linux - Is it necessary to close an accept return file descriptor

Question

Just as the title saying,in a tcp connect example

1. a server create a sockfd with socket(AF_INET, SOCK_STREAM, IPPROTO_TCP) function,
2. then it bind the sockfd to a local sockaddr struct,
3. the server accept the client's connection, and returns a clientfd
4. server and client send or recv messages

here is the question,after step 4, is it necessary to close the clientfd by manual?

Answer 1

返回clientfd的是一个全新的文件描述符。如果不这样做close，该文件描述符将泄漏。

所以，是的，您应该始终 close从accept. 请注意，shutdown不会关闭文件描述符，它只是阻止它被用于进一步的通信。