Delay locating Finder process up to 5 seconds before injection

When installed as a LuanchAngent, injector could run before Finder is up.
If so, resulting pid will be 0, leaving the actual injection not performed.
As a remedy, limited delay checks are applied to ensure that Finder pid is
correctly located.

Author: cyining

source/main.m

@@ -35,6 +35,20 @@ int main( int argc, char* argv[] )
 		ProcessSerialNumber psn; FindProcessBySignature( 'FNDR', 'MACS', &psn );
 		pid_t pid; GetProcessPID( &psn, &pid );
 
+		int retry = 5;
+		while (!pid && retry--)
+		{
+			[NSThread sleepForTimeInterval:1.0f];
+			FindProcessBySignature( 'FNDR', 'MACS', &psn );
+			GetProcessPID( &psn, &pid );
+		}
+		if (!pid)
+		{
+			NSLog(@"missing target");
+			[pool release];
+			return -1;
+		}
+
 		NSString* bundlePath = [NSString stringWithCString:argv[1] encoding:NSASCIIStringEncoding];
 		NSString* stubPath = [NSString stringWithCString:argv[2] encoding:NSASCIIStringEncoding];