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

 /*
  * Copyright (c) 2d3D, Inc.
  * Written by Abraham vd Merwe <abraham@2d3d.co.za>
  * All rights reserved.
  *
  * Renamed to flashcp.c to avoid conflicts with fcp from fsh package
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *	  notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *	  notice, this list of conditions and the following disclaimer in the
  *	  documentation and/or other materials provided with the distribution.
  * 3. Neither the name of the author nor the names of other contributors
  *	  may be used to endorse or promote products derived from this software
  *	  without specific prior written permission.
  *
  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
  * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */

 #define PROGRAM_NAME "flashcp"

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

 typedef int bool;
 #define true 1
 #define false 0

 #define EXIT_FAILURE 1
 #define EXIT_SUCCESS 0

 /* for debugging purposes only */
 #ifdef DEBUG
 #undef DEBUG
 #define DEBUG(fmt,args...) { log_printf (LOG_ERROR,"%d: ",__LINE__); log_printf (LOG_ERROR,fmt,## args); }
 #else
 #undef DEBUG
 #define DEBUG(fmt,args...)
 #endif

 #define KB(x) ((x) / 1024)
 #define PERCENTAGE(x,total) (((x) * 100) / (total))

 /* size of read/write buffer */
 #define BUFSIZE (10 * 1024)

 /* cmd-line flags */
 #define FLAG_NONE		0x00
 #define FLAG_VERBOSE	0x01
 #define FLAG_HELP		0x02
 #define FLAG_FILENAME	0x04
 #define FLAG_DEVICE		0x08

 /* error levels */
 #define LOG_NORMAL	1
 #define LOG_ERROR	2

 static void log_printf (int level,const char *fmt, ...)
 {
 	FILE *fp = level == LOG_NORMAL ? stdout : stderr;
 	va_list ap;
 	va_start (ap,fmt);
 	vfprintf (fp,fmt,ap);
 	va_end (ap);
 	fflush (fp);
 }

 static void showusage(bool error)
 {
 	int level = error ? LOG_ERROR : LOG_NORMAL;

 	log_printf (level,
 			"\n"
 			"Flash Copy - Written by Abraham van der Merwe <abraham@2d3d.co.za>\n"
 			"\n"
 			"usage: %1$s [ -v | --verbose ] <filename> <device>\n"
 			"       %1$s -h | --help\n"
 			"\n"
 			"   -h | --help      Show this help message\n"
 			"   -v | --verbose   Show progress reports\n"
 			"   <filename>       File which you want to copy to flash\n"
 			"   <device>         Flash device to write to (e.g. /dev/mtd0, /dev/mtd1, etc.)\n"
 			"\n",
 			PROGRAM_NAME);

 	exit (error ? EXIT_FAILURE : EXIT_SUCCESS);
 }

 static int safe_open (const char *pathname,int flags)
 {
 	int fd;

 	fd = open (pathname,flags);
 	if (fd < 0)
 	{
 		log_printf (LOG_ERROR,"While trying to open %s",pathname);
 		if (flags & O_RDWR)
 			log_printf (LOG_ERROR," for read/write access");
 		else if (flags & O_RDONLY)
 			log_printf (LOG_ERROR," for read access");
 		else if (flags & O_WRONLY)
 			log_printf (LOG_ERROR," for write access");
 		log_printf (LOG_ERROR,": %m\n");
 		exit (EXIT_FAILURE);
 	}

 	return (fd);
 }

 static void safe_read (int fd,const char *filename,void *buf,size_t count,bool verbose)
 {
 	ssize_t result;

 	result = read (fd,buf,count);
 	if (count != result)
 	{
 		if (verbose) log_printf (LOG_NORMAL,"\n");
 		if (result < 0)
 		{
 			log_printf (LOG_ERROR,"While reading data from %s: %m\n",filename);
 			exit (EXIT_FAILURE);
 		}
 		log_printf (LOG_ERROR,"Short read count returned while reading from %s\n",filename);
 		exit (EXIT_FAILURE);
 	}
 }

 static void safe_rewind (int fd,const char *filename)
 {
 	if (lseek (fd,0L,SEEK_SET) < 0)
 	{
 		log_printf (LOG_ERROR,"While seeking to start of %s: %m\n",filename);
 		exit (EXIT_FAILURE);
 	}
 }

