cdev/test.c

   1 #include <fcntl.h>
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <sys/ioctl.h>
   6 #include <sys/mydev.h>
   7
   8 int main()
   9 {
  10     struct mydev_params params;
  11     int mydev_dev;
  12
  13     params.number = 42;
  14     strcpy(params.string, "Hello World");
  15
  16     if ((mydev_dev = open("/dev/mydev", O_RDONLY, 0)) < 0) {
  17         fprintf(stderr, "Failed to open /dev/mydev\n");
  18         exit(2);
  19     }
  20
  21     if (ioctl(mydev_dev, MYDEVTEST, &params) < 0) {
  22         perror("ioctl failed");
  23         exit(2);
  24     }
  25
  26     exit(0);
  27 }