690	*)
691	break
692	;;
693	esac
694	done
695
696	if [ "${#}" = "2" ]; then
697	killsig="${2}"
698	elif [ "${#}" != "1" ]; then
699	shift 2
700	log_failure_msg "Usage: killproc [-p pidfile] pathname [signal]"
701	return 2
702	fi
703
704	# Is the process running?
705	if [ -z "${pidfile}" ]; then
706	pidofproc -s "${1}"
707	else
708	pidofproc -s -p "${pidfile}" "${1}"
709	fi
710
711	# If running, send the signal
712	if [ -n "${pidlist}" ]; then
713	for pid in ${pidlist}
714	do
715	kill -${killsig} ${pid} 2>/dev/null
716
717	# Wait up to 3 seconds, for ${pid} to terminate
718	case "${killsig}" in
719	TERM\|SIGTERM\|KILL\|SIGKILL)
720	# sleep in 1/10ths of seconds and
721	# multiply KILLDELAY by 10
722	local dtime="${KILLDELAY}0"
723	while [ "${dtime}" != "0" ]
724	do
725	kill -0 ${pid} 2>/dev/null \|\| break
726	sleep 0.1
727	dtime=$(( ${dtime} - 1))
728	done
729	# If ${pid} is still running, kill it
730	kill -0 ${pid} 2>/dev/null && kill -KILL ${pid} 2>/dev/null
731	;;
732	esac
733	done
734
735	# Check if the process is still running if we tried to stop it
736	case "${killsig}" in
737	TERM\|SIGTERM\|KILL\|SIGKILL)
738	if [ -z "${pidfile}" ]; then
739	pidofproc -s "${1}"
740	else
741	pidofproc -s -p "${pidfile}" "${1}"
742	fi
743
744	# Program was terminated
745	if [ "$?" != "0" ]; then
746	# Remove the pidfile if necessary
747	if [ -f "${pidfile}" ]; then
748	rm -f "${pidfile}"
749	fi
750	echo_ok
751	return 0
752	else # Program is still running
753	echo_failure
754	return 4 # Unknown Status
755	fi
756	;;
757	*)
758	# Just see if the kill returned successfully
759	evaluate_retval
760	;;
761	esac
762	else # process not running
763	print_status warning not_running
764	fi
765	}
766
767
768	#*******************************************************************************
769	# Function - log_success_msg "message"
770	#
771	# Purpose: Print a success message
772	#
773	# Inputs: $@ - Message
774	#
775	# Outputs: Text output to screen
776	#
777	# Dependencies: echo
778	#
779	# Todo: logging
780	#
781	#*******************************************************************************
782	log_success_msg()
783	{
784	${ECHO} -n -e "${BOOTMESG_PREFIX}${@}"
785	${ECHO} -e "${SET_COL}""${BRACKET}""[""${SUCCESS}"" OK ""${BRACKET}""]""${NORMAL}"
786	return 0
787	}
788
789	#*******************************************************************************
790	# Function - log_failure_msg "message"
791	#
792	# Purpose: Print a failure message
793	#
794	# Inputs: $@ - Message
795	#
796	# Outputs: Text output to screen
797	#
798	# Dependencies: echo
799	#
800	# Todo: logging
801	#
802	#*******************************************************************************
803	log_failure_msg() {
804	${ECHO} -n -e "${BOOTMESG_PREFIX}${@}"
805	${ECHO} -e "${SET_COL}""${BRACKET}""[""${FAILURE}"" FAIL ""${BRACKET}""]""${NORMAL}"
806	return 0
807	}
808
809	#*******************************************************************************
810	# Function - log_warning_msg "message"
811	#
812	# Purpose: print a warning message
813	#
814	# Inputs: $@ - Message
815	#
816	# Outputs: Text output to screen
817	#
818	# Dependencies: echo
819	#
820	# Todo: logging
821	#
822	#*******************************************************************************
823	log_warning_msg() {
824	${ECHO} -n -e "${BOOTMESG_PREFIX}${@}"
825	${ECHO} -e "${SET_COL}""${BRACKET}""[""${WARNING}"" WARN ""${BRACKET}""]""${NORMAL}"
826	return 0
827	}
828
829	# End $rc_base/init.d/functions

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