Re: daemons logging to a file

Bernhard Graf <[email protected]> wrote:
> I want to run a program under svscan with logs piped to multilog.
> Unfortunately this program can only log to either syslog or to a file.

Does it treat the filename "-" as shorthand for stdout?

> My first idea was a fifo, that is read by a program that prints to
> stdout (cat) and let the program log to this fifo ... something like
>
> test -e "$fifo" && rm -f "$fifo"
> mknod -m666 $fifo p

I see no reason to delete and recreate the fifo in the run script.
Just create it once, and let the daemon and multilog always use that
same fifo.

> cat $fifo &
> exec setuidgid $uid $program

You don't need cat.  multilog can read from the fifo instead of from
the pipe set up by svscan.  In log/run:
#!/bin/sh
exec \
setuidgid whoever \
multilog t ./main < ../fifo

> Has anyone a better idea (besides patching the program or using
> another one)?

If "-" doesn't work, ask the program's maintainer to allow logging to
stdout/stderr.


paul