/* vi: set sw=4 ts=4: */ /* * clone test for uClibc * Copyright (C) 2000-2006 by Erik Andersen <andersen@uclibc.org> * * Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. */ #include <stdio.h> #include <stdlib.h> #include <unistd.h> #include <signal.h> #include <sched.h> #include <sys/wait.h> #include "clone_cruft.h" #define GOT1 (1 << 1) #define GOT2 (1 << 2) #define GOT3 (1 << 3) #define ALLGOT (GOT1|GOT2|GOT3) static void child_handler(int sig) { printf("I got a SIGCHLD\n"); } static int clone_main(void *arg) { unsigned long input = (unsigned long)arg; int secs = (input / 10) * 4; printf("Clone got %lu, sleeping for %i secs\n", input, secs); sleep(secs); return input + 20; } int main(void) { int clone1, clone2, clone3; char clone1_stack[8192], clone2_stack[8192], clone3_stack[8192]; int status, nostatus, result, wpid; signal(SIGCHLD, child_handler); if ((clone1 = do_clone(clone_main, clone1_stack, 0, (void*)11)) == -1) { perror("Clone 1 failed"); exit(-1); } if ((clone2 = do_clone(clone_main, clone2_stack, 0, (void*)22)) == -1) { perror("Clone 2 failed"); exit(-2); } if ((clone3 = do_clone(clone_main, clone3_stack, 0, (void*)33)) == -1) { perror("Clone 3 failed"); exit(-3); } sleep(1); printf("Parent: waiting for the clones to die.\n"); nostatus = status = 0; while (1) { if ((wpid = waitpid(clone1, &result, WNOHANG|__WCLONE)) == -1) nostatus |= GOT1; if (wpid == clone1) { status |= GOT1; printf("Clone1 gave back %i\n", WEXITSTATUS(result)); } if ((wpid = waitpid(clone2, &result, WNOHANG|__WCLONE)) == -1) nostatus |= GOT2; if (wpid == clone2) { status |= GOT2; printf("Clone2 gave back %i\n", WEXITSTATUS(result)); } if ((wpid = waitpid(clone3, &result, WNOHANG|__WCLONE)) == -1) nostatus |= GOT3; if (wpid == clone3) { status |= GOT3; printf("Clone3 gave back %i\n", WEXITSTATUS(result)); } if (status == ALLGOT || nostatus == ALLGOT) break; } if (status == ALLGOT) { printf("Clones exited.\nGoodbye.\n"); return EXIT_SUCCESS; } else { perror("Waiting for clones failed"); return EXIT_FAILURE; } } /* Local Variables: c-file-style: "linux" c-basic-offset: 4 tab-width: 4 End: */