diff options
| author | Sn4il <sn4il@thedroth.rocks> | 2024-09-02 15:54:35 +0300 |
|---|---|---|
| committer | Sn4il <sn4il@thedroth.rocks> | 2024-09-02 15:54:35 +0300 |
| commit | 2203e654b389586650d553251b04544a34f189bf (patch) | |
| tree | 0125b69fc70a2506c53158ba2020993a5b8985b7 /lfs-12.2-sysv/scripts/apds02.html | |
| parent | 200d528e55ca954d37769f4d143f10c9519b00e7 (diff) | |
| download | sn4il-site-2203e654b389586650d553251b04544a34f189bf.tar.gz sn4il-site-2203e654b389586650d553251b04544a34f189bf.zip | |
LFS 12.2
Diffstat (limited to 'lfs-12.2-sysv/scripts/apds02.html')
| -rw-r--r-- | lfs-12.2-sysv/scripts/apds02.html | 944 |
1 files changed, 944 insertions, 0 deletions
diff --git a/lfs-12.2-sysv/scripts/apds02.html b/lfs-12.2-sysv/scripts/apds02.html new file mode 100644 index 0000000..cd13b83 --- /dev/null +++ b/lfs-12.2-sysv/scripts/apds02.html @@ -0,0 +1,944 @@ +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" + "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd"> +<html xmlns="http://www.w3.org/1999/xhtml"> + <head> + <meta http-equiv="Content-Type" content="application/xhtml+xml; charset=utf-8" /> + <title> + D.2. /lib/lsb/init-functions + </title> + <link rel="stylesheet" type="text/css" href="../stylesheets/lfs.css" /> + <meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /> + <link rel="stylesheet" href="../stylesheets/lfs-print.css" type= + "text/css" media="print" /> + <meta name="viewport" content="width=device-width, initial-scale=1.0" /> + </head> + <body class="lfs" id="lfs-12.2"> + <div class="navheader"> + <h4> + Линукс с нуля - Версия 12.2 + </h4> + <h3> + Приложение D. Скрипты загрузки и настройки системы-20240825 + </h3> + <ul> + <li class="prev"> + <a accesskey="p" href="apds01.html" title= + "/etc/rc.d/init.d/rc">Пред.</a> + <p> + /etc/rc.d/init.d/rc + </p> + </li> + <li class="next"> + <a accesskey="n" href="apds03.html" title= + "/etc/rc.d/init.d/mountvirtfs">След.</a> + <p> + /etc/rc.d/init.d/mountvirtfs + </p> + </li> + <li class="up"> + <a accesskey="u" href="scripts.html" title= + "Приложение D. Скрипты загрузки и настройки системы-20240825">Наверх</a> + </li> + <li class="home"> + <a accesskey="h" href="../index.html" title= + "Линукс с нуля - Версия 12.2">Начало</a> + </li> + </ul> + </div> + <h1 class="sect1"> + <a id="init-functions" name="init-functions"></a>D.2. + /lib/lsb/init-functions + </h1> + <div class="wrap" lang="ru" xml:lang="ru"> + <pre class="screen">#!/bin/sh +######################################################################## +# +# Begin /lib/lsb/init-funtions +# +# Description : Run Level Control Functions +# +# Authors : Gerard Beekmans - gerard@linuxfromscratch.org +# : DJ Lucas - dj@linuxfromscratch.org +# Update : Bruce Dubbs - bdubbs@linuxfromscratch.org +# +# Version : LFS 7.0 +# +# Notes : With code based on Matthias Benkmann's simpleinit-msb +# http://winterdrache.de/linux/newboot/index.html +# +# The file should be located in /lib/lsb +# +######################################################################## + +## Environmental setup +# Setup default values for environment +umask 022 +export PATH="/bin:/usr/bin:/sbin:/usr/sbin" + +## Set color commands, used via echo +# Please consult `man console_codes for more information +# under the "ECMA-48 Set Graphics Rendition" section +# +# Warning: when switching from a 8bit to a 9bit font, +# the linux console will reinterpret the bold (1;) to +# the top 256 glyphs of the 9bit font. This does +# not affect framebuffer consoles + +NORMAL="\\033[0;39m" # Standard console grey +SUCCESS="\\033[1;32m" # Success is green +WARNING="\\033[1;33m" # Warnings are yellow +FAILURE="\\033[1;31m" # Failures are red +INFO="\\033[1;36m" # Information is light cyan +BRACKET="\\033[1;34m" # Brackets are blue + +# Use a colored prefix +BMPREFIX=" " +SUCCESS_PREFIX="${SUCCESS} * ${NORMAL} " +FAILURE_PREFIX="${FAILURE}*****${NORMAL} " +WARNING_PREFIX="${WARNING} *** ${NORMAL} " +SKIP_PREFIX="${INFO} S ${NORMAL}" + +SUCCESS_SUFFIX="${BRACKET}[${SUCCESS} OK ${BRACKET}]${NORMAL}" +FAILURE_SUFFIX="${BRACKET}[${FAILURE} FAIL ${BRACKET}]${NORMAL}" +WARNING_SUFFIX="${BRACKET}[${WARNING} WARN ${BRACKET}]${NORMAL}" +SKIP_SUFFIX="${BRACKET}[${INFO} SKIP ${BRACKET}]${NORMAL}" + +BOOTLOG=/run/bootlog +KILLDELAY=3 +SCRIPT_STAT="0" + +# Set any user specified environment variables e.g. HEADLESS +[ -r /etc/sysconfig/rc.site ] && . /etc/sysconfig/rc.site + +# If HEADLESS is set, use that. +# If file descriptor 1 or 2 (stdout and stderr) is not open or +# does not refer to a terminal, consider the script headless. +[ ! -t 1 -o ! -t 2 ] && HEADLESS=${HEADLESS:-yes} + +if [ "x$HEADLESS" != "xyes" ] +then + ## Screen Dimensions + # Find current screen size + if [ -z "${COLUMNS}" ]; then + COLUMNS=$(stty size) + COLUMNS=${COLUMNS##* } + fi +else + COLUMNS=80 +fi + +# When using remote connections, such as a serial port, stty size returns 0 +if [ "${COLUMNS}" = "0" ]; then + COLUMNS=80 +fi + +## Measurements for positioning result messages +COL=$((${COLUMNS} - 8)) +WCOL=$((${COL} - 2)) + +## Set Cursor Position Commands, used via echo +SET_COL="\\033[${COL}G" # at the $COL char +SET_WCOL="\\033[${WCOL}G" # at the $WCOL char +CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char +CURS_ZERO="\\033[0G" + +################################################################################ +# start_daemon() # +# Usage: start_daemon [-f] [-n nicelevel] [-p pidfile] pathname [args...] # +# # +# Purpose: This runs the specified program as a daemon # +# # +# Inputs: -f: (force) run the program even if it is already running. # +# -n nicelevel: specify a nice level. See 'man nice(1)'. # +# -p pidfile: use the specified file to determine PIDs. # +# pathname: the complete path to the specified program # +# args: additional arguments passed to the program (pathname) # +# # +# Return values (as defined by LSB exit codes): # +# 0 - program is running or service is OK # +# 1 - generic or unspecified error # +# 2 - invalid or excessive argument(s) # +# 5 - program is not installed # +################################################################################ +start_daemon() +{ + local force="" + local nice="0" + local pidfile="" + local pidlist="" + local retval="" + + # Process arguments + while true + do + case "${1}" in + + -f) + force="1" + shift 1 + ;; + + -n) + nice="${2}" + shift 2 + ;; + + -p) + pidfile="${2}" + shift 2 + ;; + + -*) + return 2 + ;; + + *) + program="${1}" + break + ;; + esac + done + + # Check for a valid program + if [ ! -e "${program}" ]; then return 5; fi + + # Execute + if [ -z "${force}" ]; then + if [ -z "${pidfile}" ]; then + # Determine the pid by discovery + pidlist=`pidofproc "${1}"` + retval="${?}" + else + # The PID file contains the needed PIDs + # Note that by LSB requirement, the path must be given to pidofproc, + # however, it is not used by the current implementation or standard. + pidlist=`pidofproc -p "${pidfile}" "${1}"` + retval="${?}" + fi + + # Return a value ONLY + # It is the init script's (or distribution's functions) responsibility + # to log messages! + case "${retval}" in + + 0) + # Program is already running correctly, this is a + # successful start. + return 0 + ;; + + 1) + # Program is not running, but an invalid pid file exists + # remove the pid file and continue + rm -f "${pidfile}" + ;; + + 3) + # Program is not running and no pidfile exists + # do nothing here, let start_deamon continue. + ;; + + *) + # Others as returned by status values shall not be interpreted + # and returned as an unspecified error. + return 1 + ;; + esac + fi + + # Do the start! + nice -n "${nice}" "${@}" +} + +################################################################################ +# killproc() # +# Usage: killproc [-p pidfile] pathname [signal] # +# # +# Purpose: Send control signals to running processes # +# # +# Inputs: -p pidfile, uses the specified pidfile # +# pathname, pathname to the specified program # +# signal, send this signal to pathname # +# # +# Return values (as defined by LSB exit codes): # +# 0 - program (pathname) has stopped/is already stopped or a # +# running program has been sent specified signal and stopped # +# successfully # +# 1 - generic or unspecified error # +# 2 - invalid or excessive argument(s) # +# 5 - program is not installed # +# 7 - program is not running and a signal was supplied # +################################################################################ +killproc() +{ + local pidfile + local program + local prefix + local progname + local signal="-TERM" + local fallback="-KILL" + local nosig + local pidlist + local retval + local pid + local delay="30" + local piddead + local dtime + + # Process arguments + while true; do + case "${1}" in + -p) + pidfile="${2}" + shift 2 + ;; + + *) + program="${1}" + if [ -n "${2}" ]; then + signal="${2}" + fallback="" + else + nosig=1 + fi + + # Error on additional arguments + if [ -n "${3}" ]; then + return 2 + else + break + fi + ;; + esac + done + + # Check for a valid program + if [ ! -e "${program}" ]; then return 5; fi + + # Check for a valid signal + check_signal "${signal}" + if [ "${?}" -ne "0" ]; then return 2; fi + + # Get a list of pids + if [ -z "${pidfile}" ]; then + # determine the pid by discovery + pidlist=`pidofproc "${1}"` + retval="${?}" + else + # The PID file contains the needed PIDs + # Note that by LSB requirement, the path must be given to pidofproc, + # however, it is not used by the current implementation or standard. + pidlist=`pidofproc -p "${pidfile}" "${1}"` + retval="${?}" + fi + + # Return a value ONLY + # It is the init script's (or distribution's functions) responsibility + # to log messages! + case "${retval}" in + + 0) + # Program is running correctly + # Do nothing here, let killproc continue. + ;; + + 1) + # Program is not running, but an invalid pid file exists + # Remove the pid file. + + progname=${program##*/} + + if [[ -e "/run/${progname}.pid" ]]; then + pidfile="/run/${progname}.pid" + rm -f "${pidfile}" + fi + + # This is only a success if no signal was passed. + if [ -n "${nosig}" ]; then + return 0 + else + return 7 + fi + ;; + + 3) + # Program is not running and no pidfile exists + # This is only a success if no signal was passed. + if [ -n "${nosig}" ]; then + return 0 + else + return 7 + fi + ;; + + *) + # Others as returned by status values shall not be interpreted + # and returned as an unspecified error. + return 1 + ;; + esac + + # Perform different actions for exit signals and control signals + check_sig_type "${signal}" + + if [ "${?}" -eq "0" ]; then # Signal is used to terminate the program + + # Account for empty pidlist (pid file still exists and no + # signal was given) + if [ "${pidlist}" != "" ]; then + + # Kill the list of pids + for pid in ${pidlist}; do + + kill -0 "${pid}" 2> /dev/null + + if [ "${?}" -ne "0" ]; then + # Process is dead, continue to next and assume all is well + continue + else + kill "${signal}" "${pid}" 2> /dev/null + + # Wait up to ${delay}/10 seconds to for "${pid}" to + # terminate in 10ths of a second + + while [ "${delay}" -ne "0" ]; do + kill -0 "${pid}" 2> /dev/null || piddead="1" + if [ "${piddead}" = "1" ]; then break; fi + sleep 0.1 + delay="$(( ${delay} - 1 ))" + done + + # If a fallback is set, and program is still running, then + # use the fallback + if [ -n "${fallback}" -a "${piddead}" != "1" ]; then + kill "${fallback}" "${pid}" 2> /dev/null + sleep 1 + # Check again, and fail if still running + kill -0 "${pid}" 2> /dev/null && return 1 + fi + fi + done + fi + + # Check for and remove stale PID files. + if [ -z "${pidfile}" ]; then + # Find the basename of $program + prefix=`echo "${program}" | sed 's/[^/]*$//'` + progname=`echo "${program}" | sed "s@${prefix}@@"` + + if [ -e "/run/${progname}.pid" ]; then + rm -f "/run/${progname}.pid" 2> /dev/null + fi + else + if [ -e "${pidfile}" ]; then rm -f "${pidfile}" 2> /dev/null; fi + fi + + # For signals that do not expect a program to exit, simply + # let kill do its job, and evaluate kill's return for value + + else # check_sig_type - signal is not used to terminate program + for pid in ${pidlist}; do + kill "${signal}" "${pid}" + if [ "${?