hosts/jenkins/etc/init.d/jenkins: add the main jenkins init.d script

hosts/jenkins/etc/init.d/jenkins

+#!/bin/bash
+# /etc/init.d/jenkins
+# debian-compatible jenkins startup script.
+# Amelia A Lewis <alewis@ibco.com>
+#
+### BEGIN INIT INFO
+# Provides:          jenkins
+# Required-Start:    $remote_fs $syslog $network
+# Required-Stop:     $remote_fs $syslog $network
+# Default-Start:     2 3 4 5
+# Default-Stop:      0 1 6
+# Short-Description: Start Jenkins at boot time
+# Description:       Controls Jenkins Continuous Integration Server
+### END INIT INFO
+
+PATH=/bin:/usr/bin:/sbin:/usr/sbin
+
+DESC="Jenkins Continuous Integration Server"
+NAME=jenkins
+SCRIPTNAME=/etc/init.d/$NAME
+
+[ -r /etc/default/$NAME ] && . /etc/default/$NAME
+
+#DAEMON=$JENKINS_SH
+DAEMON=/usr/bin/daemon
+DAEMON_ARGS="--name=$NAME --inherit --env=JENKINS_HOME=$JENKINS_HOME --output=$JENKINS_LOG --pidfile=$PIDFILE"
+
+if [ -n "$UMASK" ]; then
+    DAEMON_ARGS="$DAEMON_ARGS --umask=$UMASK"
+fi
+
+SU=/bin/su
+
+# Exit if the package is not installed
+if [ ! -x "$DAEMON" ]; then
+    echo "daemon package not installed" >&2
+    exit 1
+fi
+
+# Exit if not supposed to run standalone
+if [ "$RUN_STANDALONE" = "false" ]; then
+    echo "Not configured to run standalone" >&2
+    exit 1
+fi
+
+# load environments
+if [ -r /etc/default/locale ]; then
+  . /etc/default/locale
+  export LANG LANGUAGE
+elif [ -r /etc/environment ]; then
+  . /etc/environment
+  export LANG LANGUAGE
+fi
+
+# Load the VERBOSE setting and other rcS variables
+. /lib/init/vars.sh
+
+# Define LSB log_* functions.
+# Depend on lsb-base (>= 3.0-6) to ensure that this file is present.
+. /lib/lsb/init-functions
+
+# Make sure we run as root, since setting the max open files through
+# ulimit requires root access
+if [ `id -u` -ne 0 ]; then
+    echo "The $NAME init script can only be run as root"
+    exit 1
+fi
+
+
+check_tcp_port() {
+    local service=$1
+    local assigned=$2
+    local default=$3
+
+    if [ -n "$assigned" ]; then 
+        port=$assigned
+    else
+        port=$default
+    fi
+    
+    count=`netstat --listen --numeric-ports | grep \:$port[[:space:]] | grep -c . `
+    
+    if [ $count -ne 0 ]; then
+        echo "The selected $service port ($port) seems to be in use by another program "
+        echo "Please select another port to use for $NAME"
+        return 1
+    fi
+}
+
+#
+# Function that starts the daemon/service
+#
+do_start()
+{
+    # the default location is /var/run/jenkins/jenkins.pid but the parent directory needs to be created
+    mkdir `dirname $PIDFILE` > /dev/null 2>&1 || true
+    chown $JENKINS_USER `dirname $PIDFILE`
+    # Return
+    #   0 if daemon has been started
+    #   1 if daemon was already running
+    #   2 if daemon could not be started
+    $DAEMON $DAEMON_ARGS --running && return 1
+
+    # Verify that the jenkins port is not already in use, winstone does not exit
+    # even for BindException
+    check_tcp_port "http" "$HTTP_PORT" "8080" || return 2
+    
+    # If the var MAXOPENFILES is enabled in /etc/default/jenkins then set the max open files to the 
+    # proper value
+    if [ -n "$MAXOPENFILES" ]; then
+        [ "$VERBOSE" != no ] && echo Setting up max open files limit to $MAXOPENFILES
