I hope the following is helpful. It's a function "daemon" that exists on
Linux (Redhat, at least, maybe other SysV init systems, too). It's used to
make a backgrounded daemon out of a foreground process, and it looks like it
deals with getting the *right* PID. Another possibility is to switch to
daemontools, which EXPECTS its managed processes to be foreground processes.
Caveat: I'm not using either of these techniques for handling WebKit
processes.
# A function to start a program.
daemon() {
# Test syntax.
local gotbase= force=
local base= user= nice= bg= pid
nicelevel=0
while [ "$1" != "${1##[-+]}" ]; do
case $1 in
'') echo $"$0: Usage: daemon [+/-nicelevel] {program}"
return 1;;
--check)
base=$2
gotbase="yes"
shift 2
;;
--check=?*)
base=${1#--check=}
gotbase="yes"
shift
;;
--user)
user=$2
shift 2
;;
--user=?*)
user=${1#--user=}
shift
;;
--force)
force="force"
shift
;;
[-+][0-9]*)
nice="nice -n $1"
shift
;;
*) echo $"$0: Usage: daemon [+/-nicelevel] {program}"
return 1;;
esac
done
# Save basename.
[ -z "$gotbase" ] && base=${1##*/}
# See if it's already running. Look *only* at the pid file.
pid=`pidfileofproc $base`
[ -n "${pid:-}" -a -z "${force:-}" ] && return
# make sure it doesn't core dump anywhere; while this could mask
# problems with the daemon, it also closes some security problems
ulimit -S -c 0 >/dev/null 2>&1
# Echo daemon
[ "${BOOTUP:-}" = "verbose" -a -z "$LSB" ] && echo -n " $base"
# And start it up.
if [ -z "$user" ]; then
$nice initlog $INITLOG_ARGS -c "$*"
else
$nice initlog $INITLOG_ARGS -c "su -s /bin/bash - $user -c
\"$*\""
fi
[ "$?" -eq 0 ] && success $"$base startup" || failure $"$base
startup"
}
Cheers!
--
David Hancock | [EMAIL PROTECTED] | 410-266-4384
-----Original Message-----
From: Hollis Blanchard [mailto:[EMAIL PROTECTED]
Sent: Monday, December 15, 2003 12:47 AM
To: [EMAIL PROTECTED]
Subject: [Webware-discuss] Re: init script bugs (AppServer autoreloads)
On Sunday, Dec 14, 2003, at 23:18 US/Central, Hollis Blanchard wrote:
>
> + su -s /bin/sh -c "$LAUNCH" $WEBKIT_USER >> $LOG 2>&1 &
Unfortunately the su causes $! to return a PID for the su process,
which disappears instantly. So writing it to /var/run/webkit.pid later
in the init script is worthless; what we really want is the PID of
$LAUNCH. I guess the trailing & needs to be moved, but I can't figure
it out right now. Anyone else?
Note that an su command was already present in the script, though
commented out. I seem to recall that not working either when I tried it.
-Hollis
-------------------------------------------------------
This SF.net email is sponsored by: IBM Linux Tutorials.
Become an expert in LINUX or just sharpen your skills. Sign up for IBM's
Free Linux Tutorials. Learn everything from the bash shell to sys admin.
Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
_______________________________________________
Webware-discuss mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/webware-discuss
-------------------------------------------------------
This SF.net email is sponsored by: IBM Linux Tutorials.
Become an expert in LINUX or just sharpen your skills. Sign up for IBM's
Free Linux Tutorials. Learn everything from the bash shell to sys admin.
Click now! http://ads.osdn.com/?ad_id=1278&alloc_id=3371&op=click
_______________________________________________
Webware-discuss mailing list
[EMAIL PROTECTED]
https://lists.sourceforge.net/lists/listinfo/webware-discuss
