1/*- 2 * Copyright (c) 2012 Jukka A. Ukkonen 3 * All rights reserved. 4 * 5 * This software was developed by Jukka Ukkonen for FreeBSD. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29#include <sys/cdefs.h> 30__FBSDID("$FreeBSD$"); 31 32#include "namespace.h" 33#include <sys/types.h> 34#include <sys/wait.h> 35#include <stddef.h> 36#include <string.h> 37#include <signal.h> 38#include <errno.h> 39#include "un-namespace.h" 40#include "libc_private.h" 41 42int __waitid(idtype_t, id_t, siginfo_t *, int); 43 44int 45__waitid(idtype_t idtype, id_t id, siginfo_t *info, int flags) 46{ 47 int status; 48 pid_t ret; 49 50 ret = ((pid_t (*)(idtype_t, id_t, int *, int, struct __wrusage *, 51 siginfo_t *))__libc_interposing[INTERPOS_wait6])(idtype, id, 52 &status, flags, NULL, info); 53 54 /* 55 * According to SUSv4, waitid() shall not return a PID when a 56 * process is found, but only 0. If a process was actually 57 * found, siginfo_t fields si_signo and si_pid will be 58 * non-zero. In case WNOHANG was set in the flags and no 59 * process was found those fields are set to zero using 60 * memset() below. 61 */ 62 if (ret == 0 && info != NULL) 63 memset(info, 0, sizeof(*info)); 64 else if (ret > 0) 65 ret = 0; 66 return (ret); 67} 68 69__weak_reference(__waitid, waitid); 70__weak_reference(__waitid, _waitid); 71