/* Test duplicating non-inheritable file descriptors.
- Copyright (C) 2009 Free Software Foundation, Inc.
+ Copyright (C) 2009-2011 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 <errno.h>
#include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
#include <unistd.h>
#if (defined _WIN32 || defined __WIN32__) && ! defined __CYGWIN__
# include <windows.h>
#endif
-#define ASSERT(expr) \
- do \
- { \
- if (!(expr)) \
- { \
- fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
- fflush (stderr); \
- abort (); \
- } \
- } \
- while (0)
+#include "binary-io.h"
+#include "macros.h"
/* Return non-zero if FD is open and inheritable across exec/spawn. */
static int
#endif
}
+#if !O_BINARY
+# define setmode(f,m) zero ()
+static int zero (void) { return 0; }
+#endif
+
+/* Return non-zero if FD is open in the given MODE, which is either
+ O_TEXT or O_BINARY. */
+static int
+is_mode (int fd, int mode)
+{
+ int value = setmode (fd, O_BINARY);
+ setmode (fd, value);
+ return mode == value;
+}
+
int
main (void)
{
ASSERT (!is_inheritable (fd));
ASSERT (close (fd2) == 0);
+ /* On systems that distinguish between text and binary mode,
+ dup_cloexec reuses the mode of the source. */
+ setmode (fd, O_BINARY);
+ ASSERT (is_mode (fd, O_BINARY));
+ fd2 = dup_cloexec (fd);
+ ASSERT (fd < fd2);
+ ASSERT (is_mode (fd2, O_BINARY));
+ ASSERT (close (fd2) == 0);
+ setmode (fd, O_TEXT);
+ ASSERT (is_mode (fd, O_TEXT));
+ fd2 = dup_cloexec (fd);
+ ASSERT (fd < fd2);
+ ASSERT (is_mode (fd2, O_TEXT));
+ ASSERT (close (fd2) == 0);
+
/* Test error handling. */
errno = 0;
ASSERT (set_cloexec_flag (-1, false) == -1);