Remove sudo from keyboard commands (#159)

* Update README, remove sudo from keymap.tcl and virtual-programs

* Add forloop for usermods, avoids errors when certain groups don't exist

* Remove extranous usermod instruction

* Fix esc-restart, remove sudo from keymap

Instead of using `loadkeys` we're now using `kbd_mode -u` to load the
keymap. This is because `loadkeys` requires root permissions and we're
trying to remove the need for `sudo` in the system. I tried removing
`sudo` from the `esc-restart` virtual program but it failed with an
interactive authentication error. I'm not sure how to do this with less
powerful permissions than `sudo` so I'm leaving it as is for now.

* Add kdb to explicit dependnecies to get around need for loadkeys

This is precautionary, in practice kbd is a dependency of console-data
but I could image cases in the future where we swap console-data but
still need kdb.

README.md

@@ -61,11 +61,7 @@ if flashing from a Mac])
    If no `folk` user, then:
 
         sudo useradd -m folk; sudo passwd folk;
-        sudo usermod -a -G adm,dialout,cdrom,sudo,audio,video,plugdev,games,users,input,render,netdev,lpadmin,gpio,i2c,spi folk
-
-   (If you get errors from usermod like `group 'gpio' does not exist`,
-   try running again omitting the groups that don't exist from the
-   command.)
+        for group in adm dialout cdrom sudo audio video plugdev games users input tty render netdev lpadmin gpio i2c spi; do sudo usermod -a -G $group folk; done; groups folk
 
 1. `sudo apt update`
 
@@ -79,7 +75,7 @@ if flashing from a Mac])
 1. Install dependencies: `sudo apt install rsync tcl-thread tcl8.6-dev
    git libjpeg-dev libpng-dev fbset libdrm-dev pkg-config v4l-utils
    mesa-vulkan-drivers vulkan-tools libvulkan-dev libvulkan1 meson
-   libgbm-dev glslc vulkan-validationlayers console-data`
+   libgbm-dev glslc vulkan-validationlayers console-data kbd`
 
    (When prompted while installing `console-data` for `Policy for handling keymaps` type `3` (meaning `3. Keep kernel keymap`) and press `Enter`)
 

lib/keymap.tcl

@@ -157,9 +157,9 @@ namespace eval keymap {
         }
 
         proc load {name} {
-            exec sudo loadkeys $name
-            set keytable [exec sudo dumpkeys -kf]
-            set unitable [exec sudo dumpkeys -kfn]
+            exec kbd_mode -u $name
+            set keytable [exec dumpkeys -kf]
+            set unitable [exec dumpkeys -kfn]
 
             set ksyms [dict create]
             set mods [_fillRange 0-15]

virtual-programs/esc-restart.folk

@@ -1,3 +1,8 @@
 When keyboard /k/ claims key Meta_Escape is down with timestamp /any/ {
+	# When sudo is removed here you get:
+	# 
+	# Error in virtual-programs/esc-restart.folk, match m10029:6: Failed to restart folk.service: Interactive authentication required.
+	# 
+	# TODO: Figure out how to do this with less powerful permissions than `sudo`.
 	exec sudo systemctl restart folk
 }

virtual-programs/keyboard.folk

@@ -25,7 +25,7 @@ proc walkInputEventPaths {} {
             if {[file readable $device] == 0} {
                 puts "Device $device is not readable. Attempting to change permissions."
                 # Attempt to change permissions so that the file can be read
-                exec sudo chmod +r $device
+                exec chmod +r $device
             }
             lappend keyboards $device
         }