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source: bootscripts/clfs/init.d/functions@ 995c17c

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Last change on this file since 995c17c was d66bf46, checked in by Jim Gifford <clfs@…>, 18 years ago
Update bootscripts to follow our standards
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[163a6701]	1	#!/bin/sh
	2	########################################################################
	3	# Begin $rc_base/init.d/functions
	4	#
	5	# Description : Run Level Control Functions
	6	#
	7	# Authors : Gerard Beekmans - gerard@linuxfromscratch.org
	8	#
	9	# Version : 00.00
	10	#
	11	# Notes : With code based on Matthias Benkmann's simpleinit-msb
	12	# http://winterdrache.de/linux/newboot/index.html
	13	#
	14	########################################################################
	15
[c6e88663]	16	if [ -e /etc/sysconfig/lcd ]; then
[2676abb]	17	if [ -e /dev/lcd ]; then
	18	source /etc/sysconfig/lcd
	19	fi
[c6e88663]	20	fi
	21
[6c32364]	22	if [ -e /etc/sysconfig/bootscripts ]; then
	23	source /etc/sysconfig/bootscripts
	24	fi
	25
[163a6701]	26	## Environmental setup
	27	# Setup default values for environment
	28	umask 022
	29	export PATH="/bin:/usr/bin:/sbin:/usr/sbin"
	30
	31	# Signal sent to running processes to refresh their configuration
	32	RELOADSIG="HUP"
	33
	34	# Number of seconds between STOPSIG and FALLBACK when stopping processes
	35	KILLDELAY="3"
	36
	37	## Screen Dimensions
	38	# Find current screen size
	39	if [ -z "${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 [ "${COLUMNS}" = "0" ]; then
	46	COLUMNS=80
	47	fi
	48
	49	## Measurements for positioning result messages
	50	COL=$((${COLUMNS} - 8))
	51	WCOL=$((${COL} - 2))
	52
	53	## Set Cursor Position Commands, used via echo -e
	54	SET_COL="\\033[${COL}G" # at the $COL char
	55	SET_WCOL="\\033[${WCOL}G" # at the $WCOL char
	56	CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char
	57
	58	## Set color commands, used via echo -e
	59	# Please consult `man console_codes for more information
	60	# under the "ECMA-48 Set Graphics Rendition" section
	61	#
	62	# Warning: when switching from a 8bit to a 9bit font,
	63	# the linux console will reinterpret the bold (1;) to
	64	# the top 256 glyphs of the 9bit font. This does
	65	# not affect framebuffer consoles
	66	NORMAL="\\033[0;39m" # Standard console grey
	67	SUCCESS="\\033[1;32m" # Success is green
	68	WARNING="\\033[1;33m" # Warnings are yellow
	69	FAILURE="\\033[1;31m" # Failures are red
	70	INFO="\\033[1;36m" # Information is light cyan
	71	BRACKET="\\033[1;34m" # Brackets are blue
	72
	73	STRING_LENGTH="0" # the length of the current message
	74
	75	#*******************************************************************************
	76	# Function - boot_mesg()
	77	#
	78	# Purpose: Sending information from bootup scripts to the console
	79	#
	80	# Inputs: $1 is the message
	81	# $2 is the colorcode for the console
	82	#
	83	# Outputs: Standard Output
	84	#
	85	# Dependencies: - sed for parsing strings.
	86	# - grep for counting string length.
	87	#
	88	# Todo:
	89	#*******************************************************************************
	90	boot_mesg()
	91	{
	92	local ECHOPARM=""
	93
[c6e88663]	94	if [ "$LCD_PROG" ]; then
	95	LCD_OUT1="${1:0:$LCD_CHAR}"
[a6ede08]	96	$LCD_PROG "$LCD_OUT1" > /dev/null 2>&1
[c6e88663]	97	fi
	98
[163a6701]	99	while true
	100	do
	101	case "${1}" in
	102	-n)
	103	ECHOPARM=" -n "
	104	shift 1
	105	;;
	106	-*)
	107	echo "Unknown Option: ${1}"
	108	return 1
	109	;;
	110	*)
	111	break
	112	;;
	113	esac
	114	done
	115
	116	## Figure out the length of what is to be printed to be used
	117	## for warning messges.
