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811 lines
29 KiB
Bash
811 lines
29 KiB
Bash
#!/bin/sh
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########################################################################
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#
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# Begin /lib/lsb/init-funtions
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#
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# Description : Run Level Control Functions
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#
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# Authors : Gerard Beekmans - gerard@linuxfromscratch.org
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# : DJ Lucas - dj@linuxfromscratch.org
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# Update : Bruce Dubbs - bdubbs@linuxfromscratch.org
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#
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# Version : LFS 7.0
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#
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# Notes : With code based on Matthias Benkmann's simpleinit-msb
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# http://winterdrache.de/linux/newboot/index.html
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#
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# The file should be located in /lib/lsb
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#
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########################################################################
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## Environmental setup
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# Setup default values for environment
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umask 022
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export PATH="/bin:/usr/bin:/sbin:/usr/sbin"
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## Set color commands, used via echo
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# Please consult `man console_codes for more information
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# under the "ECMA-48 Set Graphics Rendition" section
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#
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# Warning: when switching from a 8bit to a 9bit font,
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# the linux console will reinterpret the bold (1;) to
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# the top 256 glyphs of the 9bit font. This does
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# not affect framebuffer consoles
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NORMAL="\\033[0;39m" # Standard console grey
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SUCCESS="\\033[1;32m" # Success is green
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WARNING="\\033[1;33m" # Warnings are yellow
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FAILURE="\\033[1;31m" # Failures are red
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INFO="\\033[1;36m" # Information is light cyan
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BRACKET="\\033[1;34m" # Brackets are blue
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# Use a colored prefix
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BMPREFIX=" "
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SUCCESS_PREFIX="${SUCCESS} * ${NORMAL} "
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FAILURE_PREFIX="${FAILURE}*****${NORMAL} "
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WARNING_PREFIX="${WARNING} *** ${NORMAL} "
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SKIP_PREFIX="${INFO} S ${NORMAL}"
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SUCCESS_SUFFIX="${BRACKET}[${SUCCESS} OK ${BRACKET}]${NORMAL}"
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FAILURE_SUFFIX="${BRACKET}[${FAILURE} FAIL ${BRACKET}]${NORMAL}"
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WARNING_SUFFIX="${BRACKET}[${WARNING} WARN ${BRACKET}]${NORMAL}"
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SKIP_SUFFIX="${BRACKET}[${INFO} SKIP ${BRACKET}]${NORMAL}"
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BOOTLOG=/run/bootlog
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KILLDELAY=3
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SCRIPT_STAT="0"
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# Set any user specified environment variables e.g. HEADLESS
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[ -r /etc/sysconfig/rc.site ] && . /etc/sysconfig/rc.site
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## Screen Dimensions
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# Find current screen size
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if [ -z "${COLUMNS}" ]; then
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COLUMNS=$(stty size)
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COLUMNS=${COLUMNS##* }
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fi
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# When using remote connections, such as a serial port, stty size returns 0
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if [ "${COLUMNS}" = "0" ]; then
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COLUMNS=80
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fi
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## Measurements for positioning result messages
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COL=$((${COLUMNS} - 8))
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WCOL=$((${COL} - 2))
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## Set Cursor Position Commands, used via echo
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SET_COL="\\033[${COL}G" # at the $COL char
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SET_WCOL="\\033[${WCOL}G" # at the $WCOL char
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CURS_UP="\\033[1A\\033[0G" # Up one line, at the 0'th char
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CURS_ZERO="\\033[0G"
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################################################################################
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# start_daemon() #
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# Usage: start_daemon [-f] [-n nicelevel] [-p pidfile] pathname [args...] #
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# #
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# Purpose: This runs the specified program as a daemon #
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# #
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# Inputs: -f: (force) run the program even if it is already running. #
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# -n nicelevel: specify a nice level. See 'man nice(1)'. #
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# -p pidfile: use the specified file to determine PIDs. #
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# pathname: the complete path to the specified program #
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# args: additional arguments passed to the program (pathname) #
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# #
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# Return values (as defined by LSB exit codes): #
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# 0 - program is running or service is OK #
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# 1 - generic or unspecified error #
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# 2 - invalid or excessive argument(s) #
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# 5 - program is not installed #
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################################################################################
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start_daemon()
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{
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local force=""
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local nice="0"
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local pidfile=""
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local pidlist=""
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local retval=""
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# Process arguments
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while true
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do
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case "${1}" in
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-f)
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force="1"
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shift 1
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;;
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-n)
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nice="${2}"
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shift 2
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;;
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-p)
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pidfile="${2}"
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shift 2
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;;
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-*)
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return 2
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;;
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*)
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program="${1}"
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break
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;;
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esac
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done
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# Check for a valid program
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if [ ! -e "${program}" ]; then return 5; fi
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# Execute
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if [ -z "${force}" ]; then
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if [ -z "${pidfile}" ]; then
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# Determine the pid by discovery
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pidlist=`pidofproc "${1}"`
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retval="${?}"
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else
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# The PID file contains the needed PIDs
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# Note that by LSB requirement, the path must be given to pidofproc,
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# however, it is not used by the current implementation or standard.
