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/*
* Check detaching from vfork'ed processes.
*
* Copyright (c) 2023 Dmitry V. Levin <ldv@strace.io>
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include <errno.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/wait.h>
int
main(int ac, char **av)
{
if (ac != 2)
error_msg_and_fail("ac = %d", ac);
signal(SIGTERM, SIG_IGN);
pid_t pid = vfork();
if (pid < 0)
perror_msg_and_fail("vfork");
if (!pid) {
sleep(4);
_exit(0);
}
int s;
pid_t rc;
while ((rc = waitpid(pid, &s, 0)) != pid) {
if (rc < 0 && errno == EINTR)
continue;
perror_msg_and_fail("waitpid: %d", pid);
}
const char *exe = getenv("STRACE_EXE") ?: "strace";
printf("%s: Process %d attached\n"
"%s: Process %d detached\n"
"%s: Termination of unknown pid %s ignored\n"
"%s: Process %d detached\n",
exe, pid,
exe, pid,
exe, av[1],
exe, getpid());
return WIFEXITED(s) ? WEXITSTATUS(s)
: (WIFSIGNALED(s) ? 128 + WTERMSIG(s) : 9);
}
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