	118	STRING_LENGTH="`echo "${1}" \| sed \
	119	-e 's,.,.,g' -e 'l 1' \| grep -c \$`"
	120
	121	# Print the message to the screen
	122	echo ${ECHOPARM} -e "${2}${1}"
[00d52bd4]	123	if [ "$LOGGING" ]; then
	124	DISPLAYLOG="${1}"
	125	fi
[163a6701]	126
	127	}
	128
	129	boot_mesg_flush()
	130	{
	131	# Reset STRING_LENGTH for next message
	132	STRING_LENGTH="0"
[8953f24]	133	if [ "$LOGGING" ]; then
	134	boot_log "${BOOTMESG}${@}"
	135	fi
[163a6701]	136	}
	137
	138	boot_log()
	139	{
[8953f24]	140	if [ "$LOGGING" ]; then
[00d52bd4]	141	/bin/logger -p local2.info -t bootlog "${DISPLAYLOG} ${1}"
[8953f24]	142	else
	143	return 0
	144	fi
[163a6701]	145	}
	146
	147	echo_ok()
	148	{
	149	echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${SUCCESS} OK ${BRACKET}]"
	150	echo -e "${NORMAL}"
	151	boot_mesg_flush "[ OK ]"
[c6e88663]	152	if [ "$LCD_PROG" ]; then
[a6ede08]	153	if [ "$LCD_LINES" = "2" ]; then
	154	LCD_OUT2="[ OK ]"
	155	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
	156	else
	157	LCD_OUT2="${LCD_OUT1:0:12} OK"
	158	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
	159	fi
[c6e88663]	160	fi
[163a6701]	161	}
	162
	163	echo_failure()
	164	{
	165	echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${FAILURE} FAIL ${BRACKET}]"
	166	echo -e "${NORMAL}"
	167	boot_mesg_flush "[ FAIL ]"
[c6e88663]	168	if [ "$LCD_PROG" ]; then
[a6ede08]	169	if [ "$LCD_LINES" = "2" ]; then
	170	LCD_OUT2="[ FAIL ]"
	171	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
	172	else
	173	LCD_OUT2="${LCD_OUT1:0:10} FAIL"
	174	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
	175	fi
[c6e88663]	176	fi
[163a6701]	177	}
	178
	179	echo_warning()
	180	{
	181	echo -n -e "${CURS_UP}${SET_COL}${BRACKET}[${WARNING} WARN ${BRACKET}]"
	182	echo -e "${NORMAL}"
[c6e88663]	183	if [ "$LCD_PROG" ]; then
[a6ede08]	184	if [ "$LCD_LINES" = "2" ]; then
	185	LCD_OUT2="[ WARN ]"
	186	$LCD_PROG "$LCD_OUT1" "$LCD_OUT2" > /dev/null 2>&1
	187	else
	188	LCD_OUT2="${LCD_OUT1:0:10} WARN"
	189	$LCD_PROG "$LCD_OUT2" > /dev/null 2>&1
	190	fi
[c6e88663]	191	fi
[163a6701]	192	boot_mesg_flush "[ WARN ]"
	193	}
	194
	195	print_error_msg()
	196	{
	197	echo_failure
	198	# $i is inherited by the rc script
	199	boot_log "\n\n${i} failed and exited with a return value of ${error_value}."
