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  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.

RETURN VALUES

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

Debian                                           August 16, 2013                                      PSELECT(2)