asterisk/contrib/scripts/safe_asterisk

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