/*

cntl.c - implementation of the elf_cntl(3) function.

Copyright (C) 1995 - 1998 Michael Riepe

This library is free software; you can redistribute it and/or

modify it under the terms of the GNU Library General Public

License as published by the Free Software Foundation; either

version 2 of the License, or (at your option) any later version.

This library 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

Library General Public License for more details.

You should have received a copy of the GNU Library General Public

License along with this library; if not, write to the Free Software

Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

*/

#include <private.h>

#ifndef lint

static const char rcsid[] = "@(#) $Id: cntl.c,v 1.6 2005/05/21 15:39:21 michael Exp $";

#endif /* lint */

int

elf_cntl(Elf *elf, Elf_Cmd cmd) {

    Elf_Scn *scn;

    Elf *child;

    if (!elf) {

	return -1;

    }

    elf_assert(elf->e_magic == ELF_MAGIC);

    if (cmd == ELF_C_FDREAD) {

	if (!elf->e_readable) {

	    seterr(ERROR_WRONLY);

	    return -1;

	}

    }

    else if (cmd != ELF_C_FDDONE) {

	seterr(ERROR_INVALID_CMD);

	return -1;

    }

    if (elf->e_disabled) {

	return 0;

    }

    if (elf->e_kind == ELF_K_AR) {

	for (child = elf->e_members; child; child = child->e_link) {

	    elf_assert(elf == child->e_parent);

	    if (elf_cntl(child, cmd)) {

		return -1;

	    }

	}

    }

    else if (elf->e_kind == ELF_K_ELF && cmd == ELF_C_FDREAD) {

	if (!elf->e_ehdr && !_elf_cook(elf)) {

	    return -1;

	}

	for (scn = elf->e_scn_1; scn; scn = scn->s_link) {

	    if (scn->s_index == SHN_UNDEF || scn->s_type == SHT_NULL) {

		continue;

	    }

	    else if (!elf_getdata(scn, NULL)) {

		return -1;

	    }

	}

    }

    elf->e_disabled = 1;

    return 0;

}