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PSELECT(2) BSD System Calls Manual PSELECT(2) NAME pselect -- synchronous I/O multiplexing a la POSIX.1g LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <sys/select.h> int 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); DESCRIPTION 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 anal- ogous 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() re- turns, the original signal mask is restored. See select(2) for a more detailed discussion of the semantics of this in- terface, and for macros used to manipulate the fd_set data type. RETURN VALUES The pselect() function returns the same values and under the same condi- tions as select(). ERRORS The pselect() function may fail for any of the reasons documented for select(2) and (if a signal mask is provided) sigprocmask(2). SEE ALSO kqueue(2), poll(2), select(2), sigprocmask(2), sigsuspend(2) STANDARDS The pselect() function conforms to IEEE Std 1003.1-2001 ("POSIX.1"). HISTORY The pselect() function first appeared in FreeBSD 5.0. AUTHORS The first implementation of pselect() function and this manual page were written by Garrett Wollman <wollman@FreeBSD.org>. BSD August 16, 2013 BSD
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | AUTHORS
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