debian man page for iob_bytesleft

iob_bytesleft(3)					     Library Functions Manual						  iob_bytesleft(3)

NAME
       iob_bytesleft - how many bytes are still to be sent?

SYNTAX
       #include <iob.h>

       uint64 iob_bytesleft(const io_batch* b);

DESCRIPTION
       iob_bytesleft  returns  the  number of bytes that still need to be sent in this IO batch.  If you just want to see whether you need to call
       iob_send again, there is no advantage in this function to calling iob_send directly and looking whether it returned 0.

SEE ALSO
       iob_send(3)

																  iob_bytesleft(3)