2 * Copyright (c) 2007 Michael Niedermayer
4 * This file is part of FFmpeg.
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21 #define _XOPEN_SOURCE 600
27 int main(int argc, char** argv)
30 int count, maxburst, length;
33 printf("USAGE: trasher <filename> <count> <maxburst>\n");
37 f= fopen(argv[1], "rb+");
43 maxburst= atoi(argv[3]);
47 fseek(f, 0, SEEK_END);
49 fseek(f, 0, SEEK_SET);
52 int burst= 1 + random() * (uint64_t) (abs(maxburst)-1) / RAND_MAX;
53 int pos= random() * (uint64_t) length / RAND_MAX;
54 fseek(f, pos, SEEK_SET);
56 if(maxburst<0) burst= -maxburst;
58 if(pos + burst > length)
62 int val= random() * 256ULL / RAND_MAX;
66 fwrite(&val, 1, 1, f);