Creating init scrips in Linux

rootking · 03-20-2003, 08:26 PM

I've been wanting to know how to make an initialization script for when I boot-up linux. Just like the scripts that are executed for each run level. If anyone knows how to make these or has a resource to point me to PLEASE reply!!

OS: SuSE 8.0

thanks
marshall

Texicle · 03-20-2003, 08:42 PM

Are you wanting to create your own or modify existing ones?

rootking · 03-20-2003, 08:44 PM

Quote:

Originally posted by Texicle
Are you wanting to create your own or modify existing ones?

Create my own and modify existing. I'd like to know about both.

Texicle · 03-20-2003, 09:02 PM

To learn about them, I'd go through all my rc.* files in /etc/rc.d directory as well as anything in lilo or grub files. For instance, /etc/rc.d/rc.local will have a bunch of entries for other files to run at boot time like rc.M or rc.modules or rc.serial, etc. If you then go through them all with a text editor you should be able to see how they're structured as well as their syntax. You will be able to modify existing ones, and will be able to compare your newly created scripts to those that already exist.

If I'm wrong, someone will surely correct me or at the very least add to the list of rc.* files that you can peruse. Hope this helps.

rootking · 03-20-2003, 09:07 PM

I don't see any rc.local.

Texicle · 03-20-2003, 10:24 PM

SuSE my have different files. Hopefully someone with SuSE will know. I think this will work though once you find out the correct file name.

aherm · 03-20-2003, 10:27 PM

It is in here:

/etc/init.d/boot.local

for you to create one.

#
# Start user defined bootup script.
#
if test -f /etc/init.d/boot.local ; then
echo "Running /etc/init.d/boot.local"
/bin/sh /etc/init.d/boot.local
rc_status -v1 -r
fi

Have a lot of fun :-)

Road · 03-21-2003, 05:38 PM

On a RH system there is instructions on how to do it here:

/usr/share/doc/initscripts-6.95

You will also find a bunch of other instrucions more detailed than the man pages for most of the applications you install.

Road

rmartine · 03-21-2003, 08:15 PM

Hey on the beyond LFS website they have a great tutorial on multiple ways of setting up boot scripts. They explain what they're for and why each line is there. They're very simple and easy to follow. Check this link out.

http://hints.linuxfromscratch.org/hints.shtml

rnturn · 03-22-2003, 01:54 AM

Quote:

Originally posted by rootking
I've been wanting to know how to make an initialization script for when I boot-up linux. Just like the scripts that are executed for each run level.

In general, one of these scripts will look something like:

Code:

#!/bin/sh

start() {
  echo "Starting NiftyApp (tm)..."
  [ do app startup stuff ]
}

stop() {
  echo "Stopping NiftyApp (tm)..."
  [ do app shutdown ]
}

case "$1" in
start) start ;;
stop) stop ;;
restart) stop ; start ;;
*) echo "Dunno how to $1"
esac

Look in your SYSV init script subdirectory (/etc/rc.d/init.d in RH; same for Suse?) for some examples. You can test it without having to boot and when it's working correctly create the appropriate symbolic links in the rc0.d/rc3.d/rc5.d subdirectories.

Hope this helps a bit...

Rick