Minor code cleanup, wrote a homebrew formula for it

Makefile

@@ -41,12 +41,9 @@ tags:	$(SRC)
 	@echo [ctags]
 	@ctags $(SRC)
 
-# root ownership and suid bit is set to enable non-root execution
-#install:	kbbutil
-#	@sudo rm -f $(PREFIX)/bin/kbbutil
-#	@cp -a kbbutil $(PREFIX)/bin/kbbutil
-#	@sudo chown root:root $(PREFIX)/bin/kbbutil
-#	@sudo chmod 4755 $(PREFIX)/bin/kbbutil
+
+install:	kbbutil
+	@mv kbbutil $(PREFIX)/bin/kbbutil
 
 depend:
 	makedepend -Y $(SRC)

kbbutil.c

@@ -10,7 +10,7 @@
 
 // variable defs {{{
 io_connect_t io;
-uint64_t wtf=0;
+uint64_t wtf=0; // I don't know what this is used for
 //}}}
 
 int getKBBrightness(void) {//{{{
@@ -36,12 +36,35 @@ int main(int argc, char *argv []) {//{{{
 	kern_return_t kr;
 	io_service_t is;
 	is = IOServiceGetMatchingService(kIOMasterPortDefault,IOServiceMatching("AppleLMUController"));
-	if(!is) {fprintf(stderr,"Failed to into AppleLMUController\n");exit(1);}
+	if(!is) { fprintf(stderr,"Failed to get AppleLMUController service\n"); exit(1); }
 	kr = IOServiceOpen(is,mach_task_self(),0,&io);
 	IOObjectRelease(is);
 	if(kr!=KERN_SUCCESS) { mach_error("IOKit error: ",kr); exit(kr); }
-	if(argc==1||(argc==2&&(strcmp(argv[1],"-n")==0||strcmp(argv[1],"--numeric-only")==0))) printf(argc==2? "%i" : "Current keyboard brightness: %i\n",getKBBrightness());
-	else if(argc==2&&((atoi(argv[1])==0&&strcmp(argv[1],"0")==0)||(atoi(argv[1])>0&&atoi(argv[1])<=4091))) setKBBrightness(atoi(argv[1]));
-	else {fprintf(stderr,"Invalid argument. kbbutil must be run either with no arguments, with -n or --numeric-only, or with one argument which is a number between 0 and 4091.\n");exit(1);}
+	//big argparsing block i intend to clean up later, but for now i've just formatted it more readably
+	if
+		(argc==1 ||
+		(argc==2 &&
+			(strcmp(argv[1],"-n")==0 ||
+			strcmp(argv[1],"--numeric-only")==0)
+		)
+	)
+		printf(argc==2? "%i\n" : "Current keyboard brightness: %i\n",getKBBrightness());
+	else if
+		(argc==2 && (
+			(atoi(argv[1])==0 && strcmp(argv[1],"0")==0) ||
+			(atoi(argv[1])> 0 && atoi(argv[1])<=4091)
+		)
+	) {
+		if(!setKBBrightness(atoi(argv[1]))) {
+			fprintf(stderr,"Error setting brightness to %i.\n",atoi(argv[1]));
+			exit(1);
+		}
+	} else {
+		fprintf(stderr,"Usage:\n\
+- kbbutil : Returns current brightness\n\
+- kbbutil [-n|--numeric-only] : Returns only integer brightness\n\
+- kbbutil [0-4091] : Set brightness\n");
+		exit(1);
+	}
 	return 0;
 }//}}}

kbbutil.h

@@ -12,6 +12,7 @@
 // prototypes {{{
 int getKBBrightness(void);
 bool setKBBrightness(int);
+int   main(int, char* []);
 enum {
 	kGetSensorReadingID	= 0,
 	kGetLEDBrightnessID	= 1,