}" -ne "0" ]; then return 1; fi + done + fi +} + +################################################################################ +# pidofproc() # +# Usage: pidofproc [-p pidfile] pathname # +# # +# Purpose: This function returns one or more pid(s) for a particular daemon # +# # +# Inputs: -p pidfile, use the specified pidfile instead of pidof # +# pathname, path to the specified program # +# # +# Return values (as defined by LSB status codes): # +# 0 - Success (PIDs to stdout) # +# 1 - Program is dead, PID file still exists (remaining PIDs output) # +# 3 - Program is not running (no output) # +################################################################################ +pidofproc() +{ + local pidfile + local program + local prefix + local progname + local pidlist + local lpids + local exitstatus="0" + + # Process arguments + while true; do + case "${1}" in + + -p) + pidfile="${2}" + shift 2 + ;; + + *) + program="${1}" + if [ -n "${2}" ]; then + # Too many arguments + # Since this is status, return unknown + return 4 + else + break + fi + ;; + esac + done + + # If a PID file is not specified, try and find one. + if [ -z "${pidfile}" ]; then + # Get the program's basename + prefix=`echo "${program}" | sed 's/[^/]*$//'` + + if [ -z "${prefix}" ]; then + progname="${program}" + else + progname=`echo "${program}" | sed "s@${prefix}@@"` + fi + + # If a PID file exists with that name, assume that is it. + if [ -e "/run/${progname}.pid" ]; then + pidfile="/run/${progname}.pid" + fi + fi + + # If a PID file is set and exists, use it. + if [ -n "${pidfile}" -a -e "${pidfile}" ]; then + # Use the value in the first line of the pidfile + pidlist=`/bin/head -n1 "${pidfile}"` + else + # Use pidof + pidlist=`pidof "${program}"` + fi + + # Figure out if all listed PIDs are running. + for pid in ${pidlist}; do + kill -0 ${pid} 2> /dev/null + + if [ "${?}" -eq "0" ]; then + lpids="${lpids}${pid} " + else + exitstatus="1" + fi + done + + if [ -z "${lpids}" -a ! -f "${pidfile}" ]; then + return 3 + else + echo "${lpids}" + return "${exitstatus}" + fi +} + +################################################################################ +# statusproc() # +# Usage: statusproc [-p pidfile] pathname # +# # +# Purpose: This function prints the status of a particular daemon to stdout # +# # +# Inputs: -p pidfile, use the specified pidfile instead of pidof # +# pathname, path to the specified program # +# # +# Return values: # +# 0 - Status printed # +# 1 - Input error. The daemon to check was not specified. # +################################################################################ +statusproc() +{ + local pidfile + local pidlist + + if [ "${#}" = "0" ]; then + echo "Usage: statusproc [-p pidfle] {program}" + exit 1 + fi + + # Process arguments + while true; do + case "${1}" in + + -p) + pidfile="${2}" + shift 2 + ;; + + *) + if [ -n "${2}" ]; then + echo "Too many arguments" + return 1 + else + break + fi + ;; + esac + done + + if [ -n "${pidfile}" ]; then + pidlist=`pidofproc -p "${pidfile}" $@` + else + pidlist=`pidofproc $@` + fi + + # Trim trailing blanks + pidlist=`echo "${pidlist}" | sed -r 's/ +$//'` + + base="${1##*/}" + + if [ -n "${pidlist}" ]; then + /bin/echo -e "${INFO}${base} is running with Process" \ + "ID(s) ${pidlist}.${NORMAL}" + else + if [ -n "${base}" -a -e "/run/${base}.pid" ]; then + /bin/echo -e "${WARNING}${1} is not running but" \ + "/run/${base}.pid exists.${NORMAL}" + else + if [ -n "${pidfile}" -a -e "${pidfile}" ]; then + /bin/echo -e "${WARNING}${1} is not running" \ + "but ${pidfile} exists.${NORMAL}" + else + /bin/echo -e "${INFO}${1} is not running.