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NAME

       shutdown - shut down part of a full-duplex connection

SYNOPSIS

       #include <sys/socket.h>

       int shutdown(int s, int how);

DESCRIPTION

       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.

RETURN VALUE

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

ERRORS

       EBADF  s is not a valid descriptor.

       ENOTCONN
              The specified socket is not connected.

       ENOTSOCK
              s is a file, not a socket.

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.

CONFORMING TO

       4.4BSD (the shutdown() function call first appeared in 4.2BSD).

SEE ALSO

       connect(2), socket(2)