 /******************************************************************************/

 static int dev_fd = -1,fil_fd = -1;

 static void cleanup (void)
 {
 	if (dev_fd > 0) close (dev_fd);
 	if (fil_fd > 0) close (fil_fd);
 }

 int main (int argc,char *argv[])
 {
 	const char *filename = NULL,*device = NULL;
 	int i,flags = FLAG_NONE;
 	ssize_t result;
 	size_t size,written;
 	struct mtd_info_user mtd;
 	struct erase_info_user erase;
 	struct stat filestat;
 	unsigned char src[BUFSIZE],dest[BUFSIZE];

 	/*********************
 	 * parse cmd-line
 	 *****************/

 	for (;;) {
 		int option_index = 0;
 		static const char *short_options = "hv";
 		static const struct option long_options[] = {
 			{"help", no_argument, 0, 'h'},
 			{"verbose", no_argument, 0, 'v'},
 			{0, 0, 0, 0},
 		};

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

 		switch (c) {
 			case 'h':
 				flags |= FLAG_HELP;
 				DEBUG("Got FLAG_HELP\n");
 				break;
 			case 'v':
 				flags |= FLAG_VERBOSE;
 				DEBUG("Got FLAG_VERBOSE\n");
 				break;
 			default:
 				DEBUG("Unknown parameter: %s\n",argv[option_index]);
 				showusage(true);
 		}
 	}
 	if (optind+2 == argc) {
 		flags |= FLAG_FILENAME;
 		filename = argv[optind];
 		DEBUG("Got filename: %s\n",filename);

 		flags |= FLAG_DEVICE;
 		device = argv[optind+1];
 		DEBUG("Got device: %s\n",device);
 	}

 	if (flags & FLAG_HELP || device == NULL)
 		showusage(flags != FLAG_HELP);

 	atexit (cleanup);

 	/* get some info about the flash device */
 	dev_fd = safe_open (device,O_SYNC | O_RDWR);
 	if (ioctl (dev_fd,MEMGETINFO,&mtd) < 0)
 	{
 		DEBUG("ioctl(): %m\n");
 		log_printf (LOG_ERROR,"This doesn't seem to be a valid MTD flash device!\n");
 		exit (EXIT_FAILURE);
 	}

 	/* get some info about the file we want to copy */
 	fil_fd = safe_open (filename,O_RDONLY);
 	if (fstat (fil_fd,&filestat) < 0)
 	{
 		log_printf (LOG_ERROR,"While trying to get the file status of %s: %m\n",filename);
 		exit (EXIT_FAILURE);
 	}

 	/* does it fit into the device/partition? */
 	if (filestat.st_size > mtd.size)
 	{
 		log_printf (LOG_ERROR,"%s won't fit into %s!\n",filename,device);
 		exit (EXIT_FAILURE);
 	}

 	/*****************************************************
 	 * erase enough blocks so that we can write the file *
 	 *****************************************************/

 #warning "Check for smaller erase regions"

 	erase.start = 0;
 	erase.length = (filestat.st_size + mtd.erasesize - 1) / mtd.erasesize;
 	erase.length *= mtd.erasesize;

