1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License (the "License").
6 * You may not use this file except in compliance with the License.
7 *
8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9 * or http://www.opensolaris.org/os/licensing.
10 * See the License for the specific language governing permissions
11 * and limitations under the License.
12 *
13 * When distributing Covered Code, include this CDDL HEADER in each
14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15 * If applicable, add the following below this CDDL HEADER, with the
16 * fields enclosed by brackets "[]" replaced with your own identifying
17 * information: Portions Copyright [yyyy] [name of copyright owner]
18 *
19 * CDDL HEADER END
20 */
21
22/*
23 * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24 * Use is subject to license terms.
25 */
26
27/*	Copyright (c) 1988 AT&T	*/
28/*	  All Rights Reserved  	*/
29
30#pragma ident	"@(#)cntl.c	1.11	08/05/31 SMI"
31
32#include "libelf.h"
33#include "decl.h"
34#include "msg.h"
35
36int
37elf_cntl(Elf * elf, Elf_Cmd cmd)
38{
39
40	if (elf == 0)
41		return (0);
42	ELFWLOCK(elf);
43	switch (cmd) {
44	case ELF_C_FDREAD:
45	{
46		int	j = 0;
47
48		if ((elf->ed_myflags & EDF_READ) == 0) {
49			_elf_seterr(EREQ_CNTLWRT, 0);
50			ELFUNLOCK(elf);
51			return (-1);
52		}
53		if ((elf->ed_status != ES_FROZEN) &&
54		    ((_elf_cook(elf) != OK_YES) ||
55		    (_elf_vm(elf, (size_t)0, elf->ed_fsz) != OK_YES)))
56			j = -1;
57		elf->ed_fd = -1;
58		ELFUNLOCK(elf);
59		return (j);
60	}
61
62	case ELF_C_FDDONE:
63		if ((elf->ed_myflags & EDF_READ) == 0) {
64			_elf_seterr(EREQ_CNTLWRT, 0);
65			ELFUNLOCK(elf);
66			return (-1);
67		}
68		elf->ed_fd = -1;
69		ELFUNLOCK(elf);
70		return (0);
71
72	default:
73		_elf_seterr(EREQ_CNTLCMD, 0);
74		break;
75	}
76	ELFUNLOCK(elf);
77	return (-1);
78}
79