Re^4: Vague segfault question

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

Comment on Re^4: Vague segfault question

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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]