accept()

Accept a connection on a socket 

bind()

Bind a name to a socket 

close()

Close a file descriptor 

connect()

Initiate a connection on a socket 

dup()

Duplicate an open file descriptor 

dup2()

Duplicate an open file descriptor 

fcntl()

File control 

getpeername()

Get name of connected peer 

getsockname()

Get socket name 

setsockopt()

Set options on sockets 

getsockopt()

Get options on sockets 

ioctl()

Device control 

listen()

Listen for connections on a socket 

read()

Read from a socket 

recv()

Receive a message from a socket 

recvfrom()

Receive a message from a socket 

recvmsg()

Receive a message from a socket 

select()

Synchronous I/O multiplexing 

send()

Send a message from a socket 

sendto()

Send a message from a socket. 

sendmsg()

Send a message from a socket 

shutdown()

Shut down part of a full-duplex connection 

socket()

Create an endpoint for communication 

socketpair()

Create a pair of connected sockets 

write()

Write on a socket