Mark Knecht wrote:
Hi,
I'm trying to get my mythfrontend box to allow a user to shut the
machine down without the use of a keyboard. We are only using remote
controls. suso doesn't seem to be an option because it requires a
password. (AFAICT)
Is there some other way that I could make this work?
2 options:
1. Sudo can be setup to allow some commands to be run without a
password. I think this entry in /etc/sudoers should work:
mythtv ALL = NOPASSWD: /sbin/shutdown
I have not tested this, so if something goes wrong, you'll have to try
and figure out "man sudoers".
2. Create a setuid (chmod 4711 /sbin/shutdown_by_anyone.sh) shell script
that runs shutdown. Be sure to export the PATH, and unset LD_PRELOAD
and LD_LIBRARY_PATH variables at the very beginning of the script. Also
make sure the interpreter line is "/bin/bash --". This doesn't fix all
of the security holes with setuid shell scripts, just the most common
and easiest to fix...
-Richard
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