1/*	$NetBSD: elf_cntl.c,v 1.5 2024/03/03 17:37:33 christos Exp $	*/
2
3/*-
4 * Copyright (c) 2006,2008 Joseph Koshy
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26 * SUCH DAMAGE.
27 */
28
29#include <sys/cdefs.h>
30
31#include <libelf.h>
32
33#include "_libelf.h"
34
35__RCSID("$NetBSD: elf_cntl.c,v 1.5 2024/03/03 17:37:33 christos Exp $");
36ELFTC_VCSID("Id: elf_cntl.c 3977 2022-05-01 06:45:34Z jkoshy");
37
38int
39elf_cntl(Elf *e, Elf_Cmd c)
40{
41	if (e == NULL ||
42	    (c != ELF_C_FDDONE && c != ELF_C_FDREAD)) {
43		LIBELF_SET_ERROR(ARGUMENT, 0);
44		return (-1);
45	}
46
47	if (e->e_parent) {
48		LIBELF_SET_ERROR(ARCHIVE, 0);
49		return (-1);
50	}
51
52	if (c == ELF_C_FDREAD) {
53		if (e->e_cmd == ELF_C_WRITE) {
54			LIBELF_SET_ERROR(MODE, 0);
55			return (-1);
56		}
57		else
58			return (0);
59	}
60
61	e->e_fd = -1;
62	return 0;
63}
64