vmod/lib/libvmod16a2.c

   1 /**
   2    @file   libvmod16a2.c
   3    @brief  Library file for the vmod16a2 driver
   4    @author Juan David Gonzalez Cobas
   5    @date   October 17 2009
   6  */
   7
   8 #include <sys/ioctl.h>
   9 #include <fcntl.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include "vmod16a2.h"
  13 #include "libvmod16a2.h"
  14
  15 int vmod16a2_get_handle(unsigned int lun)
  16 {
  17         const int filename_sz = 256;
  18         char devname[filename_sz];
  19         const char *driver_name = "vmod16a2";
  20         int fd;
  21
  22         /* open the device file */
  23         snprintf(devname, filename_sz, "/dev/%s.%d", driver_name, lun);
  24         fd = open(devname, O_RDONLY);
  25         return fd;
  26 }
  27
  28 int vmod16a2_convert(int fd, int channel, int datum)
  29 {
  30         struct vmod16a2_convert cvt, *cvtp = &cvt;
  31
  32         cvtp->channel = channel;
  33         cvtp->value   = datum;
  34         return ioctl(fd, VMOD16A2_IOCPUT, cvtp);
  35 }
  36
  37 int vmod16a2_close(int fd)
  38 {
  39         return close(fd);
  40 }