build/mtd-utils/rfddump.c - nest-cam/v366/mtd-utils - Git at Google

 /*
  * rfddump.c
  *
  * Copyright (C) 2005 Sean Young <sean@mess.org>
  *
  *  This program 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.
  */

 #define PROGRAM_NAME "rfddump"
 #define VERSION "$Revision 1.0 $"

 #define _XOPEN_SOURCE 500 /* For pread */

 #include <stdio.h>
 #include <stdlib.h>
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <sys/ioctl.h>
 #include <string.h>
 #include <fcntl.h>
 #include <unistd.h>
 #include <getopt.h>

 #include <mtd/mtd-user.h>
 #include <linux/types.h>
 #include <mtd_swab.h>

 /* next is an array of mapping for each corresponding sector */
 #define RFD_MAGIC		0x9193
 #define HEADER_MAP_OFFSET       3
 #define SECTOR_DELETED          0x0000
 #define SECTOR_ZERO             0xfffe
 #define SECTOR_FREE             0xffff

 #define SECTOR_SIZE             512

 #define SECTORS_PER_TRACK	63


 struct rfd {
 	int block_size;
 	int block_count;
 	int header_sectors;
 	int data_sectors;
 	int header_size;
 	uint16_t *header;
 	int sector_count;
 	int *sector_map;
 	const char *mtd_filename;
 	const char *out_filename;
 	int verbose;
 };

 void display_help(void)
 {
 	printf("Usage: %s [OPTIONS] MTD-device filename\n"
 			"Dumps the contents of a resident flash disk\n"
 			"\n"
 			"-h         --help               display this help and exit\n"
 			"-V         --version            output version information and exit\n"
 			"-v         --verbose		Be verbose\n"
 			"-b size    --blocksize          Block size (defaults to erase unit)\n",
 			PROGRAM_NAME);
 	exit(0);
 }

 void display_version(void)
 {
 	printf("%s " VERSION "\n"
 			"\n"
 			"This is free software; see the source for copying conditions.  There is NO\n"
 			"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
 			PROGRAM_NAME);

 	exit(0);
 }

 void process_options(int argc, char *argv[], struct rfd *rfd)
 {
 	int error = 0;

 	rfd->block_size = 0;
 	rfd->verbose = 0;

 	for (;;) {
 		int option_index = 0;
 		static const char *short_options = "hvVb:";
 		static const struct option long_options[] = {
 			{ "help", no_argument, 0, 'h' },
 			{ "version", no_argument, 0, 'V', },
 			{ "blocksize", required_argument, 0, 'b' },
 			{ "verbose", no_argument, 0, 'v' },
 			{ NULL, 0, 0, 0 }
 		};

 		int c = getopt_long(argc, argv, short_options,
 				long_options, &option_index);
 		if (c == EOF)
 			break;

 		switch (c) {
 			case 'h':
 				display_help();
 				break;
 			case 'V':
 				display_version();
 				break;
 			case 'v':
 				rfd->verbose = 1;
 				break;
 			case 'b':
 				rfd->block_size = atoi(optarg);
 				break;
 			case '?':
 				error = 1;
 				break;
 		}
 	}

 	if ((argc - optind) != 2 || error)
 		display_help();

 	rfd->mtd_filename = argv[optind];
 	rfd->out_filename = argv[optind + 1];
 }

 int build_block_map(struct rfd *rfd, int fd, int block)
 {
 	int  i;
 	int sectors;

 	if (pread(fd, rfd->header, rfd->header_size, block * rfd->block_size)
 			!= rfd->header_size) {
 		return -1;
 	}

 	if (le16_to_cpu(rfd->header[0]) != RFD_MAGIC) {
 		if (rfd->verbose)
 			printf("Block #%02d: Magic missing\n", block);

 		return 0;
 	}

 	sectors =  0;
 	for (i=0; i<rfd->data_sectors; i++) {
 		uint16_t entry = le16_to_cpu(rfd->header[i + HEADER_MAP_OFFSET]);

 		if (entry == SECTOR_FREE || entry == SECTOR_DELETED)
 			continue;

 		if (entry == SECTOR_ZERO)
 			entry = 0;

 		if (entry >= rfd->sector_count) {
 			fprintf(stderr, "%s: warning: sector %d out of range\n",
 					rfd->mtd_filename, entry);
 			continue;
 		}

 		if (rfd->sector_map[entry] != -1) {
 			fprintf(stderr, "%s: warning: more than one entry "
 					"for sector %d\n", rfd->mtd_filename, entry);
 			continue;
 		}

 		rfd->sector_map[entry] = rfd->block_size * block +
 			(i + rfd->header_sectors) * SECTOR_SIZE;
 		sectors++;
 	}

 	if (rfd->verbose)
 		printf("Block #%02d: %d sectors\n", block, sectors);

