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SHUTDOWN(2)                Linux Programmer's Manual               SHUTDOWN(2)



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 appropri-
       ately.

ERRORS
       EBADF  sockfd is not a valid descriptor.

       ENOTCONN
              The specified socket is not connected.

       ENOTSOCK
              sockfd is a file, not a socket.

CONFORMING TO
       POSIX.1-2001, 4.4BSD (the shutdown() function call 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.

SEE ALSO
       connect(2), socket(2), socket(7)

COLOPHON
       This page is part of release 3.22 of the Linux man-pages project.  A description of
       the  project, and information about reporting bugs, can be found at http://www.ker-
       nel.org/doc/man-pages/.



Linux                             2008-12-03                       SHUTDOWN(2)

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