X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=tests%2Ftest-posix_spawn_file_actions_adddup2.c;h=347e78328773c8554deadfd49cda6dc7b28f1a22;hb=1276a2c5f24c0c932426aca9c899fa524d2443f2;hp=d728eff61c595fe04368e5830f9a13526ba85868;hpb=f8a3550c9b4cea9cccb72d9ba09fce1aebd1a146;p=gnulib.git

diff --git a/tests/test-posix_spawn_file_actions_adddup2.c b/tests/test-posix_spawn_file_actions_adddup2.c
index d728eff61..347e78328 100644
--- a/tests/test-posix_spawn_file_actions_adddup2.c
+++ b/tests/test-posix_spawn_file_actions_adddup2.c
@@ -1,5 +1,5 @@
 /* Test posix_spawn_file_actions_adddup2() function.
-   Copyright (C) 2011-2013 Free Software Foundation, Inc.
+   Copyright (C) 2011-2014 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
@@ -23,14 +23,29 @@ SIGNATURE_CHECK (posix_spawn_file_actions_adddup2, int,
                  (posix_spawn_file_actions_t *, int, int));
 
 #include <errno.h>
+#include <limits.h>
 #include <unistd.h>
 
 #include "macros.h"
 
+/* Return a file descriptor that is too big to use.
+   Prefer the smallest such fd, except use OPEN_MAX if it is defined
+   and is greater than getdtablesize (), as that's how OS X works.  */
+static int
+big_fd (void)
+{
+  int fd = getdtablesize ();
+#ifdef OPEN_MAX
+  if (fd < OPEN_MAX)
+    fd = OPEN_MAX;
+#endif
+  return fd;
+}
+
 int
 main (void)
 {
-  int bad_fd = getdtablesize ();
+  int bad_fd = big_fd ();
   posix_spawn_file_actions_t actions;
 
   ASSERT (posix_spawn_file_actions_init (&actions) == 0);