share/examples/kld/cdev/test/testcdev.c

   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: src/share/examples/kld/cdev/test/testcdev.c,v 1.2.2.2 2000/12/11 01:03:26 obrien Exp $
  72  * $DragonFly: src/share/examples/kld/cdev/test/testcdev.c,v 1.2 2003/06/17 04:36:57 dillon Exp $
  73  */
  74
  75 #include <stdio.h>
  76 #include <stdlib.h>
  77 #include <fcntl.h>
  78 #include <paths.h>
  79 #include <string.h>
  80 #include <unistd.h>
  81 #include <sys/ioccom.h>
  82
  83 #define CDEV_IOCTL1     _IOR('C', 1, u_int)
  84 #define CDEV_DEVICE     "cdev"
  85
  86 static char writestr[] = "Hello kernel!";
  87 static char buf[512+1];
  88
  89 int
  90 main(int argc, char *argv[])
  91 {
  92         int kernel_fd;
  93         int one;
  94         int len;
  95
  96         if ((kernel_fd = open("/dev/" CDEV_DEVICE, O_RDWR)) == -1) {
  97                 perror("/dev/" CDEV_DEVICE);
  98                 exit(1);
  99         }
 100
 101         /* Send ioctl */
 102         if (ioctl(kernel_fd, CDEV_IOCTL1, &one) == -1) {
 103                 perror("CDEV_IOCTL1");
 104         }
 105         else {
 106                 printf("Sent ioctl CDEV_IOCTL1 to device %s%s\n", _PATH_DEV,
 107                     CDEV_DEVICE);
 108         }
 109
 110         len = strlen(writestr) + 1;
 111
 112         /* Write operation */
 113         if (write(kernel_fd, writestr, len) == -1) {
 114                 perror("write()");
 115         }
 116         else {
 117                 printf("Written \"%s\" string to device /dev/" CDEV_DEVICE "\n",
 118                     writestr);
 119         }
 120
 121         /* Read operation */
 122         if (read(kernel_fd, buf, len) == -1) {
 123                 perror("read()");
 124         }
 125         else {
 126                 printf("Read \"%s\" string from device /dev/" CDEV_DEVICE "\n",
 127                     buf);
 128         }
 129
 130         exit(0);
 131 }