From: Ulrich Drepper <drepper@redhat.com>
Date: Thu, 8 Jul 1999 11:55:34 +0000 (+0000)
Subject: Return -1 instead of EOF and set errno if the stream is not a real file stream.
X-Git-Tag: cvs/glibc_2-1-2~316
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=cb22d4a460cf9261f3e3f26750ce5f8520ba9680;p=thirdparty%2Fglibc.git

Return -1 instead of EOF and set errno if the stream is not a real file stream.
---

diff --git a/libio/fileno.c b/libio/fileno.c
index 7ff93e6a813..92334f15642 100644
--- a/libio/fileno.c
+++ b/libio/fileno.c
@@ -32,8 +32,11 @@ fileno (fp)
 {
   CHECK_FILE (fp, EOF);
 
-  if (!(fp->_flags & _IO_IS_FILEBUF))
-    return EOF;
+  if (!(fp->_flags & _IO_IS_FILEBUF) || _IO_fileno (fp) < 0)
+    {
+      __set_errno (EBADF);
+      return -1;
+    }
 
   return _IO_fileno (fp);
 }