upload sdk

git-svn-id: svn://kolibrios.org@4349 a494cfbc-eb01-0410-851d-a64ba20cac60

contrib/sdk/sources/newlib/stdio/fileno.c

@@ -0,0 +1,62 @@
+/*
+ * Copyright (c) 1990 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms are permitted
+ * provided that the above copyright notice and this paragraph are
+ * duplicated in all such forms and that any documentation,
+ * advertising materials, and other materials related to such
+ * distribution and use acknowledge that the software was developed
+ * by the University of California, Berkeley.  The name of the
+ * University may not be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
+ * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
+ */
+
+/*
+FUNCTION
+<<fileno>>---return file descriptor associated with stream
+
+INDEX
+	fileno
+
+ANSI_SYNOPSIS
+	#include <stdio.h>
+	int fileno(FILE *<[fp]>);
+
+TRAD_SYNOPSIS
+	#include <stdio.h>
+	int fileno(<[fp]>)
+	FILE *<[fp]>;
+
+DESCRIPTION
+You can use <<fileno>> to return the file descriptor identified by <[fp]>.
+
+RETURNS
+<<fileno>> returns a non-negative integer when successful.
+If <[fp]> is not an open stream, <<fileno>> returns -1.
+
+PORTABILITY
+<<fileno>> is not part of ANSI C.
+POSIX requires <<fileno>>.
+
+Supporting OS subroutines required: none.
+*/
+
+#include <_ansi.h>
+#include <stdio.h>
+#include "local.h"
+
+int
+_DEFUN(fileno, (f),
+       FILE * f)
+{
+  int result;
+  CHECK_INIT (_REENT, f);
+  _flockfile (f);
+  result = __sfileno (f);
+  _funlockfile (f);
+  return result;
+}