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Use shell script instead of OS Agent for device wipe #3916

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Mar 6, 2025
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Use shell script instead of OS Agent for device wipe #3916

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6 changes: 2 additions & 4 deletions buildroot-external/rootfs-overlay/usr/lib/systemd/system/haos-wipe.service
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Original file line number Diff line number Diff line change
Expand Up @@ -4,15 +4,13 @@ DefaultDependencies=no
RefuseManualStart=true
RefuseManualStop=true
Wants=mnt-boot.mount
Requires=haos-agent.service
After=haos-agent.service mnt-boot.mount
After=mnt-boot.mount
Before=mnt-data.mount mnt-overlay.mount
ConditionKernelCommandLine=haos.wipe=1

[Service]
Type=oneshot
ExecStart=/usr/bin/busctl --verbose --timeout=1h call io.hass.os /io/hass/os/System io.hass.os.System WipeDevice
ExecStartPost=/usr/bin/sed -i 's/\s*haos.wipe=1//g' /mnt/boot/cmdline.txt
ExecStart=/usr/libexec/haos-wipe

[Install]
WantedBy=sysinit.target
30 changes: 30 additions & 0 deletions buildroot-external/rootfs-overlay/usr/libexec/haos-wipe
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Original file line number Diff line number Diff line change
@@ -0,0 +1,30 @@
#!/bin/sh
set -e

PARTITION_OVERLAY="/dev/disk/by-label/hassos-overlay"
PARTITION_DATA="/dev/disk/by-label/hassos-data"

if [ ! -b "$PARTITION_OVERLAY" ]; then
echo "[ERROR] Overlay partition not found"
exit 1
elif findmnt "$PARTITION_OVERLAY" > /dev/null; then
echo "[ERROR] Unable to wipe overlay partition while it is already mounted"
exit 1
fi

if [ ! -b "$PARTITION_DATA" ]; then
echo "[ERROR] Data partition not found"
exit 1
elif findmnt "$PARTITION_DATA" > /dev/null; then
echo "[ERROR] Unable to wipe data partition while it is already mounted"
exit 1
fi

echo "[INFO] Wiping data partition"
mkfs.ext4 -L "hassos-data" -E lazy_itable_init=0,lazy_journal_init=0 "$PARTITION_DATA"

echo "[INFO] Wiping overlay partition"
mkfs.ext4 -L "hassos-overlay" -I 256 -E lazy_itable_init=0,lazy_journal_init=0 "$PARTITION_OVERLAY"

echo "[INFO] Removing wipe flag from cmdline.txt"
/usr/bin/sed -i 's/\s*haos.wipe=1//g' /mnt/boot/cmdline.txt