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Diffstat (limited to 'ubi-utils/src/unubi.c')
| -rw-r--r-- | ubi-utils/src/unubi.c | 392 |
1 files changed, 392 insertions, 0 deletions
diff --git a/ubi-utils/src/unubi.c b/ubi-utils/src/unubi.c new file mode 100644 index 0000000..6d877e7 --- /dev/null +++ b/ubi-utils/src/unubi.c @@ -0,0 +1,392 @@ +/* + * Copyright (c) International Business Machines Corp., 2006 + * + * 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. + * + * 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, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + * + * Author: Frank Haverkamp + * + * An utility to decompose UBI images. Not yet finished ... + */ + +#include <config.h> +#include <argp.h> +#include <errno.h> +#include <fcntl.h> +#include <stdio.h> +#include <stdint.h> +#include <getopt.h> +#include <stdarg.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <sys/ioctl.h> +#include <sys/stat.h> +#include <sys/types.h> + +#include "crc32.h" +#include <mtd/ubi-header.h> + +#define MAXPATH 1024 +#define MIN(x,y) ((x)<(y)?(x):(y)) + +static uint32_t crc32_table[256]; + +struct args { + const char *output_dir; + uint32_t hdr_offs; + uint32_t data_offs; + uint32_t blocksize; + + /* special stuff needed to get additional arguments */ + char *arg1; + char **options; /* [STRING...] */ +}; + +static struct args myargs = { + .output_dir = "unubi", + .hdr_offs = 64, + .data_offs = 128, + .blocksize = 128 * 1024, + .arg1 = NULL, + .options = NULL, +}; + +static error_t parse_opt (int key, char *arg, struct argp_state *state); + +const char *argp_program_bug_address = + "... uuuh, lets wait until it looks nicer"; + +static char doc[] = "\nVersion: " PACKAGE_VERSION "\n\t" + BUILD_OS" "BUILD_CPU" at "__DATE__" "__TIME__"\n" + "\nWrite to UBI Volume.\n"; + +static struct argp_option options[] = { + { .name = "dir", + .key = 'd', + .arg = "<output-dir>", + .flags = 0, + .doc = "output directory", + .group = OPTION_ARG_OPTIONAL }, + + { .name = "blocksize", + .key = 'b', + .arg = "<blocksize>", + .flags = 0, + .doc = "blocksize", + .group = OPTION_ARG_OPTIONAL }, + + { .name = "data-offs", + .key = 'x', + .arg = "<data-offs>", + .flags = 0, + .doc = "data offset", + .group = OPTION_ARG_OPTIONAL }, + + { .name = "hdr-offs", + .key = 'x', + .arg = "<hdr-offs>", + .flags = 0, + .doc = "hdr offset", + .group = OPTION_ARG_OPTIONAL }, + + { .name = NULL, .key = 0, .arg = NULL, .flags = 0, + .doc = NULL, .group = 0 }, +}; + +static struct argp argp = { + .options = options, + .parser = parse_opt, + .args_doc = "image-file", + .doc = doc, + .children = NULL, + .help_filter = NULL, + .argp_domain = NULL, +}; + +/* + * str_to_num - Convert string into number and cope with endings like + * k, K, kib, KiB for kilobyte + * m, M, mib, MiB for megabyte + */ +uint32_t str_to_num(char *str) +{ + char *s = str; + ulong num = strtoul(s, &s, 0); + + if (*s != '\0') { + if (strcmp(s, "KiB") == 0) + num *= 1024; + else if (strcmp(s, "MiB") == 0) + num *= 1024*1024; + else { + fprintf(stderr, "WARNING: Wrong number format " + "\"%s\", check your paramters!\n", str); + } + } + return num; +} + +/* + * @brief Parse the arguments passed into the test case. + * + * @param key The parameter. + * @param arg Argument passed to parameter. + * @param state Location to put information on parameters. + * + * @return error + * + * Get the `input' argument from `argp_parse', which we know is a + * pointer to our arguments structure. + */ +static error_t +parse_opt(int key, char *arg, struct argp_state *state) +{ + struct args *args = state->input; + + switch (key) { + case 'b': /* --blocksize<blocksize> */ + args->blocksize = str_to_num(arg); + break; + + case 'x': /* --data-offs=<data-offs> */ + args->data_offs = str_to_num(arg); + break; + + case 'y': /* --hdr-offs=<hdr-offs> */ + args->hdr_offs = str_to_num(arg); + break; + + case 'd': /* --dir=<output-dir> */ + args->output_dir = arg; + break; + + case ARGP_KEY_NO_ARGS: + /* argp_usage(state); */ + break; + + case ARGP_KEY_ARG: + args->arg1 = arg; + /* Now we consume all the rest of the arguments. + `state->next' is the index in `state->argv' of the + next argument to be parsed, which is the first STRING + we're interested in, so we can just use + `&state->argv[state->next]' as the value for + arguments->strings. + + _In