[LEDE-DEV,1/2] firmware-utils: add otrx tool for handling TRX images

Message ID 20171114221658.29563-1-zajec5@gmail.com
State Changes Requested
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Series
  • [LEDE-DEV,1/2] firmware-utils: add otrx tool for handling TRX images
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Commit Message

Rafał Miłecki Nov. 14, 2017, 10:16 p.m.
From: Rafał Miłecki <rafal@milecki.pl>

It can be a replacement for the trx tool. The advantage is that otrx
doesn't alloc buffer for the whole TRX which can be a nice optimization
when creating big images.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
 tools/firmware-utils/Makefile   |   1 +
 tools/firmware-utils/src/otrx.c | 595 ++++++++++++++++++++++++++++++++++++++++
 2 files changed, 596 insertions(+)
 create mode 100644 tools/firmware-utils/src/otrx.c

Comments

Hauke Mehrtens Nov. 15, 2017, 9:38 p.m. | #1
On 11/14/2017 11:16 PM, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> It can be a replacement for the trx tool. The advantage is that otrx
> doesn't alloc buffer for the whole TRX which can be a nice optimization
> when creating big images.
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

Please fix the minor bugs, but this looks better than the old solution.

Acked-by: Hauke Mehrtens <hauke@hauke-m.de>

> ---
>  tools/firmware-utils/Makefile   |   1 +
>  tools/firmware-utils/src/otrx.c | 595 ++++++++++++++++++++++++++++++++++++++++
>  2 files changed, 596 insertions(+)
>  create mode 100644 tools/firmware-utils/src/otrx.c
> 
> diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile
> index b7addbbb93..ca41387b5e 100644
> --- a/tools/firmware-utils/Makefile
> +++ b/tools/firmware-utils/Makefile
> @@ -20,6 +20,7 @@ define Host/Compile
>  	$(call cc,addpattern)
>  	$(call cc,asustrx)
>  	$(call cc,trx)
> +	$(call cc,otrx)
>  	$(call cc,motorola-bin)
>  	$(call cc,dgfirmware)
>  	$(call cc,mksenaofw md5)
> diff --git a/tools/firmware-utils/src/otrx.c b/tools/firmware-utils/src/otrx.c
> new file mode 100644
> index 0000000000..8833e43a89
> --- /dev/null
> +++ b/tools/firmware-utils/src/otrx.c
> @@ -0,0 +1,595 @@
> +/*
> + * otrx
> + *
> + * Copyright (C) 2015 Rafał Miłecki <zajec5@gmail.com>
> + *
> + * 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.
> + */
> +
> +#include <byteswap.h>
> +#include <endian.h>
> +#include <errno.h>
> +#include <stdint.h>
> +#include <stdio.h>
> +#include <stdlib.h>
> +#include <string.h>
> +#include <unistd.h>
> +
> +#if !defined(__BYTE_ORDER)
> +#error "Unknown byte order"
> +#endif
> +
> +#if __BYTE_ORDER == __BIG_ENDIAN
> +#define cpu_to_le32(x)	bswap_32(x)
> +#define le32_to_cpu(x)	bswap_32(x)
> +#elif __BYTE_ORDER == __LITTLE_ENDIAN
> +#define cpu_to_le32(x)	(x)
> +#define le32_to_cpu(x)	(x)
> +#else
> +#error "Unsupported endianness"
> +#endif
> +
> +#define TRX_MAGIC			0x30524448
> +#define TRX_FLAGS_OFFSET		12
> +#define TRX_MAX_PARTS			3
> +
> +struct trx_header {
> +	uint32_t magic;
> +	uint32_t length;
> +	uint32_t crc32;
> +	uint16_t flags;
> +	uint16_t version;
> +	uint32_t offset[3];
> +};
> +
> +char *trx_path;
> +size_t trx_offset = 0;
> +char *partition[TRX_MAX_PARTS] = {};
> +
> +static inline size_t otrx_min(size_t x, size_t y) {
> +	return x < y ? x : y;
> +}
> +
> +/**************************************************
> + * CRC32
> + **************************************************/
> +
> +static const uint32_t crc32_tbl[] = {
> +	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
> +	0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
> +	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
> +	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
> +	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
> +	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
> +	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
> +	0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
> +	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
> +	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
> +	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
> +	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
> +	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
> +	0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
> +	0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
> +	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
> +	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
> +	0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
> +	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
> +	0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
> +	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
> +	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
> +	0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
> +	0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
> +	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
