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slcan: added listen-only flag

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Signed-off-by: Maximilian Pachl <m@ximilian.info>
Acked-by: Oliver Hartkopp <socketcan@hartkopp.net>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
This commit is contained in:
Maximilian Pachl
2015-10-15 10:18:15 +02:00
committed by Marc Kleine-Budde
parent 4a154cf3c4
commit c548eee04a
1 changed files with 11 additions and 6 deletions
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slcan_attach.c
+11 -6
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@@ -58,6 +58,7 @@ void print_usage(char *prg)
{
fprintf(stderr, "\nUsage: %s [options] tty\n\n", prg);
fprintf(stderr, "Options: -o (send open command 'O\\r')\n");
fprintf(stderr, " -l (send listen only command 'L\\r', overrides -o)\n");
fprintf(stderr, " -c (send close command 'C\\r')\n");
fprintf(stderr, " -f (read status flags with 'F\\r' to reset error states)\n");
fprintf(stderr, " -s <speed> (set CAN speed 0..8)\n");
@@ -81,6 +82,7 @@ int main(int argc, char **argv)
int detach = 0;
int waitkey = 0;
int send_open = 0;
int send_listen = 0;
int send_close = 0;
int send_read_status_flags = 0;
char *speed = NULL;
@@ -90,12 +92,8 @@ int main(int argc, char **argv)
char *name = NULL;
int opt;
while ((opt = getopt(argc, argv, "l:dwocfs:b:n:?")) != -1) {
while ((opt = getopt(argc, argv, "ldwocfs:b:n:?")) != -1) {
switch (opt) {
case 'l':
fprintf(stderr, "Ignored option '-l'\n");
break;
case 'd':
detach = 1;
break;
@@ -108,6 +106,10 @@ int main(int argc, char **argv)
send_open = 1;
break;
case 'l':
send_listen = 1;
break;
case 'c':
send_close = 1;
break;
@@ -168,7 +170,10 @@ int main(int argc, char **argv)
write(fd, buf, strlen(buf));
}
if (send_open) {
if (send_listen) {
sprintf(buf, "L\r");
write(fd, buf, strlen(buf));
} else if (send_open) {
sprintf(buf, "O\r");
write(fd, buf, strlen(buf));
}