	200	boot_mesg_flush
	201	boot_mesg -n "FAILURE:\n\nYou should not be reading this error message.\n\n" ${FAILURE}
	202	boot_mesg -n " It means that an unforeseen error took"
	203	boot_mesg -n " place in ${i}, which exited with a return value of"
	204	boot_mesg " ${error_value}.\n"
	205	boot_mesg_flush
	206	boot_mesg -n "If you're able to track this"
	207	boot_mesg -n " error down to a bug in one of the files provided by"
[8953f24]	208	boot_mesg -n " the CLFS book, please be so kind to inform us at"
	209	boot_mesg " clfs-dev@cross-lfs.org.\n"
[163a6701]	210	boot_mesg_flush
[6c32364]	211	if [ "$INTERACTIVE" ]; then
	212	boot_mesg -n "Press Enter to continue..." ${INFO}
	213	boot_mesg "" ${NORMAL}
	214	if [ "$LCD_PROG" ]; then
	215	sleep 10
	216	else
	217	read ENTER
	218	fi
[c6e88663]	219	fi
[163a6701]	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: ${0} {success\|warning\|failure}"
	257	return 1
	258	fi
	259
	260	# boot_mesg_flush
	261	# echo_warning
	262
	263	case "${1}" in
	264
	265	success)
	266	echo_ok
	267	;;
	268
	269	warning)
	270	# Leave this extra case in because old scripts
	271	# may call it this way.
	272	case "${2}" in
	273	running)
	274	echo -e -n "${CURS_UP}"
	275	echo -e -n "\\033[${STRING_LENGTH}G "
	276	boot_mesg "Already running." ${WARNING}
	277	echo_warning
	278	;;
	279	not_running)
	280	echo -e -n "${CURS_UP}"
	281	echo -e -n "\\033[${STRING_LENGTH}G "
	282	boot_mesg "Not running." ${WARNING}
	283	echo_warning
	284	;;
	285	not_available)
	286	echo -e -n "${CURS_UP}"
	287	echo -e -n "\\033[${STRING_LENGTH}G "
	288	boot_mesg "Not available." ${WARNING}
	289	echo_warning
	290	;;
	291	*)
	292	# This is how it is supposed to
	293	# be called
	294	echo_warning
	295	;;
	296	esac
	297	;;
	298
	299	failure)
	300	echo_failure
	301	;;
	302
	303	esac
	304
	305	}
	306
	307	reloadproc()
	308	{
	309	if [ "${#}" = "0" ]; then
	310	echo "Usage: reloadproc [{program}]"
	311	exit 1
	312	fi
	313
	314	getpids "${1}"
	315
	316	if [ -n "${pidlist}" ]; then
	317	failure="0"
	318	for pid in ${pidlist}
	319	do
	320	kill -"${RELOADSIG}" "${pid}" \|\| failure="1"
	321	done
	322
	323	(exit ${failure})
	324	evaluate_retval
	325
	326	else
	327	boot_mesg "Process ${1} not running." ${WARNING}
	328	echo_warning
	329	fi
	330	}
	331
	332	statusproc()
	333	{
	334	if [ "${#}" = "0" ]
	335	then
	336	echo "Usage: statusproc {program}"
	337	exit 1
	338	fi
	339
	340	getpids "${1}"
	341
	342	if [ -n "${pidlist}" ]; then
	343	echo -e "${INFO}${base} is running with Process"\
	344	"ID(s) ${pidlist}.${NORMAL}"
	345	else
	346	if [ -n "${base}" -a -e "/var/run/${base}.pid" ]; then
	347	echo -e "${WARNING}${1} is not running but"\
	348	"/var/run/${base}.pid exists.${NORMAL}"
	349	else
	350	if [ -n "${PIDFILE}" -a -e "${PIDFILE}" ]; then
	351	echo -e "${WARNING}${1} is not running"\
	352	"but ${PIDFILE} exists.${NORMAL}"
	353	else
	354	echo -e "${INFO}${1} is not running.${NORMAL}"
	355	fi
	356	fi
	357	fi
	358	}
	359
	360	# The below functions are documented in the LSB-generic 2.1.0
	361
	362	#*******************************************************************************
	363	# Function - pidofproc [-s] [-p pidfile] pathname
	364	#
	365	# Purpose: This function returns one or more pid(s) for a particular daemon
