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The double fork prevents zombie processes by forcing the kernel to set its parent to PID 1, which is supposed to clean up zombies. It sounds like Transmission already does it, since its parent is already process 1.

Jander
– Jander

2012-06-03 21:48:40 +00:00
Commented Jun 3, 2012 at 21:48
1

There are multiple problems here. #1: Only the parent should call exit(3); the children should call _exit(2) instead (otherwise you get multiple stdio flushes, among other issues). #2: That execvp(3) could use a perror(3) if it fails. #3: You should just use signal(SIGCHLD, SIG_IGN) instead of this whole mess.

Kevin
– Kevin

2015-09-22 20:40:26 +00:00
Commented Sep 22, 2015 at 20:40

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