> +	0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
> +	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
> +	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
> +	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
> +	0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
> +	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
> +	0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
> +	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
> +	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
> +	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
> +	0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
> +	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
> +	0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
> +	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
> +	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
> +	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
> +	0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
> +	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
> +	0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
> +	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
> +	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
> +	0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
> +	0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
> +	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
> +	0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
> +	0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
> +	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
> +	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
> +	0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
> +	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
> +	0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
> +	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
> +	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
> +	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
> +	0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
> +	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
> +	0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
> +	0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
> +	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
> +};
> +
> +uint32_t otrx_crc32(uint32_t crc, uint8_t *buf, size_t len) {
> +	while (len) {
> +		crc = crc32_tbl[(crc ^ *buf) & 0xff] ^ (crc >> 8);
> +		buf++;
> +		len--;
> +	}
> +
> +	return crc;
> +}
> +
> +/**************************************************
> + * Check
> + **************************************************/
> +
> +static void otrx_check_parse_options(int argc, char **argv) {
> +	int c;
> +
> +	while ((c = getopt(argc, argv, "o:")) != -1) {
> +		switch (c) {
> +		case 'o':
> +			trx_offset = atoi(optarg);
> +			break;
> +		}
> +	}
> +}
> +
> +static int otrx_check(int argc, char **argv) {
> +	FILE *trx;
> +	struct trx_header hdr;
> +	size_t bytes, length;
> +	uint8_t buf[1024];
> +	uint32_t crc32;
> +	int err = 0;
> +
> +	if (argc < 3) {
> +		fprintf(stderr, "No TRX file passed\n");
> +		err = -EINVAL;
> +		goto out;
> +	}
> +	trx_path = argv[2];
> +
> +	optind = 3;
> +	otrx_check_parse_options(argc, argv);
> +
> +	trx = fopen(trx_path, "r");
> +	if (!trx) {
> +		fprintf(stderr, "Couldn't open %s\n", trx_path);
> +		err = -EACCES;
> +		goto out;
> +	}
> +
> +	fseek(trx, trx_offset, SEEK_SET);
> +	bytes = fread(&hdr, 1, sizeof(hdr), trx);
> +	if (bytes != sizeof(hdr)) {
> +		fprintf(stderr, "Couldn't read %s header\n", trx_path);
> +		err =  -EIO;
> +		goto err_close;
> +	}
> +
> +	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
> +		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
> +		err =  -EINVAL;
> +		goto err_close;
> +	}
> +
> +	length = le32_to_cpu(hdr.length);
> +	if (length < sizeof(hdr)) {
> +		fprintf(stderr, "Length read from TRX too low (%zu B)\n", length);
> +		err = -EINVAL;
> +		goto err_close;
> +	}
> +
> +	crc32 = 0xffffffff;
> +	fseek(trx, trx_offset + TRX_FLAGS_OFFSET, SEEK_SET);
> +	length -= TRX_FLAGS_OFFSET;
> +	while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
> +		crc32 = otrx_crc32(crc32, buf, bytes);
> +		length -= bytes;
> +	}
> +
> +	if (length) {
> +		fprintf(stderr, "Couldn't read last %zd B of data from %s\n", length, trx_path);
> +		err = -EIO;
> +		goto err_close;
> +	}
> +
> +	if (crc32 != le32_to_cpu(hdr.crc32)) {
> +		fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", crc32, le32_to_cpu(hdr.crc32));
> +		err =  -EINVAL;
> +		goto err_close;
> +	}
> +
> +	printf("Found a valid TRX version %d\n", le32_to_cpu(hdr.version));
> +
> +err_close:
> +	fclose(trx);
> +out:
> +	return err;
> +}
> +
> +/**************************************************
> + * Create
> + **************************************************/
> +
> +static void otrx_create_parse_options(int argc, char **argv) {
> +}