	366	#
	367	# Inputs: -p pidfile, use the specified pidfile instead of pidof
	368	# pathname, path to the specified program
	369	#
	370	# Outputs: return 0 - Success, pid's in stdout
	371	# return 1 - Program is dead, pidfile exists
	372	# return 2 - Invalid or excessive number of arguments,
	373	# warning in stdout
	374	# return 3 - Program is not running
	375	#
	376	# Dependencies: pidof, echo, head
	377	#
	378	# Todo: Remove dependency on head
	379	# This depreciates getpids
	380	# Test changes to pidof
	381	#
	382	#*******************************************************************************
	383	pidofproc()
	384	{
	385	local pidfile=""
	386	local lpids=""
	387	local silent=""
	388	pidlist=""
	389	while true
	390	do
	391	case "${1}" in
	392	-p)
	393	pidfile="${2}"
	394	shift 2
	395	;;
	396
	397	-s)
	398	# Added for legacy opperation of getpids
	399	# eliminates several '> /dev/null'
	400	silent="1"
	401	shift 1
	402	;;
	403	-*)
	404	log_failure_msg "Unknown Option: ${1}"
	405	return 2
	406	;;
	407	*)
	408	break
	409	;;
	410	esac
	411	done
	412
	413	if [ "${#}" != "1" ]; then
	414	shift 1
	415	log_failure_msg "Usage: pidofproc [-s] [-p pidfile] pathname"
	416	return 2
	417	fi
	418
	419	if [ -n "${pidfile}" ]; then
	420	if [ ! -r "${pidfile}" ]; then
	421	return 3 # Program is not running
	422	fi
	423
	424	lpids=`head -n 1 ${pidfile}`
	425	for pid in ${lpids}
	426	do
	427	if [ "${pid}" -ne "$$" -a "${pid}" -ne "${PPID}" ]; then
	428	kill -0 "${pid}" > /dev/null &&
	429	pidlist="${pidlist} ${pid}"
	430	fi
	431
	432	if [ "${silent}" -ne "1" ]; then
	433	echo "${pidlist}"
	434	fi
	435
	436	test -z "${pidlist}" &&
	437	# Program is dead, pidfile exists
	438	return 1
	439	# else
	440	return 0
	441	done
	442
	443	else
	444	pidlist=`pidof -o $$ -o $PPID -x "$1"`
	445	if [ "x${silent}" != "x1" ]; then
	446	echo "${pidlist}"
	447	fi
	448
	449	# Get provide correct running status
	450	if [ -n "${pidlist}" ]; then
	451	return 0
	452	else
	453	return 3
	454	fi
	455
	456	fi
	457
	458	if [ "$?" != "0" ]; then
	459	return 3 # Program is not running
	460	fi
	461	}
	462
[8953f24]	463	# This will ensure compatibility with previous CLFS Bootscripts
[163a6701]	464	getpids()
	465	{
	466	if [ -z "${PIDFILE}" ]; then
	467	pidofproc -s -p "${PIDFILE}" $@
	468	else
	469	pidofproc -s $@
	470	fi
	471	base="${1##*/}"
	472	}
	473
	474	#*******************************************************************************
	475	# Function - loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]
	476	#
	477	# Purpose: This runs the specified program as a daemon
	478	#
	479	# Inputs: -f, run the program even if it is already running
	480	# -n nicelevel, specifies a nice level. See nice(1).
	481	# -p pidfile, uses the specified pidfile
	482	# pathname, pathname to the specified program
	483	# args, arguments to pass to specified program
	484	#
	485	# Outputs: return 0 - Success
	486	# return 2 - Invalid of excessive number of arguments,
	487	# warning in stdout
	488	# return 4 - Program or service status is unknown
	489	#
	490	# Dependencies: nice
	491	#
	492	# Todo: LSB says this should be called start_daemon
	493	# LSB does not say that it should call evaluate_retval
	494	# It checks for PIDFILE, which is deprecated.
