privacy: Add camera and location indicator

[zefr0x]

Add an indicator for camera and location usage. When an application is accessing the camera/webcam or location it will show an indicator.

For the camera , I believe it's pipewire related, if not then monitoring /dev/video* might be a solution if there was no other API.

From #2612:

This can be extended in the future to show Geoclue status (location usage), XWayland screen share status, and camera status :)

Tasks:

• [ ] Add camera indicator.
• [ ] Add location indicator.

[taciturnaxolotl]

I made a config for the webcam!

Home Manager nix config:

"custom/webcam" = {
  return-type = "json";
  interval = 2;
  exec = mkScript {
    deps = [pkgs.jq pkgs.psmisc];
    script = ''
      # get programs using the video0 endpoint
      ps -eo user,pid,cmd -q "$(fuser /dev/video0 2>/dev/null | xargs)" |\
      # omit the column headings and the first line which is wireplumber
      sed -n "1,2!p" |\
      # just get the pid and program columns
      awk '{print $2 " " $3}' |\
      # filter out the program path
      awk -F "/" '{print "{\"tooltip\": \"" $1 " " $NF "\"}"}' |\
      jq -s 'if length > 0 then {text: "󰄀 ", tooltip: (map(.tooltip) | join("\r"))} else {text: "󱦿 ", tooltip: "No applications are using your webcam!"} end' |\
      jq --unbuffered --compact-output
    '';
  };
};

normal waybar config:

"custom/webcam": {
  "exec": 'path/to/script',
  "interval": 2,
  "return-type": "json"
}

You need to have the fuser and jq commands available

# get programs using the video0 endpoint
ps -eo user,pid,cmd -q "$(fuser /dev/video0 2>/dev/null | xargs)" |\
# omit the column headings and the first line which is wireplumber
sed -n "1,2!p" |\
# just get the pid and program columns
awk '{print $2 " " $3}' |\
# filter out the program path
awk -F "/" '{print "{\"tooltip\": \"" $1 " " $NF "\"}"}' |\
jq -s 'if length > 0 then {text: "󰄀 ", tooltip: (map(.tooltip) | join("\r"))} else {text: "󱦿 ", tooltip: "No applications are using your webcam!"} end' |\
jq --unbuffered --compact-output

[cnf]

my version of this:

 fuser /dev/video* 2>/dev/null|xargs -r ps --no-headers -eo pid,comm -q \
| sed 's/\.\(.*\)-wra\?p\?p\?e\?d\?/\1/g' \
| awk '{print "{\"tooltip\": \"" $NF " " "["$1"]" "\"}"}' \
| jq -s 'if length > 0 then {text: "󰖠", tooltip: (map(.tooltip) | join("\r"))} else {text: "󱜷", tooltip: "No spying eyes!"} end' \
| jq --unbuffered --compact-output

Also of note mkScript is parents addition,and can be found here