usr/src/cmd/sgs/libelf/common/cntl.c

   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   "%Z%%M% %I%     %E% SMI"
  31
  32 #include "libelf.h"
  33 #include "decl.h"
  34 #include "msg.h"
  35
  36 int
  37 elf_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 }