tvolume - scripts - random scripts
  HTML git clone https://git.parazyd.org/scripts
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       tvolume (901B)
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            1 #!/bin/sh
            2 #
            3 # z3bra - (c) wtfpl 2014
            4 
            5 CHANNEL=$(amixer | sed "1s/^.*'\(.*\)'.*$/\1/p;d")
            6 
            7 usage () {
            8         cat <<EOF
            9 usage: $(basename $0) [-hsla] [-+!]
           10         -h : print help
           11         -s : print on/off
           12         -l : print the current volume percentage (default)
           13         -a : print both level and state
           14         +  : volume +5%
           15         -  : volume -5%
           16         !  : toggle mute
           17 EOF
           18 }
           19 
           20 level() {
           21         amixer get $CHANNEL | sed -n 's/^.*\[\([0-9]\+\)%.*$/\1/p' | uniq
           22 }
           23 
           24 state() {
           25         amixer get $CHANNEL | sed -n 's/^.*\[\(o[nf]\+\)]$/\1/p' | uniq
           26 }
           27 
           28 # print out level and state if no argument is given
           29 test $# -eq 0 && echo "`level`" && exit 0
           30 
           31 case $1 in
           32         -h)       usage ;;
           33         -s)       state ;;
           34         -l)       level ;;
           35         up|+)     amixer set $CHANNEL 5%+ >/dev/null;;
           36         down|-)   amixer set $CHANNEL 5%- >/dev/null;;
           37         toggle|!) amixer set $CHANNEL toggle >/dev/null;;
           38         X)        amixer set Capture toggle >/dev/null;;
           39         *)        amixer set $CHANNEL $1 >/dev/null;;
           40 esac