[BusyBox] Help - how to start a script after busybox is loaded?

[Geoffrey Espin]

On Fri, May 03, 2002 at 02:41:22PM -0500, Lee Xing wrote:
> Yes, I do use /etc/init.d/rcS to load a couple of modules and start a daemon.  But all activities (loading modules and starting the daemon) defined in rcS are started before the following step (where busybox is fully loaded):
> 
> ...
> BusyBox v0.60.0 (2001.08.24-22:09+0000) Built-in shell (ash)
> Enter 'help' for a list of built-in commands.
> 
> and it causes a problem.  The problem is the daemon started by rcS always gets closed when seeing the above trace.  That's why I'm looking for a way to start a script (which loads modules and starts a daemon) after the above step (i.e. after busybox is fully loaded).

Oh.

Not sure what you mean "trace".  But with 0.60.0 maybe this is
the problem/solution:

    http://busybox.net/lists/busybox/2002-March/011023.html

Also check the thread on this subject.

Geoff
-- 
Geoffrey Espin
espin at idiom.com
--

>From busybox-admin at busybox.net  Mon Mar  4 09:20:27 2002
From: Geoffrey Espin <espin at idiom.com>
To: BusyBox <busybox at busybox.net>
Subject: Re: [BusyBox] Starting services with busybox init
Date: Mon, 4 Mar 2002 09:19:24 -0800

> > BusyBox init doesn't detach rcS from the terminal, so that
> > processes spawned therein receive a SIGHUP and die if they don't
> > detach in time.
> So what more do we need to do to detach client programs from the
> terminal?  After the fork I close all file descriptors and call
> setsid() -- isn't that enough?  I guess I am missing something...
> <goes and looks at sysvinit sources>
> Ok, I think I see what needs to be done...

This came up some months ago... just add this to the beginnig of rcS:

    # allow scripts to continue running after rcS completes
    trap "" SIGHUP

Attached is my rcS, which is mainly what Erik wrote some time ago.

Geoff
--
Geoffrey Espin
espin at idiom.com
--

#!/bin/sh
#
# rcS

# Start all init scripts in /etc/init.d
# executing them in numerical order.

# allow scripts to continue running after rcS completes
trap "" SIGHUP

echo "Running $0 ."

for i in /etc/init.d/S??* ;do
    # Ignore dangling symlinks (if any).
    [ ! -f "$i" ] && continue

    echo "Running $i ."
    case "$i" in
        *.sh)
    	    # Source shell script for speed.
	    (
	    trap - INT QUIT TSTP
	    set start
	    . $i
	    )
	    ;;
        *)
	    # No sh extension, so fork subprocess.
	    $i start
	    ;;
    esac
    echo "Done $i ."
done

echo "Done $0 ."
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