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source: bootscripts/lfs/init.d/functions@ a7e64f3

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Last change on this file since a7e64f3 was a6ede08, checked in by Jim Gifford <clfs@…>, 19 years ago
r3512@server: jim \| 2006-05-15 16:13:26 -0700 Updated LCD Support
Property mode set to `100644`
File size: 15.8 KB

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1	#!/bin/sh
2	########################################################################
3	# Begin $rc_base/init.d/functions
4	#
5	# Description : Run Level Control Functions
6	#
7	# Authors : Gerard Beekmans - gerard@linuxfromscratch.org
8	#
9	# Version : 00.00
10	#
11	# Notes : With code based on Matthias Benkmann's simpleinit-msb
12	# http://winterdrache.de/linux/newboot/index.html
13	#
14	########################################################################
15
16	if [ -e /etc/sysconfig/lcd ]; then
17	if [ -e /dev/lcd ]; then
18	source /etc/sysconfig/lcd
19	fi
20	fi
21
22	## Environmental setup
23	# Setup default values for environment
24	umask 022
25	export PATH="/bin:/usr/bin:/sbin:/usr/sbin"
26
27	# Signal sent to running processes to refresh their configuration
28	RELOADSIG="HUP"
29
30	# Number of seconds between STOPSIG and FALLBACK when stopping processes
31	KILLDELAY="3"
32
33	## Screen Dimensions
34	# Find current screen size
35	if [ -z "${COLUMNS}" ]; then
36	COLUMNS=$(stty size)
37	COLUMNS=${COLUMNS##* }
38	fi
39
40	# When using remote connections, such as a serial port, stty size returns 0
41	if [ "${COLUMNS}" = "0" ]; then
42	COLUMNS=80
43	fi
44
45	## Measurements for positioning result messages
46	COL=$((${COLUMNS} - 8))
47	WCOL=$((${COL} - 2))
48
49	## Set Cursor Position Commands, used via echo -e
50	SET_COL="\\033[${COL}G" # at the $COL char
51	SET_WCOL="\\033[${WCOL}G" # at the $WCOL char
52	CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char
53
54	## Set color commands, used via echo -e
55	# Please consult `man console_codes for more information
56	# under the "ECMA-48 Set Graphics Rendition" section
57	#
58	# Warning: when switching from a 8bit to a 9bit font,
59	# the linux console will reinterpret the bold (1;) to
60	# the top 256 glyphs of the 9bit font. This does
61	# not affect framebuffer consoles
62	NORMAL="\\033[0;39m" # Standard console grey
63	SUCCESS="\\033[1;32m" # Success is green
64	WARNING="\\033[1;33m" # Warnings are yellow
65	FAILURE="\\033[1;31m" # Failures are red
66	INFO="\\033[1;36m" # Information is light cyan
67	BRACKET="\\033[1;34m" # Brackets are blue
68
69	STRING_LENGTH="0" # the length of the current message
70
71	#*******************************************************************************
72	# Function - boot_mesg()
73	#
74	# Purpose: Sending information from bootup scripts to the console
75	#
76	# Inputs: $1 is the message
77	# $2 is the colorcode for the console
78	#
79	# Outputs: Standard Output
80	#
81	# Dependencies: - sed for parsing strings.
82	# - grep for counting string length.
83	#
84	# Todo:
85	#*******************************************************************************
86	boot_mesg()
87	{
88	local ECHOPARM=""
89
90	if [ "$LCD_PROG" ]; then
91	LCD_OUT1="${1:0:$LCD_CHAR}"
92	$LCD_PROG "$LCD_OUT1" > /dev/null 2>&1
93	fi
94
95	while true
96	do
97	case "${1}" in
98	-n)
99	ECHOPARM=" -n "
100	shift 1
101	;;
102	-*)
103	echo "Unknown Option: ${1}"
104	return 1
105	;;
106	*)
107	break
108	;;
109	esac
110	done
111
112	## Figure out the length of what is to be printed to be used
113	## for warning messges.
