SHUTDOWN(2) - man page online | system calls

Shut down part of a full-duplex connection.

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 associ‐ ated with sockfd to be shut down. If how is SHUT_RD, further receptions will be disal‐ lowed. 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 The file descriptor sockfd does not refer to a socket.
CONFORMING TO POSIX.1-2001, POSIX.1-2008, 4.4BSD (shutdown() 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 Checks for the validity of how are done in domain-specific code, and before Linux 3.7 not all domains performed these checks. Most notably, UNIX domain sockets simply ignored invalid values. This problem was fixed for UNIX domain sockets in Linux 3.7.
SEE ALSO connect(2), socket(2), socket(7)
COLOPHON This page is part of release 4.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at
Linux 2015-12-28 SHUTDOWN(2)
This manual Reference Other manuals
shutdown(2) referred by close(2) | errno(2freebsd) | faucet(1) | hose(1) | intro(2freebsd) | iv_fd_pump(3) | lsof(8) | msocket(2viewos) | Net::SNPP::Server(3pm) | netpipes(1) | recv(2) | rights(4freebsd) | route(4freebsd) | sa(3) | send(2) | shutdown(2freebsd) | sobind(9freebsd) | socat(1) | sockdown(1) | socket(2)
refer to connect(2) | socket(2) | socket(7)