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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.17.0/] [newlib/] [libc/] [stdio/] [fileno.c] - Rev 179
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/* * 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; }
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