1 files changed, 145 insertions, 0 deletions
diff --git a/src/dump.c b/src/dump.c
new file mode 100644
index 0000000..ca6842c
--- /dev/null
+++ b/src/dump.c
@@ -0,0 +1,145 @@
+/*
+ * Copyright (C) 2007
+ *       pancake <pancake@youterm.com>
+ *
+ * 0xFFFF is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 0xFFFF 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 0xFFFF; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#include "main.h"
+#include <usb.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+int rf_extract(char *dev, off_t from, off_t to, char *file)
+{
+	off_t i, blk = 0xfffff;
+	char buf[0xfffff];
+	FILE *fs = fopen(dev, "rb");
+	FILE *fd = fopen(file, "wb+");
+
+	if (from>to) {
+		printf("Bad range %lld - %lld for %s\n", from, to, file);
+		goto __rf_extract_exit;
+	}
+	if (fs == NULL) { perror(dev);  goto __rf_extract_exit; }
+	if (fd == NULL) { perror(file); goto __rf_extract_exit; }
+
+	printf("%s: extracting...", file);
+	fflush(stdout);
+	fseek(fs, from, SEEK_SET);
+
+	for(i=from;i<to;i+=blk) {
+		int ret;
+		if (i+blk>to) blk = to-i;
+		ret = fread(buf, blk, 1, fs);
+		if (feof(fs)) break;
+		fwrite(buf, blk, 1, fd);
+	}
+
+	printf("\r%s: %lld bytes dumped from %s\n",
+		file, to-from, dev);
+
+__rf_extract_exit:
+	if (fs) fclose(fs);
+	if (fd) fclose(fd);
+
+
+	return 1;
+}
+
+int rf_strip(char *file)
+{
+	FILE *fd = fopen(file, "rw");
+	unsigned char buf[4096];
+	int ret;
+	off_t eof = 0;
+
+	if (!fd) {
+		fprintf(stderr, "Weird! can't open %s???\n", file);
+		exit(0);
+	}
+	printf("Stripping padding from %s... ", file);
+	fflush(stdout);
+	fseek(fd, 0, SEEK_END);
+
+	do {
+		fseek(fd, -4096, SEEK_CUR);
+		ret = fread(buf, 1, 4096, fd);
+		fseek(fd, -4096, SEEK_CUR);
+		for(ret--;ret>0;ret--)
+			if (buf[ret]!=0xff) {
+				fseek(fd, ret+1, SEEK_CUR);
+				eof = ftell(fd);
+				goto __done;
+			}
+	} while(1);
+
+__done:
+	fclose(fd);
+	if (eof) truncate(file, eof);
+	printf("done at %d\n", (int)eof);
+
+	return 1;
+}
+
+int is_n800()
+{
+	int n800 = 0;
+	unsigned char buf[4];
+	FILE *fd = fopen("/dev/mtd0", "rb");
+
+	if (!fd) {
+		fprintf(stderr, "Cannot open /dev/mtd0.\n");
+		exit(1);
+	}
+	fread(buf, 4, 1,fd);
+	if (!memcmp("\xff\xff\xff\xff", buf, 4))
+		n800 = 1;
+	
+	fclose(fd);
+
+	return n800;
+}
+
+
+int reverse_extract_pieces(char *dir)
+{
+	char reply;
+	chdir(dir);
+
+	rf_extract("/dev/mtd0", is_n800()?0x200:0, 0x003600, "xloader.bin");
+	rf_extract("/dev/mtd0", 0x004000, 0x01ffff,  "secondary.bin");
+	rf_extract("/dev/mtd2", 0x000800, 0x200000,  "zImage");
+	rf_extract("/dev/mtd3", 0x000000, 0x1D00000, "initfs.jffs2");
+	printf("\nWARNING: the rootfs extraction on n800 is known to be buggy! feedback is welcome.\n\n");
+	printf("Extract rootfs? (Y/n): "); fflush(stdout);
+	read(0, &reply, 1);
+	if (reply=='y'||reply=='Y')
+		rf_extract("/dev/mtd4", 0x000000, 0xffffff, "rootfs.jffs2");
+	else	printf("*** Ignoring rootfs\n");
+	rf_strip("xloader.bin");
+	rf_strip("secondary.bin");
+	rf_strip("zImage");
+	rf_strip("initfs.jffs2");
+	printf("Identifying extracted files...\n");
+	printf("%s: xloader\n", fpid_file("xloader.bin"));
+	printf("%s: secondary.bin\n", fpid_file("secondary.bin"));
+	printf("%s: zImage\n", fpid_file("zImage"));
+	printf("%s: initfs.jffs2\n", fpid_file("initfs.jffs2"));
+
+	return 1;
+}