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authorSascha Hauer <s.hauer@pengutronix.de>2011-11-25 18:49:14 +0100
committerSascha Hauer <s.hauer@pengutronix.de>2011-11-29 21:12:42 +0100
commitb6996039f622ccc8488176e211bf41315f9691c6 (patch)
tree8eb8573833d98fe93b8db036acdf677fd74a30f6 /common/filetype.c
parent32daa5509a68f58fe365fadafdb5b1ec5d72fff5 (diff)
downloadbarebox-b6996039f622ccc8488176e211bf41315f9691c6.tar.gz
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/filetype.c')
-rw-r--r--common/filetype.c99
1 files changed, 99 insertions, 0 deletions
diff --git a/common/filetype.c b/common/filetype.c
new file mode 100644
index 0000000..5635d40
--- /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;
+}