stumbled upon _NSSetLogCStringFunction to hide IOBluetoothDeviceInqui…

…ry debug messages

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## unreleased
 
+* Hide debug log messages from IOBluetoothDeviceInquiry [@toy](https://github.com/toy)
+
 ## v2.11.0 (2025-01-18)
 
 * Inform the user on receiving abort signal, that it may be due to absence of permission [#95](https://github.com/toy/blueutil/issues/95) [@toy](https://github.com/toy)

blueutil.m

@@ -49,6 +49,8 @@ int assert_reg(int errcode, const regex_t *restrict preg, char *reason) {
 int IOBluetoothPreferenceGetDiscoverableState();
 void IOBluetoothPreferenceSetDiscoverableState(int state);
 
+void _NSSetLogCStringFunction(void(*)(const char*, unsigned, BOOL));
+
 // short names
 typedef int (*GetterFunc)();
 typedef bool (*SetterFunc)(int);
@@ -92,6 +94,19 @@ void check_power_on_for(const char *command) {
   eprintf("Power is required to be on for %s command\n", command);
 }
 
+const char *filter_out_ns_log[] = {
+  "-[IOBluetoothDeviceInquiry initWithDelegate:]",
+  "-[IOBluetoothDeviceInquiry dealloc]",
+};
+
+void CustomNSLogOutput(const char* message, __unused unsigned length, __unused BOOL withSysLogBanner) {
+  for (size_t i = 0, _i = sizeof(filter_out_ns_log) / sizeof(filter_out_ns_log[0]); i < _i; i++) {
+    if (strstr(message, filter_out_ns_log[i]) != NULL) return;
+  }
+
+  eprintf("%s\n", message);
+}
+
 void usage(FILE *io) {
   static const char *lines[] = {
     ("blueutil v" VERSION),
@@ -727,6 +742,8 @@ int main(int argc, char *argv[]) {
     }
   }
 
+  _NSSetLogCStringFunction(CustomNSLogOutput);
+
   if (!BTAvaliable()) {
     eprintf("Error: Bluetooth not available!\n");
     return EX_UNAVAILABLE;