${NORMAL}" + fi + fi + fi +} + +################################################################################ +# timespec() # +# # +# Purpose: An internal utility function to format a timestamp # +# a boot log file. Sets the STAMP variable. # +# # +# Return value: Not used # +################################################################################ +timespec() +{ + STAMP="$(echo `date +"%b %d %T %:z"` `hostname`) " + return 0 +} + +################################################################################ +# log_success_msg() # +# Usage: log_success_msg ["message"] # +# # +# Purpose: Print a successful status message to the screen and # +# a boot log file. # +# # +# Inputs: $@ - Message # +# # +# Return values: Not used # +################################################################################ +log_success_msg() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + /bin/echo -e "${CURS_ZERO}${SUCCESS_PREFIX}${SET_COL}${SUCCESS_SUFFIX}" + else + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -e "${logmessage} OK" + fi + # Strip non-printable characters from log file + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + + timespec + /bin/echo -e "${STAMP} ${logmessage} OK" >> ${BOOTLOG} + + return 0 +} + +log_success_msg2() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + /bin/echo -e "${CURS_ZERO}${SUCCESS_PREFIX}${SET_COL}${SUCCESS_SUFFIX}" + else + echo " OK" + fi + + echo " OK" >> ${BOOTLOG} + + return 0 +} + +################################################################################ +# log_failure_msg() # +# Usage: log_failure_msg ["message"] # +# # +# Purpose: Print a failure status message to the screen and # +# a boot log file. # +# # +# Inputs: $@ - Message # +# # +# Return values: Not used # +################################################################################ +log_failure_msg() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + /bin/echo -e "${CURS_ZERO}${FAILURE_PREFIX}${SET_COL}${FAILURE_SUFFIX}" + else + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -e "${logmessage} FAIL" + fi + + # Strip non-printable characters from log file + + timespec + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -e "${STAMP} ${logmessage} FAIL" >> ${BOOTLOG} + + return 0 +} + +log_failure_msg2() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + /bin/echo -e "${CURS_ZERO}${FAILURE_PREFIX}${SET_COL}${FAILURE_SUFFIX}" + else + echo "FAIL" + fi + + echo "FAIL" >> ${BOOTLOG} + + return 0 +} + +################################################################################ +# log_warning_msg() # +# Usage: log_warning_msg ["message"] # +# # +# Purpose: Print a warning status message to the screen and # +# a boot log file. # +# # +# Return values: Not used # +################################################################################ +log_warning_msg() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + /bin/echo -e "${CURS_ZERO}${WARNING_PREFIX}${SET_COL}${WARNING_SUFFIX}" + else + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -e "${logmessage} WARN" + fi + + # Strip non-printable characters from log file + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + timespec + /bin/echo -e "${STAMP} ${logmessage} WARN" >> ${BOOTLOG} + + return 0 +} + +log_skip_msg() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + /bin/echo -e "${CURS_ZERO}${SKIP_PREFIX}${SET_COL}${SKIP_SUFFIX}" + else + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo "SKIP" + fi + + # Strip non-printable characters from log file + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo "SKIP" >> ${BOOTLOG} + + return 0 +} + +################################################################################ +# log_info_msg() # +# Usage: log_info_msg message # +# # +# Purpose: Print an information message to the screen and # +# a boot log file. Does not print a trailing newline character. # +# # +# Return values: Not used # +################################################################################ +log_info_msg() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${BMPREFIX}${@}" + else + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -n -e "${logmessage}" + fi + + # Strip non-printable characters from log file + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + timespec + /bin/echo -n -e "${STAMP} ${logmessage}" >> ${BOOTLOG} + + return 0 +} + +log_info_msg2() +{ + if [ "x$HEADLESS" != "xyes" ] + then + /bin/echo -n -e "${@}" + else + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -n -e "${logmessage}" + fi + + # Strip non-printable characters from log file + logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'` + /bin/echo -n -e "${logmessage}" >> ${BOOTLOG} + + return 0 +} + +################################################################################ +# evaluate_retval() # +# Usage: Evaluate a return value and print success or failure as appropriate # +# # +# Purpose: Convenience function to terminate an info message # +# # +# Return values: Not used # +################################################################################ +evaluate_retval() +{ + local error_value="${?