Why do you have this empty function?

> +static ssize_t otrx_create_append_file(FILE *trx, const char *in_path) {
> +	FILE *in;
> +	size_t bytes;
> +	ssize_t length = 0;
> +	uint8_t buf[128];

I would make this bigger, most files are multiple MB in size, so 1KB or
something like this would be better.

> +
> +	in = fopen(in_path, "r");
> +	if (!in) {
> +		fprintf(stderr, "Couldn't open %s\n", in_path);

I think printing the errno would help debugging if we ran into this place.

> +		return -EACCES;
> +	}
> +
> +	while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) {
> +		if (fwrite(buf, 1, bytes, trx) != bytes) {
> +			fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, trx_path);
> +			length = -EIO;
> +			break;
> +		}
> +		length += bytes;
> +	}
> +
> +	fclose(in);
> +
> +	return length;
> +}
> +
> +static ssize_t otrx_create_append_zeros(FILE *trx, size_t length) {
> +	uint8_t *buf;
> +
> +	buf = malloc(length);
> +	if (!buf)
> +		return -ENOMEM;

You missed free(buf);

> +	memset(buf, 0, length);
> +
> +	if (fwrite(buf, 1, length, trx) != length) {
> +		fprintf(stderr, "Couldn't write %zu B to %s\n", length, trx_path);
> +		return -EIO;
> +	}
> +
> +	return length;
> +}
> +
> +static ssize_t otrx_create_align(FILE *trx, size_t curr_offset, size_t alignment) {
> +	if (curr_offset & (alignment - 1)) {
> +		size_t length = alignment - (curr_offset % alignment);
> +		return otrx_create_append_zeros(trx, length);
> +	}
> +
> +	return 0;
> +}
> +
> +static int otrx_create_write_hdr(FILE *trx, struct trx_header *hdr) {
> +	size_t bytes, length;
> +	uint8_t buf[1024];
> +	uint32_t crc32;
> +
> +	hdr->magic = cpu_to_le32(TRX_MAGIC);
> +	hdr->version = 1;
> +
> +	fseek(trx, 0, SEEK_SET);
> +	bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
> +	if (bytes != sizeof(struct trx_header)) {
> +		fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
> +		return -EIO;
> +	}
> +
> +	length = le32_to_cpu(hdr->length);
> +
> +	crc32 = 0xffffffff;
> +	fseek(trx, TRX_FLAGS_OFFSET, SEEK_SET);
> +	length -= TRX_FLAGS_OFFSET;
> +	while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
> +		crc32 = otrx_crc32(crc32, buf, bytes);
> +		length -= bytes;
> +	}
> +	hdr->crc32 = cpu_to_le32(crc32);
> +
> +	fseek(trx, 0, SEEK_SET);
> +	bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
> +	if (bytes != sizeof(struct trx_header)) {
> +		fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
> +		return -EIO;
> +	}
> +
> +	return 0;
> +}
> +
> +static int otrx_create(int argc, char **argv) {
> +	FILE *trx;
> +	struct trx_header hdr = {};
> +	ssize_t sbytes;
> +	size_t curr_idx = 0;
> +	size_t curr_offset = sizeof(hdr);
> +	int c;
> +	int err = 0;
> +
> +	if (argc < 3) {
> +		fprintf(stderr, "No TRX file passed\n");
> +		err = -EINVAL;
> +		goto out;
> +	}
> +	trx_path = argv[2];
> +
> +	optind = 3;
> +	otrx_create_parse_options(argc, argv);
> +
> +	trx = fopen(trx_path, "w+");
> +	if (!trx) {
> +		fprintf(stderr, "Couldn't open %s\n", trx_path);
> +		err = -EACCES;
> +		goto out;
> +	}
> +	fseek(trx, curr_offset, SEEK_SET);
> +
> +	optind = 3;
> +	while ((c = getopt(argc, argv, "f:A:a:b:")) != -1) {
> +		switch (c) {
> +		case 'f':
> +			if (curr_idx >= TRX_MAX_PARTS) {
> +				err = -ENOSPC;
> +				fprintf(stderr, "Reached TRX partitions limit, no place for %s\n", optarg);
> +				goto err_close;
> +			}
> +
> +			sbytes = otrx_create_append_file(trx, optarg);
> +			if (sbytes < 0) {
> +				fprintf(stderr, "Failed to append file %s\n", optarg);
> +			} else {
> +				hdr.offset[curr_idx++] = curr_offset;
> +				curr_offset += sbytes;
> +			}
> +
> +			sbytes = otrx_create_align(trx, curr_offset, 4);
> +			if (sbytes < 0)
> +				fprintf(stderr, "Failed to append zeros\n");
> +			else
> +				curr_offset += sbytes;
> +
> +			break;
> +		case 'A':
> +			sbytes = otrx_create_append_file(trx, optarg);
> +			if (sbytes < 0) {
> +				fprintf(stderr, "Failed to append file %s\n", optarg);
> +			} else {
> +				curr_offset += sbytes;
> +			}
> +
> +			sbytes = otrx_create_align(trx, curr_offset, 4);
> +			if (sbytes < 0)
> +				fprintf(stderr, "Failed to append zeros\n");
> +			else
> +				curr_offset += sbytes;
> +			break;
> +		case 'a':
> +			sbytes = otrx_create_align(trx, curr_offset, strtol(optarg, NULL, 0));
> +			if (sbytes < 0)
> +				fprintf(stderr, "Failed to append zeros\n");
> +			else
> +				curr_offset += sbytes;
> +			break;
> +		case 'b':
> +			sbytes = strtol(optarg, NULL, 0) - curr_offset;
> +			if (sbytes < 0) {
> +				fprintf(stderr, "Current TRX length is 0x%zx, can't pad it with zeros to 0x%lx\n", curr_offset, strtol(optarg, NULL, 0));
> +			} else {
> +				sbytes = otrx_create_append_zeros(trx, sbytes);
> +				if (sbytes < 0)
> +					fprintf(stderr, "Failed to append zeros\n");
> +				else
> +					curr_offset += sbytes;
> +			}
> +			break;
> +		}
> +		if (err)
> +			break;
> +	}
> +
> +	sbytes = otrx_create_align(trx, curr_offset, 0x1000);
> +	if (sbytes < 0)
