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postmarketos-initramfs: always save logs (MR 4646)

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Always write logs to the ramdisk, adjust setup_log() to spawn "tail" to
pipe the log to the console device when PMOS_NO_OUTPUT_REDIRECT is set.

This is necessary to ensure that the initramfs logs can be extracted on
a failed boot.

Signed-off-by: Caleb Connolly <caleb@connolly.tech>
This commit is contained in:
Caleb Connolly 2023-12-18 23:50:56 +00:00
parent 190860eb5f
commit 241ade087f
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GPG key ID: 7930459FB9303217
1 changed files with 15 additions and 9 deletions
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24
main/postmarketos-initramfs/init_functions.sh
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@ -7,20 +7,26 @@ PMOS_ROOT=""
# Redirect stdout and stderr to logfile # Redirect stdout and stderr to logfile
setup_log() { setup_log() {
# Bail out if PMOS_NO_OUTPUT_REDIRECT is set local log_to_console=""
grep -q PMOS_NO_OUTPUT_REDIRECT /proc/cmdline && log_to_console="true"
echo "### postmarketOS initramfs ###" echo "### postmarketOS initramfs ###"
grep -q PMOS_NO_OUTPUT_REDIRECT /proc/cmdline && return
# Print a message about what is going on to the normal output if [ -z "$log_to_console" ]; then
echo "NOTE: All output from the initramfs gets redirected to:" echo "Add PMOS_NO_OUTPUT_REDIRECT to your kernel command line"
echo "/pmOS_init.log" echo "to enable initramfs logging to console (e.g. for serial)."
echo "If you want to disable this behavior (e.g. because you're" fi
echo "debugging over serial), please add this to your kernel"
echo "command line: PMOS_NO_OUTPUT_REDIRECT"
# Start redirect, print the first line again # Start redirect
exec >/pmOS_init.log 2>&1 exec >/pmOS_init.log 2>&1
echo "### postmarketOS initramfs ###" echo "### postmarketOS initramfs ###"
# Pipe logs to console if PMOS_NO_OUTPUT_REDIRECT is set
if [ -n "$log_to_console" ]; then
tail -f /pmOS_init.log > /dev/console &
return
fi
} }
mount_proc_sys_dev() { mount_proc_sys_dev() {