114	STRING_LENGTH="`echo "${1}" \| sed \
115	-e 's,.,.,g' -e 'l 1' \| grep -c \$`"
116
117	# Print the message to the screen
118	echo ${ECHOPARM} -e "${2}${1}"
119
120	}
121
122	boot_mesg_flush()
123	{
124	# Reset STRING_LENGTH for next message
125	STRING_LENGTH="0"
126	}
127
128	boot_log()
129	{
130	# Left in for backwards compatibility
131	echo -n ""
132	}
133
134	echo_ok()
135	{
136	echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${SUCCESS} OK ${BRACKET}]"
137	echo -e "${NORMAL}"
138	boot_mesg_flush "[ OK ]"
139	if [ "$LCD_PROG" ]; then
140	if [ "$LCD_LINES" = "2" ]; then
141	LCD_OUT2="[ OK ]"
142	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
143	else
144	LCD_OUT2="${LCD_OUT1:0:12} OK"
145	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
146	fi
147	fi
148	}
149
150	echo_failure()
151	{
152	echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${FAILURE} FAIL ${BRACKET}]"
153	echo -e "${NORMAL}"
154	boot_mesg_flush "[ FAIL ]"
155	if [ "$LCD_PROG" ]; then
156	if [ "$LCD_LINES" = "2" ]; then
157	LCD_OUT2="[ FAIL ]"
158	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
159	else
160	LCD_OUT2="${LCD_OUT1:0:10} FAIL"
161	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
162	fi
163	fi
164	}
165
166	echo_warning()
167	{
168	echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${WARNING} WARN ${BRACKET}]"
169	echo -e "${NORMAL}"
170	if [ "$LCD_PROG" ]; then
171	if [ "$LCD_LINES" = "2" ]; then
172	LCD_OUT2="[ WARN ]"
173	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
174	else
175	LCD_OUT2="${LCD_OUT1:0:10} WARN"
176	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
177	fi
178	fi
179	boot_mesg_flush "[ WARN ]"
180	}
181
182	print_error_msg()
183	{
184	echo_failure
185	# $i is inherited by the rc script
186	boot_log "\n\n${i} failed and exited with a return value of ${error_value}."
187	boot_mesg_flush
188	boot_mesg -n "FAILURE:\n\nYou should not be reading this error message.\n\n" ${FAILURE}
189	boot_mesg -n " It means that an unforeseen error took"
190	boot_mesg -n " place in ${i}, which exited with a return value of"
191	boot_mesg " ${error_value}.\n"
192	boot_mesg_flush
193	boot_mesg -n "If you're able to track this"
194	boot_mesg -n " error down to a bug in one of the files provided by"
195	boot_mesg -n " the LFS book, please be so kind to inform us at"
196	boot_mesg " lfs-dev@linuxfromscratch.org.\n"
197	boot_mesg_flush
198	boot_mesg -n "Press Enter to continue..." ${INFO}
199	boot_mesg "" ${NORMAL}
200	if [ "$LCD_PROG" ]; then
201	sleep 10
202	else
203	read ENTER
204	fi
205	}
206
207	check_script_status()
208	{
209	# $i is inherited by the rc script
210	if [ ! -f ${i} ]; then
211	boot_mesg "${i} is not a valid symlink." ${WARNING}
212	echo_warning
213	continue
214	fi
215
216	if [ ! -x ${i} ]; then
217	boot_mesg "${i} is not executable, skipping." ${WARNING}
218	echo_warning
219	continue
220	fi
221	}
222
223	evaluate_retval()
224	{
225	error_value="${?}"
226
227	if [ ${error_value} = 0 ]; then
228	echo_ok
229	else
230	echo_failure
231	fi
232
233	# This prevents the 'An Unexpected Error Has Occurred' from trivial
234	# errors.
235	return 0
236	}
237
238	print_status()
239	{
240	if [ "${#}" = "0" ]; then
241	echo "Usage: ${0} {success\|warning\|failure}"
242	return 1
243	fi
244
245	# boot_mesg_flush
246	# echo_warning
247
248	case "${1}" in
249
250	success)
251	echo_ok
252	;;
253
254	warning)
255	# Leave this extra case in because old scripts
256	# may call it this way.
