└── btmenu


/btmenu:
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 1 | #!/bin/bash
 2 | 
 3 | _bluetoothctl() {
 4 |     LC_ALL=C timeout 30 bluetoothctl
 5 | }
 6 | 
 7 | mode=connect
 8 | 
 9 | # Name -> MAC
10 | declare -A DEVICES
11 | while read -r _ mac name; do
12 |     DEVICES["$name"]=$mac
13 | done < <(echo "devices" | _bluetoothctl | awk '$1 == "Device"')
14 | 
15 | notify() {
16 |     local msg
17 |     local is_error
18 | 
19 |     msg=${1?BUG: no message}
20 |     is_error=${2:-0}
21 | 
22 |     if command -v notify-send >/dev/null 2>&1; then
23 |         notify-send "btmenu" "$msg"  # TODO: escaping
24 |     fi
25 | 
26 |     if (( is_error )); then
27 |         printf 'ERROR: %s\n' "$msg" >&2
28 |     else
29 |         printf '%s\n' "$msg"
30 |     fi
31 | }
32 | 
33 | execute_mode() {
34 |     local mode
35 |     local name
36 |     local mac
37 |     local preposition
38 |     local expected_to_connect
39 |     local retries
40 | 
41 |     mode=${1?BUG: missing mode}
42 |     retries=15
43 | 
44 |     case $mode in
45 |         connect)
46 |             preposition=to
47 |             expected_to_connect=yes
48 |         ;;
49 |         disconnect)
50 |             preposition=from
51 |             expected_to_connect=no
52 |         ;;
53 |     esac
54 | 
55 |     if ! (( ${#DEVICES[@]} )); then
56 |         notify "No devices found. Are they registered with D-Bus?" 1
57 |         return 2
58 |     fi
59 | 
60 |     name=$(printf '%s\n' "${!DEVICES[@]}" | dmenu -p "btmenu" "${dmenu_args[@]}")
61 |     [[ $name ]] || return
62 |     mac=${DEVICES["$name"]}
63 | 
64 |     notify "Attempting to $mode $preposition $name"
65 | 
66 |     while (( retries-- )); do
67 |         printf 'power on\n%s %s\n' "$mode" "$mac" | _bluetoothctl
68 |         if printf 'info %s\n' "$mac" |
69 |             _bluetoothctl |
70 |             grep -Pq '^[\t ]+Connected: '"$expected_to_connect"; then
71 |             notify "${mode^}ed $preposition $name"
72 |             return 0
73 |         fi
74 |         sleep 1
75 |     done
76 | 
77 |     ret="$?"
78 |     notify "Failed to $mode $preposition $name" 1
79 |     return "$ret"
80 | }
81 | 
82 | i=2
83 | 
84 | for arg do
85 |     if [[ $arg == :: ]]; then
86 |         dmenu_args=( "${@:$i}" )
87 |         break
88 |     fi
89 | 
90 |     case "$arg" in
91 |         -d) mode=disconnect ;;
92 |     esac
93 | 
94 |     (( i++ ))
95 | done
96 | 
97 | execute_mode "$mode"
98 | 


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