Manpages - shutdown.3p

This manual page is part of the POSIX Programmer’s Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.

shutdown — shut down socket send and receive operations

  #include <sys/socket.h>
  int shutdown(int socket, int how);

The shutdown/() function shall cause all or part of a full-duplex connection on the socket associated with the file descriptor /socket to be shut down.

The /shutdown/() function takes the following arguments:

socket

Specifies the file descriptor of the socket.

how

Specifies the type of shutdown. The values are as follows:

SHUT_RD

Disables further receive operations.

SHUT_WR

Disables further send operations.

SHUT_RDWR

Disables further send and receive operations.

The shutdown/() function disables subsequent send and/or receive operations on a socket, depending on the value of the /how argument.

Upon successful completion, shutdown/() shall return 0; otherwise, -1 shall be returned and /errno set to indicate the error.

The /shutdown/() function shall fail if:

EBADF

The socket argument is not a valid file descriptor.

EINVAL

The how argument is invalid.

ENOTCONN

The socket is not connected.

ENOTSOCK

The socket argument does not refer to a socket.

The /shutdown/() function may fail if:

ENOBUFS

Insufficient resources were available in the system to perform the operation.

The following sections are informative.

None.

None.

None.

None.

/getsockopt ( )/, /pselect ( )/, /read ( )/, /recv ( )/, /recvfrom ( )/, /recvmsg ( )/, /send ( )/, /sendto ( )/, /setsockopt ( )/, /socket ( )/, /write ( )/

The Base Definitions volume of POSIX.1‐2017, <sys_socket.h>

Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1-2017, Standard for Information Technology – Portable Operating System Interface (POSIX), The Open Group Base Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the Institute of Electrical and Electronics Engineers, Inc and The Open Group. In the event of any discrepancy between this version and the original IEEE and The Open Group Standard, the original IEEE and The Open Group Standard is the referee document. The original Standard can be obtained online at http://www.opengroup.org/unix/online.html .

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