Node:Sending Data, Next:Receiving Data, Up:Transferring Data
The send
function is declared in the header file
sys/socket.h
. If your flags argument is zero, you can just
as well use write
instead of send
; see I/O
Primitives. If the socket was connected but the connection has broken,
you get a SIGPIPE
signal for any use of send
or
write
(see Miscellaneous Signals).
int send (int socket, void *buffer, size_t size, int flags) | Function |
The send function is like write , but with the additional
flags flags. The possible values of flags are described
in Socket Data Options.
This function returns the number of bytes transmitted, or -1 on
failure. If the socket is nonblocking, then send (like
write ) can return after sending just part of the data.
See File Status Flags, for information about nonblocking mode.
Note, however, that a successful return value merely indicates that
the message has been sent without error, not necessarily that it has
been received without error.
The following errno error conditions are defined for this function:
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