Initial implementation and makefile

Makefile

@@ -0,0 +1,12 @@
+CFLAGS = -Wall -Weverything -lobjc -framework IOBluetooth
+
+build: btname
+
+install: build
+	install -m 755 btname /usr/local/bin/btname
+
+uninstall:
+	${RM} /usr/local/bin/btname
+
+clean:
+	${RM} btname

btname.m

@@ -0,0 +1,42 @@
+#import <stdio.h>
+#import <string.h>
+#import <objc/objc.h>
+
+@interface IOBluetoothHostController
++ (IOBluetoothHostController *)defaultController;
+- (int)BluetoothHCIReadLocalName:(char[248])name;
+- (int)BluetoothHCIWriteLocalName:(char[248])name;
+@end
+
+int main()
+{
+    IOBluetoothHostController *controller = [IOBluetoothHostController defaultController];
+
+    char oldName[248];
+    [controller BluetoothHCIReadLocalName:oldName];
+    printf("Current bluetooth name is \"%s\". New name? ", oldName);
+
+    BOOL changed = false;
+    char newName[248];
+    if (fgets(newName, sizeof(newName), stdin) != NULL) {
+        // Get rid of newline at end
+        newName[strcspn(newName, "\n")] = '\0';
+
+        if (newName[0] != '\0') {
+            [controller BluetoothHCIWriteLocalName:newName];
+            changed = true;
+        }
+    } else {
+        printf("\n");
+    }
+
+    if (changed) {
+        // Read again for good measure
+        [controller BluetoothHCIReadLocalName:newName];
+        printf("Bluetooth name has been changed to \"%s\"\n", newName);
+    } else {
+        printf("Name not changed\n");
+    }
+
+    return 0;
+}