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alpine-linux-headless-bootstrap
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improve overlay file detection 

take name from dmesg
add suggestion for removal in banner
This commit is contained in:
macmpi 2023-05-16 09:28:58 +02:00
parent 6718b1c311
commit 1eca862849
3 changed files with 16 additions and 4 deletions
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BIN
headless.apkovl.tar.gz
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15
overlay/etc/local.d/headless.start
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@ -11,9 +11,12 @@ exec 1>/dev/console 2>&1
logger -st ${0##*/} "Alpine Linux headless bootstrap v$VERSION by macmpi" logger -st ${0##*/} "Alpine Linux headless bootstrap v$VERSION by macmpi"
mkdir /tmp/.trash mkdir /tmp/.trash
ovlpath=$( find /media -maxdepth 2 -type d -path '*/.*' -prune -o -type f -name *.apkovl.tar.gz -exec dirname {} \; | head -1 )
# Help randomess for wpa_supplicant and ssh server # grab used ovl filename from dmesg
ovl="$( dmesg | grep -o 'Loading user settings from .*:' | awk '{print $5}' | sed 's/:.*$//' )"
ovlpath="$( dirname "$ovl" )"
# Help randomness for wpa_supplicant and ssh server
rc-service seedrng start rc-service seedrng start
## Setup Network interfaces ## Setup Network interfaces
@ -95,10 +98,18 @@ cat <<-EOF >> /etc/ssh/sshd_config
EOF EOF
# Banner file # Banner file
warn=""
grep -q "${ovlpath}.*[[:space:]]ro[[:space:],]" /proc/mounts; RO=$?
[ "$RO" -eq "0" ] && warn="(remount partition read-write!)"
cat <<-EOF > /tmp/.trash/banner cat <<-EOF > /tmp/.trash/banner
Alpine Linux headless bootstrap v$VERSION by macmpi Alpine Linux headless bootstrap v$VERSION by macmpi
You may want to delete/rename overlay before next reboot ${warn}:
$ovl
(can be done automatically with unattended script - see sample snippet)
EOF EOF
# Bundled temporary keys are moved in RAM /tmp so they won't be stored # Bundled temporary keys are moved in RAM /tmp so they won't be stored

5
sample_unattended.sh
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@ -14,12 +14,13 @@ sleep 60
## This snippet removes apkovl file on volume after initial boot ## This snippet removes apkovl file on volume after initial boot
ovlpath=$( find /media -maxdepth 2 -type d -path '*/.*' -prune -o -type f -name *.apkovl.tar.gz -exec dirname {} \; | head -1 ) ovl="$( dmesg | grep -o 'Loading user settings from .*:' | awk '{print $5}' | sed 's/:.*$//' )"
ovlpath="$( dirname "$ovl" )"
# also works in case volume is mounted read-only # also works in case volume is mounted read-only
grep -q "${ovlpath}.*[[:space:]]ro[[:space:],]" /proc/mounts; RO=$? grep -q "${ovlpath}.*[[:space:]]ro[[:space:],]" /proc/mounts; RO=$?
[ "$RO" -eq "0" ] && mount -o remount,rw "${ovlpath}" [ "$RO" -eq "0" ] && mount -o remount,rw "${ovlpath}"
rm "${ovlpath}"/*.apkovl.tar.gz rm -f "${ovl}"
[ "$RO" -eq "0" ] && mount -o remount,ro "${ovlpath}" [ "$RO" -eq "0" ] && mount -o remount,ro "${ovlpath}"
######################################################## ########################################################