Created
September 19, 2011 12:03
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Allow you to print (binary) files in a formated and readable output
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/* | |
* Copyright (C) 2006, 2007 Sarzyniec Luc <mail@olbat.net> | |
* | |
* 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 3 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, see <http://www.gnu.org/licenses/>. | |
* | |
* see the COPYING file for more informations */ | |
#include <fcntl.h> | |
#include <unistd.h> | |
#include <signal.h> | |
#include <stdio.h> | |
#include <stdlib.h> | |
#include <string.h> | |
#define PRINT_FORMAT "%.2x" | |
#define PRINT_DISPLAY(F,C) __extension__ \ | |
({ \ | |
printf(F,C); \ | |
fflush(stdout); \ | |
}) | |
static int fd; | |
void stop(int no) | |
{ | |
close(fd); | |
} | |
int main(int argc, char **argv) | |
{ | |
if (argc > 3) | |
{ | |
unsigned char c; | |
int nbytes; | |
ssize_t len; | |
__extension__ char format[ | |
strlen(*(argv + 2)) + sizeof(PRINT_FORMAT) + 1 | |
]; | |
signal(SIGHUP,stop); | |
signal(SIGTERM,stop); | |
signal(SIGINT,stop); | |
fd = open(*(argv + 1), O_RDONLY); | |
nbytes = atoi(*(argv + 2)); | |
strcpy(format,*(argv + 3)); | |
strcat(format,PRINT_FORMAT); | |
if (nbytes > 0) | |
{ | |
while ((read(fd,&c,sizeof(c) > 0)) && (nbytes-- > 0)) | |
PRINT_DISPLAY(format,c); | |
close(fd); | |
} | |
else | |
{ | |
while (read(fd,&c,sizeof(c)) > 0) | |
PRINT_DISPLAY(format,c); | |
} | |
puts(""); | |
} | |
else | |
{ | |
printf("usage: %s <file> <bytes to be read > <prefix format>\n" | |
,*argv); | |
} | |
return 0; | |
} |
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