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.
I'll look closer, but it doesn't seem this script is saving the pid file anywhere. It checks for a pid file to see if the daemon is already running, so perhaps it expects the daemon to write one itself...
-Hollis
# 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
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