Autoload input devices

src/input.c

@@ -23,6 +23,7 @@
 #include "libevdev/libevdev.h"
 #include "limelight-common/Limelight.h"
 
+#include <libudev.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <stdbool.h>
@@ -93,8 +94,8 @@ void input_create(char* device, char* mapFile) {
 
   devices[dev].fd = open(device, O_RDONLY|O_NONBLOCK);
   if (devices[dev].fd <= 0) {
-    fprintf(stderr, "Failed to open device\n");
-    exit(EXIT_FAILURE);
+    fprintf(stderr, "Failed to open device %s\n", device);
+    return;
   }
 
   devices[dev].dev = libevdev_new();
@@ -116,6 +117,35 @@ void input_create(char* device, char* mapFile) {
   input_init_parms(&devices[dev], &(devices[dev].dpadyParms), devices[dev].map.abs_dpad_y);
 }
 
+void input_autoload(char* mapfile) {
+  struct udev *udev = udev_new();
+  if (!udev) {
+    fprintf(stderr, "Can't create udev\n");
+    exit(1);
+  }
+
+  struct udev_enumerate *enumerate = udev_enumerate_new(udev);
+  udev_enumerate_add_match_subsystem(enumerate, "input");
+  udev_enumerate_scan_devices(enumerate);
+  struct udev_list_entry *devices = udev_enumerate_get_list_entry(enumerate);
+
+  struct udev_list_entry *dev_list_entry;
+  udev_list_entry_foreach(dev_list_entry, devices) {
+    const char *path = udev_list_entry_get_name(dev_list_entry);
+    struct udev_device *dev = udev_device_new_from_syspath(udev, path);
+    const char *devnode = udev_device_get_devnode(dev);
+    int id;
+    if (devnode != NULL && sscanf(devnode, "/dev/input/event%d", &id) == 1) {
+      input_create(devnode, mapfile);
+    }
+    udev_device_unref(dev);
+  }
+
+  udev_enumerate_unref(enumerate);
+
+  udev_unref(udev);
+}
+
 static short input_convert_value(struct input_event *ev, struct input_device *dev, struct input_abs_parms *parms, bool reverse) {
   if (abs(ev->value - parms->avg) < parms->flat)
     return 0;

src/input.h

@@ -17,6 +17,7 @@
  * along with Moonlight; if not, see <http://www.gnu.org/licenses/>.
  */
 
+void input_autoload(char* mapfile);
 void input_create(char* device, char* mapFile);
 void input_loop();
 void input_map(char* fileName);

src/main.c

@@ -122,6 +122,7 @@ int main(int argc, char* argv[]) {
   char* action = NULL;
   char* address = NULL;
   char* mapping = NULL;
+  bool inputs = false;
   int option_index = 0;
   bool sops = true;
   bool localaudio = false;
@@ -159,6 +160,7 @@ int main(int argc, char* argv[]) {
       break;
     case 'j':
       input_create(optarg, mapping);
+      inputs = true;
       break;
     case 'k':
       mapping = optarg;
@@ -209,6 +211,10 @@ int main(int argc, char* argv[]) {
     }
   }
 
+  if (!inputs) {
+    input_autoload(mapping);
+  }
+
   client_init(address);
 
   if (strcmp("applist", action) == 0)