const char* marp = move_as_root_path();
		pid_t pid = fork();
		if (pid == 0) {
			if (fds[1] != 1) {
				dup2(fds[1], 1);
				close(fds[1]);
			}
			close(fds[0]);
			execl(marp, marp, file_cstr, NULL);
			_exit(0);
		} else if (pid != -1) {
			close(fds[1]);
			char buf[1024];
			size_t actual_size;
			NSMutableData* data = [[NSMutableData alloc] init];
			while ((actual_size = read(fds[0], buf, 1024)) > 0)
				[data appendBytes:buf length:actual_size];
			close(fds[0]);
			file_content = [[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
			[data release];
		}