shutdown(2) - phpMan

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  recep-
       tions 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)