NAME
shutdown
- shut down part of a full-duplex connection
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
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 specifies 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'') .