addition_, by setting `state->next' to the end + of the arguments, we can force argp to stop parsing + here and return. */ + + args->options = &state->argv[state->next]; + state->next = state->argc; + break; + + case ARGP_KEY_END: + /* argp_usage(state); */ + break; + + default: + return(ARGP_ERR_UNKNOWN); + } + + return 0; +} + +static inline void +hexdump(FILE *fp, const void *p, ssize_t size) +{ + int k; + const uint8_t *buf = p; + + for (k = 0; k < size; k++) { + fprintf(fp, "%02x ", buf[k]); + if ((k & 15) == 15) + fprintf(fp, "\n"); + } +} + +/* + * This was put together in 1.5 hours and this is exactly how it looks + * like! FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME FIXME + * FIXME FIXME FIXME FIXME FIXME FIXME! + */ +static int extract_volume(struct args *args, const uint8_t *buf, + int len, int volume, FILE *fp) +{ + int i, rc; + int nrblocks = len / args->blocksize; + int max_lnum = -1, lnum = 0; + const uint8_t *ptr; + uint8_t **vol_tab; + int *vol_len; + + vol_tab = calloc(nrblocks, sizeof(uint8_t *)); + vol_len = calloc(nrblocks, sizeof(int)); + + if (!buf || !vol_tab || !vol_len) + exit(EXIT_FAILURE); + + for (i = 0, ptr = buf; i < nrblocks; i++, ptr += args->blocksize) { + uint32_t crc; + struct ubi_ec_hdr *ec_hdr = (struct ubi_ec_hdr *)ptr; + struct ubi_vid_hdr *vid_hdr = NULL; + uint8_t *data; + + /* default */ + vol_len[lnum] = args->blocksize - (2 * 1024); + + /* Check UBI EC header */ + crc = clc_crc32(crc32_table, UBI_CRC32_INIT, ec_hdr, + UBI_EC_HDR_SIZE_CRC); + if (crc != ubi32_to_cpu(ec_hdr->hdr_crc)) + continue; + + vid_hdr = (struct ubi_vid_hdr *) + (ptr + ubi32_to_cpu(ec_hdr->vid_hdr_offset)); + data = (uint8_t *)(ptr + ubi32_to_cpu(ec_hdr->data_offset)); + + crc = clc_crc32(crc32_table, UBI_CRC32_INIT, vid_hdr, + UBI_VID_HDR_SIZE_CRC); + if (crc != ubi32_to_cpu(vid_hdr->hdr_crc)) + continue; + + if (volume == (int)ubi32_to_cpu(vid_hdr->vol_id)) { + + printf("****** block %4d volume %2d **********\n", + i, volume); + + hexdump(stdout, ptr, 64); + + printf("--- vid_hdr\n"); + hexdump(stdout, vid_hdr, 64); + + printf("--- data\n"); + hexdump(stdout, data, 64); + + lnum = ubi32_to_cpu(vid_hdr->lnum); + vol_tab[lnum] = data; + if (max_lnum < lnum) + max_lnum = lnum; + if (vid_hdr->vol_type == UBI_VID_STATIC) + vol_len[lnum] = + ubi32_to_cpu(vid_hdr->data_size); + + } + } + + for (lnum = 0; lnum <= max_lnum; lnum++) { + if (vol_tab[lnum]) { + rc = fwrite(vol_tab[lnum], 1, vol_len[lnum], fp); + if (ferror(fp) || (vol_len[lnum] != rc)) { + perror("could not write file"); + exit(EXIT_FAILURE); + } + } else { + /* Fill up empty areas by 0xff, for static + * volumes this means they are broken! + */ + for (i = 0; i < vol_len[lnum]; i++) { + if (fputc(0xff, fp) == EOF) { + perror("could not write char"); + exit(EXIT_FAILURE); + } + } + } + } + + free(vol_tab); + free(vol_len); + return 0; +} + +int +main(int argc, char *argv[]) +{ + int len, rc; + FILE *fp; + struct stat file_info; + uint8_t *buf; + int i; + + init_crc32_table(crc32_table); + + argp_parse(&argp, argc, argv, ARGP_IN_ORDER, 0, &myargs); + + if (!myargs.arg1) { + fprintf(stderr, "Please specify input file!\n"); + exit(EXIT_FAILURE); + } + + fp = fopen(myargs.arg1, "r"); + if (!fp) { + perror("Cannot open file"); + exit(EXIT_FAILURE); + } + if (fstat(fileno(fp), &file_info) != 0) { + fprintf(stderr, "Cannot fetch file size " + "from input file.\n"); + } + len = file_info.st_size; + buf = malloc(len); + if (!buf) { + perror("out of memory!"); + exit(EXIT_FAILURE); + } + rc = fread(buf, 1, len, fp); + if (ferror(fp) || (len != rc)) { + perror("could not read file"); + exit(EXIT_FAILURE); + } + if (!myargs.output_dir) { + fprintf(stderr, "No output directory specified!\n"); + exit(EXIT_FAILURE); + } + + rc = mkdir(myargs.output_dir, 0777); + if (rc && errno != EEXIST) { + perror("Cannot create output directory"); + exit(EXIT_FAILURE); + } + for (i = 0; i < 32; i++) { + char fname[1024]; + FILE *fpout; + + printf("######### VOLUME %d ############################\n", + i); + + sprintf(fname, "%s/ubivol_%d.bin", myargs.output_dir, i); + fpout = fopen(fname, "w+"); + if (!fpout) { + perror("Cannot open file"); + exit(EXIT_FAILURE); + } + extract_volume(&myargs, buf, len, i, fpout); + fclose(fpout); + } + + fclose(fp); + free(buf); + exit(EXIT_SUCCESS); +} |