46 lines
1.1 KiB
C
46 lines
1.1 KiB
C
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/* Trivia program to corrupt an RDB file in order to check the RDB check
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* program behavior and effectiveness.
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*
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* Copyright (C) 2016 Salvatore Sanfilippo.
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* This software is released in the 3-clause BSD license. */
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#include <stdio.h>
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#include <fcntl.h>
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#include <sys/stat.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <time.h>
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int main(int argc, char **argv) {
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struct stat stat;
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int fd, cycles;
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if (argc != 3) {
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fprintf(stderr,"Usage: <filename> <cycles>\n");
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exit(1);
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}
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srand(time(NULL));
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char *filename = argv[1];
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cycles = atoi(argv[2]);
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fd = open(filename,O_RDWR);
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if (fd == -1) {
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perror("open");
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exit(1);
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}
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fstat(fd,&stat);
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while(cycles--) {
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unsigned char buf[32];
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unsigned long offset = rand()%stat.st_size;
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int writelen = 1+rand()%31;
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int j;
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for (j = 0; j < writelen; j++) buf[j] = (char)rand();
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lseek(fd,offset,SEEK_SET);
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printf("Writing %d bytes at offset %lu\n", writelen, offset);
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write(fd,buf,writelen);
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}
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return 0;
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}
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