On Sun, Aug 15, 2021 at 07:23:53PM +0200, Claus Assmann wrote: > On Sun, Aug 15, 2021, Andreas Kusalananda Khri wrote: > > > wait returns 127 if the process is not a child of the current shell. > > Is it a child process of the current shell? If so, does it install a > > Yes, indirectly via 2-3 sh scripts.
Yeah, that won't work. wait only works for child processes of the current shell, not for grand-child processes etc. > > signal handler for the HUP signal? > > Yes, the "usual" one for a multi-threaded process: one thread which > handles signals and sends a single byte via a pipe to another thread > which then (hopefully) does the appropriate thing. > > So it seems better to use kill -0 PID to see whether the process > still exists. Yes, if you have the PID for it, otherwise pkill -0 with the apropriate options and pattern to pick the correct process out. -- Andreas (Kusalananda) Kähäri SciLifeLab, NBIS, ICM Uppsala University, Sweden .
