41 lines
1.9 KiB
Text
41 lines
1.9 KiB
Text
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#!/bin/sh
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# systemd system generator: divert a charger-triggered boot to charging.target.
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#
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# The FP6 ABL appends "androidboot.mode=charger" to the kernel cmdline when
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# the PMIC PON reason is a charger insertion (confirmed on-device 2026-08-24,
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# journal/power). On such boots we swap the default target for the minimal
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# charging.target instead of booting to the full UI.
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#
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# This must NEVER break a normal boot: every failure path falls through to
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# exit 0 and the stock default.target.
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#
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# Escape hatch: /etc/charging-mode/disable — while it exists this generator
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# is inert (deploy.sh creates it; arming = removing it).
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#
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# The CHARGING_MODE_* env overrides exist only for side-effect-free dry-runs
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# on a live system; systemd invokes generators with a clean environment.
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[ -e "${CHARGING_MODE_DISABLE_FILE:-/etc/charging-mode/disable}" ] && exit 0
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grep -Eq '(^| )androidboot\.mode=charger( |$)' /proc/cmdline || exit 0
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# $2 = early generator dir (highest priority in the unit search path that a
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# generator can write to — beats /etc/systemd/system). Old single-arg
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# invocation falls back to $1.
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EARLY_DIR="${2:-$1}"
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[ -n "$EARLY_DIR" ] && [ -d "$EARLY_DIR" ] || exit 0
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ln -sf /etc/systemd/system/charging.target "$EARLY_DIR/default.target" || exit 0
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# Marker for the ConditionPathExists=!/run/charging-mode drop-ins that keep
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# radios/sensors (bluetooth, iio-sensor-proxy, hkdm) out of charging mode.
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# Only created after the default.target diversion succeeded, so the
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# suppressions can never leak into a normal boot.
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: > "${CHARGING_MODE_MARKER:-/run/charging-mode}" 2>/dev/null
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# Power key exits charging mode via reboot: a warm reboot PONs as HARD_RESET,
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# so ABL does not re-append mode=charger and the next boot is a normal boot.
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LOGIND_DIR="${CHARGING_MODE_LOGIND_DIR:-/run/systemd/logind.conf.d}"
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mkdir -p "$LOGIND_DIR" 2>/dev/null && printf '[Login]\nHandlePowerKey=reboot\nHandlePowerKeyLongPress=reboot\n' > "$LOGIND_DIR/10-charging-mode.conf"
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exit 0
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