connect(2)                     DG/UX R4.11MU05                    connect(2)


NAME
       connect - initiate a connection on a socket

SYNOPSIS
       #include <sys/socket.h>

       int    connect (s, name, namelen)
       int    s;
       const struct sockaddr * name;
       int    namelen;

   where:
       s         The file descriptor of a socket to connect

       name      Name of peer or listening socket through which the
                 connection will be made

       namelen   Length of name (bytes)

DESCRIPTION
       The parameter s is a socket.  If it is of type SOCK_DGRAM, then this
       call specifies the peer to which datagrams are to be sent; if it is
       of type SOCK_STREAM, then this call tries to make a connection
       through a listening socket specified by name, which is an address in
       the communications space of the socket.

ACCESS CONTROL
       None.  See the related documentation on the individual communication
       protocol for specific domain interpretations.

RETURN VALUE
       0      Completed successfully, a connection has been established.

       -1     An error occurred.  errno is set to indicate the error.

DIAGNOSTICS
       Errno may be set to one of the following error codes:

       EBADF          s is not active, valid descriptor.

       ENOTSOCK       s is a descriptor for a file, not a socket.

       EADDRNOTAVAIL  The specified address is not available on the
                      specified host.

       EAFNOSUPPORT   Addresses in the specified address family cannot be
                      used with this socket.

       EISCONN        The socket is already connected.

       ETIMEDOUT      Connection establishment timed out without
                      establishing a connection.

       ECONNREFUSED   The attempt to connect was rejected by foreign host.

       ECONNRESET     The remote peer has accepted and then aborted the
                      connection before the connect(2) call could complete.

       ENETUNREACH    The network isn't reachable from this host.

       EADDRINUSE     A connection already exists using the specified remote
                      address to an endpoint with the same local address as
                      the socket argument.

       EFAULT         The name parameter specifies an area outside the
                      process address space.

       EAGAIN         The socket is non-blocking and the connection cannot
                      be completed immediately.  This errno is returned on
                      the 88K platform only, other platforms return
                      EINPROGRESS.

       EINPROGRESS    The socket is non-blocking and the connection cannot
                      be completed immediately. The 88K platform returns
                      EAGAIN instead of EINPROGRESS.  EINPROGRESS is the BSD
                      de-facto standard errno. EAGAIN is maintined on the
                      88K platform for application backward compability.

       ENOBUFS        No internal buffers available.

       EINVAL         Invalid system call argument (probably name length).

       EALREADY       The connect operation has already been started on this
                      socket and has not yet finished.  (An earlier call
                      must have returned EAGAIN or EINTR.)

       EINTR          System call returned due to interrupt.

       EOPNOTSUPP     The socket is in the listen state.

SEE ALSO
       accept(2), listen(2), select(2), socket(2), getsockname(2).


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