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/param.h>
29 #include <sys/types.h>
30 #include <sys/stat.h>
31 #include <stdio.h>
32 #include <fcntl.h>
33 #include <stdlib.h>
34 #include <unistd.h>
35 #include <signal.h>
36 #include <sys/wait.h>
37 #include <string.h>
38 #include <err.h>
39
40 #include "stress.h"
41
42 static char path[MAXPATHLEN+1];
43 #define NB (1 * 1024 * 1024)
44
45 int bufsize;
46
47 static void
reader(void)48 reader(void) {
49 int fd;
50 int i, n, *buf;
51
52 if ((fd = open(path, O_RDWR, 0600)) < 0) {
53 unlink(path);
54 err(1, "open(%s)", path);
55 }
56 if ((buf = malloc(bufsize)) == NULL)
57 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__);
58 for (i = 0; i < NB; i+= bufsize) {
59 if ((n = read(fd, buf, bufsize)) < 0)
60 err(1, "read(), %s:%d", __FILE__, __LINE__);
61 if (n == 0) break;
62 }
63 close(fd);
64 free(buf);
65 return;
66 }
67
68 static void
writer(void)69 writer(void) {
70 int i, *buf;
71 int fd;
72
73 if ((fd = open(path, O_RDWR, 0600)) < 0) {
74 unlink(path);
75 err(1, "open(%s)", path);
76 }
77 if ((buf = malloc(bufsize)) == NULL)
78 err(1, "malloc(%d), %s:%d", bufsize, __FILE__, __LINE__);
79 for (i = 0; i < bufsize / sizeof(int); i++)
80 buf[i] = i;
81
82 for (i = 0; i < NB; i+= bufsize) {
83 if (write(fd, buf, bufsize) < 0) {
84 err(1, "write(%d), %s:%d", fd,
85 __FILE__, __LINE__);
86 }
87 }
88 close(fd);
89 free(buf);
90 return;
91 }
92
93 int
setup(int nb)94 setup(int nb)
95 {
96 bufsize = 2 << random_int(2, 12);
97 return (0);
98 }
99
100 void
cleanup(void)101 cleanup(void)
102 {
103 }
104
105 int
test(void)106 test(void)
107 {
108 pid_t pid;
109 int i, status;
110
111 for (i = 0; i < 100; i++) {
112 if (sprintf(path, "fifo.%d.%d", getpid(), i) < 0)
113 err(1, "sprintf()");
114 if (mkfifo(path, 0600) < 0)
115 err(1, "mkfifo(%s)", path);
116 }
117 for (i = 0; i < 100; i++) {
118 if (sprintf(path, "fifo.%d.%d", getpid(), i) < 0)
119 err(1, "sprintf()");
120 if (unlink(path) < 0)
121 err(1, "unlink(%s)", path);
122 }
123
124
125 if (sprintf(path, "fifo.%d", getpid()) < 0)
126 err(1, "sprintf()");
127 if (mkfifo(path, 0600) < 0)
128 err(1, "mkfifo(%s)", path);
129
130 if ((pid = fork()) == 0) {
131 writer();
132 exit(EXIT_SUCCESS);
133
134 } else if (pid > 0) {
135 reader();
136 kill(pid, SIGINT);
137 if (waitpid(pid, &status, 0) == -1)
138 warn("waitpid(%d)", pid);
139 } else
140 err(1, "fork(), %s:%d", __FILE__, __LINE__);
141
142 unlink(path);
143 return (0);
144 }
145