파일입출력 도와주십쇼 미치겠네요

void update()
{
	FILE *fp;
	int fd;
	int flags = O_WRONLY | O_CREAT;
	mode_t mode = 0644;
	char buf[1024];
	char *line = NULL;
	fp=open("./memo.txt","r");    
	size_t len =0;
	ssize_t read;
	char name;
 
 
	printf("수정할할 값을 입력하세요 : ");
	scanf("%s", &name);
 
	printf("수정할 이름 : ");
	scanf("%s", &card.name);
	printf("수정할 회사 : ");
	scanf("%s", &card.company);
	printf("수정할 연락처 : ");
	scanf("%s", &card.tel);
	printf("\n\n");
 
	sprintf(buf, "%s\t%s\t\t%s\n", card.name, card.company, card.tel);
	fd = open("temp_memo.txt", flags, mode);
 
	while((read=getline(&line,&len,fp)) != -1)
	{
		if(strchr(line,name))
		{
			write(fd, buf, strlen(buf));
			continue;
		}else{
			write(fd,line,strlen(line));
		}
	}
	free(line);
	remove("memo.txt");
	rename("temp_memo.txt","memo.txt");
	remove("temp_memo.txt");
 
	return;
 
}