SEND(2)                 COMMAND REFERENCE                 SEND(2)



NAME
     send, sendto, sendmsg - send a message from a socket

SYNOPSIS
     #include <sys/types.h>
     #include <sys/socket.h>

     cc = send(s, msg, len, flags)
     int cc, s;
     char *msg;
     int len, flags;

     cc = sendto(s, msg, len, flags, to, tolen)
     int cc, s;
     char *msg;
     int len, flags;
     struct sockaddr *to;
     int tolen;

     cc = sendmsg(s, msg, flags)
     int cc, s;
     struct msghdr msg[];
     int flags;

DESCRIPTION
     Send, sendto, and sendmsg are used to transmit a message to
     another socket.  Send may be used only when the socket is in
     a connected state, while sendto and sendmsg may be used at
     any time.

     The address of the target is given by to with tolen
     specifying its size.  The length of the message is given by
     len.  If the message is too long to pass atomically through
     the underlying protocol, then the error EMSGSIZE is
     returned, and the message is not transmitted.

     No indication of failure to deliver is implicit in a send
     although return values of -1 indicate some locally detected
     errors.

     If no messages space is available at the socket to hold the
     message to be transmitted, then send normally blocks, unless
     the socket has been placed in non-blocking i/o mode.  The
     select(2) call may be used to determine when it is possible
     to send more data.

     The flags parameter may be set to MSG_OOB to send "out-of-
     band" data on sockets which support this notion (e.g.
     SOCK_STREAM).

     See recv(2) for a description of the msghdr structure.




Printed 4/6/89                                                  1

SEND(2)                 COMMAND REFERENCE                 SEND(2)



DIAGNOSTICS
     [EBADF]      An invalid descriptor was specified.

     [ENOTSOCK]   The argument s is not a socket.

     [EFAULT]     An invalid user space address was specified for
                  a parameter.

     [EMSGSIZE]   The socket requires that message be sent
                  atomically, and the size of the message to be
                  sent made this impossible.

     [EWOULDBLOCK]
                  The socket is marked non-blocking and the
                  requested operation would block.

RETURN VALUE
     The call returns the number of characters sent, or -1 if a
     local error occurred.

SEE ALSO
     recv(2) and socket(2).

































Printed 4/6/89                                                  2

%%index%%
na:240,104;
sy:344,2942;
de:3286,1763;
di:5361,629;
rv:5990,215;
se:6205,161;
%%index%%000000000111