Branch
Hash :
7b089321
Author :
Date :
2025-01-01T09:24:36
maint: run 'make update-copyright'
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149
/* Test of passing file descriptors.
Copyright (C) 2011-2025 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 defined __CYGWIN__
/* Cygwin does not support file-descriptor passing: As on Cygwin 3.5.3,
the only cmsg_type that winsup/cygwin/fhandler/socket_unix.cc handles
is SCM_CREDENTIALS. Not SCM_RIGHTS. */
return 90;
#elif 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 test_exit_status;
}
#else
errno = 0;
ASSERT(sendfd (0, 0) == -1);
ASSERT(errno == ENOSYS);
errno = 0;
ASSERT(recvfd (0, 0) == -1);
ASSERT(errno == ENOSYS);
if (test_exit_status != EXIT_SUCCESS)
return test_exit_status;
fputs ("skipping test: socketpair not supported on this system\n",
stderr);
return 77;
#endif
}