LinuxQuestions.org - [SOLVED] How to prevent serial devices from acting as a console?

LinuxQuestions.org (/questions/)

- Linux - Embedded & Single-board computer (https://www.linuxquestions.org/questions/linux-embedded-and-single-board-computer-78/)

- - How to prevent serial devices from acting as a console? (https://www.linuxquestions.org/questions/linux-embedded-and-single-board-computer-78/how-to-prevent-serial-devices-from-acting-as-a-console-4175497689/)

How to prevent serial devices from acting as a console?

Hi guys,

i am working on an embedded Board running Linux. It has 3 serial devices (/dev/ttymxc0, /dev/ttymxc1, ...).

I'm using /dev/ttymxc0 to administrate the board using a terminal emulator (putty) and want to use the other two to talk to some hardware. The problem is:
Apparently the operating system has taken over the two spare devices and tries to send a login prompt over them, which is garbage data for the hardware I'm talking to. How can I stop this from happening and just use them to send raw data?

I already tried to set raw mode (stty -F /dev/ttymxc1 raw), but no luck.

Thanks for any advice

David

PS: Please tell me if you need more information to answer my question.

The program that runs on a serial line to prompt for login is named 'getty'. There may be a service which automatically spawns getty for each serial line, so depending on what OS you are running you will have to configure it to blacklist your other lines.

Thanks smallpond for the answer, it was spot on. I just had to modify /etc/inittab, which spawned getty processes on the other two devices.

PS: If anyone wonders, I am using Freescale Linux.