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