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PSELECT(2)		      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
       analogous arguments of select().	 The  timeout  argument	 in  pselect()
       points  to  a const struct timespec rather than the potentially modifi-
       able struct timeval used	by select(); as	in select(),  a	 null  pointer
       may be passed to	indicate that pselect()	should wait indefinitely.  Fi-
       nally,  newsigmask  specifies  a	signal mask which is set while waiting
       for input.  When	pselect() returns, the original	 signal	 mask  is  re-
       stored.	 If  newsigmask	 is  a	null  pointer,	pselect() behaves like
       select()	with no	setting	or restoration of the signal mask.

       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 con-
       ditions 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>.

FreeBSD	13.2			 July 2, 2022			    PSELECT(2)
NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUES | ERRORS | SEE ALSO | STANDARDS | HISTORY | AUTHORS

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