xref: /src/lib/libc/gen/nlist.c

/*	$NetBSD: nlist.c,v 1.14 1999/09/16 11:45:01 lukem Exp $	*/

/*
 * Copyright (c) 1996 Christopher G. Demetriou.  All rights reserved.
 * Copyright (c) 1989, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/cdefs.h>
#if defined(LIBC_SCCS) && !defined(lint)
#if 0
static char sccsid[] = "@(#)nlist.c	8.1 (Berkeley) 6/4/93";
#else
__RCSID("$NetBSD: nlist.c,v 1.14 1999/09/16 11:45:01 lukem Exp $");
#endif
#endif /* LIBC_SCCS and not lint */

#include "namespace.h"
#include <sys/param.h>
#include <sys/mman.h>
#include <sys/stat.h>
#include <sys/file.h>

#include <assert.h>
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <a.out.h>			/* for 'struct nlist' declaration */

#ifdef __weak_alias
__weak_alias(nlist,_nlist);
#endif

#include "nlist_private.h"

static const struct {
	int	(*fdnlist) __P((int, struct nlist *));
} fdnlist_fmts[] = {
#ifdef NLIST_AOUT
	{	__fdnlist_aout		},
#endif
#ifdef NLIST_ECOFF
	{	__fdnlist_ecoff		},
#endif
#ifdef NLIST_ELF32
	{	__fdnlist_elf32		},
#endif
#ifdef NLIST_ELF64
	{	__fdnlist_elf64		},
#endif
};

int
nlist(name, list)
	const char *name;
	struct nlist *list;
{
	int fd, n;

	_DIAGASSERT(name != NULL);
	_DIAGASSERT(list != NULL);
#ifdef _DIAGNOSTIC
	if (name == NULL || list == NULL) {
		errno = EFAULT;
		return (-1);
	}
#endif

	fd = open(name, O_RDONLY, 0);
	if (fd < 0)
		return (-1);
	n = __fdnlist(fd, list);
	(void)close(fd);
	return (n);
}

int
__fdnlist(fd, list)
	int fd;
	struct nlist *list;
{
	int i, rv;

	_DIAGASSERT(fd != -1);
	_DIAGASSERT(list != NULL);
#ifdef _DIAGNOSTIC
	if (fd == -1) {
		errno = EBADF;
		return (-1);
	}
	if (list == NULL) {
		errno = EFAULT;
		return (-1);
	}
#endif

	for (i = 0; i < sizeof(fdnlist_fmts) / sizeof(fdnlist_fmts[0]); i++)
		if ((rv = (*fdnlist_fmts[i].fdnlist)(fd, list)) != -1)
			return (rv);
	return (-1);
}