1/*-
2 * Copyright (c) 2008 Peter Holm <pho@FreeBSD.org>
3 * All rights reserved.
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 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 *
26 */
27
28#include <sys/types.h>
29#include <sys/errno.h>
30#include <sys/param.h>
31#include <sys/stat.h>
32#include <sys/sysctl.h>
33
34#include <err.h>
35#include <fcntl.h>
36#include <stdio.h>
37#include <stdlib.h>
38#include <string.h>
39#include <unistd.h>
40
41extern char *optarg;
42static pid_t pid;
43static int edirs, dirs, files, fs;
44static int max, rnd;
45static char *buffer;
46static char here[MAXPATHLEN + 1];
47
48static void
49mkDir2(char *path) {
50	int fd, i, j, len;
51	char newPath[MAXPATHLEN + 1];
52	char file[128];
53
54	if (mkdir(path, 0700) == -1)
55		err(1, "mkdir(%s)", path);
56	if (chdir(path) == -1)
57		err(1, "chdir(%s) @ %d", path, __LINE__);
58
59	for (i = 0; i < max; i++) {
60		sprintf(newPath,"d%d", i);
61		if (mkdir(newPath, 0700) == -1)
62			err(1, "mkdir(%s) @ %d", newPath, __LINE__);
63		if (chdir(newPath) == -1)
64			err(1, "chdir(%s) @ %d", newPath, __LINE__);
65
66		len = fs;
67		for (j = 0; j <  files; j++) {
68			if (rnd)
69				len = arc4random() % fs + 1;
70			sprintf(file,"f%05d", j);
71			if ((fd = creat(file, 0660)) == -1) {
72				if (errno != EINTR) {
73					err(1, "%d: creat(%s)", j, file);
74					break;
75				}
76			}
77			if (write(fd, buffer, len) != len)
78				err(1, "%d: write(%s), %s:%d", j, file, __FILE__, __LINE__);
79
80			if (fd != -1 && close(fd) == -1)
81				err(2, "%d: close(%d)", j, j);
82
83		}
84		for (j = 0; j <  edirs; j++) {
85			sprintf(newPath,"e%d", j);
86			if (mkdir(newPath, 0700) == -1)
87				err(1, "mkdir(%s) @ %d", newPath, __LINE__);
88		}
89	}
90	chdir(here);
91}
92
93static void
94mkDir(void) {
95	int i;
96	char path[MAXPATHLEN + 1];
97
98	for (i = 0; i < dirs; i++) {
99		sprintf(path,"fstool.%06d.%d", pid, i);
100		mkDir2(path);
101	}
102}
103
104static void
105rmFile(void)
106{
107	int j;
108	char file[128], newPath[128];
109
110	for (j = 0; j <  files; j++) {
111		sprintf(file,"f%05d", j);
112		(void) unlink(file);
113	}
114	for (j = 0; j <  edirs; j++) {
115		sprintf(newPath,"e%d", j);
116		if (rmdir(newPath) == -1)
117			err(1, "rmdir(%s) @ %d", newPath, __LINE__);
118	}
119}
120
121static void
122rmDir2(char *path) {
123	int i, j;
124	char newPath[10];
125
126	if (chdir(path) == -1)
127		err(1, "chdir(%s)", path);
128
129	for (i = 0; i < max; i++) {
130		sprintf(newPath,"d%d", i);
131		if (chdir(newPath) == -1)
132			err(1, "chdir(%s)", newPath);
133	}
134	for (j = 0; j < max; j++) {
135		rmFile();
136		if (chdir ("..") == -1)
137			err(1, "chdir(\"..\")");
138		sprintf(newPath,"d%d", max - j - 1);
139		if (rmdir(newPath) == -1)
140			err(1, "rmdir(%s) @ %d", newPath, __LINE__);
141	}
142	if (chdir ("..") == -1)
143		err(1, "chdir(\"..\")");
144	if (rmdir(path) == -1)
145		err(1, "rmdir(%s) @ %d", path, __LINE__);
146}
147
148static void
149rmDir(void) {
150	int i;
151	char path[MAXPATHLEN + 1];
152
153	for (i = 0; i < dirs; i++) {
154		sprintf(path,"fstool.%06d.%d", pid, i);
155		rmDir2(path);
156	}
157}
158
159int
160main(int argc, char **argv)
161{
162	int c, i, levels, leave, times;
163	char ch = 0;
164
165	edirs = 0;
166	dirs = 1;
167	files = 5;
168	fs = 1024;
169	leave = 0;
170	levels = 1;
171	times = 1;
172
173	while ((c = getopt(argc, argv, "ad:e:ln:r:f:s:t:")) != -1)
174		switch (c) {
175			case 'a':
176				rnd = 1;
177				break;
178			case 'd':
179				dirs = atoi(optarg);
180				break;
181			case 'e':
182				edirs = atoi(optarg);
183				break;
184			case 'f':
185				files = atoi(optarg);
186				break;
187			case 'l':
188				leave = 1;
189				break;
190			case 'n':
191				levels = atoi(optarg);
192				break;
193			case 's':
194				sscanf(optarg, "%d%c", &fs, &ch);
195				if (ch == 'k' || ch == 'K')
196					fs = fs * 1024;
197				if (ch == 'm' || ch == 'M')
198					fs = fs * 1024 * 1024;
199				break;
200			case 't':
201				times = atoi(optarg);
202				break;
203			default:
204				fprintf(stderr,
205				    "Usage: %s [ -a ] "
206				    "[ -d <parallel dirs> ] [ -e <dirs> ] "
207				    "[ -f <num> ][ -l] [ -n <depth> ] "
208				    " [ -s <file size> ]\n", argv[0]);
209				printf("   -a: random file size 1-s.\n");
210				printf("   -d: Tree width (defaults to 1).\n");
211				printf("   -e: Directories at each level.\n");
212				printf("   -f: Number of files.\n");
213				printf("   -l: Leave the files and dirs.\n");
214				printf("   -n: Tree depth.\n");
215				printf("   -s: Size of each file.\n");
216				printf("   -t: Number of times to repeat\n");
217				exit(1);
218		}
219
220	if (times != 1)
221		leave = 0;
222	max = levels;
223	pid = getpid();
224	if ((buffer = calloc(1, fs)) == NULL)
225		err(1, "calloc(%d)", fs);
226	if (getcwd(here, sizeof(here)) == NULL)
227		err(1, "getcwd()");
228
229	for (i = 0; i < times; i++) {
230		mkDir();
231		if (leave == 0)
232			rmDir();
233	}
234
235	return (0);
236}
237