78 lines
1.4 KiB
C
78 lines
1.4 KiB
C
/*
|
|
* Copyright (c) 2015-2018 Dmitry V. Levin <ldv@altlinux.org>
|
|
* All rights reserved.
|
|
*
|
|
* SPDX-License-Identifier: GPL-2.0-or-later
|
|
*/
|
|
|
|
#include "tests.h"
|
|
#include <assert.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#include <unistd.h>
|
|
#include <sys/wait.h>
|
|
|
|
static inline int
|
|
logit_(const char *const str)
|
|
{
|
|
return !chdir(str);
|
|
}
|
|
|
|
#define prefix "fork-f."
|
|
#define logit(arg) logit_(prefix arg)
|
|
|
|
int main(int ac, char **av)
|
|
{
|
|
if (ac < 1)
|
|
return 1;
|
|
if (ac > 1)
|
|
return logit("exec");
|
|
|
|
logit("start");
|
|
|
|
int child_wait_fds[2];
|
|
(void) close(0);
|
|
if (pipe(child_wait_fds))
|
|
perror_msg_and_fail("pipe");
|
|
|
|
pid_t pid = fork();
|
|
|
|
if (pid < 0)
|
|
perror_msg_and_fail("fork");
|
|
|
|
if (!pid) {
|
|
close(child_wait_fds[1]);
|
|
|
|
if (read(0, child_wait_fds, sizeof(int)))
|
|
_exit(2);
|
|
|
|
char *const args[] = { av[0], (char *) "", NULL };
|
|
if (logit("child") || execve(args[0], args, args + 1))
|
|
_exit(2);
|
|
}
|
|
|
|
close(0);
|
|
|
|
logit("parent");
|
|
close(child_wait_fds[1]);
|
|
|
|
int status;
|
|
assert(wait(&status) == pid);
|
|
assert(status == 0);
|
|
|
|
pid_t ppid = getpid();
|
|
logit("finish");
|
|
|
|
printf("%-5d chdir(\"%sstart\") = -1 ENOENT (%m)\n"
|
|
"%-5d chdir(\"%sparent\") = -1 ENOENT (%m)\n"
|
|
"%-5d chdir(\"%schild\") = -1 ENOENT (%m)\n"
|
|
"%-5d chdir(\"%sexec\") = -1 ENOENT (%m)\n"
|
|
"%-5d chdir(\"%sfinish\") = -1 ENOENT (%m)\n",
|
|
ppid, prefix,
|
|
ppid, prefix,
|
|
pid, prefix,
|
|
pid, prefix,
|
|
ppid, prefix);
|
|
return 0;
|
|
}
|