1SHUTDOWN(2)                Linux Programmer's Manual               SHUTDOWN(2)
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NAME

6       shutdown - shut down part of a full-duplex connection
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SYNOPSIS

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

14       The  shutdown()  call causes all or part of a full-duplex connection on
15       the socket associated with sockfd to be shut down.  If how is  SHUT_RD,
16       further  receptions  will  be  disallowed.   If how is SHUT_WR, further
17       transmissions will be disallowed.  If how is SHUT_RDWR, further  recepÔÇÉ
18       tions and transmissions will be disallowed.
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RETURN VALUE

21       On  success,  zero is returned.  On error, -1 is returned, and errno is
22       set appropriately.
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ERRORS

25       EBADF  sockfd is not a valid file descriptor.
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27       EINVAL An invalid value was specified in how (but see BUGS).
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29       ENOTCONN
30              The specified socket is not connected.
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32       ENOTSOCK
33              The file descriptor sockfd does not refer to a socket.
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CONFORMING TO

36       POSIX.1-2001,  POSIX.1-2008,  4.4BSD  (shutdown()  first  appeared   in
37       4.2BSD).
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NOTES

40       The  constants  SHUT_RD,  SHUT_WR,  SHUT_RDWR  have  the value 0, 1, 2,
41       respectively, and are defined in <sys/socket.h> since glibc-2.1.91.
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BUGS

44       Checks for the validity of how are done in  domain-specific  code,  and
45       before Linux 3.7 not all domains performed these checks.  Most notably,
46       UNIX domain sockets simply ignored invalid values.   This  problem  was
47       fixed for UNIX domain sockets in Linux 3.7.
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SEE ALSO

50       connect(2), socket(2), socket(7)
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COLOPHON

53       This  page  is  part of release 4.15 of the Linux man-pages project.  A
54       description of the project, information about reporting bugs,  and  the
55       latest     version     of     this    page,    can    be    found    at
56       https://www.kernel.org/doc/man-pages/.
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60Linux                             2016-03-15                       SHUTDOWN(2)
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