> +		fprintf(stderr, "Failed to append zeros\n");
> +	else
> +		curr_offset += sbytes;
> +
> +	hdr.length = curr_offset;
> +	otrx_create_write_hdr(trx, &hdr);
> +err_close:
> +	fclose(trx);
> +out:
> +	return err;
> +}
> +
> +/**************************************************
> + * Extract
> + **************************************************/
> +
> +static void otrx_extract_parse_options(int argc, char **argv) {
> +	int c;
> +
> +	while ((c = getopt(argc, argv, "c:e:o:1:2:3:")) != -1) {
> +		switch (c) {
> +		case 'o':
> +			trx_offset = atoi(optarg);
> +			break;
> +		case '1':
> +			partition[0] = optarg;
> +			break;
> +		case '2':
> +			partition[1] = optarg;
> +			break;
> +		case '3':
> +			partition[2] = optarg;
> +			break;
> +		}
> +	}
> +}
> +
> +static int otrx_extract_copy(FILE *trx, size_t offset, size_t length, char *out_path) {
> +	FILE *out;
> +	size_t bytes;
> +	uint8_t *buf;
> +	int err = 0;
> +
> +	out = fopen(out_path, "w");
> +	if (!out) {
> +		fprintf(stderr, "Couldn't open %s\n", out_path);
> +		err = -EACCES;
> +		goto out;
> +	}
> +
> +	buf = malloc(length);
> +	if (!buf) {
> +		fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
> +		err =  -ENOMEM;
> +		goto err_close;
> +	}
> +
> +	fseek(trx, offset, SEEK_SET);
> +	bytes = fread(buf, 1, length, trx);
> +	if (bytes != length) {
> +		fprintf(stderr, "Couldn't read %zu B of data from %s\n", length, trx_path);
> +		err =  -ENOMEM;
> +		goto err_free_buf;
> +	};
> +
> +	bytes = fwrite(buf, 1, length, out);
> +	if (bytes != length) {
> +		fprintf(stderr, "Couldn't write %zu B to %s\n", length, out_path);
> +		err =  -ENOMEM;
> +		goto err_free_buf;
> +	}
> +
> +	printf("Extracted 0x%zx bytes into %s\n", length, out_path);
> +
> +err_free_buf:
> +	free(buf);
> +err_close:
> +	fclose(out);
> +out:
> +	return err;
> +}
> +
> +static int otrx_extract(int argc, char **argv) {
> +	FILE *trx;
> +	struct trx_header hdr;
> +	size_t bytes;
> +	int i;
> +	int err = 0;
> +
> +	if (argc < 3) {
> +		fprintf(stderr, "No TRX file passed\n");
> +		err = -EINVAL;
> +		goto out;
> +	}
> +	trx_path = argv[2];
> +
> +	optind = 3;
> +	otrx_extract_parse_options(argc, argv);
> +
> +	trx = fopen(trx_path, "r");
> +	if (!trx) {
> +		fprintf(stderr, "Couldn't open %s\n", trx_path);
> +		err = -EACCES;
> +		goto out;
> +	}
> +
> +	fseek(trx, trx_offset, SEEK_SET);
> +	bytes = fread(&hdr, 1, sizeof(hdr), trx);
> +	if (bytes != sizeof(hdr)) {
> +		fprintf(stderr, "Couldn't read %s header\n", trx_path);
> +		err =  -EIO;
> +		goto err_close;
> +	}
> +
> +	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
> +		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
> +		err =  -EINVAL;
> +		goto err_close;
> +	}
> +
> +	for (i = 0; i < TRX_MAX_PARTS; i++) {
> +		size_t length;
> +
> +		if (!partition[i])
> +			continue;
> +		if (!hdr.offset[i]) {
> +			printf("TRX doesn't contain partition %d, can't extract %s\n", i + 1, partition[i]);
> +			continue;
> +		}
> +
> +		if (i + 1 >= TRX_MAX_PARTS || !hdr.offset[i + 1])
> +			length = le32_to_cpu(hdr.length) - le32_to_cpu(hdr.offset[i]);
> +		else
> +			length = le32_to_cpu(hdr.offset[i + 1]) - le32_to_cpu(hdr.offset[i]);
> +
> +		otrx_extract_copy(trx, trx_offset + le32_to_cpu(hdr.offset[i]), length, partition[i]);
> +	}
> +
> +err_close:
> +	fclose(trx);
> +out:
> +	return err;
> +}
> +
> +/**************************************************
> + * Start
> + **************************************************/
> +
> +static void usage() {
> +	printf("Usage:\n");
> +	printf("\n");
> +	printf("Checking TRX file:\n");
> +	printf("\totrx check <file> [options]\tcheck if file is a valid TRX\n");
> +	printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
> +	printf("\n");
> +	printf("Creating new TRX file:\n");
> +	printf("\totrx create <file> [options] [partitions]\n");
> +	printf("\t-f file\t\t\t\t[partition] start new partition with content copied from file\n");
> +	printf("\t-A file\t\t\t\t[partition] append current partition with content copied from file\n");
> +	printf("\t-a alignment\t\t\t[partition] align current partition\n");
> +	printf("\t-b offset\t\t\t[partition] append zeros to partition till reaching absolute offset\n");
> +	printf("\n");
> +	printf("Extracting from TRX file:\n");
> +	printf("\totrx extract <file> [options]\textract partitions from TRX file\n");
> +	printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
> +	printf("\t-1 file\t\t\t\tfile to extract 1st partition to (optional)\n");
> +	printf("\t-2 file\t\t\t\tfile to extract 2nd partition to (optional)\n");
> +	printf("\t-3 file\t\t\t\tfile to extract 3rd partition to (optional)\n");
> +}
> +
> +int main(int argc, char **argv) {
> +	if (argc > 1) {
> +		if (!strcmp(argv[1], "check"))
> +			return otrx_check(argc, argv);
> +		else if (!strcmp(argv[1], "create"))
> +			return otrx_create(argc, argv);
> +		else if (!strcmp(argv[1], "extract"))
> +			return otrx_extract(argc, argv);
> +	}
> +
> +	usage();
> +	return 0;
> +}
>