 	if (flags & FLAG_VERBOSE)
 	{
 		/* if the user wants verbose output, erase 1 block at a time and show him/her what's going on */
 		int blocks = erase.length / mtd.erasesize;
 		erase.length = mtd.erasesize;
 		log_printf (LOG_NORMAL,"Erasing blocks: 0/%d (0%%)",blocks);
 		for (i = 1; i <= blocks; i++)
 		{
 			log_printf (LOG_NORMAL,"\rErasing blocks: %d/%d (%d%%)",i,blocks,PERCENTAGE (i,blocks));
 			if (ioctl (dev_fd,MEMERASE,&erase) < 0)
 			{
 				log_printf (LOG_NORMAL,"\n");
 				log_printf (LOG_ERROR,
 						"While erasing blocks 0x%.8x-0x%.8x on %s: %m\n",
 						(unsigned int) erase.start,(unsigned int) (erase.start + erase.length),device);
 				exit (EXIT_FAILURE);
 			}
 			erase.start += mtd.erasesize;
 		}
 		log_printf (LOG_NORMAL,"\rErasing blocks: %d/%d (100%%)\n",blocks,blocks);
 	}
 	else
 	{
 		/* if not, erase the whole chunk in one shot */
 		if (ioctl (dev_fd,MEMERASE,&erase) < 0)
 		{
 			log_printf (LOG_ERROR,
 					"While erasing blocks from 0x%.8x-0x%.8x on %s: %m\n",
 					(unsigned int) erase.start,(unsigned int) (erase.start + erase.length),device);
 			exit (EXIT_FAILURE);
 		}
 	}
 	DEBUG("Erased %u / %luk bytes\n",erase.length,filestat.st_size);

 	/**********************************
 	 * write the entire file to flash *
 	 **********************************/

 	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"Writing data: 0k/%luk (0%%)",KB (filestat.st_size));
 	size = filestat.st_size;
 	i = BUFSIZE;
 	written = 0;
 	while (size)
 	{
 		if (size < BUFSIZE) i = size;
 		if (flags & FLAG_VERBOSE)
 			log_printf (LOG_NORMAL,"\rWriting data: %dk/%luk (%lu%%)",
 					KB (written + i),
 					KB (filestat.st_size),
 					PERCENTAGE (written + i,filestat.st_size));

 		/* read from filename */
 		safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE);

 		/* write to device */
 		result = write (dev_fd,src,i);
 		if (i != result)
 		{
 			if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"\n");
 			if (result < 0)
 			{
 				log_printf (LOG_ERROR,
 						"While writing data to 0x%.8x-0x%.8x on %s: %m\n",
 						written,written + i,device);
 				exit (EXIT_FAILURE);
 			}
 			log_printf (LOG_ERROR,
 					"Short write count returned while writing to x%.8x-0x%.8x on %s: %d/%lu bytes written to flash\n",
 					written,written + i,device,written + result,filestat.st_size);
 			exit (EXIT_FAILURE);
 		}

 		written += i;
 		size -= i;
 	}
 	if (flags & FLAG_VERBOSE)
 		log_printf (LOG_NORMAL,
 				"\rWriting data: %luk/%luk (100%%)\n",
 				KB (filestat.st_size),
 				KB (filestat.st_size));
 	DEBUG("Wrote %d / %luk bytes\n",written,filestat.st_size);

 	/**********************************
 	 * verify that flash == file data *
 	 **********************************/

 	safe_rewind (fil_fd,filename);
 	safe_rewind (dev_fd,device);
 	size = filestat.st_size;
 	i = BUFSIZE;
 	written = 0;
 	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"Verifying data: 0k/%luk (0%%)",KB (filestat.st_size));
 	while (size)
 	{
 		if (size < BUFSIZE) i = size;
 		if (flags & FLAG_VERBOSE)
 			log_printf (LOG_NORMAL,
 					"\rVerifying data: %dk/%luk (%lu%%)",
 					KB (written + i),
 					KB (filestat.st_size),
 					PERCENTAGE (written + i,filestat.st_size));

 		/* read from filename */
 		safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE);

 		/* read from device */
 		safe_read (dev_fd,device,dest,i,flags & FLAG_VERBOSE);

 		/* compare buffers */
 		if (memcmp (src,dest,i))
 		{
 			log_printf (LOG_ERROR,
 					"File does not seem to match flash data. First mismatch at 0x%.8x-0x%.8x\n",
 					written,written + i);
 			exit (EXIT_FAILURE);
 		}

 		written += i;
 		size -= i;
 	}
 	if (flags & FLAG_VERBOSE)
 		log_printf (LOG_NORMAL,
 				"\rVerifying data: %luk/%luk (100%%)\n",
 				KB (filestat.st_size),
 				KB (filestat.st_size));
 	DEBUG("Verified %d / %luk bytes\n",written,filestat.st_size);

