On 02/03/2016 23:52, Jan Olszak wrote:
> #!/usr/bin/execlineb -P
> if -nt
> {
> backtick -n S6_LOG_ARGS
> {
> redirfd -r 0 /opt/s6logargs.opts s6-cat
> }
> import -u S6_LOG_ARGS s6-log T $S6_LOG_ARGS
> }
> s6-log T s1000000 n10 /var/log/syslogd
That won't work for several reasons:
* the if -nt will only return once s6-log returns. Since s6-log is a
long-lived program, that won't happen unless there's an error in the
s6-log invocation. Which is what is happening here.
* execline is not like the shell: when you import S6_LOG_ARGS, it is
evaluated as just one word - it's not split. So your s6-log invocation
is given two arguments: T, and whatever is in S6_LOG_ARGS. Likely
s6-log cannot interpret the contents of your opts file as one single
argument, so it fails - and dies, and if returns, and you get the
fallback.
* Even if s6-log succeeded, you'd have the "if" process hanging around,
and s6-log would be a child of if. That's not what you want: you always
want the process to execute into your chosen avatar of s6-log in the end.
Try something like this:
-----
backtick -n -D "s1000000 n10 /var/log/syslogd" S6_LOG_ARGS
{
redirfd -r 0 /opt/s6logargs.opts s6-cat
}
import -u -s S6_LOG_ARGS # notice the -s, to split the args
s6-log T ${S6_LOG_ARGS}
-----
Also, traditionally, /opt is not a good place to store regular files,
even global ones - you'd use /etc or a subdirectory of /etc for that.
But that's your business. :)
--
Laurent
Received on Thu Mar 03 2016 - 01:09:23 UTC