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shutdown(2) [centos man page]

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

NAME
shutdown - shut down part of a full-duplex connection SYNOPSIS
#include <sys/socket.h> int shutdown(int sockfd, int how); DESCRIPTION
The shutdown() call causes all or part of a full-duplex connection on the socket associated with sockfd to be shut down. If how is SHUT_RD, further receptions will be disallowed. If how is SHUT_WR, further transmissions will be disallowed. If how is SHUT_RDWR, further receptions and transmissions will be disallowed. RETURN VALUE
On success, zero is returned. On error, -1 is returned, and errno is set appropriately. ERRORS
EBADF sockfd is not a valid descriptor. EINVAL An invalid value was specified in how (but see BUGS). ENOTCONN The specified socket is not connected. ENOTSOCK sockfd is a file, not a socket. CONFORMING TO
POSIX.1-2001, 4.4BSD (the shutdown() function call first appeared in 4.2BSD). NOTES
The constants SHUT_RD, SHUT_WR, SHUT_RDWR have the value 0, 1, 2, respectively, and are defined in <sys/socket.h> since glibc-2.1.91. BUGS
As currently implemented, checks for the validity of how are done in domain-specific code, and not all domains perform these checks. Most notably, UNIX domain sockets simply ignore invalid values; this may change in the future. SEE ALSO
connect(2), socket(2), socket(7) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2012-09-06 SHUTDOWN(2)

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SHUTDOWN(2)						      BSD System Calls Manual						       SHUTDOWN(2)

NAME
shutdown -- shut down part of a full-duplex connection LIBRARY
Standard C Library (libc, -lc) SYNOPSIS
#include <sys/socket.h> int shutdown(int s, int how); DESCRIPTION
The shutdown() call causes all or part of a full-duplex connection on the socket associated with s to be shut down. The how argument speci- fies which part of the connection will be shut down. Permissible values are: SHUT_RD further receives will be disallowed. SHUT_WR further sends will be disallowed. SHUT_RDWR further sends and receives will be disallowed. RETURN VALUES
A 0 is returned if the call succeeds, -1 if it fails. ERRORS
The call succeeds unless: [EBADF] s is not a valid descriptor. [EINVAL] The how argument is invalid. [ENOTCONN] The specified socket is not connected. [ENOTSOCK] s is a file, not a socket. SEE ALSO
connect(2), socket(2) HISTORY
The shutdown() function call appeared in 4.2BSD. The how arguments used to be simply 0, 1, and 2, but now have named values as specified by X/Open Portability Guide Issue 4 (``XPG4''). BSD
August 18, 2002 BSD

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