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/*
* Copyright 2000 Massachusetts Institute of Technology
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby
* granted, provided that both the above copyright notice and this
* permission notice appear in all copies, that both the above
* copyright notice and this permission notice appear in all
* supporting documentation, and that the name of M.I.T. not be used
* in advertising or publicity pertaining to distribution of the
* software without specific, written prior permission. M.I.T. makes
* no representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied
* warranty.
*
* THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS
* ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT
* SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
* USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* $FreeBSD: src/lib/libc/gen/pselect.c,v 1.6 2002/10/12 16:13:37 mike Exp $ */
/* modified for OpenBSD by Masahito Yamaga (2010-02-02) */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif /* HAVE_CONFIG_H */
#if !defined(HAVE_PSELECT) || defined(__OpenBSD__)
#include <sys/select.h>
#include <sys/time.h>
#include <errno.h>
#include <signal.h>
/*
* Emulate the POSIX 1003.1g-2000 `pselect' interface. This is the
* same as the traditional BSD `select' function, except that it uses
* a timespec rather than a timeval, doesn't modify the timeout argument,
* and allows the user to specify a signal mask to apply during the select.
*/
int
pselect(int count, fd_set * restrict rfds, fd_set * restrict wfds,
fd_set * restrict efds, const struct timespec * restrict timo,
const sigset_t * restrict mask)
{
sigset_t omask;
struct timeval tvtimo, *tvp;
int rv, sverrno;
if (timo) {
TIMESPEC_TO_TIMEVAL(&tvtimo, timo);
tvp = &tvtimo;
} else
tvp = 0;
if (mask != 0) {
rv = pthread_sigmask(SIG_SETMASK, mask, &omask);
if (rv != 0)
return rv;
}
rv = select(count, rfds, wfds, efds, tvp);
if (mask != 0) {
sverrno = errno;
pthread_sigmask(SIG_SETMASK, &omask, (sigset_t *)0);
errno = sverrno;
}
return rv;
}
#endif /* not HAVE_PSELECT || __OpenBSD__ */
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