67 lines
1.5 KiB
C
67 lines
1.5 KiB
C
/*
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* fdcat - cat reimplementation
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* Copyright (c) 2006 Sam Hocevar <sam@zoy.org>
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* All Rights Reserved
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*
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* $Id$
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*
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* This program is free software. It comes without any warranty, to
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* the extent permitted by applicable law. You can redistribute it
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* and/or modify it under the terms of the Do What The Fuck You Want
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* To Public License, Version 2, as published by Sam Hocevar. See
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* http://sam.zoy.org/wtfpl/COPYING for more details.
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*/
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#include "config.h"
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#define _LARGEFILE64_SOURCE /* for lseek64() */
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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int main(int argc, char *argv[])
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{
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long int pos;
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unsigned char *data;
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int i, j, fd;
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srand(0);
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if(argc != 2)
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return EXIT_FAILURE;
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fd = open(argv[1], O_RDONLY);
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if(fd < 0)
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return EXIT_FAILURE;
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pos = lseek(fd, 0, SEEK_END);
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if(pos < 0)
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return EXIT_FAILURE;
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/* Read the whole file */
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data = malloc(pos);
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lseek(fd, 0, SEEK_SET);
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read(fd, data, pos);
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/* Read shit here and there */
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for(i = 0; i < 128; i++)
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{
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lseek(fd, rand() % pos, SEEK_SET);
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for(j = 0; j < 16; j++)
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read(fd, data + lseek(fd, 0, SEEK_CUR), rand() % 4096);
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lseek64(fd, rand() % pos, SEEK_SET);
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for(j = 0; j < 16; j++)
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read(fd, data + lseek(fd, 0, SEEK_CUR), rand() % 4096);
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}
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fwrite(data, pos, 1, stdout);
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return EXIT_SUCCESS;
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}
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