}" + + if [ ${error_value} = 0 ]; then + log_success_msg2 + else + log_failure_msg2 + fi +} + +################################################################################ +# check_signal() # +# Usage: check_signal [ -{signal} ] # +# # +# Purpose: Check for a valid signal. This is not defined by any LSB draft, # +# however, it is required to check the signals to determine if the # +# signals chosen are invalid arguments to the other functions. # +# # +# Inputs: Accepts a single string value in the form of -{signal} # +# # +# Return values: # +# 0 - Success (signal is valid # +# 1 - Signal is not valid # +################################################################################ +check_signal() +{ + local valsig + + # Add error handling for invalid signals + valsig=" -ALRM -HUP -INT -KILL -PIPE -POLL -PROF -TERM -USR1 -USR2" + valsig="${valsig} -VTALRM -STKFLT -PWR -WINCH -CHLD -URG -TSTP -TTIN" + valsig="${valsig} -TTOU -STOP -CONT -ABRT -FPE -ILL -QUIT -SEGV -TRAP" + valsig="${valsig} -SYS -EMT -BUS -XCPU -XFSZ -0 -1 -2 -3 -4 -5 -6 -8 -9" + valsig="${valsig} -11 -13 -14 -15 " + + echo "${valsig}" | grep -- " ${1} " > /dev/null + + if [ "${?}" -eq "0" ]; then + return 0 + else + return 1 + fi +} + +################################################################################ +# check_sig_type() # +# Usage: check_signal [ -{signal} | {signal} ] # +# # +# Purpose: Check if signal is a program termination signal or a control signal # +# This is not defined by any LSB draft, however, it is required to # +# check the signals to determine if they are intended to end a # +# program or simply to control it. # +# # +# Inputs: Accepts a single string value in the form or -{signal} or {signal} # +# # +# Return values: # +# 0 - Signal is used for program termination # +# 1 - Signal is used for program control # +################################################################################ +check_sig_type() +{ + local valsig + + # The list of termination signals (limited to generally used items) + valsig=" -ALRM -INT -KILL -TERM -PWR -STOP -ABRT -QUIT -2 -3 -6 -9 -14 -15 " + + echo "${valsig}" | grep -- " ${1} " > /dev/null + + if [ "${?}" -eq "0" ]; then + return 0 + else + return 1 + fi +} + +################################################################################ +# wait_for_user() # +# # +# Purpose: Wait for the user to respond if not a headless system # +# # +################################################################################ +wait_for_user() +{ + # Wait for the user by default + [ "${HEADLESS=0}" = "0" ] && read ENTER + return 0 +} + +################################################################################ +# is_true() # +# # +# Purpose: Utility to test if a variable is true | yes | 1 # +# # +################################################################################ +is_true() +{ + [ "$1" = "1" ] || [ "$1" = "yes" ] || [ "$1" = "true" ] || [ "$1" = "y" ] || + [ "$1" = "t" ] +} + +# End /lib/lsb/init-functions +</pre> + </div> + <div class="navfooter"> + <ul> + <li class="prev"> + <a accesskey="p" href="apds01.html" title= + "/etc/rc.d/init.d/rc">Пред.</a> + <p> + /etc/rc.d/init.d/rc + </p> + </li> + <li class="next"> + <a accesskey="n" href="apds03.html" title= + "/etc/rc.d/init.d/mountvirtfs">След.</a> + <p> + /etc/rc.d/init.d/mountvirtfs + </p> + </li> + <li class="up"> + <a accesskey="u" href="scripts.html" title= + "Приложение D. Скрипты загрузки и настройки системы-20240825">Наверх</a> + </li> + <li class="home"> + <a accesskey="h" href="../index.html" title= + "Линукс с нуля - Версия 12.2">Начало</a> + </li> + </ul> + </div> + </body> +</html> |