 	exit (EXIT_SUCCESS);
 }
	/*
	* Copyright (c) 2d3D, Inc.
	* Written by Abraham vd Merwe <abraham@2d3d.co.za>
	* All rights reserved.
	*
	* Renamed to flashcp.c to avoid conflicts with fcp from fsh package
	*
	* Redistribution and use in source and binary forms, with or without
	* modification, are permitted provided that the following conditions
	* are met:
	* 1. Redistributions of source code must retain the above copyright
	* notice, this list of conditions and the following disclaimer.
	* 2. Redistributions in binary form must reproduce the above copyright
	* notice, this list of conditions and the following disclaimer in the
	* documentation and/or other materials provided with the distribution.
	* 3. Neither the name of the author nor the names of other contributors
	* may be used to endorse or promote products derived from this software
	* without specific prior written permission.
	*
	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
	* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
	* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
	* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
	* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
	* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
	*/

	#define PROGRAM_NAME "flashcp"

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

	typedef int bool;
	#define true 1
	#define false 0

	#define EXIT_FAILURE 1
	#define EXIT_SUCCESS 0

	/* for debugging purposes only */
	#ifdef DEBUG
	#undef DEBUG
	#define DEBUG(fmt,args...) { log_printf (LOG_ERROR,"%d: ",__LINE__); log_printf (LOG_ERROR,fmt,## args); }
	#else
	#undef DEBUG
	#define DEBUG(fmt,args...)
	#endif

	#define KB(x) ((x) / 1024)
	#define PERCENTAGE(x,total) (((x) * 100) / (total))

	/* size of read/write buffer */
	#define BUFSIZE (10 * 1024)

	/* cmd-line flags */
	#define FLAG_NONE 0x00
	#define FLAG_VERBOSE 0x01
	#define FLAG_HELP 0x02
	#define FLAG_FILENAME 0x04
	#define FLAG_DEVICE 0x08

	/* error levels */
	#define LOG_NORMAL 1
	#define LOG_ERROR 2

	static void log_printf (int level,const char *fmt, ...)
	{
	FILE *fp = level == LOG_NORMAL ? stdout : stderr;
	va_list ap;
	va_start (ap,fmt);
	vfprintf (fp,fmt,ap);
	va_end (ap);
	fflush (fp);
	}

	static void showusage(bool error)
	{
	int level = error ? LOG_ERROR : LOG_NORMAL;

	log_printf (level,
	"\n"
	"Flash Copy - Written by Abraham van der Merwe <abraham@2d3d.co.za>\n"
	"\n"
	"usage: %1$s [ -v \| --verbose ] <filename> <device>\n"
	" %1$s -h \| --help\n"
	"\n"
	" -h \| --help Show this help message\n"
	" -v \| --verbose Show progress reports\n"
	" <filename> File which you want to copy to flash\n"
	" <device> Flash device to write to (e.g. /dev/mtd0, /dev/mtd1, etc.)\n"
	"\n",
	PROGRAM_NAME);

	exit (error ? EXIT_FAILURE : EXIT_SUCCESS);
	}

	static int safe_open (const char *pathname,int flags)
	{
	int fd;

	fd = open (pathname,flags);
	if (fd < 0)
	{
	log_printf (LOG_ERROR,"While trying to open %s",pathname);
	if (flags & O_RDWR)
	log_printf (LOG_ERROR," for read/write access");
	else if (flags & O_RDONLY)
	log_printf (LOG_ERROR," for read access");
	else if (flags & O_WRONLY)
	log_printf (LOG_ERROR," for write access");
	log_printf (LOG_ERROR,": %m\n");
	exit (EXIT_FAILURE);
	}

	return (fd);
	}

	static void safe_read (int fd,const char filename,void buf,size_t count,bool verbose)
	{
	ssize_t result;

	result = read (fd,buf,count);
	if (count != result)
	{
	if (verbose) log_printf (LOG_NORMAL,"\n");
	if (result < 0)
	{
	log_printf (LOG_ERROR,"While reading data from %s: %m\n",filename);
	exit (EXIT_FAILURE);
	}
	log_printf (LOG_ERROR,"Short read count returned while reading from %s\n",filename);
	exit (EXIT_FAILURE);
	}
	}

	static void safe_rewind (int fd,const char *filename)
	{
	if (lseek (fd,0L,SEEK_SET) < 0)
	{
	log_printf (LOG_ERROR,"While seeking to start of %s: %m\n",filename);
	exit (EXIT_FAILURE);
	}
	}

