1 /* 2 * Copyright (c) 2000 Ben Lindstrom. All rights reserved. 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 ``AS IS'' AND ANY EXPRESS OR 14 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 15 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 16 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 17 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 18 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 19 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 20 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 21 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 22 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 23 */ 24 25 #include "includes.h" 26 27 #ifndef HAVE_WAITPID 28 #include <errno.h> 29 #include <sys/wait.h> 30 #include "bsd-waitpid.h" 31 32 pid_t 33 waitpid(int pid, int *stat_loc, int options) 34 { 35 union wait statusp; 36 pid_t wait_pid; 37 38 if (pid <= 0) { 39 if (pid != -1) { 40 errno = EINVAL; 41 return (-1); 42 } 43 /* wait4() wants pid=0 for indiscriminate wait. */ 44 pid = 0; 45 } 46 wait_pid = wait4(pid, &statusp, options, NULL); 47 if (stat_loc) 48 *stat_loc = (int) statusp.w_status; 49 50 return (wait_pid); 51 } 52 53 #endif /* !HAVE_WAITPID */ 54
