mirror of https://github.com/ipxe/ipxe.git
136 lines
3.3 KiB
C
136 lines
3.3 KiB
C
/*
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* Copyright (C) 2021 Michael Brown <mbrown@fensystems.co.uk>.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or any later version.
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*
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* This program 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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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301, USA.
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*
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* You can also choose to distribute this program under the terms of
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* the Unmodified Binary Distribution Licence (as given in the file
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* COPYING.UBDL), provided that you have satisfied its requirements.
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*/
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FILE_LICENCE ( GPL2_OR_LATER_OR_UBDL );
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#include <string.h>
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#include <errno.h>
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#include <ipxe/image.h>
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/** @file
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*
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* Archive images
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*
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*/
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/**
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* Extract archive image
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*
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* @v image Image
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* @v name Extracted image name
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* @v extracted Extracted image to fill in
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* @ret rc Return status code
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*/
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int image_extract ( struct image *image, const char *name,
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struct image **extracted ) {
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int rc;
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/* Check that this image can be used to extract an archive image */
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if ( ! ( image->type && image->type->extract ) ) {
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rc = -ENOTSUP;
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goto err_unsupported;
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}
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/* Allocate new image */
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*extracted = alloc_image ( image->uri );
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if ( ! *extracted ) {
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rc = -ENOMEM;
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goto err_alloc;
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}
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/* Set image name */
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if ( ( rc = image_set_name ( *extracted,
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( name ? name : image->name ) ) ) != 0 ) {
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goto err_set_name;
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}
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/* Strip any archive or compression suffix from implicit name */
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if ( ! name )
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image_strip_suffix ( *extracted );
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/* Try extracting archive image */
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if ( ( rc = image->type->extract ( image, *extracted ) ) != 0 ) {
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DBGC ( image, "IMAGE %s could not extract image: %s\n",
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image->name, strerror ( rc ) );
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goto err_extract;
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}
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/* Register image */
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if ( ( rc = register_image ( *extracted ) ) != 0 )
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goto err_register;
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/* Propagate trust flag */
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if ( image->flags & IMAGE_TRUSTED )
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image_trust ( *extracted );
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/* Drop local reference to image */
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image_put ( *extracted );
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return 0;
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unregister_image ( *extracted );
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err_register:
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err_extract:
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err_set_name:
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image_put ( *extracted );
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err_alloc:
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err_unsupported:
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return rc;
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}
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/**
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* Extract and execute image
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*
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* @v image Image
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* @ret rc Return status code
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*/
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int image_extract_exec ( struct image *image ) {
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struct image *extracted;
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int rc;
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/* Extract image */
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if ( ( rc = image_extract ( image, NULL, &extracted ) ) != 0 )
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goto err_extract;
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/* Set image command line */
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if ( ( rc = image_set_cmdline ( extracted, image->cmdline ) ) != 0 )
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goto err_set_cmdline;
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/* Set auto-unregister flag */
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extracted->flags |= IMAGE_AUTO_UNREGISTER;
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/* Tail-recurse into extracted image */
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return image_exec ( extracted );
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err_set_cmdline:
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unregister_image ( extracted );
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err_extract:
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return rc;
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}
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/* Drag in objects via image_extract() */
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REQUIRING_SYMBOL ( image_extract );
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/* Drag in archive image formats */
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REQUIRE_OBJECT ( config_archive );
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