httpd_write_fully
if ( httpd_write_fully( wfd, &(hc->read_buf[hc->checked_idx]), c ) != c )
if ( httpd_write_fully( wfd, buf, r ) != r )
(void) httpd_write_fully( hc->conn_fd, buf, strlen( buf ) );
(void) httpd_write_fully( hc->conn_fd, headers, headers_len );
if ( httpd_write_fully( hc->conn_fd, buf, r ) != r )
(void) httpd_write_fully( hc->conn_fd, hc->response, hc->responselen );
extern int httpd_write_fully( int fd, const char* buf, size_t nbytes );