independ battery and volume

volume/volume

@@ -0,0 +1,113 @@
+#!/bin/sh
+set -e
+
+argv0="$0"
+
+# ADDING A NEW SOUND SERVER/CLIENT/WHATEVERIDK
+# `volume a $2` must set the volume to $2, an integer value. This should be a
+# percentage, 100% being the loudest possible volume that can be output by
+# hardware without quality loss. Percentages above 100% will be allowable in
+# software if using percentage units. If percentage units are implausible to
+# implement, system units are okay (e.g. 0-$arbitrary scale versus 0-100).
+
+# `volume s` must output the current volume in integer form in whatever units
+# are being used by `volume a` on the given system.
+
+VOLUME_TMP_FILE="$HOME/.volume-previous"
+
+if [ "$(uname)" = NetBSD ]; then
+	VOLUME_SYSTEM=netbsd
+elif command -v pactl >/dev/null 2>&1; then
+	VOLUME_SYSTEM=pulseaudio
+else
+	printf "%s: Unknown system.\n" "$0"
+	exit 1
+fi
+
+usage(){
+	printf "\
+Usage: %b {function} (operand)\n" "$0"
+	printf "\
+Functions:
+	'+'      - shortcut to \"relative \$2\"
+	'-'      - shortcut to \"relative -\$2\"
+	absolute - change sound output to absolute unit
+	debug    - show debugging information
+	help,''  - print this help output
+	mute     - toggle mute/unmute
+	relative - change sound output relative to current status
+	status   - print current sound output in system unit \
+"
+	printf "\
+The options are matched with [char]*. So \"%b help\"
+works the same as \"%b h\".
+
+" "$argv0" "$argv0"
+	exit 1
+}
+
+case "$1" in
+
++) "$0" r  "$2" ;;
+-) "$0" r -"$2" ;;
+
+a*)
+	nonzero $2 && ! nonzero $3 && str isdigit "$2" \
+		|| usage
+	"$0".$VOLUME_SYSTEM "$@"
+	;;
+s*)
+	! nonzero $2 \
+		|| usage
+	"$0".$VOLUME_SYSTEM s
+	;;
+
+d*)
+	printf '$0: %s\nAudio system detected: %s\n' \
+		"$0" \
+		$VOLUME_SYSTEM
+	;;
+
+m*) [ -z "$2" ] || usage
+	# restore previous volume if there is one
+	if [ -e "$VOLUME_TMP_FILE" ]; then
+		xargs "$0" a <"$VOLUME_TMP_FILE" \
+			&& rm "$VOLUME_TMP_FILE" \
+			&& printf "Unmuted.\n" \
+			&& exit 0 \
+			|| printf "Error restoring previous volume.\n" \
+				1>&2 \
+			&& exit 1
+	fi
+
+	# otherwise, make new file with previous volume
+
+	# dd used rather than shell redirect so it's easy to determine
+	# whether or not the file write worked
+	if ! printf "%b" "$("$0" s)" \
+				| dd of="$VOLUME_TMP_FILE" 2>/dev/null
+	then
+		printf "Error writing to file.\n" 1>&2
+		exit 1
+	fi
+
+	# and then of course mute
+	"$0" a 0
+	printf "Muted.\n"
+
+	exit 0 ;;
+
+r*)
+	nonzero $2 && ! nonzero $3 \
+			&& str isdigit "$(printf "%s\n" "$2" | sed 's/^\-//')" \
+		|| usage
+
+	"$0" a \
+		"$(printf "%s %s + p\n" \
+				$("$0" s) \
+				"$(printf "%s\n" $2 | tr - _)" \
+			| dc)"
+	exit $? ;;
+
+*)	usage ;;
+esac

volume/volume.netbsd

@@ -0,0 +1,18 @@
+#!/bin/sh -e
+
+# NetBSD 9.2 STABLE 2021-07
+
+case "$1" in
+a*)
+	audioctl -w play.gain=$2 >/dev/null
+	exit $?
+	;;
+
+s*)	# hacky
+	audioctl -a \
+		| grep "play\.gain" \
+		| cut -d '=' -f 2
+	exit $?
+	;;
+esac
+exit 1

volume/volume.pulseaudio

@@ -0,0 +1,20 @@
+#!/bin/sh -e
+
+# pactl 15.0 compiled+linked with libpulse 15.0.0
+
+case "$argv1" in
+a*)
+	pactl set-sink-volume @DEFAULT_SINK@ $2%
+	exit $?
+	;;
+
+s*)	# really hacky, gets the job done
+	# gets the volume % of Lchan specifically
+	pactl get-sink-volume @DEFAULT_SINK@ \
+		| sed q \
+		| cut -d '/' -f 2 \
+		| xargs echo \
+		| sed s/'%'//
+	;;
+esac
+exit 1