mirror of
https://github.com/facebookexperimental/reverie.git
synced 2025-01-23 13:10:04 +00:00
20c7020868
Summary: The OSS license linter doesn't like the word "its". Reviewed By: johnhurt Differential Revision: D36856385 fbshipit-source-id: 909037d96de8976f08004497d28b77838f8c6870
64 lines
1.5 KiB
C
64 lines
1.5 KiB
C
/*
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* Copyright (c) Meta Platforms, Inc. and affiliates.
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*
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* All rights reserved.
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*
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* This source code is licensed under the BSD-style license found in the
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* LICENSE file in the root directory of this source tree.
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*/
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#include <errno.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <time.h>
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#include <unistd.h>
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void sigchld_handler(int sig, siginfo_t* _info, void* _context) {
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if (sig != SIGCHLD) {
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fprintf(stderr, "unexpected signal %d != SIGCHLD\n", sig);
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abort();
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}
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char buf[256];
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int n = snprintf(buf, 256, "%d caught SIGCHLD\n", getpid());
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write(1, buf, n);
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_exit(0);
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}
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int main(int argc, char* argv[], char* envp[]) {
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struct sigaction sa;
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memset(&sa, 0, sizeof(sa));
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sa.sa_sigaction = sigchld_handler;
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sa.sa_flags = SA_RESTART | SA_SIGINFO;
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if (sigaction(SIGCHLD, &sa, NULL) != 0) {
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fprintf(stderr, "sigaction failed: %s\n", strerror(errno));
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exit(1);
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}
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if (argc == 2 && strcmp(argv[1], "child") == 0) {
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printf("exec pid: %u\n", getpid());
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_exit(0);
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}
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pid_t pid = fork();
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if (pid < 0) {
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perror("fork failed: ");
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exit(1);
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} else if (pid == 0) {
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char* prog = argv[0];
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char* const newArgv[] = {prog, "child", NULL};
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printf("child pid: %u\n", getpid());
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execve(prog, newArgv, envp);
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printf("exec failed: %s\n", strerror(errno));
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} else {
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printf("parent pid: %u\n", getpid());
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struct timespec tp = {900, 0};
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nanosleep(&tp, NULL);
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}
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}
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