/* vi: set sw=4 ts=4: */ /* * fork test for uClibc * * Copyright (C) 2000 by Lineo, inc. and Erik Andersen * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org> * Written by Erik Andersen <andersen@uclibc.org> * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU Library General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at your * option) any later version. * * This program is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License * for more details. * * You should have received a copy of the GNU Library General Public License * along with this program; if not, write to the Free Software Foundation, * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #include <sys/wait.h> #define GOT1 (1 << 1) #define GOT2 (1 << 2) #define GOT3 (1 << 3) void child_handler(int sig) { fprintf(stderr, "I got a SIGCHLD\n"); } int main(void) { pid_t pid1, pid2, pid3; int status, result, wpid; signal(SIGCHLD, child_handler); if ((pid1 = fork()) == 0) { fprintf(stderr, "The child process sleeps 2 seconds...\n"); sleep(4); fprintf(stderr, "Child exiting.\n"); exit(-1); } if ((pid2 = fork()) == 0) { fprintf(stderr, "The child process sleeps 3 seconds...\n"); sleep(3); fprintf(stderr, "Child exiting.\n"); exit(-1); } if ((pid3 = fork()) == 0) { fprintf(stderr, "The child process sleeps 4 seconds...\n"); sleep(2); fprintf(stderr, "Child exiting.\n"); exit(-1); } fprintf(stderr, "Parent: waiting for the child to die.\n"); status = 0; while (1) { wpid = waitpid(pid1, &result, WNOHANG); if (wpid == pid1) status |= GOT1; wpid = waitpid(pid2, &result, WNOHANG); if (wpid == pid2) status |= GOT2; wpid = waitpid(pid3, &result, WNOHANG); if (wpid == pid3) status |= GOT3; if (status == (GOT1 | GOT2 | GOT3)) break; } fprintf(stderr, "Child process exited.\nGoodbye.\n"); return EXIT_SUCCESS; } /* Local Variables: c-file-style: "linux" c-basic-offset: 4 tab-width: 4 End: */