Re: linux bug in pclose

Matthias Urlichs (smurf@smurf.noris.de)
Sun, 14 Jul 1996 12:06:49 +0100

In linux.dev.kernel, article <199607130642.IAA17936@wn1.sci.kun.nl>,
Michiel Boland <boland@sci.kun.nl> writes:
>=20
> So, to fix your program, you should check inside the SIGCHLD
> handler *what* child has exited, and realize that wait() may
> return -1 when someone else already waited for the child.
>=20
Note also that if you know which process you want to wait for, you shou=
ld
use waitpid() or wait4() instead of wait().

Note also that _any_ process can in fact have extra children it doesn't
know about. This happens if a process calls fork() and then the father
exec()s your program instead of the child.

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