Patch

diff --git a/tools/firmware-utils/Makefile b/tools/firmware-utils/Makefile
index b7addbbb93..ca41387b5e 100644
--- a/tools/firmware-utils/Makefile
+++ b/tools/firmware-utils/Makefile
@@ -20,6 +20,7 @@  define Host/Compile
 	$(call cc,addpattern)
 	$(call cc,asustrx)
 	$(call cc,trx)
+	$(call cc,otrx)
 	$(call cc,motorola-bin)
 	$(call cc,dgfirmware)
 	$(call cc,mksenaofw md5)
diff --git a/tools/firmware-utils/src/otrx.c b/tools/firmware-utils/src/otrx.c
new file mode 100644
index 0000000000..8833e43a89
--- /dev/null
+++ b/tools/firmware-utils/src/otrx.c
@@ -0,0 +1,595 @@ 
+/*
+ * otrx
+ *
+ * Copyright (C) 2015 Rafał Miłecki <zajec5@gmail.com>
+ *
+ * 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.
+ */
+
+#include <byteswap.h>
+#include <endian.h>
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+
+#if !defined(__BYTE_ORDER)
+#error "Unknown byte order"
+#endif
+
+#if __BYTE_ORDER == __BIG_ENDIAN
+#define cpu_to_le32(x)	bswap_32(x)
+#define le32_to_cpu(x)	bswap_32(x)
+#elif __BYTE_ORDER == __LITTLE_ENDIAN
+#define cpu_to_le32(x)	(x)
+#define le32_to_cpu(x)	(x)
+#else
+#error "Unsupported endianness"
+#endif
+
+#define TRX_MAGIC			0x30524448
+#define TRX_FLAGS_OFFSET		12
+#define TRX_MAX_PARTS			3
+
+struct trx_header {
+	uint32_t magic;
+	uint32_t length;
+	uint32_t crc32;
+	uint16_t flags;
+	uint16_t version;
+	uint32_t offset[3];
+};
+
+char *trx_path;
+size_t trx_offset = 0;
+char *partition[TRX_MAX_PARTS] = {};
+
+static inline size_t otrx_min(size_t x, size_t y) {
+	return x < y ? x : y;
+}
+
+/**************************************************
+ * CRC32
+ **************************************************/
+
+static const uint32_t crc32_tbl[] = {
+	0x00000000, 0x77073096, 0xee0e612c, 0x990951ba,
+	0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3,
+	0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988,
+	0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91,
+	0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de,
+	0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7,
+	0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec,
+	0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5,
+	0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172,
+	0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b,
+	0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940,
+	0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59,
+	0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116,
+	0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f,
+	0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924,
+	0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d,
+	0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a,
+	0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433,
+	0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818,
+	0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01,
+	0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e,
+	0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457,
+	0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c,
+	0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65,
+	0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2,
+	0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb,
+	0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0,
+	0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9,
+	0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086,
+	0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f,
+	0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4,
+	0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad,
+	0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a,
+	0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683,
+	0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8,
+	0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1,
+	0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe,
+	0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7,
+	0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc,
+	0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5,
+	0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252,
+	0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b,
+	0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60,
