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![Guilherme Maciel Ferreira](/assets/img/avatar_default.png)
Given a multi-file image created through the mkimage's -d option: $ mkimage -A x86 -O linux -T multi -n x86 -d vmlinuz:initrd.img:System.map \ multi.img Image Name: x86 Created: Thu Jul 25 10:29:13 2013 Image Type: Intel x86 Linux Multi-File Image (gzip compressed) Data Size: 13722956 Bytes = 13401.32 kB = 13.09 MB Load Address: 00000000 Entry Point: 00000000 Contents: Image 0: 4040128 Bytes = 3945.44 kB = 3.85 MB Image 1: 7991719 Bytes = 7804.41 kB = 7.62 MB Image 2: 1691092 Bytes = 1651.46 kB = 1.61 MB It is possible to perform the innverse operation -- extracting any file from the image -- by using the dumpimage's -i option: $ dumpimage -i multi.img -p 2 System.map Although it's feasible to retrieve "data files" from image through scripting, the requirement to embed tools such 'dd', 'awk' and 'sed' for this sole purpose is cumbersome and unreliable -- once you must keep track of file sizes inside the image. Furthermore, extracting data files using "dumpimage" tool is faster than through scripting. Signed-off-by: Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com> Signed-off-by: Simon Glass <sjg@chromium.org>
34 lines
628 B
C
34 lines
628 B
C
/*
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* Based on mkimage.c.
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*
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* Written by Guilherme Maciel Ferreira <guilherme.maciel.ferreira@gmail.com>
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#ifndef _DUMPIMAGE_H_
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#define _DUMPIMAGE_H_
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#include "os_support.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <time.h>
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#include <unistd.h>
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#include <sha1.h>
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#include "fdt_host.h"
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#include "imagetool.h"
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#undef DUMPIMAGE_DEBUG
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#ifdef DUMPIMAGE_DEBUG
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#define debug(fmt, args...) printf(fmt, ##args)
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#else
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#define debug(fmt, args...)
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#endif /* DUMPIMAGE_DEBUG */
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#endif /* _DUMPIMAGE_H_ */
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