cleaning

dotfiles-old/bin/volume

@@ -28,14 +28,16 @@ unknown_system(){
 
 usage(){
 	printf "\
-Usage: %b [function] (argument)\n" "$argv0"
+Usage: %b {function} (operand)\n" "$argv0"
 	printf "\
 Functions:
+	'+'      - shortcut to \"relative \$2\"
+	'-'      - shortcut to \"relative -\$2\"
 	absolute - change sound output to absolute unit
-	help     - print this help output
+	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
+	status   - print current sound output in system unit \
 "
 	printf "\
 The options are matched with [char]*. So \"%b help\"
@@ -45,9 +47,10 @@ works the same as \"%b h\".
 	exit 1
 }
 
+# $1 becomes 'help' if previously empty
 [ -n "$1" ] \
 	&& argv1="$1" \
-	|| argv1=s
+	|| argv1=help
 
 case "$argv1" in
 #
@@ -99,7 +102,6 @@ case "$argv1" in
 		&& "$argv0" r -"$2" \
 		|| usage
 	;;
-(h*)	usage ;;
 (m*)
 	[ -z "$2" ] || usage
 	# restore previous volume if there is one
@@ -139,5 +141,6 @@ case "$argv1" in
 	fi
 	"$argv0" a $newval
 	exit $? ;;
-(*)	usage
+(h*)	usage ;;
+(*)	usage ;;
 esac