meta-openembedded/meta-webserver/recipes-httpd/apache2/files/init

#!/bin/sh
### BEGIN INIT INFO
# Provides: httpd
# Required-Start: $local_fs $remote_fs $network $named
# Required-Stop: $local_fs $remote_fs $network
# Should-Start: distcache
# Short-Description: start and stop Apache HTTP Server
# Description: The Apache HTTP Server is an extensible server
#  implementing the current HTTP standards.
### END INIT INFO

ARGS="-D SSL -D PHP5 -k start"
NAME=apache2
PATH=/bin:/usr/bin:/sbin:/usr/sbin
DAEMON=/usr/sbin/httpd
SUEXEC=/usr/lib/apache/suexec
PIDFILE=/run/httpd.pid
CONF=/etc/apache2/httpd.conf
APACHECTL=/usr/sbin/apachectl 

trap "" 1
export LANG=C
export PATH

test -f $DAEMON || exit 0
test -f $APACHECTL || exit 0

# ensure we don't leak environment vars into apachectl
APACHECTL="env -i LANG=${LANG} PATH=${PATH} $APACHECTL"

apache_conftest() {
    if $($APACHECTL configtest > /dev/null 2>&1 ); then
        return 0
    else
        return 1
    fi
}

apache_wait_start() {
    local STATUS=$1

    if [ $STATUS != 0 ] ; then
        return $STATUS
    fi

    local i=0
    while : ; do
            PIDTMP=$(pidof $DAEMON | tr ' ' '\n' | grep -w $(cat $PIDFILE))
            if [ -n "${PIDTMP:-}" ] && kill -0 "${PIDTMP:-}" 2> /dev/null; then
                    return $STATUS
            fi

            if [ $i = "20" ] ; then
                    return 2
            fi

            sleep 1
            i=$(($i+1))
    done
}

apache_wait_stop() {
    local STATUS=$1

    if [ $STATUS != 0 ] ; then
        return $STATUS
    fi

    PIDTMP=$(pidof $DAEMON | tr ' ' '\n' | grep -w $(cat $PIDFILE))
    if [ -n "${PIDTMP:-}" ] && kill -0 "${PIDTMP:-}" 2> /dev/null; then
            local i=0
            while kill -0 "${PIDTMP:-}" 2> /dev/null;  do
                    if [ $i = '60' ]; then
                            STATUS=2
                            break
                    fi
                    sleep 1
                    i=$(($i+1))
            done
            return $STATUS
    else
        return $STATUS
    fi
}

#
# Function that starts the daemon/service
#
do_start()
{
    # Return
    #   0 if daemon has been started
    #   1 if daemon was already running
    #   2 if daemon could not be started

    if [ -e $PIDFILE ] && pidof $DAEMON | tr ' ' '\n' | grep -w $(cat $PIDFILE) > /dev/null 2>&1 ; then
            return 1
    fi

    if apache_conftest ; then
            $APACHECTL start
            apache_wait_start $?
            return $?
    else
            return 2
    fi
}

#
# 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

        local AP_RET=0

        if pidof $DAEMON > /dev/null 2>&1 ; then
                if [ -e $PIDFILE ] && pidof $DAEMON | tr ' ' '\n' | grep -w $(cat $PIDFILE) > /dev/null 2>&1 ; then
                        AP_RET=2
                else
                        AP_RET=1
                fi
        else
            AP_RET=0
        fi

        # AP_RET is:
        # 0 if Apache (whichever) is not running
        # 1 if Apache (whichever) is running
        # 2 if Apache from the PIDFILE is running

        if [ $AP_RET = 0 ] ; then
                return 1
        fi

        if [ $AP_RET = 2 ] && apache_conftest ; then
                $APACHECTL stop
                apache_wait_stop $?
                return $?
        else
                if [ $AP_RET = 2 ]; then
                        kill $(pidof $DAEMON | tr ' ' '\n' | grep -w $(cat $PIDFILE))
                        apache_wait_stop $?
                        return $?
                elif [ $AP_RET = 1 ] ; then
                        return 2
                fi
        fi

}

case "$1" in
  start)
    echo -n "Starting web server: $NAME"
    do_start
    case $? in
        0|1)
            echo .
            exit 0
            ;;
        2)
            echo failed
            exit 1
            ;;
    esac
    ;;

  stop)
    echo -n "Stopping web server: $NAME"
    do_stop
    case $? in
        0|1)
            echo .
            exit 0
            ;;
        2)
            echo failed
            exit 1
            ;;
    esac
    ;;

  reload)
    echo -n "Reloading $NAME configuration"
    kill -HUP `cat $PIDFILE`
    ;;

  reload-modules)
    echo -n "Reloading $NAME modules"
    $APACHECTL restart
    ;;

  restart)
    echo "Restarting web server: $NAME"
    do_stop
    case "$?" in
        0|1)
            do_start
            exit $?
            ;;
        *)
            # Failed to stop
            exit 1
            ;;
    esac
    ;;

  force-reload)
    $0 reload-modules
    exit $?
    ;;

  *)
    echo "Usage: /etc/init.d/$NAME {start|stop|reload|reload-modules|force-reload|restart}"
    exit 1
    ;;
esac

if [ $? = 0 ]; then
	echo .
	exit 0
else
	echo failed
	exit 1
fi