shutdown(2) [netbsd man page]

SHUTDOWN(2)						      BSD System Calls Manual						       SHUTDOWN(2)

NAME

     shutdown -- shut down part of a full-duplex connection

LIBRARY

     Standard C Library (libc, -lc)

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.  The how argument speci-
     fies which part of the connection will be shut down.  Permissible values are:

	   SHUT_RD	further receives will be disallowed.

	   SHUT_WR	further sends will be disallowed.

	   SHUT_RDWR	further sends and receives will be disallowed.

RETURN VALUES

     A 0 is returned if the call succeeds, -1 if it fails.

ERRORS

     The call succeeds unless:

     [EBADF]		s is not a valid descriptor.

     [EINVAL]		The how argument is invalid.

     [ENOTCONN] 	The specified socket is not connected.

     [ENOTSOCK] 	s is a file, not a socket.

SEE ALSO

     connect(2), socket(2)

HISTORY

     The shutdown() function call appeared in 4.2BSD.  The how arguments used to be simply 0, 1, and 2, but now have named values as specified by
     X/Open Portability Guide Issue 4 (``XPG4'').

BSD
								  August 18, 2002							       BSD

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 appropriately.

ERRORS

       EBADF  sockfd is not a valid descriptor.

       EINVAL An invalid value was specified in how (but see BUGS).

       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.

BUGS

       As  currently implemented, checks for the validity of how are done in domain-specific code, and not all domains perform these checks.  Most
       notably, UNIX domain sockets simply ignore invalid values; this may change in the future.

SEE ALSO

       connect(2), socket(2), socket(7)

COLOPHON

       This page is part of release 3.44 of the Linux man-pages project.  A description of the project, and information about reporting bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.

Linux								    2012-09-06							       SHUTDOWN(2)