Move on_ac_power to a shell script.

Fixes #204

Makefile

@@ -4,7 +4,7 @@
 
 include Makefile.inc
 
-SUBDIR=		conf.d etc init.d man sh src
+SUBDIR=		conf.d etc init.d man scripts sh src
 
 # Build our old net foo or not
 _OLDNET_SH=	case "${MKOLDNET}" in \

init.d/fsck.in

@@ -30,38 +30,6 @@ _forcefsck()
 	[ -e /forcefsck ] || get_bootparam forcefsck
 }
 
-_on_ac_power()
-{
-	if [ -f /proc/acpi/ac_adapter/AC*/state ]; then
-		cat /proc/acpi/ac_adapter/AC*/state | while read line; do
-			case "$line" in
-			"state:"*"off-line") return 128;;
-			esac
-		done
-	elif [ -f /proc/pmu/info ]; then
-		cat /proc/pmu/info | while read line; do
-			case "$line" in
-			"AC Power"*": 0") return 128;;
-			esac
-		done
-	elif type envstat >/dev/null 2>&1; then
-		# NetBSD has envstat
-		envstat -d acpiacad0 2>/dev/null | while read line; do
-			case "$line" in
-			"connected:"*"OFF") return 128;;
-			esac
-		done
-	elif sysctl -q hw.acpi.acline >/dev/null 2>/dev/null; then
-		case $(sysctl -n hw.acpi.acline) in
-		0) return 1;;
-		*) return 0;;
-		esac
-	else
-		return 0
-	fi
-	[ $? != 128 ]
-}
-
 start()
 {
 	local fsck_opts= p= check_extra=
@@ -73,7 +41,7 @@ start()
 	if _forcefsck; then
 		fsck_opts="$fsck_opts -f"
 		check_extra="(check forced)"
-	elif ! yesno ${fsck_on_battery:-YES} && ! _on_ac_power; then
+	elif ! yesno ${fsck_on_battery:-YES} && ! on_ac_power; then
 		ewarn "Skipping fsck due to not being on AC power"
 		return 0
 	fi

scripts/Makefile

@@ -0,0 +1,5 @@
+DIR=	${LIBEXECDIR}/bin
+BIN=	on_ac_power
+
+MK=	../mk
+include ${MK}/scripts.mk

scripts/on_ac_power

@@ -0,0 +1,33 @@
+#!/bin/sh
+# Detect AC power or not in a portable way
+# Copyright (c) 2007-2009 Roy Marples <roy@marples.name>
+
+# Exit 0 if on AC power, 1 if not and 255 if we don't know how to work it out
+if [ -f /proc/acpi/ac_adapter/AC*/state ]; then
+	cat /proc/acpi/ac_adapter/AC*/state | while read line; do
+		case "$line" in
+		"state:"*"off-line") return 128;;
+		esac
+	done
+elif [ -f /proc/pmu/info ]; then
+	cat /proc/pmu/info | while read line; do
+		case "$line" in
+		"AC Power"*": 0") return 128;;
+		esac
+	done
+elif type envstat >/dev/null 2>&1; then
+	# NetBSD has envstat
+	envstat -d acpiacad0 2>/dev/null | while read line; do
+		case "$line" in
+		"connected:"*"OFF") return 128;;
+		esac
+	done
+elif sysctl -q hw.acpi.acline >/dev/null 2>/dev/null; then
+	case $(sysctl -n hw.acpi.acline) in
+	0) return 1;;
+	*) return 0;;
+	esac
+else
+	exit 255
+fi
+[ $? != 128 ]