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packer/alpine-linux: serial console support review

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This does not change much, but provides some more kernel diagnostics to the
serial console, and even though it was not broken, returns getty to the role of
terminal handler (always with passwordless autologin).
This commit is contained in:
Gianluca Merlo 2022-11-21 23:13:26 +01:00
parent 45c08a4481
commit 8388697eb5
1 changed files with 15 additions and 3 deletions
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18
packer/alpine-linux/scripts/cli.sh
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@ -1,5 +1,17 @@
# use serial console
sed -i 's/\(APPEND .*\)/\1 console=ttyS0/' /boot/extlinux.conf
#!/bin/sh
set -e
# use serial console and remove quiet
sed -i 's/\(APPEND .*\)/\1 console=tty0 console=ttyS0,115200 earlyprintk=ttyS0,115200 consoleblank=0/' /boot/extlinux.conf
sed -i '/\(APPEND .*\)/s/[[:space:]]*quiet[[:space:]]*/ /g' /boot/extlinux.conf
# autologin on serial console
sed -i 's/^ttyS0.*/ttyS0::respawn:\/bin\/login -f root/' /etc/inittab
cat <<'EOF' | tee /usr/local/bin/rootlogin
#!/bin/sh
exec /bin/login -f root
EOF
chmod +x /usr/local/bin/rootlogin
#/sbin/getty -L ttyS0 115200 vt100
sed -i 's/^ttyS0.*/ttyS0::respawn:\/sbin\/getty -n -l \/usr\/local\/bin\/rootlogin -L ttyS0 115200 vt100/' /etc/inittab