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pidlist=`pidofproc -p "${pidfile}" "${1}"`
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retval="${?}"
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fi
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# Return a value ONLY
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# It is the init script's (or distribution's functions) responsibility
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# to log messages!
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case "${retval}" in
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0)
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# Program is already running correctly, this is a
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# successful start.
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return 0
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;;
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1)
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# Program is not running, but an invalid pid file exists
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# remove the pid file and continue
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rm -f "${pidfile}"
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;;
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3)
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# Program is not running and no pidfile exists
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# do nothing here, let start_deamon continue.
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;;
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*)
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# Others as returned by status values shall not be interpreted
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# and returned as an unspecified error.
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return 1
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;;
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esac
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fi
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# Do the start!
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nice -n "${nice}" "${@}"
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}
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################################################################################
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# killproc() #
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# Usage: killproc [-p pidfile] pathname [signal] #
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# #
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# Purpose: Send control signals to running processes #
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# #
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# Inputs: -p pidfile, uses the specified pidfile #
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# pathname, pathname to the specified program #
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# signal, send this signal to pathname #
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# #
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# Return values (as defined by LSB exit codes): #
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# 0 - program (pathname) has stopped/is already stopped or a #
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# running program has been sent specified signal and stopped #
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# successfully #
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# 1 - generic or unspecified error #
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# 2 - invalid or excessive argument(s) #
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# 5 - program is not installed #
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# 7 - program is not running and a signal was supplied #
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################################################################################
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killproc()
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{
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local pidfile
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local program
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local prefix
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local progname
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local signal="-TERM"
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local fallback="-KILL"
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local nosig
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local pidlist
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local retval
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local pid
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local delay="30"
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local piddead
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local dtime
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# Process arguments
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while true; do
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case "${1}" in
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-p)
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pidfile="${2}"
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shift 2
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;;
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*)
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program="${1}"
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if [ -n "${2}" ]; then
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signal="${2}"
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fallback=""
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else
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nosig=1
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fi
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# Error on additional arguments
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if [ -n "${3}" ]; then
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return 2
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else
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break
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fi
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;;
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esac
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done
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# Check for a valid program
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if [ ! -e "${program}" ]; then return 5; fi
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# Check for a valid signal
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check_signal "${signal}"
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if [ "${?}" -ne "0" ]; then return 2; fi
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# Get a list of pids
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if [ -z "${pidfile}" ]; then
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# determine the pid by discovery
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pidlist=`pidofproc "${1}"`
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retval="${?}"
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else
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# The PID file contains the needed PIDs
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# Note that by LSB requirement, the path must be given to pidofproc,
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# however, it is not used by the current implementation or standard.
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pidlist=`pidofproc -p "${pidfile}" "${1}"`
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retval="${?}"
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fi
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# Return a value ONLY
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# It is the init script's (or distribution's functions) responsibility
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# to log messages!
