shutdown —
shut
down part of a full-duplex connection
Standard C Library (libc, -lc)
#include
<sys/socket.h>
int
shutdown(
int s,
int how);
The
shutdown() call shuts down all or part of a
full-duplex connection on the socket associated with
s. If
how is
SHUT_RD, further receives are disallowed.
If
how is
SHUT_WR, further sends are disallowed. If
how is
SHUT_RDWR, further sends and receives are
disallowed.
The
how values should be defined constants.
0 is returned if the call succeeds. -1 is returned if the call fails.
The call succeeds unless one of the following conditions exists:
-
-
- [
EBADF]
- The s value is not a valid
file descriptor.
-
-
- [
ENOMEM]
- Insufficient user memory is available for the operation to
complete.
-
-
- [
ENOSR]
- Insufficient STREAMS resources are available for the
operation to complete.
-
-
- [
ENOTCONN]
- The specified socket is not connected.
-
-
- [
ENOTSOCK]
- The s value is not a
socket.
Safe
connect(3C),
socket(3C),
socket.h(3HEAD),
attributes(5)