volume script

dotfiles-old/bin/volume

@@ -0,0 +1,58 @@
+#!/bin/sh
+
+argv0="$0"
+
+usage() {
+	printf "\
+Usage: %b {absolute,help,relative,status} [ARGUMENT...]\n" "$argv0"
+	printf "\
+Examples:
+	%b absolute 0  # mute sound output
+	%b help        # print this help text
+	%b relative 4  # increase the volume by 4 units
+	%b relative -4 # decrease the volume by 4 units
+	%b status      # print current volume
+" "$argv0" "$argv0" "$argv0" "$argv0" "$argv0"
+	printf "\
+The options are matched with [char]*. So \"%b help\"
+works the same as \"%b h\".
+
+" "$argv0" "$argv0"
+	exit 1
+}
+
+[ -n "$1" ] || usage
+
+case "$1" in
+(a*)
+	case "$(uname)" in
+	(NetBSD)
+		audioctl -w play.gain=$1 >/dev/null
+		;;
+	(*) unknown_system
+	esac
+	;;
+(h*) usage ;;
+(r*)
+	case "$(uname)" in
+	(NetBSD)
+		# works. 9.2 STABLE 2021-07
+		audioctl -w play.gain=$(( \
+			$( \
+				audioctl -a \
+				| grep "play\.gain" \
+				| cut -d '=' -f 2 \
+			) + $2)) >/dev/null
+		;;
+	(*) unknown_system
+	esac
+	;;
+(s*)
+	case "$(uname)" in
+	(NetBSD)
+		audioctl -a | grep "play\.gain" | cut -d '=' -f 2
+		;;
+	(*) unknown_system
+	esac
+	;;
+esac

dotfiles-old/manifest_file

@@ -15,4 +15,5 @@
 .config/i3status/config
 bin/data
 bin/displaym
+bin/volume
 src/dmenu/config.h