1 /* @(#)wwchild.c 8.1 (Berkeley) 6/6/93 */ 2 /* $NetBSD: wwchild.c,v 1.8 2006/12/18 20:04:55 christos Exp $ */ 3 4 /* 5 * Copyright (c) 1983, 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * Edward Wang at The University of California, Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 */ 35 36 #include <sys/types.h> 37 #include <sys/wait.h> 38 #include <errno.h> 39 #include "ww.h" 40 41 void 42 wwchild(int dummy __unused) 43 { 44 int olderrno; 45 struct ww **wp; 46 int status; 47 int pid; 48 char collected = 0; 49 50 olderrno = errno; 51 while ((pid = 52 wait3(&status, WNOHANG|WUNTRACED, (struct rusage *)0)) > 0) { 53 for (wp = wwindex; wp < &wwindex[NWW]; wp++) { 54 if (*wp && (*wp)->ww_state == WWS_HASPROC 55 && (*wp)->ww_pid == pid) { 56 (*wp)->ww_state = WWS_DEAD; 57 collected = 1; 58 break; 59 } 60 } 61 } 62 errno = olderrno; 63 /* jump out of wwiomux when somebody dies */ 64 if (collected) 65 wwsetintr(); 66 } 67