install-reloc: Support multi-binary installation.

[gnulib.git] / tests / test-cloexec.c

diff --git a/tests/test-cloexec.c b/tests/test-cloexec.c
index 8df733a..fe2ca3a 100644 (file)
--- a/tests/test-cloexec.c
+++ b/tests/test-cloexec.c
@@ -1,5 +1,5 @@
 /* Test duplicating non-inheritable 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
@@ -22,34 +22,25 @@
 
 #include <errno.h>
 #include <fcntl.h>
-#include <stdio.h>
-#include <stdlib.h>
 #include <unistd.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
 
-#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
 is_inheritable (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.  */
   HANDLE h = (HANDLE) _get_osfhandle (fd);
@@ -66,12 +57,28 @@ is_inheritable (int fd)
 #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)
 {
   const char *file = "test-cloexec.tmp";
   int fd = creat (file, 0600);
   int fd2;
+  int bad_fd = getdtablesize ();
 
   /* Assume std descriptors were provided by invoker.  */
   ASSERT (STDERR_FILENO < fd);
@@ -94,12 +101,27 @@ 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);
   ASSERT (errno == EBADF);
   errno = 0;
-  ASSERT (set_cloexec_flag (10000000, false) == -1);
+  ASSERT (set_cloexec_flag (bad_fd, false) == -1);
   ASSERT (errno == EBADF);
   errno = 0;
   ASSERT (set_cloexec_flag (fd2, false) == -1);
@@ -108,7 +130,7 @@ main (void)
   ASSERT (dup_cloexec (-1) == -1);
   ASSERT (errno == EBADF);
   errno = 0;
-  ASSERT (dup_cloexec (10000000) == -1);
+  ASSERT (dup_cloexec (bad_fd) == -1);
   ASSERT (errno == EBADF);
   errno = 0;
   ASSERT (dup_cloexec (fd2) == -1);