1SHUTDOWN(P)                POSIX Programmer's Manual               SHUTDOWN(P)
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NAME

6       shutdown - shut down socket send and receive operations
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SYNOPSIS

9       #include <sys/socket.h>
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11       int shutdown(int socket, int how);
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DESCRIPTION

15       The  shutdown()  function shall cause all or part of a full-duplex con‐
16       nection on the socket associated with the file descriptor socket to  be
17       shut down.
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19       The shutdown() function takes the following arguments:
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21       socket Specifies the file descriptor of the socket.
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23       how    Specifies the type of shutdown. The values are as follows:
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25       SHUT_RD
26              Disables further receive operations.
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28       SHUT_WR
29              Disables further send operations.
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31       SHUT_RDWR
32              Disables further send and receive operations.
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36       The  shutdown() function disables subsequent send and/or receive opera‐
37       tions on a socket, depending on the value of the how argument.
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RETURN VALUE

40       Upon successful completion, shutdown() shall return  0;  otherwise,  -1
41       shall be returned and errno set to indicate the error.
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ERRORS

44       The shutdown() function shall fail if:
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46       EBADF  The socket argument is not a valid file descriptor.
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48       EINVAL The how argument is invalid.
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50       ENOTCONN
51              The socket is not connected.
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53       ENOTSOCK
54              The socket argument does not refer to a socket.
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57       The shutdown() function may fail if:
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59       ENOBUFS
60              Insufficient  resources  were available in the system to perform
61              the operation.
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64       The following sections are informative.
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EXAMPLES

67       None.
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APPLICATION USAGE

70       None.
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RATIONALE

73       None.
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FUTURE DIRECTIONS

76       None.
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SEE ALSO

79       getsockopt() , read() , recv() , recvfrom() , recvmsg()  ,  select()  ,
80       send()  , sendto() , setsockopt() , socket() , write() , the Base Defi‐
81       nitions volume of IEEE Std 1003.1-2001, <sys/socket.h>
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84       Portions of this text are reprinted and reproduced in  electronic  form
85       from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
86       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
87       Specifications  Issue  6,  Copyright  (C) 2001-2003 by the Institute of
88       Electrical and Electronics Engineers, Inc and The Open  Group.  In  the
89       event of any discrepancy between this version and the original IEEE and
90       The Open Group Standard, the original IEEE and The Open Group  Standard
91       is  the  referee document. The original Standard can be obtained online
92       at http://www.opengroup.org/unix/online.html .
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96IEEE/The Open Group                  2003                          SHUTDOWN(P)
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