Use NSWorkspace for checking for running instance, instead of NSTask with a shell

Author: Pegolon

PFMoveApplication.m

@@ -159,13 +159,18 @@ void PFMoveToApplicationsFolderIfNecessary() {
 			// If a copy already exists in the Applications folder, put it in the Trash
 			if ([fm fileExistsAtPath:destinationPath]) {
 				// But first, make sure that it's not running
-				NSString *script = [NSString stringWithFormat:@"ps ax -o comm | grep '%@/' | grep -v grep >/dev/null", destinationPath];
-				NSTask *task = [NSTask launchedTaskWithLaunchPath:@"/bin/sh" arguments:[NSArray arrayWithObjects:@"-c", script, nil]];
-				[task waitUntilExit];
-
+				BOOL destinationIsRunning = NO;
+				for (NSRunningApplication *runningApplication in [[NSWorkspace sharedWorkspace] runningApplications]) {
+					NSString *executablePath = [[runningApplication executableURL] path];
+					if ([[executablePath substringToIndex:[destinationPath length]] isEqualToString:destinationPath]) {
+						destinationIsRunning = YES;
+						break;
+					}
+				}
+				
 				// If the task terminated with status 0, it means that the final grep produced 1 or more lines of output.
 				// It means that the app is already running
-				if ([task terminationStatus] == 0) {
+				if (destinationIsRunning) {
 					// Give the running app focus and terminate myself
 					NSLog(@"INFO -- Switching to an already running version");
 					[[NSTask launchedTaskWithLaunchPath:@"/usr/bin/open" arguments:[NSArray arrayWithObject:destinationPath]] waitUntilExit];