Updates from royk to safe_asterisk (#5207) Thanks!

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@8582 65c4cc65-6c06-0410-ace0-fbb531ad65f3

contrib/scripts/safe_asterisk

 #!/bin/sh
-CLIARGS="$*"		# Grab any args passed to safe_asterisk
-TTY=9			# TTY (if you want one) for Asterisk to run on
-CONSOLE=yes		# Whether or not you want a console
+# vim:textwidth=80:tabstop=4:shiftwidth=4:smartindent:autoindent
+
+CLIARGS="$*"				# 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
-MACHINE=`hostname`      # To specify which machine has crashed when getting the mail
+MACHINE=`hostname`			# To specify which machine has crashed when getting the mail
 DUMPDROP=/tmp
+SLEEPSECS=5
 ASTSBINDIR=__ASTERISK_SBIN_DIR__
+
+# comment this line out to have this script _not_ kill all mpg123 processes when
+# asterisk exits
+KILLALLMPG123=1
+
+# run asterisk with this priority
+PRIORITY=-19
+
+# set system filemax on supported OSes if this variable is set
+# SYSMAXFILES=262144
+
+# 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
+
+# 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 "This is NOT suitable for large systems." >&2
+	PRIORITY=0
+else
+	if `echo $OSTYPE | grep linux 2>&1 > /dev/null `
+	then
+		# maximum number of open files is set to the system maximum divided by two if
+		# MAXFILES is not set.
+		if [ "$MAXFILES" = "" ]
+		then
+			# just check if file-max is readable
+			if [ -r /proc/sys/fs/file-max ]
+			then
+				MAXFILES=$(( `cat /proc/sys/fs/file-max` / 2 ))
+			fi
+		fi
+		SYSCTL_MAXFILES="fs.file-max"
+	elif `echo $OSTYPE | grep darwin 2>&1 > /dev/null `
+	then
+		SYSCTL_MAXFILES="kern.maxfiles"
+	fi
+
+
+	if [ "$SYSMAXFILES" != "" ]
+	then
+		if [ "$SYSCTL_MAXFILES" != "" ]
+		then
+			sysctl -w $SYSCTL_MAXFILES=$SYSMAXFILES
+		fi
+	fi
+
+	# set the process's filemax to whatever set above
+	ulimit -n $MAXFILES
+
+fi
+
+#
+# Let Asterisk dump core
+#
+ulimit -c unlimited
+
 #
 # Don't fork when running "safely"
 #
@@ -29,11 +94,6 @@ if [ ! -w ${DUMPDROP} ]; then
 	exit 1
 fi
 
-#
-# Let Asterisk dump core
-#
-ulimit -c unlimited
-
 #launch_asterisk()
 #{
 #}
@@ -45,10 +105,10 @@ run_asterisk()
 		if [ "$TTY" != "" ]; then
 			cd /tmp
 			stty sane < /dev/${TTY}
-			${ASTSBINDIR}/asterisk ${CLIARGS} ${ASTARGS} >& /dev/${TTY} < /dev/${TTY}
+			nice -n $PRIORITY ${ASTSBINDIR}/asterisk ${CLIARGS} ${ASTARGS} >& /dev/${TTY} < /dev/${TTY}
 		else
 			cd /tmp
-			${ASTSBINDIR}/asterisk ${CLIARGS} ${ASTARGS}
+			nice -n $PRIORITY ${ASTSBINDIR}/asterisk ${CLIARGS} ${ASTARGS}
 		fi
 		EXITSTATUS=$?
 		echo "Asterisk ended with exit status $EXITSTATUS"
@@ -63,7 +123,7 @@ run_asterisk()
 				echo "Asterisk on $MACHINE exited on signal $EXITSIGNAL.  Might want to take a peek." | \
 				mail -s "Asterisk Died" $NOTIFY
 			fi
-                        if [ -f /tmp/core ]; then
+			if [ -f /tmp/core ]; then
 				mv /tmp/core ${DUMPDROP}/core.`hostname`-`date -Iseconds` &
 			fi
 		else
@@ -72,13 +132,17 @@ run_asterisk()
 				exit 0
 			else
 				echo "Asterisk died with code $EXITSTATUS."
-	                        if [ -f /tmp/core ]; then
+				if [ -f /tmp/core ]; then
 					mv /tmp/core ${DUMPDROP}/core.`hostname`-`date -Iseconds` &
 				fi
 			fi
 		fi
 		echo "Automatically restarting Asterisk."
-		sleep 4
+		sleep $SLEEPSECS
+		if [ $KILLALLMPG123 ]
+		then
+			killall -9 mpg123
+		fi
 	done
 }