1 /* 2 * Copyright 2014 The Chromium OS Authors. All rights reserved. 3 * Use of this source code is governed by a BSD-style license that can be 4 * found in the LICENSE file. 5 * 6 * This is a very simple binary editor, used to create corrupted structs for 7 * testing. It copies stdin to stdout, replacing bytes beginning at the given 8 * offset with the specified 8-bit values. 9 * 10 * There is NO conversion checking of the arguments. 11 */ 12 13 #include <stdint.h> 14 #include <stdio.h> 15 #include <stdlib.h> 16 17 int main(int argc, char *argv[]) 18 { 19 uint32_t offset, curpos, curarg; 20 int c; 21 22 if (argc < 3) { 23 fprintf(stderr, "Need two or more args: OFFSET VAL [VAL...]\n"); 24 return 1; 25 } 26 27 offset = (uint32_t)strtoul(argv[1], 0, 0); 28 curarg = 2; 29 for ( curpos = 0; (c = fgetc(stdin)) != EOF; curpos++) { 30 31 if (curpos == offset && curarg < argc) { 32 c = (uint8_t)strtoul(argv[curarg++], 0, 0); 33 offset++; 34 } 35 36 fputc(c, stdout); 37 } 38 return 0; 39 } 40
