initial commit

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diff --git a/src/usr/bin/keyboard-leds-trayicons.sh b/src/usr/bin/keyboard-leds-trayicons.sh
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+#!/usr/bin/env sh
+# File: keyboard-leds-trayicons.sh
+# License: CC-BY-SA 4.0
+# Author: bgstack15
+# Startdate: 2020-02-13 15:30
+# Title: Substitute for Keyboard LED Indicators
+# Purpose: For systems that do not show LEDs for capslock and numlock
+# History:
+# Usage:
+# Reference:
+#    some Internet place that demonstrated how to use xset q
+#    some Internet place that showed how to convert the decimal to binary with awk
+#    get_conf comes from framework.sh
+# Improve:
+#    provide way to change status of capslock by clicking the icon?
+# Dependencies:
+#    binaries: mktrayicon, awk, xset
+
+# little c: https://visualpharm.com/free-icons/c%20letter-595b40b65ba036ed117d1027
+# license for icons: Use for free, but link to [icons8](https://icons8.com/license)
+
+# CONFIG FILES
+test -z "${KLT_GLOBAL_CONF}" && KLT_GLOBAL_CONF=/etc/keyboard-leds-trayicons.conf
+test -z "${KLT_USER_CONF}" && KLT_USER_CONF="${HOME}/.config/keyboard-leds-trayicons.conf"
+# also accept KLT_CONF
+
+# FUNCTIONS
+
+get_conf() {
+   # Ripped from framework.sh
+   # call: get_conf "${conffile}"
+   local _infile="$1"
+   local _tmpfile1="$( mktemp )"
+   sed -e 's/^\s*//;s/\s*$//;/^[#$]/d;s/\s*[^\]#.*$//;' "${_infile}" | grep -viE "^$" | while read _line ;
+   do
+      local _left="$( echo "${_line}" | cut -d'=' -f1 )"
+      eval "_thisval=\"\${${_left}}\""
+      test -z "${_thisval}" && echo "${_line}" >> "${_tmpfile1}"
+   done
+   test -f "${_tmpfile1}" && { . "${_tmpfile1}" 1>/dev/null 2>&1 ; }
+   /bin/rm -rf "${_tmpfile1}" 1>/dev/null 2>&1
+}
+
+clean_keyboard_leds_trayicons() {
+   { test -e "${capslockicon}" && echo "q" > "${capslockicon}" ; } 1>/dev/null 2>&1 &
+   { test -e "${numlockicon}" && echo "q" > "${numlockicon}" ; } 1>/dev/null 2>&1 &
+   sleep 1 && rm -f "${capslockicon}" "${numlockicon}" "${KLT_KILLFILE}"
+}
+
+get_led_mask() {
+   xset q | awk 'function d2b(d,b) {while(d) {b=d%2b;d=int(d/2)}return(b)} /LED/{print d2b($NF)}'
+}
+
+mask_position_on() {
+   # call: mask_position_on "${LEDS}" "${ledposition}"
+   ___result="$( printf "%08d" "${1}" | tail -c "${2}" | head -c 1 )"
+   ___result=$(( 1 - ___result ))
+   return "${___result}"
+}
+
+is_capslock_on() {
+   # call: get_led_mask | is_capslock_on && echo "yes"
+   read ___ico
+   mask_position_on "${___ico}" "1"
+}
+
+is_numlock_on() {
+   # call: get_led_mask | is_numlock_on && echo "yes"
+   read ___ico
+   mask_position_on "${___ico}" "2"
+}
+
+# LOAD CONFIGS
+# order is important! The last one called gets precedence.
+# instead of simply dot-sourcing the conf file, pass it to get_conf which only applies new values, so this process's environment is preserved
+for thisconf in "${KLT_GLOBAL_CONF}" "${KLT_USER_CONF}" "${KLT_CONF}" ;
+do
+   test -r "${thisconf}" && get_conf "${thisconf}"
+done
+
+# DEFAULTS in case configs did not have these values
+test -z "${KLT_CAPS_ON_ICON}" && KLT_CAPS_ON_ICON=capslock-on
+test -z "${KLT_CAPS_OFF_ICON}" && KLT_CAPS_OFF_ICON=capslock-off
+test -z "${KLT_CAPS_ON_ICON}" && KLT_CAPS_ON_ICON=numlock-on
+test -z "${KLT_CAPS_OFF_ICON}" && KLT_CAPS_OFF_ICON=numlock-off
+test -z "${KLT_KILLFILE}" && KLT_KILLFILE="/tmp/kill-all-leds-trayicons"
+
+# INITIALIZATION
+
+capslockicon="/var/run/user/$( id -u )/${$}.cap.icon"
+numlockicon="/var/run/user/$( id -u )/${$}.num.icon"
+
+test "ON" = "ON" && {
+   mkfifo "${capslockicon}"
+   mkfifo "${numlockicon}"
+
+   mktrayicon "${capslockicon}" &
+   mktrayicon "${numlockicon}" &
+
+   echo "m quit,echo 'q' > ${capslockicon} ; touch "${KLT_KILLFILE}"" > "${capslockicon}"
+   echo "m quit,echo 'q' > ${numlockicon} ; touch "${KLT_KILLFILE}"" > "${numlockicon}"
+}
+
+caps_status_old=-1
+num_status_old=-1
+
+rm -f "${KLT_KILLFILE}"
+
+trap 'trap "" 2 ; touch "${KLT_KILLFILE}" '  2 # CTRL-C
+
+while ! test -e "${KLT_KILLFILE}" 2>/dev/null ;
+do
+   x="$( get_led_mask )"
+   caps_status_now=0
+   num_status_now=0
+   echo "${x}" | is_capslock_on && caps_status_now=1
+   echo "${x}" | is_numlock_on && num_status_now=1
+
+   if test "${caps_status_now}" != "${caps_status_old}" ;
+   then
+      test -p "${capslockicon}" && case "${caps_status_now}" in
+         1)
+            test -n "${KLT_DEBUG}" && echo "capslock on (icon file ${KLT_CAPS_ON_ICON})" 1>&2
+            echo "i ${KLT_CAPS_ON_ICON}" > "${capslockicon}"
+            echo "t capslock on" > "${capslockicon}"
+            ;;
+         0)
+            test -n "${KLT_DEBUG}" && echo "capslock off (icon file ${KLT_CAPS_OFF_ICON})" 1>&2
+            echo "i ${KLT_CAPS_OFF_ICON}" > "${capslockicon}" 
+            echo "t capslock off" > "${capslockicon}"
+            ;;
+      esac
+   fi
+
+   if test "${num_status_now}" != "${num_status_old}" ;
+   then
+      test -p "${numlockicon}" && case "${num_status_now}" in
+         1)
+            test -n "${KLT_DEBUG}" && echo "numlock on (icon file ${KLT_NUM_ON_ICON})" 1>&2
+            echo "i ${KLT_NUM_ON_ICON}" > "${numlockicon}"
+            echo "t numlock on" > "${numlockicon}"
+            ;;
+         0) 
+            test -n "${KLT_DEBUG}" && echo "numlock off (icon file ${KLT_NUM_OFF_ICON})" 1>&2
+            echo "i ${KLT_NUM_OFF_ICON}" > "${numlockicon}"
+            echo "t numlock off" > "${numlockicon}"
+            ;;
+      esac
+   fi
+      
+   caps_status_old="${caps_status_now}"
+   num_status_old="${num_status_now}"
+   sleep 0.75
+done
+
+# safety shutoff
+clean_keyboard_leds_trayicons