initscript CentOS launching chroot nginx problems - linux

Question

I found this initscript for launching nginx here: http://www.rackspace.com/knowledge_center/article/centos-adding-an-nginx-init-script. Im trying to modify it to work with a chroot environment and its proving more troublesome than I expected.
Here's what I have:
#!/bin/sh
#
# nginx - this script starts and stops the nginx daemin
#
# chkconfig: - 85 15
. /etc/rc.d/init.d/functions
. /etc/sysconfig/network
[ "$NETWORKING" = "no" ] && exit 0
nginx="/usr/local/nginx/sbin/nginx"
prog="nginx"
chroot="/usr/sbin/chroot /nginx
NGINX_CONF_FILE="/usr/local/nginx/conf/nginx.conf"
lockfile=/var/lock/subsys/nginx
start() {
[ -x $nginx ] || exit 5
[ -f $NGINX_CONF_FILE ] || exit 6
echo -n $"Starting $prog: "
daemon $chroot $nginx -c $NGINX_CONF_FILE
retval=$?
echo
[ $retval -eq 0 ] && touch $lockfile
return $retval
}
stop() {
echo -n $"Stopping $prog: "
killall $prog
retval=$?
echo
[ $retval -eq 0 ] && rm -f $lockfile
return $retval
}
restart() {
configtest || return $?
stop
start
}
reload() {
configtest || return $?
echo -n $"Reloading $prog: "
killall $prog -HUP
retval=$?
echo
}
force_reload() {
restart
}
configtest() {
$nginx -t -c $NGINX_CONF_FILE
}
rh_status() {
status $prog
}
rh_status_q() {
rh_status >/dev/null 2>&1
}
case "$1" in
start)
if rh_status_q; then
printf "$prog already running\n"
exit 0
fi
$1
;;
stop)
if ! rh_status_q; then
printf "$prog not running\n"
exit 0
fi
$1
;;
restart|configtest)
$1
;;
reload)
if ! rh_status_q; then
printf "$prog not running\n"
exit 7
fi
$1
;;
force-reload)
force_reload
;;
status)
rh_status
;;
condrestart|try-restart)
if ! rh_status_q; then
printf "$prog not running\n"
exit 0
fi
;;
*)
echo $"Usage: $0 {start|stop|status|restart|condrestart|try-restart|reload|force-reload|configtest}"
exit 2
esac
The main thing not working right now is the status call.
[root#localhost ~]# /etc/init.d/nginx status
nginx dead but subsys locked
This error points to a lockfile being present but no pid file. This is true, however when I use the original nginx init script and launch it in a non-chroot environment, there is no pidfile, and the status call works just fine.
I put in some lines to retrieve the pid by launching the process in the background instead of using daemon:
PID=$chroot $nginx -c $NGINX_CONF_FILE > /dev/null 2>&1 $ echo $!
echo $PID > $pidfile
But this grabs the pid of chroot, which ends after nginx is launched. Nginx has both a master and a child pid. Might grabbing those and putting them to a pidfile be the way forward? Or is there something else I should try?
I think its because daemon launches a chroot process it gets the wrong pid.

Answer 1

Alright it was as easy as grepping for the pid
pidfile='/var/run/nginx.pid'
start(){
...
daemon $chroot $nginx -c $NGINX_CONF_FILE
PID=`ps -ef | grep $nginx | grep -v grep | awk '{print $2}'`
echo $PID > $pidfile
...
}
stop() {
...
[ $retval -eq 0 ] && rm -f $lockfile && rm -f $pidfile
return $retval
}