Thread: reading from argv[]

Hey does anyone have any clue why filename is never getting allocated in the code below?
I read it afterwards and its giving me a seg fault.

Code:

for (i = 1; i < (argc + 1); i++){
			if (strcmp(argv[i], "-h") == 0){ /* -h operand is in command line */
				isHtml = 1; 
			}	
			else if (strcmp(argv[i], "-f") == 0){
				hasFilter = 1;
				if (argv[i + 1] != NULL){
					filterfile = argv[++i];
				}
				else{
					fprintf(stderr, "Usage: tvprogs [-h] [-f filterfile] epgXMLfile");
					return EXIT_FAILURE;
				}
			}
			else {
				filename = argv[i];
			}
		}