archive.c File Reference

Archive images. More...

#include <string.h>
#include <errno.h>
#include <ipxe/image.h>

Go to the source code of this file.

Functions
	FILE_LICENCE (GPL2_OR_LATER_OR_UBDL)
int	image_extract (struct image *image, const char *name, struct image **extracted)
	Extract archive image. More...
int	image_extract_exec (struct image *image)
	Extract and execute image. More...
	REQUIRING_SYMBOL (image_extract)
	REQUIRE_OBJECT (config_archive)

Detailed Description

Archive images.

Definition in file archive.c.

Function Documentation

FILE_LICENCE()

FILE_LICENCE

(

GPL2_OR_LATER_OR_UBDL

)

image_extract()

int image_extract	(	struct image *	image,
		const char *	name,
		struct image **	extracted
	)

Extract archive image.

Parameters

image	Image
name	Extracted image name
extracted	Extracted image to fill in

Return values

rc	Return status code

Definition at line 44 of file archive.c.

                                               {
        char *dot;
        int rc;

        /* Check that this image can be used to extract an archive image */
        if ( ! ( image->type && image->type->extract ) ) {
                rc = -ENOTSUP;
                goto err_unsupported;
        }

        /* Allocate new image */
        *extracted = alloc_image ( image->uri );
        if ( ! *extracted ) {
                rc = -ENOMEM;
                goto err_alloc;
        }

        /* Set image name */
        if ( ( rc = image_set_name ( *extracted,
                                     ( name ? name : image->name ) ) ) != 0 ) {
                goto err_set_name;
        }

        /* Strip any archive or compression suffix from implicit name */
        if ( ( ! name ) && ( (*extracted)->name ) &&
             ( ( dot = strrchr ( (*extracted)->name, '.' ) ) != NULL ) ) {
                *dot = '\0';
        }

        /* Try extracting archive image */
        if ( ( rc = image->type->extract ( image, *extracted ) ) != 0 ) {
                DBGC ( image, "IMAGE %s could not extract image: %s\n",
                       image->name, strerror ( rc ) );
                goto err_extract;
        }

        /* Register image */
        if ( ( rc = register_image ( *extracted ) ) != 0 )
                goto err_register;

        /* Propagate trust flag */
        if ( image->flags & IMAGE_TRUSTED )
                image_trust ( *extracted );

        /* Drop local reference to image */
        image_put ( *extracted );

        return 0;

        unregister_image ( *extracted );
 err_register:
 err_extract:
 err_set_name:
        image_put ( *extracted );
 err_alloc:
 err_unsupported:
        return rc;
}

References alloc_image(), DBGC, ENOMEM, ENOTSUP, image_type::extract, image::flags, image_put(), image_set_name(), image_trust(), IMAGE_TRUSTED, image::name, name, NULL, rc, register_image(), strerror(), strrchr(), image::type, unregister_image(), and image::uri.

Referenced by gzip_okx(), image_extract_exec(), imgextract(), and zlib_okx().

image_extract_exec()

int image_extract_exec

(

struct image *

image

)

Extract and execute image.

Parameters

image

Image

Return values

rc	Return status code

Definition at line 110 of file archive.c.

                                               {
        struct image *extracted;
        int rc;

        /* Extract image */
        if ( ( rc = image_extract ( image, NULL, &extracted ) ) != 0 )
                goto err_extract;

        /* Set image command line */
        if ( ( rc = image_set_cmdline ( extracted, image->cmdline ) ) != 0 )
                goto err_set_cmdline;

        /* Set auto-unregister flag */
        extracted->flags |= IMAGE_AUTO_UNREGISTER;

        /* Tail-recurse into extracted image */
        return image_exec ( extracted );

 err_set_cmdline:
        unregister_image ( extracted );
 err_extract:
        return rc;
}

References image::cmdline, image::flags, IMAGE_AUTO_UNREGISTER, image_exec(), image_extract(), image_set_cmdline(), NULL, rc, and unregister_image().

REQUIRING_SYMBOL()

REQUIRING_SYMBOL

(

image_extract

)

REQUIRE_OBJECT()

REQUIRE_OBJECT

(

config_archive

)