|| Linux Programmer's Manual
NAME shutdown - shut down part of a full-duplex connection
shutdown() call causes all or part of a full-duplex connection on the socket associated with
sockfd to be shut down. If
SHUT_RD, further receptions will be disallowed. If
SHUT_WR, further transmissions will be disallowed. If
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.
sockfd is not a valid descriptor.
An invalid value was specified in
how (but see BUGS).
The specified socket is not connected.
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_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.
COLOPHON This page is part of release 3.53 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/.