On Sun, 29 Oct 2023, Ramiro Aceves wrote:
if [ -x /root/nettest ]; then
/root/nettest &
fi
Redirect the output of your script somewhere and then it shoould be OK:
```
if [ -x /root/nettest ]; then
/root/nettest >/root/nettest.log 2>&1 &
fi
```
(Or, use logger(1) on all output within the script.)
What's happening here can be understood if you look at the 2nd last
line of /etc/rc which is:
```
rc_real_work "$@" 2>&1 | rc_postprocess
```
The rc_real_work() function runs all the rc scripts in /etc/rc.d/
including /etc/rc.local (via /etc/rc.d/local), and _all_ output is,
as you can see, piped to rc_postprocess()
When all the scripts finish, /etc/rc exits, and so does the RHS of
that pipeline ie. whatever's running rc_postprocess(). So, anything
started by rc_real_work() will get a SIGPIPE as soon as it tries
to write stuff to its stdout/stderr.
The nohup command also didn't work for the same reason. The nohup
man-page says:
If the standard output is a terminal, the standard output
is appended to the file nohup.out in the current directory.
If standard error is a terminal, it is directed to the same
place as the standard output.
Well, here the output of _all_ the scripts is a pipe, so nohup
doesn't redirect the output of your command into a nohup.out file
and here too it gets a SIGPIPE.
HTH,
-RVP
