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NAME="NET-COMMON-TCPIP-MANPAGES-SHUTDOWN">shutdown</H1
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NAME="NET-COMMON-TCPIP-MANPAGES-SHUTDOWN">shutdown</H1
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>SHUTDOWN(2) System Calls Manual SHUTDOWN(2)
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>SHUTDOWN(2) System Calls Manual SHUTDOWN(2)
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NAME
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NAME
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shutdown - shut down part of a full-duplex connection
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shutdown - shut down part of a full-duplex connection
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SYNOPSIS
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SYNOPSIS
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#include <sys/types.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <sys/socket.h>
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int
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int
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shutdown(int s, int how);
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shutdown(int s, int how);
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DESCRIPTION
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DESCRIPTION
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The shutdown() call causes all or part of a full-duplex connection on the
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The shutdown() call causes all or part of a full-duplex connection on the
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socket associated with s to be shut down. If how is SHUT_RD, further
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socket associated with s to be shut down. If how is SHUT_RD, further
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receives will be disallowed. If how is SHUT_WR, further sends will be
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receives will be disallowed. If how is SHUT_WR, further sends will be
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disallowed. If how is SHUT_RDWR, further sends and receives will be dis-
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disallowed. If how is SHUT_RDWR, further sends and receives will be dis-
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allowed.
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allowed.
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RETURN VALUES
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RETURN VALUES
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A 0 is returned if the call succeeds, -1 if it fails.
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A 0 is returned if the call succeeds, -1 if it fails.
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ERRORS
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ERRORS
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The call succeeds unless:
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The call succeeds unless:
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[EINVAL] how is not SHUT_RD, SHUT_WR, or SHUT_RDWR.
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[EINVAL] how is not SHUT_RD, SHUT_WR, or SHUT_RDWR.
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[EBADF] s is not a valid descriptor.
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[EBADF] s is not a valid descriptor.
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[ENOTSOCK] s is a file, not a socket.
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[ENOTSOCK] s is a file, not a socket.
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[ENOTCONN] The specified socket is not connected.
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[ENOTCONN] The specified socket is not connected.
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SEE ALSO
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SEE ALSO
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connect(2), socket(2)
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connect(2), socket(2)
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HISTORY
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HISTORY
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The shutdown() function call appeared in 4.2BSD. The how arguments used
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The shutdown() function call appeared in 4.2BSD. The how arguments used
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to be simply 0, 1, and 2, but now have named values as specified by
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to be simply 0, 1, and 2, but now have named values as specified by
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X/Open Portability Guide Issue 4 (``XPG4'').
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X/Open Portability Guide Issue 4 (``XPG4'').
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BSD June 4, 1993 BSD
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BSD June 4, 1993 BSD
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