X-Git-Url: http://rtime.felk.cvut.cz/gitweb/lincan.git/blobdiff_plain/fb2dd0f20bd6264291dccb5e97609a23cae2fd1a..04ac67cc3cac14cd601daacd0592121ec0b84012:/lincan/src/read_rtl.c

diff --git a/lincan/src/read_rtl.c b/lincan/src/read_rtl.c
index 807f572..a08521b 100644
--- a/lincan/src/read_rtl.c
+++ b/lincan/src/read_rtl.c
@@ -1,11 +1,36 @@
-/* read.c
- * Linux CAN-bus device driver.
- * Written by Arnaud Westenberg email:arnaud@wanadoo.nl
- * Rewritten for new CAN queues by Pavel Pisa - OCERA team member
- * email:pisa@cmp.felk.cvut.cz
- * This software is released under the GPL-License.
- * Version lincan-0.2  9 Jul 2003
- */
+/**************************************************************************/
+/* File: read_rtl.c - RT-Linux variant of read systemcall                 */
+/*                                                                        */
+/* LinCAN - (Not only) Linux CAN bus driver                               */
+/* Copyright (C) 2002-2009 DCE FEE CTU Prague <http://dce.felk.cvut.cz>   */
+/* Copyright (C) 2002-2009 Pavel Pisa <pisa@cmp.felk.cvut.cz>             */
+/* Funded by OCERA and FRESCOR IST projects                               */
+/* Based on CAN driver code by Arnaud Westenberg <arnaud@wanadoo.nl>      */
+/*                                                                        */
+/* LinCAN is free software; you can redistribute it and/or modify it      */
+/* under terms of the GNU General Public License as published by the      */
+/* Free Software Foundation; either version 2, or (at your option) any    */
+/* later version.  LinCAN is distributed in the hope that it will be      */
+/* useful, but WITHOUT ANY WARRANTY; without even the implied warranty    */
+/* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU    */
+/* General Public License for more details. You should have received a    */
+/* copy of the GNU General Public License along with LinCAN; see file     */
+/* COPYING. If not, write to the Free Software Foundation, 675 Mass Ave,  */
+/* Cambridge, MA 02139, USA.                                              */
+/*                                                                        */
+/* To allow use of LinCAN in the compact embedded systems firmware        */
+/* and RT-executives (RTEMS for example), main authors agree with next    */
+/* special exception:                                                     */
+/*                                                                        */
+/* Including LinCAN header files in a file, instantiating LinCAN generics */
+/* or templates, or linking other files with LinCAN objects to produce    */
+/* an application image/executable, does not by itself cause the          */
+/* resulting application image/executable to be covered by                */
+/* the GNU General Public License.                                        */
+/* This exception does not however invalidate any other reasons           */
+/* why the executable file might be covered by the GNU Public License.    */
+/* Publication of enhanced or derived LinCAN files is required although.  */
+/**************************************************************************/
 
 #ifdef CAN_WITH_RTL
 
@@ -17,8 +42,8 @@
 #include "../include/can_iortl.h"
 
 /* This is the 'Normal' read handler for normal transmission messages */
-static inline 
-ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl, 
+static inline
+ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl,
 			char *buffer, size_t length)
 {
 	int ret;
@@ -26,7 +51,7 @@ ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl,
 	int bytes_to_copy;
 	struct canque_edge_t *qedge;
 	struct canque_slot_t *slot;
-	
+
 	ret=canque_test_outslot(qends, &qedge, &slot);
 	if(ret<0){
 		if (nonblock_fl) {
@@ -45,7 +70,7 @@ ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl,
 	*(msg_buff++)=slot->msg;
 	canque_free_outslot(qends, qedge, slot);
 	bytes_to_copy = length-sizeof(struct canmsg_t);
-	
+
 	while (bytes_to_copy > 0) {
 		ret=canque_test_outslot(qends, &qedge, &slot);
 		if(ret<0)
@@ -62,7 +87,7 @@ ssize_t can_std_read_rtl(struct canque_ends_t *qends, int nonblock_fl,
 ssize_t can_read_rtl_posix(struct rtl_file *fptr, char *buffer,
 				size_t length, loff_t *ppos)
 {
-	struct canuser_t *canuser = 
+	struct canuser_t *canuser =
 		(struct canuser_t *)can_get_rtl_file_private_data(fptr);
 	struct canque_ends_t *qends;
 	int      ret;