X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-freopen.c;h=a98530c950edcd2bc4fa7275cc1890f5d91b7d37;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=08214fa4499ac4b3d9c5e71a1a34b6753ba03ca3;hpb=b2e2010c7c902235b5efb5bd3c6529f61b093aa4;p=gnulib.git

diff --git a/tests/test-freopen.c b/tests/test-freopen.c
index 08214fa44..a98530c95 100644
--- a/tests/test-freopen.c
+++ b/tests/test-freopen.c
@@ -1,5 +1,5 @@
 /* Test of opening a file stream.
-   Copyright (C) 2007-2010 Free Software Foundation, Inc.
+   Copyright (C) 2007-2014 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
@@ -23,12 +23,60 @@
 #include "signature.h"
 SIGNATURE_CHECK (freopen, FILE *, (char const *, char const *, FILE *));
 
+#include <errno.h>
+#include <unistd.h>
+
 #include "macros.h"
 
 int
 main ()
 {
+  const char *filename = "test-freopen.txt";
+
   ASSERT (freopen ("/dev/null", "r", stdin) != NULL);
 
+#if 0 /* freopen (NULL, ...) is unsupported on most platforms.  */
+  /* Test that freopen() sets errno if someone else closes the stream
+     fd behind the back of stdio.  */
+  {
+    FILE *fp = fopen (filename, "w+");
+    ASSERT (fp != NULL);
+    ASSERT (close (fileno (fp)) == 0);
+    errno = 0;
+    ASSERT (freopen (NULL, "r", fp) == NULL);
+    perror("freopen");
+    ASSERT (errno == EBADF);
+    fclose (fp);
+  }
+
+  /* Test that freopen() sets errno if the stream was constructed with
+     an invalid file descriptor.  */
+  {
+    FILE *fp = fdopen (-1, "w+");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (freopen (NULL, "r", fp) == NULL);
+        ASSERT (errno == EBADF);
+        fclose (fp);
+      }
+  }
+  {
+    FILE *fp;
+    close (99);
+    fp = fdopen (99, "w+");
+    if (fp != NULL)
+      {
+        errno = 0;
+        ASSERT (freopen (NULL, "r", fp) == NULL);
+        ASSERT (errno == EBADF);
+        fclose (fp);
+      }
+  }
+#endif
+
+  /* Clean up.  */
+  unlink (filename);
+
   return 0;
 }