	/******************************************************************************/

	static int dev_fd = -1,fil_fd = -1;

	static void cleanup (void)
	{
	if (dev_fd > 0) close (dev_fd);
	if (fil_fd > 0) close (fil_fd);
	}

	int main (int argc,char *argv[])
	{
	const char filename = NULL,device = NULL;
	int i,flags = FLAG_NONE;
	ssize_t result;
	size_t size,written;
	struct mtd_info_user mtd;
	struct erase_info_user erase;
	struct stat filestat;
	unsigned char src[BUFSIZE],dest[BUFSIZE];

	/*********************
	* parse cmd-line
	*****************/

	for (;;) {
	int option_index = 0;
	static const char *short_options = "hv";
	static const struct option long_options[] = {
	{"help", no_argument, 0, 'h'},
	{"verbose", no_argument, 0, 'v'},
	{0, 0, 0, 0},
	};

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

	switch (c) {
	case 'h':
	flags \|= FLAG_HELP;
	DEBUG("Got FLAG_HELP\n");
	break;
	case 'v':
	flags \|= FLAG_VERBOSE;
	DEBUG("Got FLAG_VERBOSE\n");
	break;
	default:
	DEBUG("Unknown parameter: %s\n",argv[option_index]);
	showusage(true);
	}
	}
	if (optind+2 == argc) {
	flags \|= FLAG_FILENAME;
	filename = argv[optind];
	DEBUG("Got filename: %s\n",filename);

	flags \|= FLAG_DEVICE;
	device = argv[optind+1];
	DEBUG("Got device: %s\n",device);
	}

	if (flags & FLAG_HELP \|\| device == NULL)
	showusage(flags != FLAG_HELP);

	atexit (cleanup);

	/* get some info about the flash device */
	dev_fd = safe_open (device,O_SYNC \| O_RDWR);
	if (ioctl (dev_fd,MEMGETINFO,&mtd) < 0)
	{
	DEBUG("ioctl(): %m\n");
	log_printf (LOG_ERROR,"This doesn't seem to be a valid MTD flash device!\n");
	exit (EXIT_FAILURE);
	}

	/* get some info about the file we want to copy */
	fil_fd = safe_open (filename,O_RDONLY);
	if (fstat (fil_fd,&filestat) < 0)
	{
	log_printf (LOG_ERROR,"While trying to get the file status of %s: %m\n",filename);
	exit (EXIT_FAILURE);
	}

	/* does it fit into the device/partition? */
	if (filestat.st_size > mtd.size)
	{
	log_printf (LOG_ERROR,"%s won't fit into %s!\n",filename,device);
	exit (EXIT_FAILURE);
	}

	/*****************************************************
	* erase enough blocks so that we can write the file *
	*****************************************************/

	#warning "Check for smaller erase regions"

	erase.start = 0;
	erase.length = (filestat.st_size + mtd.erasesize - 1) / mtd.erasesize;
	erase.length *= mtd.erasesize;

