[systemd-devel] Collect logs over serial

[Jóhann B. Guðmundsson]

On 1/31/19 4:34 PM, Paul Menzel wrote:

> numbered differently


You can try to do this via tty symlinked udev rule, something along the 
lines of

# /etc/udev/rules.d/99-consistent-serial.rules

# Generic sample ( replace $FOO with something relevant to your 
environment )

SUBSYSTEM=="tty", KERNEL=="tty$FOO", SYMLINK+="ttySLAB0", 
TAG+="systemd", ENV{SYSTEMD_WANTS}+="tty-logger.service"

# Vendir spesific, ( replace idVendor,idProduct,serial for with 
something relevant to your environment

SUBSYSTEM=="tty", ATTRS{idVendor}=="VI123", ATTRS{idProduct}=="IDP123", 
ATTRS{serial}=="12345", SYMLINK+="ttySLAB0" TAG+="systemd", 
ENV{SYSTEMD_WANTS}+="tty-logger.service"

Remove any [Install] section from the tty-logger type service unit.

You might not even need the type service unit ( omitt TAG+="systemd", 
ENV{SYSTEMD_WANTS}+="tty-logger.service" ) if you create a journal 
snippet along these lines...

/etc/systemd/journald.conf.d/ttyslab0.conf

[Journal]
ForwardToConsole=yes
TTYPath=/dev/ttySLAB0
MaxLevelConsole=<your choice>

Regards

             JBG

||
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