On Fri, Jan 11, 2002 at 09:35:10AM -0000, Adrian Flynn wrote:
> What is the correct kill signal to close a process and ALL its child
> processes cleanly? I am trying to stop and restart a shell script which
> pipes serial port data through several text procesing command. THere are 4
> processes in the process table for the script. When I kill -SIGINT, or
> kill -SIGTERM the shell processes, the other child processes remain running.
> Note it is important that all files are properly closed on termination so I
> cannot use SIGKILL.
If you used Perl you'd only have one process to kill :-) (and you'd have
some hope of doing the error checking I mentioned which is conspicuously
lacking in your shell pipe - or if you really don't care then leave error
checking out of the Perl script and use as is.) You could also add a
signal handler to the Perl script so that it trapped ^C and wrote out what
it still had in its buffer - be fun trying to get the shell pipe to do that.
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