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DEFINITIONS
This source file includes following definitions.
- main
1 /*
2 * Copyright (c) 2000, 2001, 2002, 2003, 2004, 2005, 2008, 2009
3 * The President and Fellows of Harvard College.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. Neither the name of the University nor the names of its contributors
14 * may be used to endorse or promote products derived from this software
15 * without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE UNIVERSITY AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE UNIVERSITY OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30 /*
31 * Create a large file in small increments.
32 *
33 * Should work on emufs (emu0:) once the basic system calls are done,
34 * and should work on SFS when the file system assignment is
35 * done. Sufficiently small files should work on SFS even before that
36 * assignment.
37 */
38
39 #include <stdlib.h>
40 #include <stdio.h>
41 #include <string.h>
42 #include <unistd.h>
43 #include <err.h>
44
45 static char buffer[100];
46
47 int
48 main(int argc, char *argv[])
49 {
50 const char *filename;
51 int i, size;
52 int fileid;
53 int len;
54
55 if (argc != 3) {
56 errx(1, "Usage: bigfile <filename> <size>");
57 }
58
59 filename = argv[1];
60 size = atoi(argv[2]);
61
62 printf("Creating a file of size %d\n", size);
63
64 fileid = open(filename, O_WRONLY|O_CREAT|O_TRUNC);
65 if (fileid < 0) {
66 err(1, "%s: create", filename);
67 }
68
69 i=0;
70 while (i<size) {
71 snprintf(buffer, sizeof(buffer), "%-10d", i);
72 len = write(fileid, buffer, strlen(buffer));
73 if (len<0) {
74 err(1, "%s: write", filename);
75 }
76 i += len;
77 }
78
79 close(fileid);
80
81 return 0;
82 }