257	case "${2}" in
258	running)
259	echo -e -n "${CURS_UP}"
260	echo -e -n "\\033[${STRING_LENGTH}G "
261	boot_mesg "Already running." ${WARNING}
262	echo_warning
263	;;
264	not_running)
265	echo -e -n "${CURS_UP}"
266	echo -e -n "\\033[${STRING_LENGTH}G "
267	boot_mesg "Not running." ${WARNING}
268	echo_warning
269	;;
270	not_available)
271	echo -e -n "${CURS_UP}"
272	echo -e -n "\\033[${STRING_LENGTH}G "
273	boot_mesg "Not available." ${WARNING}
274	echo_warning
275	;;
276	*)
277	# This is how it is supposed to
278	# be called
279	echo_warning
280	;;
281	esac
282	;;
283
284	failure)
285	echo_failure
286	;;
287
288	esac
289
290	}
291
292	reloadproc()
293	{
294	if [ "${#}" = "0" ]; then
295	echo "Usage: reloadproc [{program}]"
296	exit 1
297	fi
298
299	getpids "${1}"
300
301	if [ -n "${pidlist}" ]; then
302	failure="0"
303	for pid in ${pidlist}
304	do
305	kill -"${RELOADSIG}" "${pid}" \|\| failure="1"
306	done
307
308	(exit ${failure})
309	evaluate_retval
310
311	else
312	boot_mesg "Process ${1} not running." ${WARNING}
313	echo_warning
314	fi
315	}
316
317	statusproc()
318	{
319	if [ "${#}" = "0" ]
320	then
321	echo "Usage: statusproc {program}"
322	exit 1
323	fi
324
325	getpids "${1}"
326
327	if [ -n "${pidlist}" ]; then
328	echo -e "${INFO}${base} is running with Process"\
329	"ID(s) ${pidlist}.${NORMAL}"
330	else
331	if [ -n "${base}" -a -e "/var/run/${base}.pid" ]; then
332	echo -e "${WARNING}${1} is not running but"\
333	"/var/run/${base}.pid exists.${NORMAL}"
334	else
335	if [ -n "${PIDFILE}" -a -e "${PIDFILE}" ]; then
336	echo -e "${WARNING}${1} is not running"\
337	"but ${PIDFILE} exists.${NORMAL}"
338	else
339	echo -e "${INFO}${1} is not running.${NORMAL}"
340	fi
341	fi
342	fi
343	}
344
345	# The below functions are documented in the LSB-generic 2.1.0
346
347	#*******************************************************************************
348	# Function - pidofproc [-s] [-p pidfile] pathname
349	#
350	# Purpose: This function returns one or more pid(s) for a particular daemon
351	#
352	# Inputs: -p pidfile, use the specified pidfile instead of pidof
353	# pathname, path to the specified program
354	#
355	# Outputs: return 0 - Success, pid's in stdout
356	# return 1 - Program is dead, pidfile exists
357	# return 2 - Invalid or excessive number of arguments,
358	# warning in stdout
359	# return 3 - Program is not running
360	#
361	# Dependencies: pidof, echo, head
362	#
363	# Todo: Remove dependency on head
364	# This depreciates getpids
365	# Test changes to pidof
366	#
367	#*******************************************************************************
368	pidofproc()
369	{
370	local pidfile=""
371	local lpids=""
372	local silent=""
373	pidlist=""
374	while true
375	do
376	case "${1}" in
377	-p)
378	pidfile="${2}"
379	shift 2
380	;;
381
382	-s)
383	# Added for legacy opperation of getpids
384	# eliminates several '> /dev/null'
385	silent="1"
386	shift 1
387	;;
388	-*)
389	log_failure_msg "Unknown Option: ${1}"
390	return 2
391	;;
392	*)
393	break
394	;;
395	esac
396	done
397
398	if [ "${#}" != "1" ]; then
399	shift 1
400	log_failure_msg "Usage: pidofproc [-s] [-p pidfile] pathname"
401	return 2
402	fi
403
404	if [ -n "${pidfile}" ]; then
405	if [ ! -r "${pidfile}" ]; then
406	return 3 # Program is not running
407	fi
408
409	lpids=`head -n 1 ${pidfile}`
410	for pid in ${lpids}
411	do
412	if [ "${pid}" -ne "$$" -a "${pid}" -ne "${PPID}" ]; then
413	kill -0 "${pid}" > /dev/null &&
414	pidlist="${pidlist} ${pid}"
415	fi
416
417	if [ "${silent}" -ne "1" ]; then
418	echo "${pidlist}"
419	fi
420
421	test -z "${pidlist}" &&
422	# Program is dead, pidfile exists
423	return 1
424	# else
425	return 0
426	done
427
428	else
429	pidlist=`pidof -o $$ -o $PPID -x "$1"`
430	if [ "x${silent}" != "x1" ]; then
431	echo "${pidlist}"
432	fi
433
434	# Get provide correct running status
435	if [ -n "${pidlist}" ]; then
436	return 0
437	else
438	return 3
439	fi
440
441	fi
442
443	if [ "$?" != "0" ]; then
444	return 3 # Program is not running
445	fi
446	}
447
448	# This will ensure compatibility with previous LFS Bootscripts
449	getpids()
450	{
451	if [ -z "${PIDFILE}" ]; then
452	pidofproc -s -p "${PIDFILE}" $@
453	else
454	pidofproc -s $@
455	fi
456	base="${1##*/}"
457	}
458
459	#*******************************************************************************
460	# Function - loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]
461	#
462	# Purpose: This runs the specified program as a daemon
463	#
464	# Inputs: -f, run the program even if it is already running
465	# -n nicelevel, specifies a nice level. See nice(1).
