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buffer_flush(3)       DragonFly Library Functions Manual       buffer_flush(3)

NAME
       buffer_flush - feed buffer to write function

SYNTAX
       #include <buffer.h>

       int buffer_flush(buffer* b);

DESCRIPTION
       buffer_flush feeds a string d[0], d[1], ..., d[dlen-1] to the write
       operation by calling

         op(fd,d,dlen)

       If op successfully handles one or more bytes at the beginning of the
       string, it must return the number of bytes handled; if this number is
       smaller than dlen, buffer_flush will call op again with the rest of the
       string. If op does not handle any bytes, and does not encounter an
       error, it must return 0, or return -1 with errno set to EINTR; in
       either case, buffer_flush will immediately call op again. If op
       encounters an error, it must return -1 with errno set to something
       other than EINTR; buffer_flush will pass the error to the caller.

       On success, buffer_flush returns 0. On error, buffer_flush returns -1,
       setting errno appropriately.

SEE ALSO
       buffer_init(3)

                                                               buffer_flush(3)