Re-Wrote gvol

It now parses amixer output with a single highly efficient sed command. Also,
removed all bashisms.

diff --git a/.local/bin/gvol b/.local/bin/gvol
index 29f43ba..edbf5ba 100755 (executable)
--- a/.local/bin/gvol
+++ b/.local/bin/gvol
@@ -2,10 +2,7 @@
 # gvol - get volume of alsa control using amixer, with $1 as the control name,
 # defaulting to Master if blank
 
-[ -z "$1" ] && CONTROL=Master || CONTROL="$1"
-
-VOL=$(amixer get $CONTROL | grep -m1 "%")
-
-[ $(grep -Fo "[on]" <<< "$VOL") ] \
-       && grep -o "[0-9]*%" <<< "$VOL" \
-       || echo MUTE
+amixer get \
+       $( [ -z "$1" ] && echo "Master" || echo "$1") \
+       | sed   -e '/\[on\]/    { s/\].*//; s/.*\[//;   p; q }' \
+                       -e '/\[off\]/   { s/^.*$/MUTE/;                 p; q }' -n