+	0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79,
+	0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236,
+	0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f,
+	0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04,
+	0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d,
+	0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a,
+	0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713,
+	0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38,
+	0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21,
+	0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e,
+	0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777,
+	0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c,
+	0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45,
+	0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2,
+	0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db,
+	0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0,
+	0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9,
+	0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6,
+	0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf,
+	0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94,
+	0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d,
+};
+
+uint32_t otrx_crc32(uint32_t crc, uint8_t *buf, size_t len) {
+	while (len) {
+		crc = crc32_tbl[(crc ^ *buf) & 0xff] ^ (crc >> 8);
+		buf++;
+		len--;
+	}
+
+	return crc;
+}
+
+/**************************************************
+ * Check
+ **************************************************/
+
+static void otrx_check_parse_options(int argc, char **argv) {
+	int c;
+
+	while ((c = getopt(argc, argv, "o:")) != -1) {
+		switch (c) {
+		case 'o':
+			trx_offset = atoi(optarg);
+			break;
+		}
+	}
+}
+
+static int otrx_check(int argc, char **argv) {
+	FILE *trx;
+	struct trx_header hdr;
+	size_t bytes, length;
+	uint8_t buf[1024];
+	uint32_t crc32;
+	int err = 0;
+
+	if (argc < 3) {
+		fprintf(stderr, "No TRX file passed\n");
+		err = -EINVAL;
+		goto out;
+	}
+	trx_path = argv[2];
+
+	optind = 3;
+	otrx_check_parse_options(argc, argv);
+
+	trx = fopen(trx_path, "r");
+	if (!trx) {
+		fprintf(stderr, "Couldn't open %s\n", trx_path);
+		err = -EACCES;
+		goto out;
+	}
+
+	fseek(trx, trx_offset, SEEK_SET);
+	bytes = fread(&hdr, 1, sizeof(hdr), trx);
+	if (bytes != sizeof(hdr)) {
+		fprintf(stderr, "Couldn't read %s header\n", trx_path);
+		err =  -EIO;
+		goto err_close;
+	}
+
+	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
+		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
+		err =  -EINVAL;
+		goto err_close;
+	}
+
+	length = le32_to_cpu(hdr.length);
+	if (length < sizeof(hdr)) {
+		fprintf(stderr, "Length read from TRX too low (%zu B)\n", length);
+		err = -EINVAL;
+		goto err_close;
+	}
+
+	crc32 = 0xffffffff;
+	fseek(trx, trx_offset + TRX_FLAGS_OFFSET, SEEK_SET);
+	length -= TRX_FLAGS_OFFSET;
+	while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
+		crc32 = otrx_crc32(crc32, buf, bytes);
+		length -= bytes;
+	}
+
+	if (length) {
+		fprintf(stderr, "Couldn't read last %zd B of data from %s\n", length, trx_path);
+		err = -EIO;
+		goto err_close;
+	}
+
+	if (crc32 != le32_to_cpu(hdr.crc32)) {
+		fprintf(stderr, "Invalid data crc32: 0x%08x instead of 0x%08x\n", crc32, le32_to_cpu(hdr.crc32));
+		err =  -EINVAL;
+		goto err_close;
+	}
+
+	printf("Found a valid TRX version %d\n", le32_to_cpu(hdr.version));
+
+err_close:
+	fclose(trx);
+out:
+	return err;
+}
+
+/**************************************************
+ * Create
+ **************************************************/
+
+static void otrx_create_parse_options(int argc, char **argv) {
+}
+
+static ssize_t otrx_create_append_file(FILE *trx, const char *in_path) {
+	FILE *in;
+	size_t bytes;
+	ssize_t length = 0;
+	uint8_t buf[128];
+
+	in = fopen(in_path, "r");
+	if (!in) {
+		fprintf(stderr, "Couldn't open %s\n", in_path);
+		return -EACCES;
+	}
+
+	while ((bytes = fread(buf, 1, sizeof(buf), in)) > 0) {
+		if (fwrite(buf, 1, bytes, trx) != bytes) {
+			fprintf(stderr, "Couldn't write %zu B to %s\n", bytes, trx_path);
+			length = -EIO;
+			break;
+		}
+		length += bytes;
+	}
+
+	fclose(in);
+
+	return length;
+}
+
