pselect — synchronous I/O multiplexing a la POSIX.1g
Standard C Library (libc, −lc)
pselect(int nfds, fd_set * restrict readfds, fd_set * restrict writefds, fd_set * restrict exceptfds, const struct timespec * restrict timeout, const sigset_t * restrict newsigmask);
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 const struct timespec rather than the (modifiable) struct timeval 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 returns the same values and under the same conditions as select().
The pselect() function conforms to IEEE Std 1003.1-2001 (’’POSIX.1’’).
The pselect() function first appeared in FreeBSD 5.0.
The first implementation of pselect() function and this manual page were written by Garrett Wollman <wollman [AT] FreeBSD.org>.
BSD August 16, 2013 BSD