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case "${retval}" in
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0)
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# Program is running correctly
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# Do nothing here, let killproc continue.
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;;
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1)
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# Program is not running, but an invalid pid file exists
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# Remove the pid file.
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progname=${program##*/}
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if [[ -e "/run/${progname}.pid" ]]; then
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pidfile="/run/${progname}.pid"
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rm -f "${pidfile}"
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fi
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# This is only a success if no signal was passed.
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if [ -n "${nosig}" ]; then
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return 0
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else
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return 7
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fi
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;;
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3)
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# Program is not running and no pidfile exists
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# This is only a success if no signal was passed.
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if [ -n "${nosig}" ]; then
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return 0
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else
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return 7
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fi
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;;
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*)
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# Others as returned by status values shall not be interpreted
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# and returned as an unspecified error.
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return 1
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;;
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esac
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# Perform different actions for exit signals and control signals
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check_sig_type "${signal}"
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if [ "${?}" -eq "0" ]; then # Signal is used to terminate the program
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# Account for empty pidlist (pid file still exists and no
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# signal was given)
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if [ "${pidlist}" != "" ]; then
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# Kill the list of pids
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for pid in ${pidlist}; do
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kill -0 "${pid}" 2> /dev/null
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if [ "${?}" -ne "0" ]; then
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# Process is dead, continue to next and assume all is well
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continue
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else
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kill "${signal}" "${pid}" 2> /dev/null
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# Wait up to ${delay}/10 seconds to for "${pid}" to
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# terminate in 10ths of a second
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while [ "${delay}" -ne "0" ]; do
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kill -0 "${pid}" 2> /dev/null || piddead="1"
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if [ "${piddead}" = "1" ]; then break; fi
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sleep 0.1
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delay="$(( ${delay} - 1 ))"
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done
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# If a fallback is set, and program is still running, then
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# use the fallback
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if [ -n "${fallback}" -a "${piddead}" != "1" ]; then
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kill "${fallback}" "${pid}" 2> /dev/null
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sleep 1
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# Check again, and fail if still running
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kill -0 "${pid}" 2> /dev/null && return 1
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fi
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fi
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done
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fi
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# Check for and remove stale PID files.
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if [ -z "${pidfile}" ]; then
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# Find the basename of $program
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prefix=`echo "${program}" | sed 's/[^/]*$//'`
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progname=`echo "${program}" | sed "s@${prefix}@@"`
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if [ -e "/run/${progname}.pid" ]; then
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rm -f "/run/${progname}.pid" 2> /dev/null
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fi
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else
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if [ -e "${pidfile}" ]; then rm -f "${pidfile}" 2> /dev/null; fi
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fi
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# For signals that do not expect a program to exit, simply
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# let kill do its job, and evaluate kill's return for value
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else # check_sig_type - signal is not used to terminate program
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for pid in ${pidlist}; do
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kill "${signal}" "${pid}"
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if [ "${?}" -ne "0" ]; then return 1; fi
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done
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fi
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}
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################################################################################
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# pidofproc() #
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# Usage: pidofproc [-p pidfile] pathname #
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# #
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# Purpose: This function returns one or more pid(s) for a particular daemon #
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# #
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# Inputs: -p pidfile, use the specified pidfile instead of pidof #
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# pathname, path to the specified program #
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# #
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# Return values (as defined by LSB status codes): #
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# 0 - Success (PIDs to stdout) #
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# 1 - Program is dead, PID file still exists (remaining PIDs output) #
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# 3 - Program is not running (no output) #
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################################################################################
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pidofproc()
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{
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local pidfile
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local program
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local prefix
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local progname
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local pidlist
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local lpids
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local exitstatus="0"
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# Process arguments
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while true; do
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case "${1}" in
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-p)
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pidfile="${2}"
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shift 2
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;;
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*)
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program="${1}"
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if [ -n "${2}" ]; then
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# Too many arguments
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# Since this is status, return unknown
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return 4
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else
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break
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fi
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;;
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esac
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done
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# If a PID file is not specified, try and find one.
