New binary and device selection list and device parameter.

tikker.c

@@ -7,6 +7,8 @@
 #include <sys/ioctl.h>
 #include <unistd.h>
 
+#define DATABASE_NAME "tikker.db"
+#define DEVICE_TO_READ_DEFAULT "keyboard"
 #define MAX_DEVICES 32
 #define DEVICE_PATH "/dev/input/event"
 
@@ -50,19 +52,21 @@ const char *keycode_to_char[] = {
 
 
 
-int is_keyboard(int fd) {
-    char device_name[256] = {0};
+char * resolve_device_name(int fd) {
+    static char device_name[256];
+    device_name[0] = 0;
 
     if (ioctl(fd, EVIOCGNAME(sizeof(device_name)), device_name) < 0) {
         return 0;
     }
-
-    return strstr(device_name, "keyboard") != NULL;
+    return device_name;
 }
 
-int main() {
+int main(int argc, char *argv[]) {
 
-    int db = sormc("tikker.db");
+    char * device_to_read = rargs_get_option_string(argc, argv, "--device", DEVICE_TO_READ_DEFAULT);
+
+    int db = sormc(DATABASE_NAME);
 
     ulonglong times_repeated = 0;
     ulonglong times_pressed = 0;
@@ -81,17 +85,26 @@ int main() {
         if (fd < 0) {
             continue;
         }
+        char * device_name = resolve_device_name(fd);
+        if(!device_name)
+        {
+            close(fd);
+            continue;
+        }
+        bool is_device_to_read = strstr(device_name, device_to_read) != NULL;
+        printf("[%s] %s. Mount: %s.\n", is_device_to_read ? "-" : "+",  device_name, device_path);
 
-        if (is_keyboard(fd)) {
+        if (is_device_to_read) {
             keyboard_fds[num_keyboards++] = fd;
-            printf("Found keyboard: %s\n", device_path);
         } else {
             close(fd);
         }
     }
 
     if (num_keyboards == 0) {
-        fprintf(stderr, "No keyboard found.\n");
+        fprintf(stderr, "No keyboard found. Do you execute under root?\n"
+            "If your device is listed above with a minus[-] in front of it,\n"
+            "execute this application using --device='[DEVICE_NAME]'\n");
         return 1;
     }