115 lines
3.3 KiB
C
115 lines
3.3 KiB
C
/*
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* $Id$
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*/
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/*
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* slcan_attach.c - userspace tool for serial line CAN interface driver SLCAN
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*
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* Copyright (c) 2002-2007 Volkswagen Group Electronic Research
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of Volkswagen nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* Alternatively, provided that this notice is retained in full, this
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* software may be distributed under the terms of the GNU General
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* Public License ("GPL") version 2, in which case the provisions of the
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* GPL apply INSTEAD OF those given above.
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*
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* The provided data structures and external interfaces from this code
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* are not restricted to be used by modules with a GPL compatible license.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
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* DAMAGE.
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*
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* Send feedback to <socketcan-users@lists.berlios.de>
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*
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <sys/ioctl.h>
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#include <linux/tty.h> /* thanks for cleanup since 2.6.21 */
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//#include <asm/termios.h> /* ldiscs for each arch up to 2.6.20 */
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#ifndef N_SLCAN
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#error Your kernel includes do not provide the needed line discipline.
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#error This is a normal behaviour for Kernel versions < v2.6.25 .
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#error You might update or patch your kernel OR you can just ignore
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#error this compilation failure if you do not need the slcan driver.
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#endif
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void usage(char *name)
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{
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fprintf(stderr, "Usage: %s [-d] [-l ldisc] tty\n", name);
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exit(1);
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}
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int main(int argc, char **argv)
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{
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int fd;
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int ldisc = N_SLCAN; /* default */
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int detach = 0;
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char *tty;
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int opt;
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while ((opt = getopt(argc, argv, "l:d")) != -1) {
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switch (opt) {
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case 'l':
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ldisc = atoi(optarg);
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break;
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case 'd':
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detach = 1;
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break;
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default:
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usage(argv[0]);
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break;
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}
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}
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if (argc - optind != 1)
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usage(argv[0]);
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tty = argv[optind];
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if ((fd = open (tty, O_RDONLY | O_NOCTTY)) < 0) {
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perror(tty);
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exit(1);
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}
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if (detach)
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ldisc = N_TTY;
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if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
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perror("ioctl");
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exit(1);
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}
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close(fd);
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return 0;
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}
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