	if (flags & FLAG_VERBOSE)
	{
	/* if the user wants verbose output, erase 1 block at a time and show him/her what's going on */
	int blocks = erase.length / mtd.erasesize;
	erase.length = mtd.erasesize;
	log_printf (LOG_NORMAL,"Erasing blocks: 0/%d (0%%)",blocks);
	for (i = 1; i <= blocks; i++)
	{
	log_printf (LOG_NORMAL,"\rErasing blocks: %d/%d (%d%%)",i,blocks,PERCENTAGE (i,blocks));
	if (ioctl (dev_fd,MEMERASE,&erase) < 0)
	{
	log_printf (LOG_NORMAL,"\n");
	log_printf (LOG_ERROR,
	"While erasing blocks 0x%.8x-0x%.8x on %s: %m\n",
	(unsigned int) erase.start,(unsigned int) (erase.start + erase.length),device);
	exit (EXIT_FAILURE);
	}
	erase.start += mtd.erasesize;
	}
	log_printf (LOG_NORMAL,"\rErasing blocks: %d/%d (100%%)\n",blocks,blocks);
	}
	else
	{
	/* if not, erase the whole chunk in one shot */
	if (ioctl (dev_fd,MEMERASE,&erase) < 0)
	{
	log_printf (LOG_ERROR,
	"While erasing blocks from 0x%.8x-0x%.8x on %s: %m\n",
	(unsigned int) erase.start,(unsigned int) (erase.start + erase.length),device);
	exit (EXIT_FAILURE);
	}
	}
	DEBUG("Erased %u / %luk bytes\n",erase.length,filestat.st_size);

	/**********************************
	* write the entire file to flash *
	**********************************/

	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"Writing data: 0k/%luk (0%%)",KB (filestat.st_size));
	size = filestat.st_size;
	i = BUFSIZE;
	written = 0;
	while (size)
	{
	if (size < BUFSIZE) i = size;
	if (flags & FLAG_VERBOSE)
	log_printf (LOG_NORMAL,"\rWriting data: %dk/%luk (%lu%%)",
	KB (written + i),
	KB (filestat.st_size),
	PERCENTAGE (written + i,filestat.st_size));

	/* read from filename */
	safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE);

	/* write to device */
	result = write (dev_fd,src,i);
	if (i != result)
	{
	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"\n");
	if (result < 0)
	{
	log_printf (LOG_ERROR,
	"While writing data to 0x%.8x-0x%.8x on %s: %m\n",
	written,written + i,device);
	exit (EXIT_FAILURE);
	}
	log_printf (LOG_ERROR,
	"Short write count returned while writing to x%.8x-0x%.8x on %s: %d/%lu bytes written to flash\n",
	written,written + i,device,written + result,filestat.st_size);
	exit (EXIT_FAILURE);
	}

	written += i;
	size -= i;
	}
	if (flags & FLAG_VERBOSE)
	log_printf (LOG_NORMAL,
	"\rWriting data: %luk/%luk (100%%)\n",
	KB (filestat.st_size),
	KB (filestat.st_size));
	DEBUG("Wrote %d / %luk bytes\n",written,filestat.st_size);

	/**********************************
	* verify that flash == file data *
	**********************************/

	safe_rewind (fil_fd,filename);
	safe_rewind (dev_fd,device);
	size = filestat.st_size;
	i = BUFSIZE;
	written = 0;
	if (flags & FLAG_VERBOSE) log_printf (LOG_NORMAL,"Verifying data: 0k/%luk (0%%)",KB (filestat.st_size));
	while (size)
	{
	if (size < BUFSIZE) i = size;
	if (flags & FLAG_VERBOSE)
	log_printf (LOG_NORMAL,
	"\rVerifying data: %dk/%luk (%lu%%)",
	KB (written + i),
	KB (filestat.st_size),
	PERCENTAGE (written + i,filestat.st_size));

	/* read from filename */
	safe_read (fil_fd,filename,src,i,flags & FLAG_VERBOSE);

	/* read from device */
	safe_read (dev_fd,device,dest,i,flags & FLAG_VERBOSE);

	/* compare buffers */
	if (memcmp (src,dest,i))
	{
	log_printf (LOG_ERROR,
	"File does not seem to match flash data. First mismatch at 0x%.8x-0x%.8x\n",
	written,written + i);
	exit (EXIT_FAILURE);
	}

	written += i;
	size -= i;
	}
	if (flags & FLAG_VERBOSE)
	log_printf (LOG_NORMAL,
	"\rVerifying data: %luk/%luk (100%%)\n",
	KB (filestat.st_size),
	KB (filestat.st_size));
	DEBUG("Verified %d / %luk bytes\n",written,filestat.st_size);

	exit (EXIT_SUCCESS);
	}