NAME

       buffer_flush - feed buffer to write function

SYNTAX

       #include <libowfat/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)