	495	# Will be removed after BLFS 6.0
	496	# loadproc returns 0 if program is already running, not LSB compliant
	497	#
	498	#*******************************************************************************
	499	loadproc()
	500	{
	501	local pidfile=""
	502	local forcestart=""
	503	local nicelevel="10"
	504
[8953f24]	505	# This will ensure compatibility with previous CLFS Bootscripts
[163a6701]	506	if [ -n "${PIDFILE}" ]; then
	507	pidfile="${PIDFILE}"
	508	fi
	509
	510	while true
	511	do
	512	case "${1}" in
	513	-f)
	514	forcestart="1"
	515	shift 1
	516	;;
	517	-n)
	518	nicelevel="${2}"
	519	shift 2
	520	;;
	521	-p)
	522	pidfile="${2}"
	523	shift 2
	524	;;
	525	-*)
	526	log_failure_msg "Unknown Option: ${1}"
	527	return 2 #invalid or excess argument(s)
	528	;;
	529	*)
	530	break
	531	;;
	532	esac
	533	done
	534
	535	if [ "${#}" = "0" ]; then
	536	log_failure_msg "Usage: loadproc [-f] [-n nicelevel] [-p pidfile] pathname [args]"
	537	return 2 #invalid or excess argument(s)
	538	fi
	539
	540	if [ -z "${forcestart}" ]; then
	541	if [ -z "${pidfile}" ]; then
	542	pidofproc -s "${1}"
	543	else
	544	pidofproc -s -p "${pidfile}" "${1}"
	545	fi
	546
	547	case "${?}" in
	548	0)
	549	log_warning_msg "Unable to continue: ${1} is running"
	550	return 0 # 4
	551	;;
	552	1)
	553	log_warning_msg "Unable to continue: ${pidfile} exists"
	554	return 0 # 4
	555	;;
	556	3)
	557	;;
	558	*)
	559	log_failure_msg "Unknown error code from pidofproc: ${?}"
	560	return 4
	561	;;
	562	esac
	563	fi
	564
	565	nice -n "${nicelevel}" "${@}"
	566	evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
	567	return 0
	568	}
	569
	570	#*******************************************************************************
	571	# Function - killproc [-p pidfile] pathname [signal]
	572	#
	573	# Purpose:
	574	#
	575	# Inputs: -p pidfile, uses the specified pidfile
	576	# pathname, pathname to the specified program
	577	# signal, send this signal to pathname
	578	#
	579	# Outputs: return 0 - Success
	580	# return 2 - Invalid of excessive number of arguments,
	581	# warning in stdout
	582	# return 4 - Unknown Status
	583	#
	584	# Dependencies: kill
	585	#
	586	# Todo: LSB does not say that it should call evaluate_retval
	587	# It checks for PIDFILE, which is deprecated.
	588	# Will be removed after BLFS 6.0
	589	#
	590	#*******************************************************************************
	591	killproc()
	592	{
	593	local pidfile=""
	594	local killsig=""
	595	pidlist=""
	596
[8953f24]	597	# This will ensure compatibility with previous CLFS Bootscripts
[163a6701]	598	if [ -n "${PIDFILE}" ]; then
	599	pidfile="${PIDFILE}"
	600	fi
	601
	602	while true
	603	do
	604	case "${1}" in
	605	-p)
	606	pidfile="${2}"
	607	shift 2
	608	;;
	609	-*)
	610	log_failure_msg "Unknown Option: ${1}"
	611	return 2
	612	;;
	613	*)
	614	break
	615	;;
	616	esac
	617	done
	618
	619	if [ "${#}" = "2" ]; then
	620	killsig="${2}"
	621	elif [ "${#}" != "1" ]; then
	622	shift 2
	623	log_failure_msg "Usage: killproc [-p pidfile] pathname [signal]"
	624	return 2
	625	fi
	626
	627	if [ -z "${pidfile}" ]; then
	628	pidofproc -s "${1}"
	629	else
	630	pidofproc -s -p "${pidfile}" "${1}"
	631	fi
	632
	633	# Change....
