fprintf(stderr, " -b <btr> (set bit time register value)\n");
fprintf(stderr, " -d (only detach line discipline)\n");
fprintf(stderr, " -w (attach - wait for keypess - detach)\n");
+ fprintf(stderr, " -n <name> (assign created netdevice name)\n");
fprintf(stderr, "\nExamples:\n");
fprintf(stderr, "slcan_attach -w -o -s6 -c /dev/ttyS1\n");
fprintf(stderr, "slcan_attach /dev/ttyS1\n");
fprintf(stderr, "slcan_attach -d /dev/ttyS1\n");
+ fprintf(stderr, "slcan_attach -w -n can15 /dev/ttyS1\n");
fprintf(stderr, "\n");
exit(1);
}
char *btr = NULL;
char buf[IFNAMSIZ+1];
char *tty;
+ char *name = NULL;
int opt;
- while ((opt = getopt(argc, argv, "l:dwocs:b:?")) != -1) {
+ while ((opt = getopt(argc, argv, "l:dwocs:b:n:?")) != -1) {
switch (opt) {
case 'l':
fprintf(stderr, "Ignored option '-l'\n");
print_usage(argv[0]);
break;
+ case 'n':
+ name = optarg;
+ if (strlen(name) > IFNAMSIZ-1)
+ print_usage(argv[0]);
+ break;
+
case '?':
default:
print_usage(argv[0]);
write(fd, buf, strlen(buf));
}
+ /* set slcan line discipline on given tty */
if (ioctl (fd, TIOCSETD, &ldisc) < 0) {
perror("ioctl TIOCSETD");
exit(1);
}
+ /* retrieve the name of the created CAN netdevice */
if (ioctl (fd, SIOCGIFNAME, buf) < 0) {
perror("ioctl SIOCGIFNAME");
exit(1);
- } else
- printf("attached tty %s to netdevice %s\n", tty, buf);
+ }
+
+ printf("attached tty %s to netdevice %s\n", tty, buf);
+
+ /* try to rename the created device if requested */
+ if (name) {
+ struct ifreq ifr;
+ int s = socket(PF_INET, SOCK_DGRAM, 0);
+
+ printf("rename netdevice %s to %s ... ", buf, name);
+
+ if (s < 0)
+ perror("socket for interface rename");
+ else {
+ strncpy (ifr.ifr_name, buf, IFNAMSIZ);
+ strncpy (ifr.ifr_newname, name, IFNAMSIZ);
+
+ if (ioctl(s, SIOCSIFNAME, &ifr) < 0)
+ printf("failed!\n");
+ else
+ printf("ok.\n");
+
+ close(s);
+ }
+ }
}
if (waitkey) {