Annotation of prex/usr/test/pipe/pipe.c, Revision 1.1.1.1
1.1 nbrk 1: /*
2: * Copyright (c) 2008, Kohsuke Ohtani
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: * 3. Neither the name of the author nor the names of any co-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 AUTHOR 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 AUTHOR 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: * pipe.c - test unix pipe
32: */
33:
34: #include <prex/prex.h>
35: #include <sys/fcntl.h>
36: #include <sys/stat.h>
37: #include <sys/errno.h>
38:
39: #include <stdio.h>
40: #include <stdlib.h>
41: #include <string.h>
42: #include <unistd.h>
43:
44:
45: static void
46: test1(void)
47: {
48: int fd[2];
49: char str[] = "test1";
50: char buf[256];
51:
52: printf("pipe test program\n");
53:
54: if (pipe(fd) == -1) {
55: perror("pipe");
56: exit(1);
57: }
58: write(fd[1], str, sizeof(str));
59: read(fd[0], buf, sizeof(buf));
60: printf("str=%s\n", buf);
61: }
62:
63: static void
64: test2(void)
65: {
66: int fd[2];
67: char str[] = "test2: hello!";
68: char buf[256];
69:
70: printf("pipe test program\n");
71:
72: if (pipe(fd) == -1) {
73: perror("pipe");
74: exit(1);
75: }
76: switch(vfork()) {
77: case -1:
78: perror("fork");
79: break;
80:
81: case 0: /* child */
82: close(fd[1]);
83: read(fd[0], buf, 256);
84: close(fd[0]);
85: printf("str=%s\n", buf);
86: exit(0);
87: break;
88:
89: default: /* parent */
90: close(fd[0]);
91: write(fd[1], str, sizeof(str));
92: close(fd[1]);
93: exit(0);
94: break;
95: }
96: }
97:
98: int
99: main(int argc, char *argv[])
100: {
101: test2();
102: return 0;
103: }
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