 	return 1;
 }

 int main(int argc, char *argv[])
 {
 	int fd, sectors_per_block;
 	mtd_info_t mtd_info;
 	struct rfd rfd;
 	int i, blocks_found;
 	int out_fd = 0;
 	uint8_t sector[512];
 	int blank, rc, cylinders;

 	process_options(argc, argv, &rfd);

 	fd = open(rfd.mtd_filename, O_RDONLY);
 	if (fd == -1) {
 		perror(rfd.mtd_filename);
 		return 1;
 	}

 	if (rfd.block_size == 0) {
 		if (ioctl(fd, MEMGETINFO, &mtd_info)) {
 			perror(rfd.mtd_filename);
 			close(fd);
 			return 1;
 		}

 		if (mtd_info.type != MTD_NORFLASH) {
 			fprintf(stderr, "%s: wrong type\n", rfd.mtd_filename);
 			close(fd);
 			return 2;
 		}

 		sectors_per_block = mtd_info.erasesize / SECTOR_SIZE;

 		rfd.block_size = mtd_info.erasesize;
 		rfd.block_count = mtd_info.size / mtd_info.erasesize;
 	} else {
 		struct stat st;

 		if (fstat(fd, &st) == -1) {
 			perror(rfd.mtd_filename);
 			close(fd);
 			return 1;
 		}

 		if (st.st_size % SECTOR_SIZE)
 			fprintf(stderr, "%s: warning: not a multiple of sectors (512 bytes)\n", rfd.mtd_filename);

 		sectors_per_block = rfd.block_size / SECTOR_SIZE;

 		if (st.st_size % rfd.block_size)
 			fprintf(stderr, "%s: warning: not a multiple of block size\n", rfd.mtd_filename);

 		rfd.block_count = st.st_size / rfd.block_size;

 		if (!rfd.block_count) {
 			fprintf(stderr, "%s: not large enough for one block\n", rfd.mtd_filename);
 			close(fd);
 			return 2;
 		}
 	}

 	rfd.header_sectors =
 		((HEADER_MAP_OFFSET + sectors_per_block) *
 		 sizeof(uint16_t) + SECTOR_SIZE - 1) / SECTOR_SIZE;
 	rfd.data_sectors = sectors_per_block - rfd.header_sectors;
 	cylinders = ((rfd.block_count - 1) * rfd.data_sectors - 1)
 		/ SECTORS_PER_TRACK;
 	rfd.sector_count = cylinders * SECTORS_PER_TRACK;
 	rfd.header_size =
 		(HEADER_MAP_OFFSET + rfd.data_sectors) * sizeof(uint16_t);

 	rfd.header = malloc(rfd.header_size);
 	if (!rfd.header) {
 		perror(PROGRAM_NAME);
 		close(fd);
 		return 2;
 	}
 	rfd.sector_map = malloc(rfd.sector_count * sizeof(int));
 	if (!rfd.sector_map) {
 		perror(PROGRAM_NAME);
 		close(fd);
 		free(rfd.sector_map);
 		return 2;
 	}

 	rfd.mtd_filename = rfd.mtd_filename;

 	for (i=0; i<rfd.sector_count; i++)
 		rfd.sector_map[i] = -1;

 	for (blocks_found=i=0; i<rfd.block_count; i++) {
 		rc = build_block_map(&rfd, fd, i);
 		if (rc > 0)
 			blocks_found++;
 		if (rc < 0)
 			goto err;
 	}

 	if (!blocks_found) {
 		fprintf(stderr, "%s: no RFD blocks found\n", rfd.mtd_filename);
 		goto err;
 	}

 	for (i=0; i<rfd.sector_count; i++) {
 		if (rfd.sector_map[i] != -1)
 			break;
 	}

 	if (i == rfd.sector_count) {
 		fprintf(stderr, "%s: no sectors found\n", rfd.mtd_filename);
 		goto err;
 	}

 	out_fd = open(rfd.out_filename, O_WRONLY | O_TRUNC | O_CREAT, 0666);
 	if (out_fd == -1) {
 		perror(rfd.out_filename);
 		goto err;
 	}

 	blank = 0;
 	for (i=0; i<rfd.sector_count; i++) {
 		if (rfd.sector_map[i] == -1) {
 			memset(sector, 0, SECTOR_SIZE);
 			blank++;
 		} else {
 			if (pread(fd, sector, SECTOR_SIZE, rfd.sector_map[i])
 					!= SECTOR_SIZE) {
 				perror(rfd.mtd_filename);
 				goto err;
 			}
 		}

 		if (write(out_fd, sector, SECTOR_SIZE) != SECTOR_SIZE) {
 			perror(rfd.out_filename);
 			goto err;
 		}
 	}

 	if (rfd.verbose)
 		printf("Copied %d sectors (%d blank)\n", rfd.sector_count, blank);

 	close(out_fd);
 	close(fd);
 	free(rfd.header);
 	free(rfd.sector_map);

 	return 0;

 err:
 	if (out_fd)
 		close(out_fd);

 	close(fd);
 	free(rfd.header);
 	free(rfd.sector_map);

 	return 2;
 }
	/*
	* rfddump.c
	*
	* Copyright (C) 2005 Sean Young <sean@mess.org>
	*
	* This program 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.
	*/

