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#!/bin/sh
# vim:textwidth=80:tabstop=4:shiftwidth=4:smartindent:autoindent
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=ben@alkaloid.net # Who to notify about crashes
#EXEC=/path/to/somescript # Run this command if Asterisk crashes
#LOGFILE=/path/to/logfile # 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=/tmp
SLEEPSECS=4
ASTSBINDIR=__ASTERISK_SBIN_DIR__
ASTPIDFILE=__ASTERISK_VARRUN_DIR__/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
function message() {
echo "$1" >&2
if test "x$SYSLOG" != "x" ; then
logger -p "${SYSLOG}.warn" -t safe_asterisk[$$] "$1"
fi
if test "x$LOGFILE" != "x" ; then
echo "safe_asterisk[$$]: $1" >> "$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 -rx 'core show version'`
if test "`echo $VERSION | cut -c 1-8`" = "Asterisk" ; then
message "Asterisk is already running. $0 will exit now."
exit 1
fi
# since we're going to change priority and open files limits, we need to be
# root. if running asterisk as other users, pass that to asterisk on the command
# line.
# if we're not root, fall back to standard everything.
if test `id -u` != 0 ; then
echo "Oops. I'm not root. Falling back to standard prio and file max." >&2
echo "This is NOT suitable for large systems." >&2
PRIORITY=0
message "safe_asterisk was started by `id -n` (uid `id -u`)."
else
if `uname -s | grep Linux >/dev/null 2>&1`; then
# maximum number of open files is set to the system maximum divided by two if
# MAXFILES is not set.
if test "x$MAXFILES" = "x" ; then
# just check if file-max is readable
if test -r /proc/sys/fs/file-max ; then
MAXFILES=$(( `cat /proc/sys/fs/file-max` / 2 ))
fi
fi
SYSCTL_MAXFILES="fs.file-max"
elif `uname -s | grep Darwin /dev/null 2>&1`; then
SYSCTL_MAXFILES="kern.maxfiles"
fi
if test "x$SYSMAXFILES" != "x"; then
if test "x$SYSCTL_MAXFILES" != "x"; then
sysctl -w $SYSCTL_MAXFILES=$SYSMAXFILES
fi
fi
# set the process's filemax to whatever set above
ulimit -n $MAXFILES
fi
if test "x$UMASK" != "x"; then
umask $UMASK
fi
#
# Let Asterisk dump core
#
ulimit -c unlimited
#
# Don't fork when running "safely"
#
ASTARGS=""
if test "x$TTY" != "x" ; then
if test -c /dev/tty${TTY} ; then
TTY=tty${TTY}
elif test -c /dev/vc/${TTY} ; then
TTY=vc/${TTY}
else
message "Cannot find specified TTY (${TTY})"
exit 1
fi
ASTARGS="${ASTARGS} -vvvg"
if test "x$CONSOLE" != "xno" ; then
ASTARGS="${ASTARGS} -c"
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 /etc/asterisk/startup.d ; then
for script in /etc/asterisk/startup.d/*.sh; do
if test -r ${script} ; then
. ${script}
fi
done
fi
run_asterisk()
{
while :; do
if test "x$TTY" != "x" ; then
cd /tmp
stty sane < /dev/${TTY}
nice -n $PRIORITY ${ASTSBINDIR}/asterisk -f ${CLIARGS} ${ASTARGS} >& /dev/${TTY} < /dev/${TTY}
else
cd /tmp
nice -n $PRIORITY ${ASTSBINDIR}/asterisk -f ${CLIARGS} ${ASTARGS}
fi
EXITSTATUS=$?
message "Asterisk ended with exit status $EXITSTATUS"
if test "x$EXITSTATUS" = "x0" ; then
# Properly shutdown....
message "Asterisk shutdown normally."
exit 0
elif test "0$EXITSTATUS" -gt "128" ; then
EXITSIGNAL=$(($EXITSTATUS - 128))
echo "Asterisk exited on signal $EXITSIGNAL."
if test "x$NOTIFY" != "x" ; then
echo "Asterisk on $MACHINE exited on signal $EXITSIGNAL. Might want to take a peek." | \
mail -s "Asterisk Died" $NOTIFY
message "Exited on signal $EXITSIGNAL"
fi
if test "x$EXEC" != "x" ; then
$EXEC
fi
PID=`cat ${ASTPIDFILE}`
DATE=`date "+%Y-%m-%dT%H:%M:%S%z"`
if test -f /tmp/core.${PID} ; then
mv /tmp/core.${PID} ${DUMPDROP}/core.`hostname`-$DATE &
elif test -f /tmp/core ; then
mv /tmp/core ${DUMPDROP}/core.`hostname`-$DATE &
fi
else
message "Asterisk died with code $EXITSTATUS."
PID=`cat ${ASTPIDFILE}`
DATE=`date "+%Y-%m-%dT%H:%M:%S%z"`
if test -f /tmp/core.${PID} ; then
mv /tmp/core.${PID} ${DUMPDROP}/core.`hostname`-$DATE &
elif test -f /tmp/core ; then
mv /tmp/core ${DUMPDROP}/core.`hostname`-$DATE &
fi
fi
message "Automatically restarting Asterisk."
sleep $SLEEPSECS
if test "0$KILLALLMPG123" -gt "0" ; then
killall -9 mpg123
fi
done
}
run_asterisk &
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