229 lines
6.1 KiB
Bash
229 lines
6.1 KiB
Bash
#!/bin/sh
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ASTETCDIR="/etc/asterisk"
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ASTSBINDIR="/usr/sbin"
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ASTVARRUNDIR="/var/run/asterisk"
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ASTVARLOGDIR="/var/log/asterisk"
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CLIARGS="$*" # Grab any args passed to safe_asterisk
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TTY=9 # TTY (if you want one) for Asterisk to run on
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CONSOLE=yes # Whether or not you want a console
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#NOTIFY=root@localhost # Who to notify about crashes
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#EXEC=/path/to/somescript # Run this command if Asterisk crashes
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#LOGFILE="${ASTVARLOGDIR}/safe_asterisk.log" # Where to place the normal logfile (disabled if blank)
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#SYSLOG=local0 # Which syslog facility to use (disabled if blank)
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MACHINE=`hostname` # To specify which machine has crashed when getting the mail
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DUMPDROP="${DUMPDROP:-/tmp}"
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RUNDIR="${RUNDIR:-/tmp}"
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SLEEPSECS=4
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ASTPIDFILE="${ASTVARRUNDIR}/asterisk.pid"
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# comment this line out to have this script _not_ kill all mpg123 processes when
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# asterisk exits
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KILLALLMPG123=1
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# run asterisk with this priority
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PRIORITY=0
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# set system filemax on supported OSes if this variable is set
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# SYSMAXFILES=262144
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# Asterisk allows full permissions by default, so set a umask, if you want
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# restricted permissions.
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#UMASK=022
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# set max files open with ulimit. On linux systems, this will be automatically
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# set to the system's maximum files open devided by two, if not set here.
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# MAXFILES=32768
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message() {
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if test -n "$TTY" && test "$TTY" != "no"; then
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echo "$1" >/dev/${TTY}
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fi
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if test -n "$SYSLOG"; then
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logger -p "${SYSLOG}.warn" -t safe_asterisk[$$] "$1"
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fi
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if test -n "$LOGFILE"; then
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echo "safe_asterisk[$$]: $1" >>"$LOGFILE"
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fi
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}
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# Check if Asterisk is already running. If it is, then bug out, because
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# starting safe_asterisk when Asterisk is running is very bad.
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VERSION=`"${ASTSBINDIR}/asterisk" -nrx 'core show version' 2>/dev/null`
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if test "`echo $VERSION | cut -c 1-8`" = "Asterisk"; then
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message "Asterisk is already running. $0 will exit now."
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exit 1
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fi
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# since we're going to change priority and open files limits, we need to be
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# root. if running asterisk as other users, pass that to asterisk on the command
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# line.
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# if we're not root, fall back to standard everything.
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if test `id -u` != 0; then
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echo "Oops. I'm not root. Falling back to standard prio and file max." >&2
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echo "This is NOT suitable for large systems." >&2
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PRIORITY=0
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message "safe_asterisk was started by `id -n` (uid `id -u`)."
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else
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if `uname -s | grep Linux >/dev/null 2>&1`; then
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# maximum number of open files is set to the system maximum
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# divided by two if MAXFILES is not set.
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if test -z "$MAXFILES"; then
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# just check if file-max is readable
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if test -r /proc/sys/fs/file-max; then
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MAXFILES=$((`cat /proc/sys/fs/file-max` / 2))
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# don't exceed upper limit of 2^20 for open
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# files on systems where file-max is > 2^21
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if test $MAXFILES -gt 1048576; then
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MAXFILES=1048576
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fi
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fi
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fi
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SYSCTL_MAXFILES="fs.file-max"
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elif `uname -s | grep Darwin /dev/null 2>&1`; then
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SYSCTL_MAXFILES="kern.maxfiles"
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fi
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if test -n "$SYSMAXFILES"; then
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if test -n "$SYSCTL_MAXFILES"; then
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sysctl -w $SYSCTL_MAXFILES=$SYSMAXFILES
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fi
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fi
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# set the process's filemax to whatever set above
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ulimit -n $MAXFILES
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if test ! -d "${ASTVARRUNDIR}"; then
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mkdir -p "${ASTVARRUNDIR}"
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chmod 770 "${ASTVARRUNDIR}"
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fi
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fi
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if test -n "$UMASK"; then
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umask $UMASK
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fi
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#
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# Let Asterisk dump core
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#
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ulimit -c unlimited
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#
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# Don't fork when running "safely"
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#
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ASTARGS=""
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if test -n "$TTY" && test "$TTY" != "no"; then
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if test -c /dev/tty${TTY}; then
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TTY=tty${TTY}
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elif test -c /dev/vc/${TTY}; then
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TTY=vc/${TTY}
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elif test "$TTY" = "9"; then # ignore default if it was untouched
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# If there is no /dev/tty9 and not /dev/vc/9 we don't
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# necessarily want to die at this point. Pretend that
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# TTY wasn't set.
