Linux-system-programming

• Socket, log-in and reservation in C
• If you want to use this program, you should run the "Makefile" which is in each directory

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0. An input example(for client)

1. exam

• NAME(ID)
• 0000(PW) //Correct password
• 3(product number)
• 1(order quantity)

2. exam

• NAME(ID)
• 0000(PW) //Worng password
• y(retry)
• 9999(PW) //Correct password
• 3(product number)
• 1(order quantity)

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1. Log-in

• Enter ID
• If this ID exists, the client would enter the password and be checked if it is correct.
• If it's not correct, the server would ask the client to enter the password again. When the client says "y", the user could retry.
• If this ID is not existed, the server would make new directory and take the password and save.
• The password should be a 4-letter word. If it is more than 4 letters, the server would save only the first 4 letters.

1. 로그인

• Id입력
• 기존에 있는 id이면 pw를 입력받고 일치하는지 확인, 불일치면 다시 입력하는지 묻고 재시도
• 기존에 없는 새 id이면 새로운 dir생성, pw를 입력받고 저장
• pw는 4글자, 그 이상받아도 앞 4글자만 저장됨

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2. Show the List of Products and Price.

• When the client logs in successfully, the server gives the list of products and price to the client.

2. 상품 출력

• 로그인을 성공하면 서버에서 상품과 가격을 받아 출력함

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3. Pick One.

• The client should enter the number of a product that the customer wants.

3. 상품 고르기

• 원하는 상품의 번호를 입력

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4. The Quantity

• Enter the quantity how many the customer wants it.

4. 상품 수량

• 원하는 수량을 입력

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5. Complete the order and Save

• Save the details of the order such as product's name, quantity and total bill.

5. 주문완료 & 저장

• 주문 완료된 상세정보(주문한 상품, 갯수, 가격)을 서버에 저장
• 클라이언트에게 출력

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6. The 5min timeout works when there is no interactive activies to server.

7. 5분이상 입력없으면 강제종료

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