103 lines
2.6 KiB
C
103 lines
2.6 KiB
C
/*
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* filetype.c - detect filetypes
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*
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* Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU 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.
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*/
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#include <common.h>
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#include <filetype.h>
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#include <asm/byteorder.h>
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#include <fcntl.h>
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#include <fs.h>
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#include <malloc.h>
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static const char *filetype_str[] = {
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[filetype_unknown] = "unknown",
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[filetype_arm_zimage] = "arm Linux zImage",
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[filetype_lzo_compressed] = "lzo compressed",
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[filetype_arm_barebox] = "arm barebox image",
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[filetype_uimage] = "U-Boot uImage",
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[filetype_ubi] = "UBI image",
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[filetype_jffs2] = "JFFS2 image",
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[filetype_gzip] = "gzip compressed",
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[filetype_bzip2] = "bzip2 compressed",
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[filetype_oftree] = "open firmware flat device tree",
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};
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const char *file_type_to_string(enum filetype f)
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{
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if (f < ARRAY_SIZE(filetype_str))
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return filetype_str[f];
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return NULL;
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}
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enum filetype file_detect_type(void *_buf)
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{
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u32 *buf = _buf;
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u8 *buf8 = _buf;
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if (buf[8] == 0x65726162 && buf[9] == 0x00786f62)
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return filetype_arm_barebox;
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if (buf[9] == 0x016f2818 || buf[9] == 0x18286f01)
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return filetype_arm_zimage;
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if (buf8[0] == 0x89 && buf8[1] == 0x4c && buf8[2] == 0x5a &&
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buf8[3] == 0x4f)
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return filetype_lzo_compressed;
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if (buf[0] == be32_to_cpu(0x27051956))
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return filetype_uimage;
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if (buf[0] == 0x23494255)
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return filetype_ubi;
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if (buf[0] == 0x20031985)
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return filetype_jffs2;
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if (buf8[0] == 0x1f && buf8[1] == 0x8b && buf8[2] == 0x08)
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return filetype_gzip;
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if (buf8[0] == 'B' && buf8[1] == 'Z' && buf8[2] == 'h' &&
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buf8[3] > '0' && buf8[3] <= '9')
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return filetype_bzip2;
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if (buf[0] == be32_to_cpu(0xd00dfeed))
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return filetype_oftree;
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return filetype_unknown;
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}
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enum filetype file_name_detect_type(const char *filename)
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{
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int fd, ret;
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void *buf;
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enum filetype type = filetype_unknown;
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fd = open(filename, O_RDONLY);
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if (fd < 0)
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return fd;
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buf = xmalloc(512);
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ret = read(fd, buf, 512);
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if (ret != 512)
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goto err_out;
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type = file_detect_type(buf);
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err_out:
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close(fd);
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free(buf);
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return type;
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}
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