+        ulimit -n $MAXOPENFILES
+    fi
+    
+    # notify of explicit umask
+    if [ -n "$UMASK" ]; then
+        [ "$VERBOSE" != no ] && echo Setting umask to $UMASK
+    fi
+
+    # --user in daemon doesn't prepare environment variables like HOME, USER, LOGNAME or USERNAME,
+    # so we let su do so for us now
+    $SU -l $JENKINS_USER --shell=/bin/bash -c "$DAEMON $DAEMON_ARGS -- $JAVA $JAVA_ARGS -jar $JENKINS_WAR $JENKINS_ARGS" || return 2
+}
+
+
+#
+# Verify that all jenkins processes have been shutdown
+# and if not, then do killall for them
+# 
+get_running() 
+{
+    return `ps -U $JENKINS_USER --no-headers -f | egrep -e '(java|daemon)' | grep -c . `
+}
+
+force_stop() 
+{
+    get_running
+    if [ $? -ne 0 ]; then 
+	killall -u $JENKINS_USER java daemon || return 3
+    fi
+}
+
+# Get the status of the daemon process
+get_daemon_status()
+{
+    $DAEMON $DAEMON_ARGS --running || return 1
+}
+
+
+#
+# Function that stops the daemon/service
+#
+do_stop()
+{
+    # Return
+    #   0 if daemon has been stopped
+    #   1 if daemon was already stopped
+    #   2 if daemon could not be stopped
+    #   other if a failure occurred
+    get_daemon_status 
+    case "$?" in
+	0) 
+	    $DAEMON $DAEMON_ARGS --stop || return 2
+        # wait for the process to really terminate
+        for n in 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20; do
+            sleep 1
+            $DAEMON $DAEMON_ARGS --running || break
+        done
+        if get_daemon_status; then
+	        force_stop || return 3
+        fi
+	    ;;
+	*)
+	    force_stop || return 3
+	    ;;
+    esac
+
+    # Many daemons don't delete their pidfiles when they exit.
+    rm -f $PIDFILE
+    return 0
+}
+
+case "$1" in
+  start)
+    log_daemon_msg "Starting $DESC" "$NAME"
+    do_start
+    case "$?" in
+        0|1) log_end_msg 0 ;;
+        2) log_end_msg 1 ;;
+    esac
+    ;;
+  stop)
+    log_daemon_msg "Stopping $DESC" "$NAME"
+    do_stop
+    case "$?" in
+        0|1) log_end_msg 0 ;;
+        2) log_end_msg 1 ;;
+    esac
+    ;;
+  restart|force-reload)
+    #
+    # If the "reload" option is implemented then remove the
+    # 'force-reload' alias
+    #
+    log_daemon_msg "Restarting $DESC" "$NAME"
+    do_stop
+    case "$?" in
+      0|1)
+        do_start
+        case "$?" in
+          0) log_end_msg 0 ;;
+          1) log_end_msg 1 ;; # Old process is still running
+          *) log_end_msg 1 ;; # Failed to start
+        esac
+        ;;
+      *)
+  	# Failed to stop
+	log_end_msg 1
+	;;
+    esac
+    ;;
+  status)
+	get_daemon_status
+	case "$?" in 
+	 0) 
+		echo "$DESC is running with the pid `cat $PIDFILE`"
+		rc=0
+		;;
+	*) 
+		get_running
+		procs=$?
+		if [ $procs -eq 0 ]; then 
+			echo -n "$DESC is not running"
+			if [ -f $PIDFILE ]; then 
+				echo ", but the pidfile ($PIDFILE) still exists"
+				rc=1
+			else 
+				echo
+				rc=3
+			fi
+		
+		else 
+			echo "$procs instances of jenkins are running at the moment"
+			echo "but the pidfile $PIDFILE is missing"
+			rc=0
+		fi
+		
+		exit $rc
+		;;
+	esac
+	;;
+  *)
+    echo "Usage: $SCRIPTNAME {start|stop|status|restart|force-reload}" >&2
+    exit 3
+    ;;
+esac
+
+exit 0