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Hopefully keep at least 500mb of disk space on the shrunk partition

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Tom Elliott
2026-03-02 10:35:23 -06:00
parent 43e7edf786
commit 916cd69db6
1 changed files with 20 additions and 2 deletions
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22
Buildroot/board/FOG/FOS/rootfs_overlay/usr/share/fog/lib/funcs.sh
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@@ -628,9 +628,27 @@ shrinkPartition() {
tmpoutput=$(cat /tmp/tmpoutput.txt | tr -d \\0)
size=$(cat /tmp/tmpoutput.txt | tr -d \\0 | sed -n 's/.*you might resize at\s\+\([0-9]\+\).*$/\1/pi')
[[ -z $size ]] && handleError " * (${FUNCNAME[0]})\n Args Passed: $*\n\nFatal Error, Unable to determine possible ntfs size\n * To better help you debug we will run the ntfs resize\n\t but this time with full output, please wait!\n\t $(cat /tmp/tmpoutput.txt | tr -d \\0)"
local min_slack_bytes=$((500 * 1024 * 1024))
# percent-based slack, in bytes (integer math)
# NOTE: relies on your calculate() handling basic math; if calculate uses bc, this is fine too.
local sizeadd_bytes
sizeadd_bytes=$(calculate "${percent}/100*${size}")
[[ -z $sizeadd_bytes ]] && sizeadd_bytes=0
# ensure at least 500MB slack
local slack_bytes="$sizeadd_bytes"
if [[ $slack_bytes -lt $min_slack_bytes ]]; then
slack_bytes=$min_slack_bytes
fi
# target size in KiB for ntfsresize
# (bytes -> KiB), and add slack (also bytes -> KiB)
rm /tmp/tmpoutput.txt >/dev/null 2>&1
local sizeadd=$(calculate "${percent}/100*${size}/1024")
sizentfsresize=$(calculate "${size}/1024+${sizeadd}")
sizentfsresize=$(calculate "(${size}+${slack_bytes})/1024")
[[ -z $sizentfsresize || $sizentfsresize -lt 1 ]] && handleError " * (${FUNCNAME[0]})\n Args Passed: $*\n\nFatal Error, Unable to determine NTFS target size with 500MB minimum slack"
echo " * Possible resize partition size (includes >=500MB slack): ${sizentfsresize}k"
echo " * Possible resize partition size: ${sizentfsresize}k"
dots "Running resize test $part"
yes | ntfsresize -fns ${sizentfsresize}k ${part} >/tmp/tmpoutput.txt 2>&1