git.sesse.net Git - keycount/blob - keycount.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <linux/input.h>
   4 #include <unistd.h>
   5 #include <fcntl.h>
   6 #include <time.h>
   7 #include <sys/time.h>
   8
   9 int main(void)
  10 {
  11         FILE *log = fopen("/var/log/keycount.log", "a");
  12         struct input_event iev;
  13         time_t start = time(NULL);
  14         unsigned count = 0;
  15         int fd = open("/dev/input/event0", O_RDONLY);
  16         if (fd == -1) {
  17                 perror("/dev/input/event0");
  18                 exit(1);
  19         }
  20
  21         for ( ;; ) {
  22                 int ret = read(fd, &iev, sizeof(iev));
  23                 time_t now;
  24                 if (ret != sizeof(iev)) {
  25                         perror("read");
  26                         exit(1);
  27                 }
  28
  29                 if (iev.type != EV_KEY)
  30                         continue;
  31                 if (iev.value != 1)
  32                         continue;
  33
  34                 // see if we want to write out
  35                 now = time(NULL);
  36                 if (now/60 != start/60) {
  37                         fprintf(log, "%u %u\n", (start/60)*60, count);
  38                         fflush(log);
  39                         count = 0;
  40                         start = now;
  41                 }
  42                 ++count;
  43         }
  44 }