Add pactl support

dotfiles-old/bin/volume

@@ -1,18 +1,32 @@
 #!/bin/sh
 
-# Has some undocumented features but they're functional (as far as I know)
-# and system-independent. just shortcuts for me really.
-
 argv0="$0"
 
-! which stris >/dev/null 2>/dev/null \
-	&& printf "%b: Missing stris.\n" \
+# ADDING A NEW SOUND SERVER/CLIENT/WHATEVERIDK
+# `volume a` and `volume s` are the system dependent functions.
+
+# `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.
+
+! command -v stris >/dev/null 2>/dev/null \
+	&& printf "%b: Missing stris.\n" "$argv0" \
 	&& exit 1 \
 	|| true
 
 VOLUME_TMP_FILE="$HOME/.volume-previous"
 
-usage() {
+unknown_system(){
+	printf "%s: Unknown system.\n" "$argv0" 1>&2
+	exit 1
+}
+
+usage(){
 	printf "\
 Usage: %b [function] (argument)\n" "$argv0"
 	printf "\
@@ -36,28 +50,57 @@ works the same as \"%b h\".
 	|| argv1=s
 
 case "$argv1" in
-(+) # shortcut
+#
+# SYSTEM DEPENDENT
+#
+(a*)
+	[ -n "$2" ] && [ -z "$3" ] && stris int "$2" || usage 
+
+	if [ "$(uname)" = "NetBSD" ]; then
+		# NetBSD 9.2 STABLE 2021-07
+		audioctl -w play.gain=$2 >/dev/null
+
+	elif command -v pactl >/dev/null; then
+		# pactl 15.0 compiled+linked with libpulse 15.0.0
+		pactl set-sink-volume @DEFAULT_SINK@ $2%
+
+	else	unknown_system; fi
+	exit 0 ;;
+(s*)
+	[ -z "$2" ] || usage
+
+	if [ "$(uname)" = "NetBSD" ]; then
+		# hacky
+		audioctl -a \
+			| grep "play\.gain" \
+			| cut -d '=' -f 2
+
+	elif command -v pactl >/dev/null; then
+		# 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/'%'//
+
+	else	unknown_system; fi
+	exit 0 ;;
+#
+# SYSTEM independent
+#
+(+)
 	[ -n "$2" ] && [ -z "$3" ] && stris uint "$2" \
 		&& "$argv0" r "$2" \
 		|| usage
 	;;
-(-) # shortcut
+(-)
 	[ -n "$2" ] && [ -z "$3" ] && stris uint "$2" \
 		&& "$argv0" r -"$2" \
 		|| usage
 	;;
-(a*)
-	[ -n "$2" ] && [ -z "$3" ] && stris int "$2" || usage 
-	case "$(uname)" in
-	(NetBSD)
-		# 9.2 STABLE 2021-07
-		audioctl -w play.gain=$2 >/dev/null
-		;;
-	(*)	unknown_system
-	esac
-	exit 0 ;;
 (h*)	usage ;;
-(m*)	# system independent
+(m*)
 	[ -z "$2" ] || usage
 	# restore previous volume if there is one
 	if [ -e "$VOLUME_TMP_FILE" ]; then
@@ -74,9 +117,9 @@ case "$argv1" in
 
 	# dd used rather than shell redirect so it's easy to determine
 	# whether or not the file write worked
-	if ! printf "%b" "$("$argv0" s)" | dd of="$VOLUME_TMP_FILE" \
-			2>/dev/null
-		then
+	if ! printf "%b" "$("$argv0" s)" \
+				| dd >"$VOLUME_TMP_FILE" 2>/dev/null
+	then
 		printf "Error writing to file.\n" >/dev/stderr
 		false
 	fi
@@ -86,22 +129,15 @@ case "$argv1" in
 	printf "Muted.\n"
 
 	exit 0 ;;
-(r*)	# system independent
-	[ -n "$2" ] && [ -z "$3" ] && stris int "$2" || usage
+(r*)
+	[ -n "$2" ] && [ -z "$3" ] && stris int "$2" \
+		|| usage
+
 	if ! newval=$(add $("$argv0" s) $2) || ! stris int "$newval"; then
-		printf "%b: Error finding new value for volume.\n"
+		printf "%b: Error finding new value for volume.\n" "$argv0"
 		exit 1
 	fi
 	"$argv0" a $newval
 	exit $? ;;
-(s*)
-	[ -z "$2" ] || usage
-	case "$(uname)" in
-	(NetBSD)
-		audioctl -a | grep "play\.gain" | cut -d '=' -f 2
-		;;
-	(*)	unknown_system
-	esac
-	exit 0 ;;
 (*)	usage
 esac