PSELECT(3) BSD Library Functions Manual PSELECT(3)

NAME
     ppsseelleecctt - synchronous I/O multiplexing a la POSIX.1g

LLIIBBRRAARRYY
     Standard C Library (libc, -lc)

SYNOPSIS
     ##iinncclluuddee <>

     int
     ppsseelleecctt(int nfds, fdset * restrict readfds, fdset * restrict writefds,
         fdset * restrict exceptfds,
         const struct timespec * restrict timeout,
         const sigsett * restrict newsigmask);

DESCRIPTION
     The ppsseelleecctt() 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 sseelleecctt().  The timeout argument in ppsseelleecctt() points to
     a const struct timespec rather than the (modifiable) struct timeval used
     by sseelleecctt(); as in sseelleecctt(), a null pointer may be passed to indicate
     that ppsseelleecctt() should wait indefinitely.  Finally, newsigmask specifies a
     signal mask which is set while waiting for input.  When ppsseelleecctt()
     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 fdset data type.

IIMMPPLLEEMMEENNTTAATTIIOONN NNOOTTEESS
     The ppsseelleecctt() function is implemented in the C library as a wrapper
     around sseelleecctt().

RETURN VALUES
     The ppsseelleecctt() function returns the same values and under the same condi-
     tions as sseelleecctt().

EERRRROORRSS
     The ppsseelleecctt() 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)

STANDARDS
     The ppsseelleecctt() function conforms to IEEE Std 1003.1-2001 (``POSIX.1'').

HISTORY     The ppsseelleecctt() function first appeared in FreeBSD 5.0.

AUTHORS     The ppsseelleecctt() function and this manual page were written by Garrett
     Wollman .

BSD                              June 16, 2002                             BSD