1SHUTDOWN(3P)               POSIX Programmer's Manual              SHUTDOWN(3P)
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PROLOG

6       This  manual  page is part of the POSIX Programmer's Manual.  The Linux
7       implementation of this interface may differ (consult the  corresponding
8       Linux  manual page for details of Linux behavior), or the interface may
9       not be implemented on Linux.
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NAME

13       shutdown — shut down socket send and receive operations
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SYNOPSIS

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

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

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

45       The shutdown() function shall fail if:
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47       EBADF  The socket argument is not a valid file descriptor.
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49       EINVAL The how argument is invalid.
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51       ENOTCONN
52              The socket is not connected.
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54       ENOTSOCK
55              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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63       The following sections are informative.
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EXAMPLES

66       None.
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APPLICATION USAGE

69       None.
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RATIONALE

72       None.
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FUTURE DIRECTIONS

75       None.
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SEE ALSO

78       getsockopt(), pselect(), read(), recv(), recvfrom(), recvmsg(), send(),
79       sendto(), setsockopt(), socket(), write()
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81       The Base Definitions volume of POSIX.1‐2008, <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, 2013 Edition, Standard for Information Technology
86       -- Portable Operating System Interface (POSIX),  The  Open  Group  Base
87       Specifications Issue 7, Copyright (C) 2013 by the Institute of Electri‐
88       cal and Electronics Engineers,  Inc  and  The  Open  Group.   (This  is
89       POSIX.1-2008  with  the  2013  Technical Corrigendum 1 applied.) In the
90       event of any discrepancy between this version and the original IEEE and
91       The  Open Group Standard, the original IEEE and The Open Group Standard
92       is the referee document. The original Standard can be  obtained  online
93       at http://www.unix.org/online.html .
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95       Any  typographical  or  formatting  errors that appear in this page are
96       most likely to have been introduced during the conversion of the source
97       files  to  man page format. To report such errors, see https://www.ker‐
98       nel.org/doc/man-pages/reporting_bugs.html .
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102IEEE/The Open Group                  2013                         SHUTDOWN(3P)
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