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if [ -z "${pidfile}" ]; then
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# Get the program's basename
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prefix=`echo "${program}" | sed 's/[^/]*$//'`
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if [ -z "${prefix}" ]; then
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progname="${program}"
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else
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progname=`echo "${program}" | sed "s@${prefix}@@"`
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fi
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# If a PID file exists with that name, assume that is it.
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if [ -e "/run/${progname}.pid" ]; then
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pidfile="/run/${progname}.pid"
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fi
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fi
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# If a PID file is set and exists, use it.
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if [ -n "${pidfile}" -a -e "${pidfile}" ]; then
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# Use the value in the first line of the pidfile
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pidlist=`/bin/head -n1 "${pidfile}"`
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# This can optionally be written as 'sed 1q' to repalce 'head -n1'
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# should LFS move /bin/head to /usr/bin/head
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else
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# Use pidof
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pidlist=`pidof "${program}"`
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fi
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# Figure out if all listed PIDs are running.
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for pid in ${pidlist}; do
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kill -0 ${pid} 2> /dev/null
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if [ "${?}" -eq "0" ]; then
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lpids="${lpids}${pid} "
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else
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exitstatus="1"
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fi
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done
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if [ -z "${lpids}" -a ! -f "${pidfile}" ]; then
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return 3
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else
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echo "${lpids}"
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return "${exitstatus}"
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fi
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}
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################################################################################
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# statusproc() #
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# Usage: statusproc [-p pidfile] pathname #
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# #
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# Purpose: This function prints the status of a particular daemon to stdout #
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# #
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# Inputs: -p pidfile, use the specified pidfile instead of pidof #
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# pathname, path to the specified program #
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# #
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# Return values: #
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# 0 - Status printed #
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# 1 - Input error. The daemon to check was not specified. #
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################################################################################
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statusproc()
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{
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local pidfile
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local pidlist
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if [ "${#}" = "0" ]; then
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echo "Usage: statusproc [-p pidfle] {program}"
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exit 1
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fi
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# Process arguments
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while true; do
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case "${1}" in
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-p)
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pidfile="${2}"
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shift 2
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;;
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*)
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if [ -n "${2}" ]; then
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echo "Too many arguments"
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return 1
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else
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break
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fi
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;;
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esac
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done
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if [ -n "${pidfile}" ]; then
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pidlist=`pidofproc -p "${pidfile}" $@`
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else
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pidlist=`pidofproc $@`
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fi
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# Trim trailing blanks
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pidlist=`echo "${pidlist}" | sed -r 's/ +$//'`
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base="${1##*/}"
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if [ -n "${pidlist}" ]; then
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/bin/echo -e "${INFO}${base} is running with Process" \
