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You are here: manpages





SHUTDOWN

Section: Linux Programmer's Manual (2)
Updated: 2016-03-15
Index Return to Main Contents
 

NAME

shutdown - shut down part of a full-duplex connection  

SYNOPSIS

#include <sys/socket.h>

int shutdown(int sockfd, int how);  

DESCRIPTION

The shutdown() call causes all or part of a full-duplex connection on the socket associated with sockfd to be shut down. If how is SHUT_RD, further receptions will be disallowed. If how is SHUT_WR, further transmissions will be disallowed. If how is SHUT_RDWR, further receptions and transmissions will be disallowed.  

RETURN VALUE

On success, zero is returned. On error, -1 is returned, and errno is set appropriately.  

ERRORS

EBADF
sockfd is not a valid file descriptor.
EINVAL
An invalid value was specified in how (but see BUGS).
ENOTCONN
The specified socket is not connected.
ENOTSOCK
The file descriptor sockfd does not refer to a socket.
 

CONFORMING TO

POSIX.1-2001, POSIX.1-2008, 4.4BSD (shutdown() first appeared in 4.2BSD).  

NOTES

The constants SHUT_RD, SHUT_WR, SHUT_RDWR have the value 0, 1, 2, respectively, and are defined in <sys/socket.h> since glibc-2.1.91.  

BUGS

Checks for the validity of how are done in domain-specific code, and before Linux 3.7 not all domains performed these checks. Most notably, UNIX domain sockets simply ignored invalid values. This problem was fixed for UNIX domain sockets in Linux 3.7.  

SEE ALSO

connect(2), socket(2), socket(7)  

COLOPHON

This page is part of release 4.13 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.


 

Index

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
CONFORMING TO
NOTES
BUGS
SEE ALSO
COLOPHON


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