c언어 redirection 문제 질문드립니다..

void redirection(int i)
{
	int j;
	int fd = 0;
	for(j = 1; j < i - 1; j++) 
	{	
		if(!strcmp(cmdvector[j], ">")) 
		{
			if((fd = open(cmdvector[j + 1], O_WRONLY | O_CREAT, 0644)) < 0) 
			{
				fatal("open error");
			}
			dup2(fd, STDOUT_FILENO);
			cmdvector[j] = '\0';
			cmdvector[j + 1] = '\0';
		}
		else if(!strcmp(cmdvector[j], "<")) 
		{
			if((fd = open(cmdvector[j + 1], O_RDONLY, 0644)) < 0) 
			{
				fatal("read error");
			}
			dup2(fd, STDIN_FILENO);
			cmdvector[j] = '\0';
			cmdvector[j + 1] = '\0';
		}
		continue;
	}
}