Re^3: Vague segfault question


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by ChrisDennis (Sexton)

on Feb 04, 2012 at 13:04 UTC ( [id://951796]=note: print w/replies, xml )

Need Help??

Thanks for your reply.

I'm confused now about the use of kill.

Kill says

Unlike in the shell, if SIGNAL is negative, it kills process groups instead of processes.

But perlipc says

Sending a signal to a negative process ID means that you send the signal to the entire Unix process group.

Which of those is true?

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Re^4: Vague segfault question by Anonymous Monk on Feb 04, 2012 at 14:38 UTC
Which of those is true? Both, they're not mutually exclusive :) if you keep reading it also says The behavior of kill when a PROCESS number is zero or negative depends on the operating system. For example, on POSIX-conforming systems, zero will signal the current process group and -1 will signal all processes. See also what perlport#kill says	[reply]
Re^5: Vague segfault question by ChrisDennis (Sexton) on Feb 05, 2012 at 21:07 UTC
The kill documentation seems to omit what the Camel book adds, that a negative process id (not just -1) will kill all processes in the process group on Posix-conforming systems.	[reply]
Re^6: Vague segfault question by Anonymous Monk on Feb 06, 2012 at 08:58 UTC
When the docs say it depends on the operating system, you're supposed to consult the operating system documentation (man kill)	[reply]

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