Incorporate the ability to log output of safe_asterisk to syslog (closes issue #9882)

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@81744 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/scripts/safe_asterisk

@@ -6,6 +6,8 @@ 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
@@ -26,15 +28,26 @@ PRIORITY=0
 # set to the system's maximum files open devided by two, if not set here.
 # MAXFILES=32768
 
+function message() {
+	echo "$1" >&2
+	if [ "$SYSLOG" != "" ]; then
+	    logger -p "${SYSLOG}.warn" -t safe_asterisk[$$] "$1"
+	fi
+	if [ "$LOGFILE" != "" ]; then
+	    echo "safe_asterisk[$$]: $1" >> "$LOGFILE"
+	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 [ `id -u` != 0 ]
 then
-	echo "Ops. I'm not root. Falling back to standard prio and file max." >&2
+	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 `echo $OSTYPE | grep linux 2>&1 > /dev/null `
 	then
@@ -83,7 +96,7 @@ if [ "$TTY" != "" ]; then
 	elif [ -c /dev/vc/${TTY} ]; then
 		TTY=vc/${TTY}
 	else
-		echo "Cannot find your TTY (${TTY})" >&2
+		message "Cannot find specified TTY (${TTY})"
 		exit 1
 	fi
 	ASTARGS="${ASTARGS} -vvvg"
@@ -92,7 +105,7 @@ if [ "$TTY" != "" ]; then
 	fi
 fi
 if [ ! -w ${DUMPDROP} ]; then	
-	echo "Cannot write to ${DUMPDROP}" >&2
+	message "Cannot write to ${DUMPDROP}"
 	exit 1
 fi
 
@@ -126,10 +139,10 @@ run_asterisk()
 			nice -n $PRIORITY ${ASTSBINDIR}/asterisk -f ${CLIARGS} ${ASTARGS}
 		fi
 		EXITSTATUS=$?
-		echo "Asterisk ended with exit status $EXITSTATUS"
+		message "Asterisk ended with exit status $EXITSTATUS"
 		if [ "$EXITSTATUS" = "0" ]; then
 			# Properly shutdown....
-			echo "Asterisk shutdown normally."
+			message "Asterisk shutdown normally."
 			exit 0
 		elif [ $EXITSTATUS -gt 128 ]; then
 			let EXITSIGNAL=EXITSTATUS-128
@@ -137,6 +150,7 @@ run_asterisk()
 			if [ "$NOTIFY" != "" ]; then
 				echo "Asterisk on $MACHINE exited on signal $EXITSIGNAL.  Might want to take a peek." | \
 				mail -s "Asterisk Died" $NOTIFY
+				message "Exited on signal $EXITSIGNAL"
 			fi
 			if [ "$EXEC" != "" ]; then
 				$EXEC
@@ -149,11 +163,7 @@ run_asterisk()
 				mv /tmp/core ${DUMPDROP}/core.`hostname`-`date -Iseconds` &
 			fi
 		else
-			if [ "${EXITSTATUS}" = "0" ]; then
+			message "Asterisk died with code $EXITSTATUS."
-				echo "Asterisk ended normally.  Aborting."
-				exit 0
-			else
-				echo "Asterisk died with code $EXITSTATUS."
 
 			PID=`cat ${ASTPIDFILE}`
 			if [ -f /tmp/core.${PID} ]; then
@@ -162,8 +172,7 @@ run_asterisk()
 				mv /tmp/core ${DUMPDROP}/core.`hostname`-`date -Iseconds` &
 			fi
 		fi
-		fi
+		message "Automatically restarting Asterisk."
-		echo "Automatically restarting Asterisk."
 		sleep $SLEEPSECS
 		if [ $KILLALLMPG123 ]
 		then