• 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.

  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.
• SEE ALSO
  
  connect(2) , socket(2) , socket(7)
• COLOPHON
  
  This page is part of release 3.19 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/.

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