1 files changed, 33 insertions, 0 deletions
diff --git a/evdev.c b/evdev.c
new file mode 100644
index 0000000..930c325
--- /dev/null
+++ b/evdev.c
@@ -0,0 +1,33 @@
+#include <string.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <sys/syscall.h>
+#include "evdev.h"
+
+int find_default_keyboard(char *buffer, size_t buffer_len)
+{
+	FILE *devices;
+	char events[128];
+	char handlers[128];
+	char *event;
+	int i;
+
+	devices = fopen("/proc/bus/input/devices", "r");
+	if (!devices) {
+		perror("fopen");
+		return -1;
+	}
+	while (fgets(events, sizeof(events), devices)) {
+		if (strstr(events, "H: Handlers=") == events)
+			strcpy(handlers, events);
+		else if (!strcmp(events, "B: EV=120013\n") && (event = strstr(handlers, "event"))) {
+			for (i = 0, event += sizeof("event") - 1; *event && isdigit(*event); ++event, ++i)
+				handlers[i] = *event;
+			handlers[i] = '\0';
+			fclose(devices);
+			return snprintf(buffer, buffer_len, "/dev/input/event%s", handlers);
+		}
+	}
+	fclose(devices);
+	return -1;
+}