1 #include <stdio.h>
2 
3 /* I need a big file made up of ascii characters.  dd if=/dev/zero is
4  * thus not an option, truncate is not portable.  This is some order
5  * of magnitude faster than the equivalent sh script */
6 
7 int
8 main(int argc, char **argv)
9 {
10 	FILE *out;
11 	int i, j;
12 
13 	if (argc != 2) {
14 		fprintf(stderr, "USAGE: %s <file>\n", *argv);
15 		return 1;
16 	}
17 
18 	if ((out = fopen(argv[1], "w")) == NULL) {
19 		fprintf(stderr, "cannot open file: %s\n", argv[1]);
20 		return 1;
21 	}
22 
23 	for (i = 0; i < 1024; ++i)
24 		for (j = 0; j < 1024; ++j)
25 			fprintf(out, "a\n");
26 
27 	fclose(out);
28 	return 0;
29 }