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author | Sascha Hauer <s.hauer@pengutronix.de> | 2011-11-25 18:49:14 +0100 |
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committer | Sascha Hauer <s.hauer@pengutronix.de> | 2011-11-29 21:12:42 +0100 |
commit | b6996039f622ccc8488176e211bf41315f9691c6 (patch) | |
tree | 8eb8573833d98fe93b8db036acdf677fd74a30f6 /common | |
parent | 32daa5509a68f58fe365fadafdb5b1ec5d72fff5 (diff) | |
download | barebox-b6996039f622ccc8488176e211bf41315f9691c6.tar.gz barebox-b6996039f622ccc8488176e211bf41315f9691c6.tar.xz |
add file detection support
Several filetypes can be autodetected. Barebox could make use
of this in several ways:
- Add a command to detect filetypes
- detect arm zImages and uImages to unify the different boot commands
- maybe detect UBI or JFFS2 images to construct parts of the kernel
command line
- select correct uncompression function based on filetype
This patch adds basic support to detect filetypes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'common')
-rw-r--r-- | common/Makefile | 1 | ||||
-rw-r--r-- | common/filetype.c | 99 |
2 files changed, 100 insertions, 0 deletions
diff --git a/common/Makefile b/common/Makefile index 3edf38f3ba..55d9dbcb43 100644 --- a/common/Makefile +++ b/common/Makefile @@ -26,6 +26,7 @@ obj-$(CONFIG_CMD_BOOTM) += image.o obj-y += startup.o obj-y += misc.o obj-y += memsize.o +obj-y += filetype.o obj-$(CONFIG_MENU) += menu.o obj-$(CONFIG_PASSWORD) += password.o obj-$(CONFIG_MODULES) += module.o diff --git a/common/filetype.c b/common/filetype.c new file mode 100644 index 0000000000..5635d40af0 --- /dev/null +++ b/common/filetype.c @@ -0,0 +1,99 @@ +/* + * filetype.c - detect filetypes + * + * Copyright (c) 2011 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix + * + * See file CREDITS for list of people who contributed to this + * project. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 + * as published by the Free Software Foundation. + * + * This program 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 General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation. + */ +#include <common.h> +#include <filetype.h> +#include <asm/byteorder.h> +#include <fcntl.h> +#include <fs.h> +#include <malloc.h> + +static const char *filetype_str[] = { + [filetype_unknown] = "unknown", + [filetype_arm_zimage] = "arm Linux zImage", + [filetype_lzo_compressed] = "lzo compressed", + [filetype_arm_barebox] = "arm barebox image", + [filetype_uimage] = "U-Boot uImage", + [filetype_ubi] = "UBI image", + [filetype_jffs2] = "JFFS2 image", + [filetype_gzip] = "gzip compressed", + [filetype_bzip2] = "bzip2 compressed", +}; + +const char *file_type_to_string(enum filetype f) +{ + if (f < ARRAY_SIZE(filetype_str)) + return filetype_str[f]; + + return NULL; +} + +enum filetype file_detect_type(void *_buf) +{ + u32 *buf = _buf; + u8 *buf8 = _buf; + + if (buf[8] == 0x65726162 && buf[9] == 0x00786f62) + return filetype_arm_barebox; + if (buf[9] == 0x016f2818 || buf[9] == 0x18286f01) + return filetype_arm_zimage; + if (buf8[0] == 0x89 && buf8[1] == 0x4c && buf8[2] == 0x5a && + buf8[3] == 0x4f) + return filetype_lzo_compressed; + if (buf[0] == be32_to_cpu(0x27051956)) + return filetype_uimage; + if (buf[0] == 0x23494255) + return filetype_ubi; + if (buf[0] == 0x20031985) + return filetype_jffs2; + if (buf8[0] == 0x1f && buf8[1] == 0x8b && buf8[2] == 0x08) + return filetype_gzip; + if (buf8[0] == 'B' && buf8[1] == 'Z' && buf8[2] == 'h' && + buf8[3] > '0' && buf8[3] <= '9') + return filetype_bzip2; + + return filetype_unknown; +} + +enum filetype file_name_detect_type(const char *filename) +{ + int fd, ret; + void *buf; + enum filetype type = filetype_unknown; + + fd = open(filename, O_RDONLY); + if (fd < 0) + return fd; + + buf = xmalloc(512); + + ret = read(fd, buf, 512); + if (ret != 512) + goto err_out; + + type = file_detect_type(buf); + +err_out: + close(fd); + free(buf); + + return type; +} |