38 lines
993 B
Bash
Executable File
38 lines
993 B
Bash
Executable File
#!/bin/sh
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# Detect AC power or not in a portable way
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# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
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# Exit 0 if on AC power, 1 if not and 255 if we don't know how to work it out
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if [ -f /proc/acpi/ac_adapter/AC*/state ]; then
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cat /proc/acpi/ac_adapter/AC*/state | while read line; do
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case "$line" in
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"state:"*"off-line") exit 128;;
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esac
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done
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elif [ -f /sys/class/power_supply/AC*/online ]; then
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cat /sys/class/power_supply/AC*/online | while read line; do
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[ "${line}" = 0 ] && exit 128
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done
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elif [ -f /proc/pmu/info ]; then
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cat /proc/pmu/info | while read line; do
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case "$line" in
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"AC Power"*": 0") exit 128;;
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esac
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done
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elif type envstat >/dev/null 2>&1; then
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# NetBSD has envstat
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envstat -d acpiacad0 2>/dev/null | while read line; do
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case "$line" in
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"connected:"*"OFF") exit 128;;
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esac
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done
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elif sysctl -q hw.acpi.acline >/dev/null 2>/dev/null; then
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case $(sysctl -n hw.acpi.acline) in
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0) exit 1;;
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*) exit 0;;
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esac
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else
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exit 255
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fi
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[ $? != 128 ]
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