466	# -p pidfile, uses the specified pidfile
467	# pathname, pathname to the specified program
468	# args, arguments to pass to specified program
469	#
470	# Outputs: return 0 - Success
471	# return 2 - Invalid of excessive number of arguments,
472	# warning in stdout
473	# return 4 - Program or service status is unknown
474	#
475	# Dependencies: nice
476	#
477	# Todo: LSB says this should be called start_daemon
478	# LSB does not say that it should call evaluate_retval
479	# It checks for PIDFILE, which is deprecated.
480	# Will be removed after BLFS 6.0
481	# loadproc returns 0 if program is already running, not LSB compliant
482	#
483	#*******************************************************************************
484	loadproc()
485	{
486	local pidfile=""
487	local forcestart=""
488	local nicelevel="10"
489
490	# This will ensure compatibility with previous LFS Bootscripts
491	if [ -n "${PIDFILE}" ]; then
492	pidfile="${PIDFILE}"
493	fi
494
495	while true
496	do
497	case "${1}" in
498	-f)
499	forcestart="1"
500	shift 1
501	;;
502	-n)
503	nicelevel="${2}"
504	shift 2
505	;;
506	-p)
507	pidfile="${2}"
508	shift 2
509	;;
510	-*)
511	log_failure_msg "Unknown Option: ${1}"
512	return 2 #invalid or excess argument(s)
513	;;
514	*)
515	break
516	;;
517	esac
518	done
519
520	if [ "${#}" = "0" ]; then
521	log_failure_msg "Usage: loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]"
522	return 2 #invalid or excess argument(s)
523	fi
524
525	if [ -z "${forcestart}" ]; then
526	if [ -z "${pidfile}" ]; then
527	pidofproc -s "${1}"
528	else
529	pidofproc -s -p "${pidfile}" "${1}"
530	fi
531
532	case "${?}" in
533	0)
534	log_warning_msg "Unable to continue: ${1} is running"
535	return 0 # 4
536	;;
537	1)
538	log_warning_msg "Unable to continue: ${pidfile} exists"
539	return 0 # 4
540	;;
541	3)
542	;;
543	*)
544	log_failure_msg "Unknown error code from pidofproc: ${?}"
545	return 4
546	;;
547	esac
548	fi
549
550	nice -n "${nicelevel}" "${@}"
551	evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
552	return 0
553	}
554
555	#*******************************************************************************
556	# Function - killproc [-p pidfile] pathname [signal]
557	#
558	# Purpose:
559	#
560	# Inputs: -p pidfile, uses the specified pidfile
561	# pathname, pathname to the specified program
562	# signal, send this signal to pathname
563	#
564	# Outputs: return 0 - Success
565	# return 2 - Invalid of excessive number of arguments,
566	# warning in stdout
567	# return 4 - Unknown Status
568	#
569	# Dependencies: kill
570	#
571	# Todo: LSB does not say that it should call evaluate_retval
572	# It checks for PIDFILE, which is deprecated.
