xref: /freebsd/lib/libc/stdio/fileno.c (revision c17bf9a9a5a3b59e03108b785f6b15070ff25651)
158f0484fSRodney W. Grimes /*-
258f0484fSRodney W. Grimes  * Copyright (c) 1990, 1993
358f0484fSRodney W. Grimes  *	The Regents of the University of California.  All rights reserved.
458f0484fSRodney W. Grimes  *
558f0484fSRodney W. Grimes  * This code is derived from software contributed to Berkeley by
658f0484fSRodney W. Grimes  * Chris Torek.
758f0484fSRodney W. Grimes  *
858f0484fSRodney W. Grimes  * Redistribution and use in source and binary forms, with or without
958f0484fSRodney W. Grimes  * modification, are permitted provided that the following conditions
1058f0484fSRodney W. Grimes  * are met:
1158f0484fSRodney W. Grimes  * 1. Redistributions of source code must retain the above copyright
1258f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer.
1358f0484fSRodney W. Grimes  * 2. Redistributions in binary form must reproduce the above copyright
1458f0484fSRodney W. Grimes  *    notice, this list of conditions and the following disclaimer in the
1558f0484fSRodney W. Grimes  *    documentation and/or other materials provided with the distribution.
1658f0484fSRodney W. Grimes  * 4. Neither the name of the University nor the names of its contributors
1758f0484fSRodney W. Grimes  *    may be used to endorse or promote products derived from this software
1858f0484fSRodney W. Grimes  *    without specific prior written permission.
1958f0484fSRodney W. Grimes  *
2058f0484fSRodney W. Grimes  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2158f0484fSRodney W. Grimes  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2258f0484fSRodney W. Grimes  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2358f0484fSRodney W. Grimes  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2458f0484fSRodney W. Grimes  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2558f0484fSRodney W. Grimes  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2658f0484fSRodney W. Grimes  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2758f0484fSRodney W. Grimes  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
2858f0484fSRodney W. Grimes  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
2958f0484fSRodney W. Grimes  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3058f0484fSRodney W. Grimes  * SUCH DAMAGE.
3158f0484fSRodney W. Grimes  */
3258f0484fSRodney W. Grimes 
3358f0484fSRodney W. Grimes #if defined(LIBC_SCCS) && !defined(lint)
3458f0484fSRodney W. Grimes static char sccsid[] = "@(#)fileno.c	8.1 (Berkeley) 6/4/93";
3558f0484fSRodney W. Grimes #endif /* LIBC_SCCS and not lint */
36333fc21eSDavid E. O'Brien #include <sys/cdefs.h>
37333fc21eSDavid E. O'Brien __FBSDID("$FreeBSD$");
3858f0484fSRodney W. Grimes 
392c19171bSTim J. Robbins #include "namespace.h"
4058f0484fSRodney W. Grimes #include <stdio.h>
412c19171bSTim J. Robbins #include "un-namespace.h"
42c17bf9a9SJohn Baldwin #include "local.h"
432c19171bSTim J. Robbins #include "libc_private.h"
4458f0484fSRodney W. Grimes 
45c17bf9a9SJohn Baldwin #define	__sfileno(p)	((p)->_file)
46567d74a5STim J. Robbins 
47ce51cf03SJames Raynard int
4829ac6bd2SDaniel Eischen fileno(FILE *fp)
4958f0484fSRodney W. Grimes {
502c19171bSTim J. Robbins 	int fd;
512c19171bSTim J. Robbins 
522c19171bSTim J. Robbins 	FLOCKFILE(fp);
532c19171bSTim J. Robbins 	fd = __sfileno(fp);
542c19171bSTim J. Robbins 	FUNLOCKFILE(fp);
552c19171bSTim J. Robbins 
562c19171bSTim J. Robbins 	return (fd);
5758f0484fSRodney W. Grimes }
58c17bf9a9SJohn Baldwin 
59c17bf9a9SJohn Baldwin int
60c17bf9a9SJohn Baldwin fileno_unlocked(FILE *fp)
61c17bf9a9SJohn Baldwin {
62c17bf9a9SJohn Baldwin 
63c17bf9a9SJohn Baldwin 	return (__sfileno(fp));
64c17bf9a9SJohn Baldwin }
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