restart the shell from within a shell script

win32sux · 05-20-2006, 09:34 PM

hi, i'm building linux from scratch, and i have a small question about restarting the shell...

the thing is i'm trying to script my whole LFS build as i go, so as not to have to re-type everything when i want to build it again...

in chapter 6, when we have to restart the shell, we do a:

Code:

exec /tools/bin/bash --login +h

my question is: can this be done from within a script?? cuz if i just stick that command in my script it won't go any further... is there some kinda trick i could use?? how can i restart a shell from within a script and have the script continue where it left??

Linux.tar.gz · 05-20-2006, 09:56 PM

I'm probably saying something silly, but telinit may be helpful.

win32sux · 05-20-2006, 10:11 PM

Quote:

Originally Posted by Linux.tar.gz

I'm probably saying something silly, but telinit may be helpful.

thanks for the reply! could you provide an example of how telinit would do this within a script?? keep in mind the script is running in a chroot (i'm working through an xterm) on the host...

Linux.tar.gz · 05-20-2006, 10:43 PM

Well, imho, telinit in a chroot leads to nothing. My idea was to do some kind of relaunch of the system in order to restart the login, like kdm or gdm do when they log an user automatically.

spirit receiver · 05-21-2006, 04:07 AM

How about a here document sent to STDIN of the new shell?

Code:

exec /tools/bin/bash --login +h << EOF
   echo "Hi, I'm the new shell."
   [...]
EOF