+static ssize_t otrx_create_append_zeros(FILE *trx, size_t length) {
+	uint8_t *buf;
+
+	buf = malloc(length);
+	if (!buf)
+		return -ENOMEM;
+	memset(buf, 0, length);
+
+	if (fwrite(buf, 1, length, trx) != length) {
+		fprintf(stderr, "Couldn't write %zu B to %s\n", length, trx_path);
+		return -EIO;
+	}
+
+	return length;
+}
+
+static ssize_t otrx_create_align(FILE *trx, size_t curr_offset, size_t alignment) {
+	if (curr_offset & (alignment - 1)) {
+		size_t length = alignment - (curr_offset % alignment);
+		return otrx_create_append_zeros(trx, length);
+	}
+
+	return 0;
+}
+
+static int otrx_create_write_hdr(FILE *trx, struct trx_header *hdr) {
+	size_t bytes, length;
+	uint8_t buf[1024];
+	uint32_t crc32;
+
+	hdr->magic = cpu_to_le32(TRX_MAGIC);
+	hdr->version = 1;
+
+	fseek(trx, 0, SEEK_SET);
+	bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
+	if (bytes != sizeof(struct trx_header)) {
+		fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
+		return -EIO;
+	}
+
+	length = le32_to_cpu(hdr->length);
+
+	crc32 = 0xffffffff;
+	fseek(trx, TRX_FLAGS_OFFSET, SEEK_SET);
+	length -= TRX_FLAGS_OFFSET;
+	while ((bytes = fread(buf, 1, otrx_min(sizeof(buf), length), trx)) > 0) {
+		crc32 = otrx_crc32(crc32, buf, bytes);
+		length -= bytes;
+	}
+	hdr->crc32 = cpu_to_le32(crc32);
+
+	fseek(trx, 0, SEEK_SET);
+	bytes = fwrite(hdr, 1, sizeof(struct trx_header), trx);
+	if (bytes != sizeof(struct trx_header)) {
+		fprintf(stderr, "Couldn't write TRX header to %s\n", trx_path);
+		return -EIO;
+	}
+
+	return 0;
+}
+
+static int otrx_create(int argc, char **argv) {
+	FILE *trx;
+	struct trx_header hdr = {};
+	ssize_t sbytes;
+	size_t curr_idx = 0;
+	size_t curr_offset = sizeof(hdr);
+	int c;
+	int err = 0;
+
+	if (argc < 3) {
+		fprintf(stderr, "No TRX file passed\n");
+		err = -EINVAL;
+		goto out;
+	}
+	trx_path = argv[2];
+
+	optind = 3;
+	otrx_create_parse_options(argc, argv);
+
+	trx = fopen(trx_path, "w+");
+	if (!trx) {
+		fprintf(stderr, "Couldn't open %s\n", trx_path);
+		err = -EACCES;
+		goto out;
+	}
+	fseek(trx, curr_offset, SEEK_SET);
+
+	optind = 3;
+	while ((c = getopt(argc, argv, "f:A:a:b:")) != -1) {
+		switch (c) {
+		case 'f':
+			if (curr_idx >= TRX_MAX_PARTS) {
+				err = -ENOSPC;
+				fprintf(stderr, "Reached TRX partitions limit, no place for %s\n", optarg);
+				goto err_close;
+			}
+
+			sbytes = otrx_create_append_file(trx, optarg);
+			if (sbytes < 0) {
+				fprintf(stderr, "Failed to append file %s\n", optarg);
+			} else {
+				hdr.offset[curr_idx++] = curr_offset;
+				curr_offset += sbytes;
+			}
+
+			sbytes = otrx_create_align(trx, curr_offset, 4);
+			if (sbytes < 0)
+				fprintf(stderr, "Failed to append zeros\n");
+			else
+				curr_offset += sbytes;
+
+			break;
+		case 'A':
+			sbytes = otrx_create_append_file(trx, optarg);
+			if (sbytes < 0) {
+				fprintf(stderr, "Failed to append file %s\n", optarg);
+			} else {
+				curr_offset += sbytes;
+			}
+
+			sbytes = otrx_create_align(trx, curr_offset, 4);
+			if (sbytes < 0)
+				fprintf(stderr, "Failed to append zeros\n");
+			else
+				curr_offset += sbytes;
+			break;
+		case 'a':
+			sbytes = otrx_create_align(trx, curr_offset, strtol(optarg, NULL, 0));
+			if (sbytes < 0)
+				fprintf(stderr, "Failed to append zeros\n");
+			else
+				curr_offset += sbytes;
+			break;
+		case 'b':
+			sbytes = strtol(optarg, NULL, 0) - curr_offset;
+			if (sbytes < 0) {
+				fprintf(stderr, "Current TRX length is 0x%zx, can't pad it with zeros to 0x%lx\n", curr_offset, strtol(optarg, NULL, 0));
+			} else {
+				sbytes = otrx_create_append_zeros(trx, sbytes);
+				if (sbytes < 0)
+					fprintf(stderr, "Failed to append zeros\n");
+				else
+					curr_offset += sbytes;
+			}
+			break;
+		}
+		if (err)
+			break;
+	}
+
+	sbytes = otrx_create_align(trx, curr_offset, 0x1000);
+	if (sbytes < 0)
+		fprintf(stderr, "Failed to append zeros\n");
+	else
+		curr_offset += sbytes;
+
+	hdr.length = curr_offset;
+	otrx_create_write_hdr(trx, &hdr);
+err_close:
+	fclose(trx);
+out:
+	return err;
+}
+
+/**************************************************
+ * Extract
+ **************************************************/
+
+static void otrx_extract_parse_options(int argc, char **argv) {
+	int c;
+