	#define PROGRAM_NAME "rfddump"
	#define VERSION "$Revision 1.0 $"

	#define _XOPEN_SOURCE 500 /* For pread */

	#include <stdio.h>
	#include <stdlib.h>
	#include <sys/types.h>
	#include <sys/stat.h>
	#include <sys/ioctl.h>
	#include <string.h>
	#include <fcntl.h>
	#include <unistd.h>
	#include <getopt.h>

	#include <mtd/mtd-user.h>
	#include <linux/types.h>
	#include <mtd_swab.h>

	/* next is an array of mapping for each corresponding sector */
	#define RFD_MAGIC 0x9193
	#define HEADER_MAP_OFFSET 3
	#define SECTOR_DELETED 0x0000
	#define SECTOR_ZERO 0xfffe
	#define SECTOR_FREE 0xffff

	#define SECTOR_SIZE 512

	#define SECTORS_PER_TRACK 63


	struct rfd {
	int block_size;
	int block_count;
	int header_sectors;
	int data_sectors;
	int header_size;
	uint16_t *header;
	int sector_count;
	int *sector_map;
	const char *mtd_filename;
	const char *out_filename;
	int verbose;
	};

	void display_help(void)
	{
	printf("Usage: %s [OPTIONS] MTD-device filename\n"
	"Dumps the contents of a resident flash disk\n"
	"\n"
	"-h --help display this help and exit\n"
	"-V --version output version information and exit\n"
	"-v --verbose Be verbose\n"
	"-b size --blocksize Block size (defaults to erase unit)\n",
	PROGRAM_NAME);
	exit(0);
	}

	void display_version(void)
	{
	printf("%s " VERSION "\n"
	"\n"
	"This is free software; see the source for copying conditions. There is NO\n"
	"warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.\n",
	PROGRAM_NAME);

	exit(0);
	}

	void process_options(int argc, char argv[], struct rfd rfd)
	{
	int error = 0;

	rfd->block_size = 0;
	rfd->verbose = 0;

	for (;;) {
	int option_index = 0;
	static const char *short_options = "hvVb:";
	static const struct option long_options[] = {
	{ "help", no_argument, 0, 'h' },
	{ "version", no_argument, 0, 'V', },
	{ "blocksize", required_argument, 0, 'b' },
	{ "verbose", no_argument, 0, 'v' },
	{ NULL, 0, 0, 0 }
	};

	int c = getopt_long(argc, argv, short_options,
	long_options, &option_index);
	if (c == EOF)
	break;

	switch (c) {
	case 'h':
	display_help();
	break;
	case 'V':
	display_version();
	break;
	case 'v':
	rfd->verbose = 1;
	break;
	case 'b':
	rfd->block_size = atoi(optarg);
	break;
	case '?':
	error = 1;
	break;
	}
	}

	if ((argc - optind) != 2 \|\| error)
	display_help();

	rfd->mtd_filename = argv[optind];
	rfd->out_filename = argv[optind + 1];
	}

	int build_block_map(struct rfd *rfd, int fd, int block)
	{
	int i;
	int sectors;

	if (pread(fd, rfd->header, rfd->header_size, block * rfd->block_size)
	!= rfd->header_size) {
	return -1;
	}

	if (le16_to_cpu(rfd->header[0]) != RFD_MAGIC) {
	if (rfd->verbose)
	printf("Block #%02d: Magic missing\n", block);

	return 0;
	}

	sectors = 0;
	for (i=0; i<rfd->data_sectors; i++) {
	uint16_t entry = le16_to_cpu(rfd->header[i + HEADER_MAP_OFFSET]);

	if (entry == SECTOR_FREE \|\| entry == SECTOR_DELETED)
	continue;

	if (entry == SECTOR_ZERO)
	entry = 0;

	if (entry >= rfd->sector_count) {
	fprintf(stderr, "%s: warning: sector %d out of range\n",
	rfd->mtd_filename, entry);
	continue;
	}

	if (rfd->sector_map[entry] != -1) {
	fprintf(stderr, "%s: warning: more than one entry "
	"for sector %d\n", rfd->mtd_filename, entry);
	continue;
	}

	rfd->sector_map[entry] = rfd->block_size * block +
	(i + rfd->header_sectors) * SECTOR_SIZE;
	sectors++;
	}

	if (rfd->verbose)
	printf("Block #%02d: %d sectors\n", block, sectors);

