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/* Test of passing file descriptors.
Copyright (C) 2011-2023 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#include <config.h>
#include "passfd.h"
#include <errno.h>
#include <fcntl.h>
#include <signal.h>
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include "macros.h"
int
main ()
{
#if HAVE_SOCKETPAIR
int pair[2];
int ret;
pid_t pid;
int status;
int fdnull;
int fd;
struct stat st;
# if HAVE_DECL_ALARM
/* Avoid hanging on failure. */
int alarm_value = 5;
signal (SIGALRM, SIG_DFL);
alarm (alarm_value);
# endif
fdnull = open ("/dev/null", O_RDWR);
if (fdnull < 0)
{
perror ("Could not open /dev/null");
return 1;
}
ret = socketpair (AF_UNIX, SOCK_STREAM, 0, pair);
if (ret < 0)
{
perror ("socket pair failed");
return 2;
}
pid = fork ();
if (pid == -1)
{
perror ("fork");
return 3;
}
if (pid == 0)
{
ret = sendfd (pair[1], fdnull);
if (ret == -1)
{
perror ("sendfd");
return 64;
}
return 0;
}
/* father */
else
{
ASSERT (close (pair[1]) == 0);
fd = recvfd (pair[0], 0);
if (fd == -1)
{
perror ("recvfd");
return 16;
}
ret = waitpid (pid, &status, 0);
if (ret == -1)
{
perror ("waitpid");
return 17;
}
ASSERT (ret == pid);
if (!WIFEXITED (status))
{
fprintf (stderr, "Child does not normally exit\n");
return 65;
}
ret = WEXITSTATUS (status);
if (ret != 0)
{
fprintf (stderr, "Send fd fail\n");
return ret;
}
/* try to stat new fd */
ret = fstat (fd, &st);
if (ret < 0)
{
perror ("fstat");
return 80;
}
/* Check behavior when sender no longer around */
errno = 0;
fd = recvfd (pair[0], 0);
ASSERT (fd == -1);
ASSERT (errno == ENOTCONN);
return 0;
}
#else
errno = 0;
ASSERT(sendfd (0, 0) == -1);
ASSERT(errno == ENOSYS);
errno = 0;
ASSERT(recvfd (0, 0) == -1);
ASSERT(errno == ENOSYS);
fputs ("skipping test: socketpair not supported on this system\n",
stderr);
return 77;
#endif
}
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