	634	if [ -n "${pidlist}" ]; then
	635	for pid in ${pidlist}
	636	do
	637	kill -${killsig:-TERM} ${pid} 2>/dev/null
	638	if [ -z "${killsig}" ]; then
	639	# Wait up to 3 seconds, for ${pid} to terminate
	640	local dtime=${KILLDELAY}
	641	while [ "${dtime}" != "0" ]
	642	do
	643	kill -0 ${pid} 2>/dev/null \|\| break
	644	sleep 1
	645	dtime=$(( ${dtime} - 1))
	646	done
	647	# If ${pid} is still running, kill it
	648	kill -0 ${pid} 2>/dev/null && kill -KILL ${pid} 2>/dev/null
	649	fi
	650	done
	651
	652	if [ -z "${killsig}" ]; then
	653	pidofproc -s "${1}"
	654
	655	# Program was terminated
	656	if [ "$?" != "0" ]; then
	657	# Pidfile Exists
	658	if [ -f "${pidfile}" ]; then
	659	rm -f "${pidfile}"
	660	fi
	661	echo_ok
	662	return 0
	663	else # Program is still running
	664	echo_failure
	665	return 4 # Unknown Status
	666	fi
	667	else
	668	if [ -z "${pidfile}" ]; then
	669	pidofproc -s "${1}"
	670	else
	671	pidofproc -s -p "${pidfile}" "${1}"
	672	fi
	673	fi
	674
	675	evaluate_retval # This is "Probably" not LSB compliant, but required to be compatible with older bootscripts
	676
	677	else
	678	print_status warning not_running
	679	fi
	680	}
	681
	682
	683	#*******************************************************************************
	684	# Function - log_success_msg "message"
	685	#
	686	# Purpose: Print a success message
	687	#
	688	# Inputs: $@ - Message
	689	#
	690	# Outputs: Text output to screen
	691	#
	692	# Dependencies: echo
	693	#
	694	# Todo: logging
	695	#
	696	#*******************************************************************************
	697	log_success_msg()
	698	{
	699	echo -n -e "${BOOTMESG_PREFIX}${@}"
	700	echo -e "${SET_COL}""${BRACKET}""[""${SUCCESS}"" OK ""${BRACKET}""]""${NORMAL}"
	701	return 0
	702	}
	703
	704	#*******************************************************************************
	705	# Function - log_failure_msg "message"
	706	#
	707	# Purpose: Print a failure message
	708	#
	709	# Inputs: $@ - Message
	710	#
	711	# Outputs: Text output to screen
	712	#
	713	# Dependencies: echo
	714	#
	715	# Todo: logging
	716	#
	717	#*******************************************************************************
	718	log_failure_msg() {
	719	echo -n -e "${BOOTMESG_PREFIX}${@}"
	720	echo -e "${SET_COL}""${BRACKET}""[""${FAILURE}"" FAIL ""${BRACKET}""]""${NORMAL}"
	721	return 0
	722	}
	723
	724	#*******************************************************************************
	725	# Function - log_warning_msg "message"
	726	#
	727	# Purpose: print a warning message
	728	#
	729	# Inputs: $@ - Message
	730	#
	731	# Outputs: Text output to screen
	732	#
	733	# Dependencies: echo
	734	#
	735	# Todo: logging
	736	#
	737	#*******************************************************************************
	738	log_warning_msg() {
	739	echo -n -e "${BOOTMESG_PREFIX}${@}"
	740	echo -e "${SET_COL}""${BRACKET}""[""${WARNING}"" WARN ""${BRACKET}""]""${NORMAL}"
	741	return 0
	742	}
	743
	744	# End $rc_base/init.d/functions

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