sigwait.c revision 277317
1/*- 2 * Copyright (c) 2010 davidxu@freebsd.org 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions 6 * are met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in the 11 * documentation and/or other materials provided with the distribution. 12 * 13 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 14 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 15 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 16 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 17 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 18 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 19 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 20 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 21 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 22 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 23 * SUCH DAMAGE. 24 */ 25 26#include <sys/cdefs.h> 27__FBSDID("$FreeBSD: stable/10/lib/libc/sys/sigwait.c 277317 2015-01-18 11:54:20Z kib $"); 28 29#include <errno.h> 30#include <signal.h> 31#include "libc_private.h" 32 33__weak_reference(__libc_sigwait, __sigwait); 34 35#pragma weak sigwait 36int 37sigwait(const sigset_t *set, int *sig) 38{ 39 40 return (((int (*)(const sigset_t *, int *)) 41 __libc_interposing[INTERPOS_sigwait])(set, sig)); 42} 43 44int 45__libc_sigwait(const sigset_t *set, int *sig) 46{ 47 int ret; 48 49 /* POSIX does not allow EINTR to be returned */ 50 do { 51 ret = __sys_sigwait(set, sig); 52 } while (ret == EINTR); 53 return (ret); 54} 55