lib/inputevent.c

   1 #include <sys/types.h>
   2 #include <sys/stat.h>
   3 #include <fcntl.h>
   4 #include <stdlib.h>
   5 #include <unistd.h>
   6 #include <linux/input.h>
   7
   8 #include "libautomation.h"
   9
  10 static void atm_input_cb(EV_P_ ev_io *w, int revents) {
  11         struct ATM_INPUT *input = (struct ATM_INPUT *) w;
  12         struct input_event event;
  13
  14         if (read(w->fd, &event, sizeof(event)) == sizeof(event))
  15                 input->cb(&event);
  16 }
  17
  18 struct ATM_INPUT *atm_input_by_path(const char *path,
  19                                    void (*cb)(struct input_event *)) {
  20         char *realpath = atm_globdup(path);
  21         int fd;
  22         struct ATM_INPUT *input = NULL;
  23
  24         if (!realpath)
  25                 return NULL;
  26
  27         if ((fd = open(realpath, O_RDONLY | O_NONBLOCK)) < 0) {
  28                 atm_log("Can't open %s", realpath);
  29                 goto err;
  30         }
  31
  32         input = malloc(sizeof(*input));
  33         input->cb = cb;
  34         ev_io_init(&input->watcher, atm_input_cb, fd, EV_READ);
  35         ev_io_start(EV_A_ &input->watcher);
  36
  37 err:
  38         free(realpath);
  39
  40         return input;
  41 }