setuid

int0x80 · 12-02-2005, 01:02 PM

I've coded a script that I want only an unprivileged user (david) to be able to read, write, and execute. However I need the script to run as another unprivileged user (vmail). I've read the suid howto here on LQ, but was unable to work it out on my system. I'm sure this is simple, but have been unsuccessful in all combinations of chown and chmod that I've tried so far.

acid_kewpie · 12-02-2005, 01:07 PM

chmod u+s filename

can't get much simpler than that

int0x80 · 12-02-2005, 01:12 PM

How can I tell who the script is set to run as?

Code:

david@int0x80:~/addmailuser$ ls -lh | grep -v total
-rwx------ 1 david david 1.2K 2005-12-02 13:51 addmailuser
david@int0x80:~/addmailuser$ chmod u+s addmailuser
david@int0x80:~/addmailuser$ ls -lh | grep -v total
-rws------ 1 david david 1.2K 2005-12-02 13:51 addmailuser

acid_kewpie · 12-02-2005, 02:33 PM

well that's the whole point of suid.. why are you trying to use it if you don't fully understand how it works?? it runs as whoever owns the file, rather than who actually executes it.