debian man page for buffer_flush

buffer_flush(3) 					     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 encoun-
       ters 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)