#!/bin/sh
#
# nginx - this script starts and stops the nginx daemon
#
# chkconfig:   - 85 15
# description:  Nginx is an HTTP(S) server, HTTP(S) reverse \
#               proxy and IMAP/POP3 proxy server
# processname: nginx
# config:      /etc/nginx/nginx.conf
# config:      /etc/sysconfig/nginx
# pidfile:     /run/nginx.pid

# We are not using systemd for nginx, so enable the old ways via env var, which is
# already set via SuperServer when shut/unshutting via cli, but some folks use bash
# where it is actually already set by login, but "sudo ..." will erase that env...
SYSTEMCTL_SKIP_REDIRECT=1

# Source function library.
. /etc/rc.d/init.d/functions

nginx="/usr/sbin/nginx"
prog=$(basename $nginx)

vrf=""
prefix=""
if [[ -n "$2" ]]; then
    vrf="-$2"
    prefix="ip netns exec ns-$2"
fi

sysconfig="/etc/sysconfig/$prog"
lockfile="/var/lock/subsys/nginx${vrf}"
pidfile="/run/${prog}${vrf}.pid"
configfile="/etc/nginx/nginx${vrf}.conf"
allpidfiles="/var/run/${prog}*.pid"

[ -f $sysconfig ] && . $sysconfig


start() {
    [ -x $nginx ] || exit 5
    [ -f $configfile ] || exit 6
    echo -n $"Starting $prog: "
    daemon $prefix $nginx -c $configfile -g $"\"pid ${pidfile};\""
    retval=$?
    echo
    [ $retval -eq 0 ] && touch $lockfile
    return $retval
}

stop() {
    echo -n $"Stopping $prog: "
    killproc -p $pidfile $prog
    retval=$?
    echo
    [ $retval -eq 0 ] && rm -f $lockfile
    return $retval
}

stop_all() {
    for f in $allpidfiles; do
       nginxName=${f%%.pid}
       vrf=${nginxName##/var/run/${prog}}
       lockfile="/var/lock/subsys/nginx${vrf}"
       status -p $f -l $lockfile $prog >/dev/null 2>&1 || continue
       echo -n $"Stopping ${prog}: "
       killproc -p $f $prog
       retval=$?
       echo
       [ $retval -eq 0 ] && rm -f $lockfile
    done
    return $retval
}

restart() {
    configtest_q || return 6
    stop
    start
}

reload() {
    configtest_q || return 6
    echo -n $"Reloading $prog: "
    killproc -p $pidfile $prog -HUP
    echo
}

configtest() {
    $nginx -t -c $configfile
}

configtest_q() {
    $nginx -t -q -c $configfile
}

rh_status() {
    status -p $pidfile -l $lockfile $prog
}

rh_status_q() {
    rh_status >/dev/null 2>&1
}

# Upgrade the binary with no downtime.
upgrade() {
    local oldbin_pidfile="${pidfile}.oldbin"

    configtest_q || return 6
    echo -n $"Upgrading $prog: "
    killproc -p $pidfile $prog -USR2
    retval=$?
    sleep 1
    if [[ -f ${oldbin_pidfile} && -f ${pidfile} ]];  then
        killproc -p $oldbin_pidfile $prog -QUIT
        success $"$prog online upgrade"
        echo 
        return 0
    else
        failure $"$prog online upgrade"
        echo
        return 1
    fi
}

# Tell nginx to reopen logs
reopen_logs() {
    configtest_q || return 6
    echo -n $"Reopening $prog logs: "
    killproc -p $pidfile $prog -USR1
    retval=$?
    echo
    return $retval
}

case "$1" in
    start)
        rh_status_q && exit 0
        $1
        ;;
    stop)
        rh_status_q || exit 0
        $1
        ;;
    restart|configtest|reopen_logs|stop_all)
        $1
        ;;
    force-reload|upgrade) 
        rh_status_q || exit 7
        upgrade
        ;;
    reload)
        rh_status_q || exit 7
        $1
        ;;
    status|status_q)
        rh_$1
        ;;
    condrestart|try-restart)
        rh_status_q || exit 7
        restart
	    ;;
    *)
        echo $"Usage: $0 {start|stop|reload|configtest|status|force-reload|upgrade|restart|reopen_logs|stop_all}"
        exit 2
esac