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"ID(s) ${pidlist}.${NORMAL}"
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else
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if [ -n "${base}" -a -e "/run/${base}.pid" ]; then
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/bin/echo -e "${WARNING}${1} is not running but" \
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"/run/${base}.pid exists.${NORMAL}"
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else
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if [ -n "${pidfile}" -a -e "${pidfile}" ]; then
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/bin/echo -e "${WARNING}${1} is not running" \
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"but ${pidfile} exists.${NORMAL}"
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else
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/bin/echo -e "${INFO}${1} is not running.${NORMAL}"
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fi
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fi
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fi
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}
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################################################################################
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# timespec() #
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# #
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# Purpose: An internal utility function to format a timestamp #
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# a boot log file. Sets the STAMP variable. #
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# #
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# Return value: Not used #
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################################################################################
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timespec()
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{
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STAMP="$(echo `date +"%b %d %T %:z"` `hostname`) "
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return 0
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}
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################################################################################
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# log_success_msg() #
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# Usage: log_success_msg ["message"] #
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# #
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# Purpose: Print a successful status message to the screen and #
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# a boot log file. #
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# #
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# Inputs: $@ - Message #
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# #
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# Return values: Not used #
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################################################################################
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log_success_msg()
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{
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/bin/echo -n -e "${BMPREFIX}${@}"
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/bin/echo -e "${CURS_ZERO}${SUCCESS_PREFIX}${SET_COL}${SUCCESS_SUFFIX}"
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# Strip non-printable characters from log file
|
|
logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
|
|
|
|
timespec
|
|
/bin/echo -e "${STAMP} ${logmessage} OK" >> ${BOOTLOG}
|
|
|
|
return 0
|
|
}
|
|
|
|
log_success_msg2()
|
|
{
|
|
/bin/echo -n -e "${BMPREFIX}${@}"
|
|
/bin/echo -e "${CURS_ZERO}${SUCCESS_PREFIX}${SET_COL}${SUCCESS_SUFFIX}"
|
|
|
|
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: $@ - Message #
|
|
# #
|
|
# Return values: Not used #
|
|
################################################################################
|
|
log_failure_msg()
|
|
{
|
|
/bin/echo -n -e "${BMPREFIX}${@}"
|
|
/bin/echo -e "${CURS_ZERO}${FAILURE_PREFIX}${SET_COL}${FAILURE_SUFFIX}"
|
|
|
|
# Strip non-printable characters from log file
|
|
|
|
timespec
|
|
logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
|
|
/bin/echo -e "${STAMP} ${logmessage} FAIL" >> ${BOOTLOG}
|
|
|
|
return 0
|
|
}
|
|
|
|
log_failure_msg2()
|
|
{
|
|
/bin/echo -n -e "${BMPREFIX}${@}"
|
|
/bin/echo -e "${CURS_ZERO}${FAILURE_PREFIX}${SET_COL}${FAILURE_SUFFIX}"
|
|
|
|
echo "FAIL" >> ${BOOTLOG}
|
|
|
|
return 0
|
|
}
|
|
|
|
################################################################################
|
|
# log_warning_msg() #
|
|
# Usage: log_warning_msg ["message"] #
|
|
# #
|
|
# Purpose: Print a warning status message to the screen and #
|
|
# a boot log file. #
|
|
# #
|
|
# Return values: Not used #
|
|
################################################################################
|
|
log_warning_msg()
|
|
{
|
|
/bin/echo -n -e "${BMPREFIX}${@}"
|
|
/bin/echo -e "${CURS_ZERO}${WARNING_PREFIX}${SET_COL}${WARNING_SUFFIX}"
|
|
|
|
# Strip non-printable characters from log file
|
|
logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
|
|
timespec
|
|
/bin/echo -e "${STAMP} ${logmessage} WARN" >> ${BOOTLOG}
|
|
|
|
return 0
|
|
}
|
|
|
|
log_skip_msg()
|
|
{
|
|
/bin/echo -n -e "${BMPREFIX}${@}"
|
|
/bin/echo -e "${CURS_ZERO}${SKIP_PREFIX}${SET_COL}${SKIP_SUFFIX}"
|
|
|
|
# Strip non-printable characters from log file
|
|
logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
|
|
/bin/echo "SKIP" >> ${BOOTLOG}
|
|
|
|
return 0
|
|
}
|
|
|
|
################################################################################
|
|
# log_info_msg() #
|
|
# Usage: log_info_msg message #
|
|
# #
|
|
# Purpose: Print an information message to the screen and #
|
|
# a boot log file. Does not print a trailing newline character. #
|
|
# #
|
|
# Return values: Not used #
|
|
################################################################################
|
|
log_info_msg()
|
|
{
|
|
/bin/echo -n -e "${BMPREFIX}${@}"
|
|
|
|
# Strip non-printable characters from log file
|
|
logmessage=`echo "${@}" | sed 's/\\\033[^a-zA-Z]*.//g'`
|
|
timespec
|
|
/bin/echo -n -e "${STAMP} ${logmessage}" >> ${BOOTLOG}
|
|
|
|
return 0
|
|
}
|
|
|
|
log_info_msg2()
|
|
{
|
|
/bin/echo -n -e "${@}"
|
|
|
|
# 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
|