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Re^2: How run a daemon as non-root user

by duckyd (Hermit)
on Dec 05, 2008 at 21:38 UTC ( [id://728390] : note . print w/replies, xml ) Need Help??


in reply to Re: How run a daemon as non-root user
in thread How run a daemon as non-root user

Unless I read the original post incorrectly, the poster is explicitly trying to avoid launching the daemons with root permissions...
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Re^3: How run a daemon as non-root user
by Joost (Canon) on Dec 05, 2008 at 22:25 UTC
      Well the pid is stored in /var/run and I can't put together the information to create a user like postgres or apache that can create a pid in /var/run other than root.

      I realize this is probably a silly question, so I can't imagine the answer would be too complicated. It's probably more of a OS issue than Perl, like I said I'm running Debian/Linux.

        Well, there are a couple of ways to solve this.
        1. Start the daemon as root, let it create the pid file, then drop the priviledges.
        2. Make /var/run group owned by the group 'daemons' (with group write permission). Start the deamon as a user that belongs to the group 'daemons'.
        3. Use file ACLs to allow the process to write to /var/run.
        4. Make /var/run world writable.
        5. Make a subdirectory in /var/run that's owned by the user running the daemon. Have the daemon use that subdirectory to write the pidfile into. (Any other directory works as well). You might consider putting a symlink from /var/run pointing to the new location.
        6. Create a (permanent) pidfile in /var/run that's owned by the user running the daemon. Let the daemon clear the pidfile when it exists upon removal. And where it currently associates a meaning to the (non-)existance of the pidfile, let it now associate a meaning to it being of (non-)zero size.
Re^3: How run a daemon as non-root user
by zentara (Archbishop) on Dec 06, 2008 at 17:05 UTC