shutdown(2) — Linux manual page


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

NAME         top

       shutdown - shut down part of a full-duplex connection

SYNOPSIS         top

       #include <sys/socket.h>

       int shutdown(int sockfd, int how);

DESCRIPTION         top

       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         top

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

ERRORS         top

       EBADF  sockfd is not a valid file descriptor.

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

              The specified socket is not connected.

              The file descriptor sockfd does not refer to a socket.

CONFORMING TO         top

       POSIX.1-2001, POSIX.1-2008, 4.4BSD (shutdown() first appeared in

NOTES         top

       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         top

       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         top

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

COLOPHON         top

       This page is part of release 5.09 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                            2018-04-30                      SHUTDOWN(2)

Pages that refer to this page: close(2)recv(2)recvfrom(2)recvmsg(2)send(2)sendmsg(2)sendto(2)socket(2)socketcall(2)syscalls(2)systemd.socket(5)signal-safety(7)sock_diag(7)socket(7)lsof(8)