pselect — synchronous I/O multiplexing a la POSIX.1g

The first implementation of pselect() function and this manual page were written by Garrett Wollman <wollman@FreeBSD.org>. Debian August 16, 2013 PSELECT(2)

The pselect() function was introduced by IEEE Std 1003.1g-2000 (“POSIX.1”) as a slightly stronger version of select(2). The nfds, readfds, writefds, and exceptfds arguments are all identical to the analogous arguments of select(). The timeout argument in pselect() points to a conststructtimespec rather than the (modifiable) structtimeval used by select(); as in select(), a null pointer may be passed to indicate that pselect() should wait indefinitely. Finally, newsigmask specifies a signal mask which is set while waiting for input. When pselect() returns, the original signal mask is restored. See select(2) for a more detailed discussion of the semantics of this interface, and for macros used to manipulate the fd_set data type.

The pselect() function may fail for any of the reasons documented for select(2) and (if a signal mask is provided) sigprocmask(2).

The pselect() function first appeared in FreeBSD 5.0.

Standard C Library (libc, -lc)

pselect — synchronous I/O multiplexing a la POSIX.1g

The pselect() function returns the same values and under the same conditions as select().

kqueue(2), poll(2), select(2), sigprocmask(2), sigsuspend(2)

The pselect() function conforms to IEEE Std 1003.1-2001 (“POSIX.1”).

#include<sys/select.h>intpselect(intnfds, fd_set*restrictreadfds, fd_set*restrictwritefds, fd_set*restrictexceptfds, conststructtimespec*restricttimeout, constsigset_t*restrictnewsigmask);