Metin KAYA writes:
> Yes Rick, I'm asking this "indefinitely" issue. Is there anything that
> handle this NULL situation a signal, or etc.? How does Linux or
> FreeBSD behave?

Please don't top-post.

Like most other system calls that block "indefinitely", select(2) will
be interrupted by signals. This is *also* documented in the man page
you didn't read:

[EINTR] A signal was delivered before the time limit expired
and before any of the selected events occurred.

See sigaction(2) for details on how to modify the way system calls
behave when a signal is delivered.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no
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