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/* Control an ELF file desrciptor.
Copyright (C) 1998, 1999, 2000, 2002 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 1998.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <unistd.h>
#include "libelfP.h"
int
elf_cntl (Elf *elf, Elf_Cmd cmd)
{
int result = 0;
if (elf == NULL)
return -1;
if (elf->fildes == -1)
{
__libelf_seterrno (ELF_E_INVALID_HANDLE);
return -1;
}
rwlock_wrlock (elf->lock);
switch (cmd)
{
case ELF_C_FDREAD:
/* If not all of the file is in the memory read it now. */
if (elf->map_address == NULL && __libelf_readall (elf) == NULL)
{
/* We were not able to read everything. */
result = -1;
break;
}
/* FALLTHROUGH */
case ELF_C_FDDONE:
/* Mark the file descriptor as not usable. */
elf->fildes = -1;
break;
default:
__libelf_seterrno (ELF_E_INVALID_CMD);
result = -1;
break;
}
rwlock_unlock (elf->lock);
return result;
}
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