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PROLOG | NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | EXAMPLES | APPLICATION USAGE | RATIONALE | FUTURE DIRECTIONS | SEE ALSO | COPYRIGHT |
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SHUTDOWN(3P) POSIX Programmer's Manual 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(3p), pselect(3p), read(3p), recv(3p), recvfrom(3p),
recvmsg(3p), send(3p), sendto(3p), setsockopt(3p), socket(3p),
write(3p)
The Base Definitions volume of POSIX.1‐2017, sys_socket.h(0p)
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 .
Any typographical or formatting errors that appear in this page
are most likely to have been introduced during the conversion of
the source files to man page format. To report such errors, see
https://www.kernel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group 2017 SHUTDOWN(3P)
Pages that refer to this page: sys_socket.h(0p), connect(3p), recv(3p), recvfrom(3p), recvmsg(3p), send(3p), sendmsg(3p), sendto(3p), socket(3p)
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HTML rendering created 2025-09-06 by Michael Kerrisk, author of The Linux Programming Interface. For details of in-depth Linux/UNIX system programming training courses that I teach, look here. Hosting by jambit GmbH. |
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