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82 lines
1.9 KiB
C
82 lines
1.9 KiB
C
/* Control an ELF file desrciptor.
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Copyright (C) 1998, 1999, 2000, 2002, 2015 Red Hat, Inc.
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This file is part of elfutils.
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Written by Ulrich Drepper <drepper@redhat.com>, 1998.
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This file is free software; you can redistribute it and/or modify
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it under the terms of either
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* the GNU Lesser General Public License as published by the Free
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Software Foundation; either version 3 of the License, or (at
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your option) any later version
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or
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* the GNU General Public License as published by the Free
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Software Foundation; either version 2 of the License, or (at
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your option) any later version
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or both in parallel, as here.
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elfutils is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received copies of the GNU General Public License and
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the GNU Lesser General Public License along with this program. If
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not, see <http://www.gnu.org/licenses/>. */
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <unistd.h>
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#include "libelfP.h"
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int
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elf_cntl (Elf *elf, Elf_Cmd cmd)
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{
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int result = 0;
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if (elf == NULL)
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return -1;
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if (elf->fildes == -1)
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{
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__libelf_seterrno (ELF_E_INVALID_HANDLE);
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return -1;
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}
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rwlock_wrlock (elf->lock);
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switch (cmd)
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{
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case ELF_C_FDREAD:
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/* If not all of the file is in the memory read it now. */
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if (elf->map_address == NULL && __libelf_readall (elf) == NULL)
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{
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/* We were not able to read everything. */
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result = -1;
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break;
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}
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/* FALLTHROUGH */
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case ELF_C_FDDONE:
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/* Mark the file descriptor as not usable. */
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elf->fildes = -1;
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break;
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default:
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__libelf_seterrno (ELF_E_INVALID_CMD);
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result = -1;
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break;
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}
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rwlock_unlock (elf->lock);
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return result;
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}
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