Update program_console_speed() in rc.local #22458#1811
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yxieca
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…tically (#26380) #### Why I did it src/sonic-sairedis ``` * 58c20a05 - (HEAD -> master, origin/master, origin/HEAD) vpp: track CRM counters for routes (Azure#1811) (5 hours ago) [yue-fred-gao] * 133fdcd4 - syncd: Add -W flag for platform specific watchdog timeout during initialization (Azure#1751) (9 hours ago) [Bojun Feng] ``` #### How I did it #### How to verify it #### Description for the changelog
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This is the double commit of sonic-net/sonic-buildimage#22458
Why I did it
The --keep-baud option in agetty allows it to cycle through a set of baud rates (like 115200,57600,38400,9600) when it receives a break signal. This feature helps ensure that agetty can seamlessly adjust to different terminal speeds, enhancing compatibility across various setups.
Challenges with the sed Command:
Our current sed command (program_console_speed in rc.local ) is intended to update the baud rates in the serial-getty@.service based on the CONSOLE_SPEED variable. However, the command is not working as planned because the pattern --keep-baud .* %I doesn't match when %I isn't part of the file's content.
How I did it
To make the sed command more effective, we can simplify the matching pattern to focus solely on the baud rate list:
sed -i "s|--keep-baud .* -| $CONSOLE_SPEED -|g" /lib/systemd/system/serial-getty@.service
This adjustment should ensure that the command correctly updates the baud rate settings.
How to verify it
Verify serial-getty@.service before and after modifying rc.local
Before update
ExecStart=-/sbin/agetty -o '-p -- \u' --keep-baud 115200,57600,38400,9600 - $TERM
After Update
ExecStart=-/sbin/agetty -o '-p -- \u' 115200 - $TERM
Tested branch (Please provide the tested image version)
202501
Note: sonic-net/sonic-buildimage#24506