Work around bug with trailing slash on Solaris 9 and HP-UX 11.00.

[gnulib.git] / m4 / fopen.m4

diff --git a/m4/fopen.m4 b/m4/fopen.m4
index 1ec011b..c1bbe88 100644 (file)
--- a/m4/fopen.m4
+++ b/m4/fopen.m4
@@ -1,5 +1,5 @@
-# fopen.m4 serial 1
-dnl Copyright (C) 2007 Free Software Foundation, Inc.
+# fopen.m4 serial 2
+dnl Copyright (C) 2007-2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -13,5 +13,38 @@ AC_DEFUN([gl_FUNC_FOPEN],
       REPLACE_FOPEN=1
       AC_LIBOBJ([fopen])
       ;;
+    *)
+      dnl fopen("foo/", "w") should not create a file when the file name has a
+      dnl trailing slash.
+      AC_CACHE_CHECK([whether fopen recognizes a trailing slash],
+        [gl_cv_func_fopen_slash],
+        [
+          AC_TRY_RUN([
+#include <stddef.h>
+#include <stdio.h>
+int main ()
+{
+  return fopen ("conftest.sl/", "w") != NULL;
+}], [gl_cv_func_fopen_slash=yes], [gl_cv_func_fopen_slash=no],
+            [
+changequote(,)dnl
+             case "$host_os" in
+               solaris2.[0-9]*) gl_cv_func_fopen_slash="guessing no" ;;
+               hpux*)           gl_cv_func_fopen_slash="guessing no" ;;
+               *)               gl_cv_func_fopen_slash="guessing yes" ;;
+             esac
+changequote([,])dnl
+            ])
+          rm -f conftest.sl
+        ])
+      case "$gl_cv_func_fopen_slash" in
+        *no)
+          AC_DEFINE([FOPEN_TRAILING_SLASH_BUG], 1,
+            [Define to 1 if fopen() fails to recognize a trailing slash.])
+          REPLACE_FOPEN=1
+          AC_LIBOBJ([fopen])
+          ;;
+      esac
+      ;;
   esac
 ])