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NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | CONFORMING TO | NOTES | BUGS | SEE ALSO | COLOPHON |
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SHUTDOWN(2) Linux Programmer's Manual SHUTDOWN(2)
shutdown - shut down part of a full-duplex connection
#include <sys/socket.h>
int shutdown(int sockfd, int how);
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.
On success, zero is returned. On error, -1 is returned, and
errno is set to indicate the error.
EBADF sockfd is not a valid file 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.
POSIX.1-2001, POSIX.1-2008, 4.4BSD (shutdown() first appeared in
4.2BSD).
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.
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.
close(2), connect(2), socket(2), socket(7)
This page is part of release 5.13 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
https://www.kernel.org/doc/man-pages/.
Linux 2021-03-22 SHUTDOWN(2)
Pages that refer to this page: close(2), io_uring_enter2(2), io_uring_enter(2), recv(2), send(2), socket(2), socketcall(2), syscalls(2), io_uring_prep_shutdown(3), sd_listen_fds(3), systemd.socket(5), signal-safety(7), sock_diag(7), socket(7), lsof(8)
Copyright and license for this manual page
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