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slcan: added listen-only flag

pull/10/head
Maximilian Pachl 2015-10-11 08:48:24 +02:00
parent 0e3ff3b315
commit dd13fc6eab
1 changed files with 10 additions and 3 deletions
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13
slcan_attach.c
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@ -58,6 +58,7 @@ void print_usage(char *prg)
{ {
fprintf(stderr, "\nUsage: %s [options] tty\n\n", prg); fprintf(stderr, "\nUsage: %s [options] tty\n\n", prg);
fprintf(stderr, "Options: -o (send open command 'O\\r')\n"); 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, " -c (send close command 'C\\r')\n");
fprintf(stderr, " -f (read status flags with 'F\\r' to reset error states)\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"); fprintf(stderr, " -s <speed> (set CAN speed 0..8)\n");
@ -81,6 +82,7 @@ int main(int argc, char **argv)
int detach = 0; int detach = 0;
int waitkey = 0; int waitkey = 0;
int send_open = 0; int send_open = 0;
int send_listen = 0;
int send_close = 0; int send_close = 0;
int send_read_status_flags = 0; int send_read_status_flags = 0;
char *speed = NULL; char *speed = NULL;
@ -90,10 +92,10 @@ int main(int argc, char **argv)
char *name = NULL; char *name = NULL;
int opt; int opt;
while ((opt = getopt(argc, argv, "l:dwocfs:b:n:?")) != -1) { while ((opt = getopt(argc, argv, "ldwocfs:b:n:?")) != -1) {
switch (opt) { switch (opt) {
case 'l': case 'l':
fprintf(stderr, "Ignored option '-l'\n"); send_listen = 1;
break; break;
case 'd': case 'd':
@ -168,7 +170,12 @@ int main(int argc, char **argv)
write(fd, buf, strlen(buf)); write(fd, buf, strlen(buf));
} }
if (send_open) { /* prefer listen-only over normal open */
if (send_listen) {
sprintf(buf, "L\r");
write(fd, buf, strlen(buf));
} else if (send_open) {
sprintf(buf, "O\r"); sprintf(buf, "O\r");
write(fd, buf, strlen(buf)); write(fd, buf, strlen(buf));
} }