	return 1;
	}

	int main(int argc, char *argv[])
	{
	int fd, sectors_per_block;
	mtd_info_t mtd_info;
	struct rfd rfd;
	int i, blocks_found;
	int out_fd = 0;
	uint8_t sector[512];
	int blank, rc, cylinders;

	process_options(argc, argv, &rfd);

	fd = open(rfd.mtd_filename, O_RDONLY);
	if (fd == -1) {
	perror(rfd.mtd_filename);
	return 1;
	}

	if (rfd.block_size == 0) {
	if (ioctl(fd, MEMGETINFO, &mtd_info)) {
	perror(rfd.mtd_filename);
	close(fd);
	return 1;
	}

	if (mtd_info.type != MTD_NORFLASH) {
	fprintf(stderr, "%s: wrong type\n", rfd.mtd_filename);
	close(fd);
	return 2;
	}

	sectors_per_block = mtd_info.erasesize / SECTOR_SIZE;

	rfd.block_size = mtd_info.erasesize;
	rfd.block_count = mtd_info.size / mtd_info.erasesize;
	} else {
	struct stat st;

	if (fstat(fd, &st) == -1) {
	perror(rfd.mtd_filename);
	close(fd);
	return 1;
	}

	if (st.st_size % SECTOR_SIZE)
	fprintf(stderr, "%s: warning: not a multiple of sectors (512 bytes)\n", rfd.mtd_filename);

	sectors_per_block = rfd.block_size / SECTOR_SIZE;

	if (st.st_size % rfd.block_size)
	fprintf(stderr, "%s: warning: not a multiple of block size\n", rfd.mtd_filename);

	rfd.block_count = st.st_size / rfd.block_size;

	if (!rfd.block_count) {
	fprintf(stderr, "%s: not large enough for one block\n", rfd.mtd_filename);
	close(fd);
	return 2;
	}
	}

	rfd.header_sectors =
	((HEADER_MAP_OFFSET + sectors_per_block) *
	sizeof(uint16_t) + SECTOR_SIZE - 1) / SECTOR_SIZE;
	rfd.data_sectors = sectors_per_block - rfd.header_sectors;
	cylinders = ((rfd.block_count - 1) * rfd.data_sectors - 1)
	/ SECTORS_PER_TRACK;
	rfd.sector_count = cylinders * SECTORS_PER_TRACK;
	rfd.header_size =
	(HEADER_MAP_OFFSET + rfd.data_sectors) * sizeof(uint16_t);

	rfd.header = malloc(rfd.header_size);
	if (!rfd.header) {
	perror(PROGRAM_NAME);
	close(fd);
	return 2;
	}
	rfd.sector_map = malloc(rfd.sector_count * sizeof(int));
	if (!rfd.sector_map) {
	perror(PROGRAM_NAME);
	close(fd);
	free(rfd.sector_map);
	return 2;
	}

	rfd.mtd_filename = rfd.mtd_filename;

	for (i=0; i<rfd.sector_count; i++)
	rfd.sector_map[i] = -1;

	for (blocks_found=i=0; i<rfd.block_count; i++) {
	rc = build_block_map(&rfd, fd, i);
	if (rc > 0)
	blocks_found++;
	if (rc < 0)
	goto err;
	}

	if (!blocks_found) {
	fprintf(stderr, "%s: no RFD blocks found\n", rfd.mtd_filename);
	goto err;
	}

	for (i=0; i<rfd.sector_count; i++) {
	if (rfd.sector_map[i] != -1)
	break;
	}

	if (i == rfd.sector_count) {
	fprintf(stderr, "%s: no sectors found\n", rfd.mtd_filename);
	goto err;
	}

	out_fd = open(rfd.out_filename, O_WRONLY \| O_TRUNC \| O_CREAT, 0666);
	if (out_fd == -1) {
	perror(rfd.out_filename);
	goto err;
	}

	blank = 0;
	for (i=0; i<rfd.sector_count; i++) {
	if (rfd.sector_map[i] == -1) {
	memset(sector, 0, SECTOR_SIZE);
	blank++;
	} else {
	if (pread(fd, sector, SECTOR_SIZE, rfd.sector_map[i])
	!= SECTOR_SIZE) {
	perror(rfd.mtd_filename);
	goto err;
	}
	}

	if (write(out_fd, sector, SECTOR_SIZE) != SECTOR_SIZE) {
	perror(rfd.out_filename);
	goto err;
	}
	}

	if (rfd.verbose)
	printf("Copied %d sectors (%d blank)\n", rfd.sector_count, blank);

	close(out_fd);
	close(fd);
	free(rfd.header);
	free(rfd.sector_map);

	return 0;

	err:
	if (out_fd)
	close(out_fd);

	close(fd);
	free(rfd.header);
	free(rfd.sector_map);

	return 2;
	}