/* Test duplicating file descriptors.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009-2013 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
#include <unistd.h>
+#include "signature.h"
+SIGNATURE_CHECK (dup3, int, (int, int, int));
+
#include <errno.h>
#include <fcntl.h>
#include <stdbool.h>
-#include <stdio.h>
-#include <stdlib.h>
#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
-/* Get declarations of the Win32 API functions. */
+/* Get declarations of the native Windows API functions. */
# define WIN32_LEAN_AND_MEAN
# include <windows.h>
+/* Get _get_osfhandle. */
+# include "msvc-nothrow.h"
#endif
#include "binary-io.h"
-
-#define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- fflush (stderr); \
- abort (); \
- } \
- } \
- while (0)
+#include "macros.h"
/* Return true if FD is open. */
static bool
is_open (int fd)
{
#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
- /* On Win32, the initial state of unassigned standard file
+ /* On native Windows, the initial state of unassigned standard file
descriptors is that they are open but point to an
INVALID_HANDLE_VALUE, and there is no fcntl. */
return (HANDLE) _get_osfhandle (fd) != INVALID_HANDLE_VALUE;
main ()
{
int use_cloexec;
+ int bad_fd = getdtablesize ();
-#if defined O_CLOEXEC
+#if O_CLOEXEC
for (use_cloexec = 0; use_cloexec <= 1; use_cloexec++)
#else
use_cloexec = 0;
char buffer[1];
o_flags = 0;
-#if defined O_CLOEXEC
+#if O_CLOEXEC
if (use_cloexec)
- o_flags |= O_CLOEXEC;
+ o_flags |= O_CLOEXEC;
#endif
/* Assume std descriptors were provided by invoker. */
errno = 0;
ASSERT (dup3 (fd, -2, o_flags) == -1);
ASSERT (errno == EBADF);
+ if (bad_fd > 256)
+ {
+ ASSERT (dup3 (fd, 255, 0) == 255);
+ ASSERT (dup3 (fd, 256, 0) == 256);
+ ASSERT (close (255) == 0);
+ ASSERT (close (256) == 0);
+ }
+ ASSERT (dup3 (fd, bad_fd - 1, 0) == bad_fd - 1);
+ ASSERT (close (bad_fd - 1) == 0);
errno = 0;
- ASSERT (dup3 (fd, 10000000, o_flags) == -1);
+ ASSERT (dup3 (fd, bad_fd, o_flags) == -1);
ASSERT (errno == EBADF);
/* Using dup3 can skip fds. */
ASSERT (!is_open (fd + 1));
ASSERT (is_open (fd + 2));
if (use_cloexec)
- ASSERT (is_cloexec (fd + 2));
+ ASSERT (is_cloexec (fd + 2));
else
- ASSERT (!is_cloexec (fd + 2));
+ ASSERT (!is_cloexec (fd + 2));
/* Verify that dup3 closes the previous occupant of a fd. */
ASSERT (open ("/dev/null", O_WRONLY, 0600) == fd + 1);