+	while ((c = getopt(argc, argv, "c:e:o:1:2:3:")) != -1) {
+		switch (c) {
+		case 'o':
+			trx_offset = atoi(optarg);
+			break;
+		case '1':
+			partition[0] = optarg;
+			break;
+		case '2':
+			partition[1] = optarg;
+			break;
+		case '3':
+			partition[2] = optarg;
+			break;
+		}
+	}
+}
+
+static int otrx_extract_copy(FILE *trx, size_t offset, size_t length, char *out_path) {
+	FILE *out;
+	size_t bytes;
+	uint8_t *buf;
+	int err = 0;
+
+	out = fopen(out_path, "w");
+	if (!out) {
+		fprintf(stderr, "Couldn't open %s\n", out_path);
+		err = -EACCES;
+		goto out;
+	}
+
+	buf = malloc(length);
+	if (!buf) {
+		fprintf(stderr, "Couldn't alloc %zu B buffer\n", length);
+		err =  -ENOMEM;
+		goto err_close;
+	}
+
+	fseek(trx, offset, SEEK_SET);
+	bytes = fread(buf, 1, length, trx);
+	if (bytes != length) {
+		fprintf(stderr, "Couldn't read %zu B of data from %s\n", length, trx_path);
+		err =  -ENOMEM;
+		goto err_free_buf;
+	};
+
+	bytes = fwrite(buf, 1, length, out);
+	if (bytes != length) {
+		fprintf(stderr, "Couldn't write %zu B to %s\n", length, out_path);
+		err =  -ENOMEM;
+		goto err_free_buf;
+	}
+
+	printf("Extracted 0x%zx bytes into %s\n", length, out_path);
+
+err_free_buf:
+	free(buf);
+err_close:
+	fclose(out);
+out:
+	return err;
+}
+
+static int otrx_extract(int argc, char **argv) {
+	FILE *trx;
+	struct trx_header hdr;
+	size_t bytes;
+	int i;
+	int err = 0;
+
+	if (argc < 3) {
+		fprintf(stderr, "No TRX file passed\n");
+		err = -EINVAL;
+		goto out;
+	}
+	trx_path = argv[2];
+
+	optind = 3;
+	otrx_extract_parse_options(argc, argv);
+
+	trx = fopen(trx_path, "r");
+	if (!trx) {
+		fprintf(stderr, "Couldn't open %s\n", trx_path);
+		err = -EACCES;
+		goto out;
+	}
+
+	fseek(trx, trx_offset, SEEK_SET);
+	bytes = fread(&hdr, 1, sizeof(hdr), trx);
+	if (bytes != sizeof(hdr)) {
+		fprintf(stderr, "Couldn't read %s header\n", trx_path);
+		err =  -EIO;
+		goto err_close;
+	}
+
+	if (le32_to_cpu(hdr.magic) != TRX_MAGIC) {
+		fprintf(stderr, "Invalid TRX magic: 0x%08x\n", le32_to_cpu(hdr.magic));
+		err =  -EINVAL;
+		goto err_close;
+	}
+
+	for (i = 0; i < TRX_MAX_PARTS; i++) {
+		size_t length;
+
+		if (!partition[i])
+			continue;
+		if (!hdr.offset[i]) {
+			printf("TRX doesn't contain partition %d, can't extract %s\n", i + 1, partition[i]);
+			continue;
+		}
+
+		if (i + 1 >= TRX_MAX_PARTS || !hdr.offset[i + 1])
+			length = le32_to_cpu(hdr.length) - le32_to_cpu(hdr.offset[i]);
+		else
+			length = le32_to_cpu(hdr.offset[i + 1]) - le32_to_cpu(hdr.offset[i]);
+
+		otrx_extract_copy(trx, trx_offset + le32_to_cpu(hdr.offset[i]), length, partition[i]);
+	}
+
+err_close:
+	fclose(trx);
+out:
+	return err;
+}
+
+/**************************************************
+ * Start
+ **************************************************/
+
+static void usage() {
+	printf("Usage:\n");
+	printf("\n");
+	printf("Checking TRX file:\n");
+	printf("\totrx check <file> [options]\tcheck if file is a valid TRX\n");
+	printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
+	printf("\n");
+	printf("Creating new TRX file:\n");
+	printf("\totrx create <file> [options] [partitions]\n");
+	printf("\t-f file\t\t\t\t[partition] start new partition with content copied from file\n");
+	printf("\t-A file\t\t\t\t[partition] append current partition with content copied from file\n");
+	printf("\t-a alignment\t\t\t[partition] align current partition\n");
+	printf("\t-b offset\t\t\t[partition] append zeros to partition till reaching absolute offset\n");
+	printf("\n");
+	printf("Extracting from TRX file:\n");
+	printf("\totrx extract <file> [options]\textract partitions from TRX file\n");
+	printf("\t-o offset\t\t\toffset of TRX data in file (default: 0)\n");
+	printf("\t-1 file\t\t\t\tfile to extract 1st partition to (optional)\n");
+	printf("\t-2 file\t\t\t\tfile to extract 2nd partition to (optional)\n");
+	printf("\t-3 file\t\t\t\tfile to extract 3rd partition to (optional)\n");
+}
+
+int main(int argc, char **argv) {
+	if (argc > 1) {
+		if (!strcmp(argv[1], "check"))
+			return otrx_check(argc, argv);
+		else if (!strcmp(argv[1], "create"))
+			return otrx_create(argc, argv);
+		else if (!strcmp(argv[1], "extract"))
+			return otrx_extract(argc, argv);
+	}
+
+	usage();
+	return 0;
+}