The Gigaset M101 exhibits particularly awkward and confusing behaviour
when the serial line speed isn't set to what the device expects:
Configuration mode detects the used speed and works anyway, but data
mode silently fails. Troubleshooting this is enormously time-consuming.
Spare the users this trouble by setting the line speed and format to
these devices' factory default values as long as the command line
doesn't say otherwise.
Signed-off-by: Tilman Schmidt <tilman@xxxxxxx>
---
sys-utils/ldattach.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/sys-utils/ldattach.c b/sys-utils/ldattach.c
index bd4fadd..99db32e 100644
--- a/sys-utils/ldattach.c
+++ b/sys-utils/ldattach.c
@@ -366,6 +366,15 @@ int main(int argc, char **argv)
if (ldisc < 0)
ldisc = strtos32_or_err(argv[optind], _("invalid line discipline argument"));
+ /* ldisc specific option settings */
+ if (ldisc == N_GIGASET_M101) {
+ /* device specific defaults for line speed and data format */
+ if (speed == 0) speed = 115200;
+ if (bits == '-') bits = '8';
+ if (parity == '-') parity = 'n';
+ if (stop == '-') stop = '1';
+ }
+
/* open device */
dev = argv[optind + 1];
if ((tty_fd = open(dev, O_RDWR | O_NOCTTY)) < 0)
@@ -448,12 +457,13 @@ int main(int argc, char **argv)
}
}
- /* Attach the line discpline. */
+ /* Attach the line discipline. */
if (ioctl(tty_fd, TIOCSETD, &ldisc) < 0)
err(EXIT_FAILURE, _("cannot set line discipline"));
dbg("line discipline set to %d", ldisc);
+ /* ldisc specific post-attach actions */
if (ldisc == N_GSM0710)
gsm0710_set_conf(tty_fd);
--
1.9.2.459.g68773ac
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