testcdev.c revision 69793 
1/* 08 Nov 1998*/
2/*
3 * testmisc.c
4 *
5 * Test program to call the sample loaded kld device driver.
6 *
7 * 05 Jun 93	Rajesh Vaidheeswarran		Original
8 *
9 *
10 * Copyright (c) 1993 Rajesh Vaidheeswarran.
11 * All rights reserved.
12 *
13 * Redistribution and use in source and binary forms, with or without
14 * modification, are permitted provided that the following conditions
15 * are met:
16 * 1. Redistributions of source code must retain the above copyright
17 *    notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 *    notice, this list of conditions and the following disclaimer in the
20 *    documentation and/or other materials provided with the distribution.
21 * 3. All advertising materials mentioning features or use of this software
22 *    must display the following acknowledgement:
23 *      This product includes software developed by Rajesh Vaidheeswarran.
24 * 4. The name Rajesh Vaidheeswarran may not be used to endorse or promote
25 *    products derived from this software without specific prior written
26 *    permission.
27 *
28 * THIS SOFTWARE IS PROVIDED BY RAJESH VAIDHEESWARRAN ``AS IS'' AND ANY
29 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
30 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
31 * ARE DISCLAIMED.  IN NO EVENT SHALL THE RAJESH VAIDHEESWARRAN BE LIABLE
32 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
33 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
34 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
35 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
36 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
37 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 * SUCH DAMAGE.
39 *
40 * Copyright (c) 1993 Terrence R. Lambert.
41 * All rights reserved.
42 *
43 * Redistribution and use in source and binary forms, with or without
44 * modification, are permitted provided that the following conditions
45 * are met:
46 * 1. Redistributions of source code must retain the above copyright
47 *    notice, this list of conditions and the following disclaimer.
48 * 2. Redistributions in binary form must reproduce the above copyright
49 *    notice, this list of conditions and the following disclaimer in the
50 *    documentation and/or other materials provided with the distribution.
51 * 3. All advertising materials mentioning features or use of this software
52 *    must display the following acknowledgement:
53 *      This product includes software developed by Terrence R. Lambert.
54 * 4. The name Terrence R. Lambert may not be used to endorse or promote
55 *    products derived from this software without specific prior written
56 *    permission.
57 *
58 * THIS SOFTWARE IS PROVIDED BY TERRENCE R. LAMBERT ``AS IS'' AND ANY
59 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
61 * ARE DISCLAIMED.  IN NO EVENT SHALL THE TERRENCE R. LAMBERT BE LIABLE
62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
68 * SUCH DAMAGE.
69 *
70 *
71 * $FreeBSD: head/share/examples/kld/cdev/test/testcdev.c 69793 2000-12-09 09:35:55Z obrien $
72 */
73
74#include <stdio.h>
75#include <fcntl.h>
76#include <paths.h>
77#include <string.h>
78#include <sys/ioccom.h>
79
80#define CDEV_IOCTL1     _IOR('C', 1, u_int)
81#define CDEV_DEVICE	"cdev"
82
83static char writestr[] = "Hello kernel!";
84static char buf[512+1];
85
86int
87main(int argc, char *argv[])
88{
89    int kernel_fd;
90    int one;
91    int len;
92
93    if ((kernel_fd = open("/dev/" CDEV_DEVICE, O_RDWR)) == -1) {
94	perror("/dev/" CDEV_DEVICE);
95	exit(1);
96    }
97
98    /* Send ioctl */
99    if (ioctl(kernel_fd, CDEV_IOCTL1, &one) == -1) {
100	perror("CDEV_IOCTL1");
101    } else {
102	printf( "Sent ioctl CDEV_IOCTL1 to device %s%s\n", _PATH_DEV, CDEV_DEVICE);
103    }
104
105    len = strlen(writestr) + 1;
106
107    /* Write operation */
108    if (write(kernel_fd, writestr, len) == -1) {
109	perror("write()");
110    } else {
111	printf("Written \"%s\" string to device /dev/" CDEV_DEVICE "\n", writestr);
112    }
113
114    /* Read operation */
115    if (read(kernel_fd, buf, len) == -1) {
116	perror("read()");
117    } else {
118	printf("Read \"%s\" string from device /dev/" CDEV_DEVICE "\n", buf);
119    }
120
121    exit(0);
122}
123