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System Calls - Manual Reference Pages  - SHUTDOWN (2)

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shutdown - shut down part of a full-duplex connection

CONTENTS

Synopsis
Description
Errors
Notes

--> #include <sys/socket.h>

int shutdown(int s, int how);

The shutdown() call causes all or part of a full-duplex connection on the socket associated with s 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.

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

EBADF	s is not a valid descriptor.
ENOTCONN
	The specified socket is not connected.
ENOTSOCK
	s is a file, not a socket.

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.

POSIX.1-2001, 4.4BSD (the shutdown() function call first appeared in 4.2BSD).

connect(2), socket(2) or go to Top of page |  Section 2 |  Main Man Index.