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TTY=
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else
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message "Cannot find specified TTY (${TTY})"
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exit 1
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fi
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if test -n "$TTY"; then
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ASTARGS="${ASTARGS} -vvvg"
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if test "$CONSOLE" != "no"; then
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ASTARGS="${ASTARGS} -c"
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fi
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fi
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fi
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if test ! -d "${RUNDIR}"; then
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message "${RUNDIR} does not exist, creating"
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if ! mkdir -p "${RUNDIR}"; then
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message "Unable to create ${RUNDIR}"
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exit 1
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fi
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fi
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if test ! -w "${DUMPDROP}"; then
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message "Cannot write to ${DUMPDROP}"
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exit 1
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fi
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#
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# Don't die if stdout/stderr can't be written to
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#
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trap '' PIPE
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#
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# Run scripts to set any environment variables or do any other system-specific setup needed
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#
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if test -d "${ASTETCDIR}/startup.d"; then
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for script in "${ASTETCDIR}/startup.d/"*.sh; do
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if test -r "${script}"; then
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. "${script}"
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fi
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done
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fi
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run_asterisk()
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{
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while :; do
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if test -n "$TTY" && test "$TTY" != "no"; then
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cd "${RUNDIR}"
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stty sane </dev/${TTY}
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nice -n $PRIORITY "${ASTSBINDIR}/asterisk" -f ${CLIARGS} ${ASTARGS} >/dev/${TTY} 2>&1 </dev/${TTY}
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else
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cd "${RUNDIR}"
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nice -n $PRIORITY "${ASTSBINDIR}/asterisk" -f ${CLIARGS} ${ASTARGS} >/dev/null 2>&1 </dev/null
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fi
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EXITSTATUS=$?
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message "Asterisk ended with exit status $EXITSTATUS"
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if test $EXITSTATUS -eq 0; then
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# Properly shutdown....
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message "Asterisk shutdown normally."
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exit 0
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elif test $EXITSTATUS -gt 128; then
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EXITSIGNAL=$((EXITSTATUS - 128))
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message "Asterisk exited on signal $EXITSIGNAL."
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if test -n "$NOTIFY"; then
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echo "Asterisk on $MACHINE exited on signal $EXITSIGNAL. Might want to take a peek." | \
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mail -s "Asterisk on $MACHINE died (sig $EXITSIGNAL)" $NOTIFY
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fi
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if test -n "$EXEC"; then
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$EXEC
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fi
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PID=`cat ${ASTPIDFILE}`
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DATE=`date "+%Y-%m-%dT%H:%M:%S%z"`
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if test -f "${RUNDIR}/core.${PID}"; then
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mv "${RUNDIR}/core.${PID}" "${DUMPDROP}/core.`hostname`-$DATE" &
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elif test -f "${RUNDIR}/core"; then
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mv "${RUNDIR}/core" "${DUMPDROP}/core.`hostname`-$DATE" &
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fi
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else
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message "Asterisk died with code $EXITSTATUS."
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PID=`cat ${ASTPIDFILE}`
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DATE=`date "+%Y-%m-%dT%H:%M:%S%z"`
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if test -f "${RUNDIR}/core.${PID}"; then
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mv "${RUNDIR}/core.${PID}" "${DUMPDROP}/core.`hostname`-$DATE" &
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elif test -f "${RUNDIR}/core"; then
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mv "${RUNDIR}/core" "${DUMPDROP}/core.`hostname`-$DATE" &
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fi
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fi
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message "Automatically restarting Asterisk."
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sleep $SLEEPSECS
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if test "0$KILLALLMPG123" -gt 0; then
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pkill -9 mpg123
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fi
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done
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}
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if test -n "$ASTSAFE_FOREGROUND"; then
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run_asterisk
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else
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run_asterisk &
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fi
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