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pselect(2)

What

Safely wait for a signal or for a file descriptor to be ready.

Linux will also provide the analogous ppoll(2) and epoll_pwait(2).

When

Linux 2.6.16?

glibc currently has a broken (non-atomic) implementation of pselect(2).

Where

Specified in SUSv3; but not widely available.

(C) 2006, Michael Kerrisk