573	# Will be removed after BLFS 6.0
574	#
575	#*******************************************************************************
576	killproc()
577	{
578	local pidfile=""
579	local killsig=""
580	pidlist=""
581
582	# This will ensure compatibility with previous LFS Bootscripts
583	if [ -n "${PIDFILE}" ]; then
584	pidfile="${PIDFILE}"
585	fi
586
587	while true
588	do
589	case "${1}" in
590	-p)
591	pidfile="${2}"
592	shift 2
593	;;
594	-*)
595	log_failure_msg "Unknown Option: ${1}"
596	return 2
597	;;
598	*)
599	break
600	;;
601	esac
602	done
603
604	if [ "${#}" = "2" ]; then
605	killsig="${2}"
606	elif [ "${#}" != "1" ]; then
607	shift 2
608	log_failure_msg "Usage: killproc [-p pidfile] pathname [signal]"
609	return 2
610	fi
611
612	if [ -z "${pidfile}" ]; then
613	pidofproc -s "${1}"
614	else
615	pidofproc -s -p "${pidfile}" "${1}"
616	fi
617
618	# Change....
619	if [ -n "${pidlist}" ]; then
620	for pid in ${pidlist}
621	do
622	kill -${killsig:-TERM} ${pid} 2>/dev/null
623	if [ -z "${killsig}" ]; then
624	# Wait up to 3 seconds, for ${pid} to terminate
625	local dtime=${KILLDELAY}
626	while [ "${dtime}" != "0" ]
627	do
628	kill -0 ${pid} 2>/dev/null \|\| break
629	sleep 1
630	dtime=$(( ${dtime} - 1))
631	done
632	# If ${pid} is still running, kill it
633	kill -0 ${pid} 2>/dev/null && kill -KILL ${pid} 2>/dev/null
634	fi
635	done
636
637	if [ -z "${killsig}" ]; then
638	pidofproc -s "${1}"
639
640	# Program was terminated
641	if [ "$?" != "0" ]; then
642	# Pidfile Exists
643	if [ -f "${pidfile}" ]; then
644	rm -f "${pidfile}"
645	fi
646	echo_ok
647	return 0
648	else # Program is still running
649	echo_failure
650	return 4 # Unknown Status
651	fi
652	else
653	if [ -z "${pidfile}" ]; then
654	pidofproc -s "${1}"
655	else
656	pidofproc -s -p "${pidfile}" "${1}"
657	fi
658	fi
659
660	evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
661
662	else
663	print_status warning not_running
664	fi
665	}
666
667
668	#*******************************************************************************
669	# Function - log_success_msg "message"
670	#
671	# Purpose: Print a success message
672	#
673	# Inputs: $@ - Message
674	#
675	# Outputs: Text output to screen
676	#
677	# Dependencies: echo
678	#
679	# Todo: logging
680	#
681	#*******************************************************************************
682	log_success_msg()
683	{
684	echo -n -e "${BOOTMESG_PREFIX}${@}"
685	echo -e "${SET_COL}""${BRACKET}""[""${SUCCESS}"" OK ""${BRACKET}""]""${NORMAL}"
686	return 0
687	}
688
689	#*******************************************************************************
690	# Function - log_failure_msg "message"
691	#
692	# Purpose: Print a failure message
693	#
694	# Inputs: $@ - Message
695	#
696	# Outputs: Text output to screen
697	#
698	# Dependencies: echo
699	#
700	# Todo: logging
701	#
702	#*******************************************************************************
703	log_failure_msg() {
704	echo -n -e "${BOOTMESG_PREFIX}${@}"
705	echo -e "${SET_COL}""${BRACKET}""[""${FAILURE}"" FAIL ""${BRACKET}""]""${NORMAL}"
706	return 0
707	}
708
709	#*******************************************************************************
710	# Function - log_warning_msg "message"
711	#
712	# Purpose: print a warning message
713	#
714	# Inputs: $@ - Message
715	#
716	# Outputs: Text output to screen
717	#
718	# Dependencies: echo
719	#
720	# Todo: logging
721	#
722	#*******************************************************************************
723	log_warning_msg() {
724	echo -n -e "${BOOTMESG_PREFIX}${@}"
725	echo -e "${SET_COL}""${BRACKET}""[""${WARNING}"" WARN ""${BRACKET}""]""${NORMAL}"
726	return 0
727	}
728
729	# End $rc_base/init.d/functions

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