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

12       shutdown — shut down socket send and receive operations
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SYNOPSIS

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

20       The shutdown() function shall cause all or part of a  full-duplex  con‐
21       nection  on the socket associated with the file descriptor socket to be
22       shut down.
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24       The shutdown() function takes the following arguments:
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26       socket      Specifies the file descriptor of the socket.
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28       how         Specifies the type of shutdown. The values are as follows:
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30                   SHUT_RD     Disables further receive operations.
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32                   SHUT_WR     Disables further send operations.
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34                   SHUT_RDWR   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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56       The shutdown() function may fail if:
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58       ENOBUFS
59              Insufficient resources were available in the system  to  perform
60              the operation.
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62       The following sections are informative.
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EXAMPLES

65       None.
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APPLICATION USAGE

68       None.
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RATIONALE

71       None.
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FUTURE DIRECTIONS

74       None.
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SEE ALSO

77       getsockopt(), pselect(), read(), recv(), recvfrom(), recvmsg(), send(),
78       sendto(), setsockopt(), socket(), write()
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80       The Base Definitions volume of POSIX.1‐2017, <sys_socket.h>
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83       Portions of this text are reprinted and reproduced in  electronic  form
84       from  IEEE Std 1003.1-2017, Standard for Information Technology -- Por‐
85       table Operating System Interface (POSIX), The Open Group Base  Specifi‐
86       cations  Issue  7, 2018 Edition, Copyright (C) 2018 by the Institute of
87       Electrical and Electronics Engineers, Inc and The Open Group.   In  the
88       event of any discrepancy between this version and the original IEEE and
89       The Open Group Standard, the original IEEE and The Open Group  Standard
90       is  the  referee document. The original Standard can be obtained online
91       at http://www.opengroup.org/unix/online.html .
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93       Any typographical or formatting errors that appear  in  this  page  are
94       most likely to have been introduced during the conversion of the source
95       files to man page format. To report such errors,  see  https://www.ker‐
96       nel.org/doc/man-pages/reporting_bugs.html .
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100IEEE/The Open Group                  2017                         SHUTDOWN(3P)
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