Use iSMC instead of custom cpu-temp tool

Fixes #10

system-info/system-info-macOS.sh

@@ -8,68 +8,7 @@ if [ ! -d $cache_dir ]; then
   mkdir -p $cache_dir
 fi
 
-if [ ! -f $cache_dir/cpu-temp ]; then
+[ -f $cache_dir/cpu-temp ] && rm $cache_dir/cpu-temp
-  clang -x objective-c -Wall -O2 -g -c -o $cache_dir/cpu-temp.o - << EOF
-#import <Foundation/Foundation.h>
-#import <IOKit/hidsystem/IOHIDEventSystemClient.h>
-#include <unistd.h>
-
-#define IOHIDEventFieldBase(type) (type << 16)
-#define kIOHIDEventTypeTemperature 15
-
-typedef struct __IOHIDEvent *IOHIDEventRef;
-typedef struct __IOHIDServiceClient *IOHIDServiceClientRef;
-typedef double IOHIDFloat;
-
-IOHIDEventSystemClientRef
-IOHIDEventSystemClientCreate(CFAllocatorRef allocator);
-int IOHIDEventSystemClientSetMatching(IOHIDEventSystemClientRef client,
-                                      CFDictionaryRef match);
-IOHIDEventRef IOHIDServiceClientCopyEvent(IOHIDServiceClientRef, int64_t,
-                                          int32_t, int64_t);
-CFStringRef IOHIDServiceClientCopyProperty(IOHIDServiceClientRef service,
-                                           CFStringRef property);
-IOHIDFloat IOHIDEventGetFloatValue(IOHIDEventRef event, int32_t field);
-
-int main(int argc, char *argv[]) {
-  NSDictionary *thermalSensors = @{
-    @"PrimaryUsagePage" : [NSNumber numberWithInt:0xFF00],
-    @"PrimaryUsage" : [NSNumber numberWithInt:5],
-  };
-  IOHIDEventSystemClientRef system =
-      IOHIDEventSystemClientCreate(kCFAllocatorDefault);
-  IOHIDEventSystemClientSetMatching(system,
-                                    (__bridge CFDictionaryRef)thermalSensors);
-  NSArray *serviceClients =
-      (__bridge NSArray *)IOHIDEventSystemClientCopyServices(system);
-
-  long count = [serviceClients count];
-  for (NSUInteger i = 0; i < count; i++) {
-    IOHIDServiceClientRef serviceClient =
-        (IOHIDServiceClientRef)serviceClients[i];
-    NSString *name = (NSString *)IOHIDServiceClientCopyProperty(
-        serviceClient, (__bridge CFStringRef) @"Product");
-    if ([name isEqualToString:[NSString stringWithUTF8String:argv[1]]]) {
-      IOHIDEventRef event = IOHIDServiceClientCopyEvent(
-          serviceClient, kIOHIDEventTypeTemperature, 0, 0);
-      NSNumber *value;
-      double temp = 0.0;
-      if (event != 0) {
-        temp = IOHIDEventGetFloatValue(
-            event, IOHIDEventFieldBase(kIOHIDEventTypeTemperature));
-      }
-      value = [NSNumber numberWithDouble:temp];
-      printf("%.1lf°C\n", [value doubleValue]);
-      break;
-    }
-  }
-
-  return 0;
-}
-EOF
-  clang -o $cache_dir/cpu-temp $cache_dir/cpu-temp.o -framework Foundation -framework IOKit
-  rm $cache_dir/cpu-temp.o
-fi
 
 # Cleanup cache file when interrupted.
 trap '[ -f $cache_file ] && rm $cache_file; exit' INT
@@ -81,7 +20,9 @@ ioreg -w0 -l | grep BatteryInstalled &> /dev/null && \
 
 while true; do
   # Get the current CPU temperature.
-  cpu_temp="`$cache_dir/cpu-temp 'PMU tdie1'` "
+  cpu_temp=$(
+    ~/.local/bin/iSMC -o json temp | jq '."PMU tdie1".quantity' | xargs printf "%.1f°C "
+  )
 
   cpu_load=$(sudo powermetrics --format text \
       --sample-rate 1200 --sample-count 1 --samplers cpu_power |