1/* 2 * Copyright 2000 Massachusetts Institute of Technology 3 * 4 * Permission to use, copy, modify, and distribute this software and 5 * its documentation for any purpose and without fee is hereby 6 * granted, provided that both the above copyright notice and this 7 * permission notice appear in all copies, that both the above 8 * copyright notice and this permission notice appear in all 9 * supporting documentation, and that the name of M.I.T. not be used 10 * in advertising or publicity pertaining to distribution of the 11 * software without specific, written prior permission. M.I.T. makes 12 * no representations about the suitability of this software for any 13 * purpose. It is provided "as is" without express or implied 14 * warranty. 15 * 16 * THIS SOFTWARE IS PROVIDED BY M.I.T. ``AS IS''. M.I.T. DISCLAIMS 17 * ALL EXPRESS OR IMPLIED WARRANTIES WITH REGARD TO THIS SOFTWARE, 18 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF 19 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT 20 * SHALL M.I.T. BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF 23 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND 24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 25 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 26 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 27 * SUCH DAMAGE. 28 */ 29 30/* $FreeBSD: src/lib/libc/gen/pselect.c,v 1.6 2002/10/12 16:13:37 mike Exp $ */ 31/* modified for OpenBSD by Masahito Yamaga (2010-02-02) */ 32 33#ifdef HAVE_CONFIG_H 34#include "config.h" 35#endif /* HAVE_CONFIG_H */ 36 37#if !defined(HAVE_PSELECT) || defined(__OpenBSD__) 38 39#include <sys/select.h> 40#include <sys/time.h> 41#include <errno.h> 42#include <signal.h> 43 44/* 45 * Emulate the POSIX 1003.1g-2000 `pselect' interface. This is the 46 * same as the traditional BSD `select' function, except that it uses 47 * a timespec rather than a timeval, doesn't modify the timeout argument, 48 * and allows the user to specify a signal mask to apply during the select. 49 */ 50int 51pselect(int count, fd_set * restrict rfds, fd_set * restrict wfds, 52 fd_set * restrict efds, const struct timespec * restrict timo, 53 const sigset_t * restrict mask) 54{ 55 sigset_t omask; 56 struct timeval tvtimo, *tvp; 57 int rv, sverrno; 58 59 if (timo) { 60 TIMESPEC_TO_TIMEVAL(&tvtimo, timo); 61 tvp = &tvtimo; 62 } else 63 tvp = 0; 64 65 if (mask != 0) { 66 rv = pthread_sigmask(SIG_SETMASK, mask, &omask); 67 if (rv != 0) 68 return rv; 69 } 70 71 rv = select(count, rfds, wfds, efds, tvp); 72 if (mask != 0) { 73 sverrno = errno; 74 pthread_sigmask(SIG_SETMASK, &omask, (sigset_t *)0); 75 errno = sverrno; 76 } 77 78 return rv; 79} 80 81#endif /* not HAVE_PSELECT || __OpenBSD__ */ 82