-# fdopen.m4 serial 2
-dnl Copyright (C) 2011 Free Software Foundation, Inc.
+# fdopen.m4 serial 3
+dnl Copyright (C) 2011-2013 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.
FILE *fp;
errno = 0;
fp = fdopen (-1, "r");
- if (fp != NULL)
+ if (fp == NULL && errno == 0)
return 1;
- if (errno == 0)
- return 2;
return 0;
}]])],
[gl_cv_func_fdopen_works=yes],