How can I link 2 processes so when one crashes make the other one crash too?

Question

I am writing a bash program that has IPC between two proccesses (A and B) via named pipes. I am worried because if A crashes, B may be blocked indefinitely (and vice versa), because named pipes are blocking. Can I link A and B so, if A crashes, force B to crash too? Any other alternatives to solve this blocking problem would be appreciated.

Thank you in advance.

Why not run communication in the separate thread and kill it if it's blocked for a long time? — Eugene Mayevski 'Callback, Jan 05 '11 at 17:48

score 0 · Accepted Answer · answered Jan 05 '11 at 17:30

0

You may need an additional process "C" that monitors the activity of process "A" and process "B"

answered Jan 05 '11 at 17:30

You mean a process that has the pid of A and B and check regularly? – Javier J. Salmeron Garcia Jan 05 '11 at 17:33

score 0 · Answer 2 · answered Jan 05 '11 at 17:45

If you are talking about a bash script? If so you could trap the signal sent to A to kill it and then send a signal to B so it exits.

The relevant bash features are: trap and kill. And the relevant signals would be SIGKILL, SIGINT, SIGHUP, etc. Invoking: trap -l will list all the possible signals.

How can I link 2 processes so when one crashes make the other one crash too?

2 Answers2