dup2, dup3: work around another cygwin crasher

[gnulib.git] / tests / test-dup2.c

diff --git a/tests/test-dup2.c b/tests/test-dup2.c
index 5043c0c..44039f1 100644 (file)
--- a/tests/test-dup2.c
+++ b/tests/test-dup2.c
@@ -1,5 +1,5 @@
 /* Test duplicating file descriptors.
-   Copyright (C) 2009-2012 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
@@ -26,6 +26,10 @@ SIGNATURE_CHECK (dup2, int, (int, int));
 #include <errno.h>
 #include <fcntl.h>
 
+#if HAVE_SYS_RESOURCE_H
+# include <sys/resource.h>
+#endif
+
 #include "binary-io.h"
 
 #if GNULIB_TEST_CLOEXEC
@@ -103,6 +107,7 @@ main (void)
 {
   const char *file = "test-dup2.tmp";
   char buffer[1];
+  int bad_fd = getdtablesize ();
   int fd = open (file, O_CREAT | O_TRUNC | O_RDWR, 0600);
 
   /* Assume std descriptors were provided by invoker.  */
@@ -122,6 +127,7 @@ main (void)
   errno = 0;
   ASSERT (dup2 (-1, fd) == -1);
   ASSERT (errno == EBADF);
+  close (99);
   errno = 0;
   ASSERT (dup2 (99, fd) == -1);
   ASSERT (errno == EBADF);
@@ -144,8 +150,17 @@ main (void)
   errno = 0;
   ASSERT (dup2 (fd, -2) == -1);
   ASSERT (errno == EBADF);
+  if (bad_fd > 256)
+    {
+      ASSERT (dup2 (fd, 255) == 255);
+      ASSERT (dup2 (fd, 256) == 256);
+      ASSERT (close (255) == 0);
+      ASSERT (close (256) == 0);
+    }
+  ASSERT (dup2 (fd, bad_fd - 1) == bad_fd - 1);
+  ASSERT (close (bad_fd - 1) == 0);
   errno = 0;
-  ASSERT (dup2 (fd, 10000000) == -1);
+  ASSERT (dup2 (fd, bad_fd) == -1);
   ASSERT (errno == EBADF);
 
   /* Using dup2 can skip fds.  */