A Dynamic Collection of Shell Scripts with Educational Purpose

scripts/all_bright

@@ -288,7 +288,8 @@ fi
 
 set -e
 
-bright_file="/tmp/variable_brightness.value"
+TMPDIR="${TMPDIR:-/tmp}"
+bright_file="${TMPDIR}/variable_brightness.value"
 connected=$(xrandr | grep -w connected | awk '{print $1}')
 
 if [ ! -s "$bright_file" ]; then

scripts/bing_wallpaper

@@ -33,14 +33,15 @@ DOCUMENTATION
 
 # Bing Random Wallpaper
 
-#set -x
+TMPDIR="${TMPDIR:-/tmp}"
+
 script="${0##*/}"
 declare -A resolution
 resolution[hd]='1280x720'
 resolution[hd2]='1366x768'
 resolution[fullhd]='1920x1080'
 
-WP_DIR="/tmp/wallpapers"
+WP_DIR="${TMPDIR}/wallpapers"
 WP_FILE="$WP_DIR/bing_wallpaper.jpg"
 
 # Create the wallpapers directory if it does not exist

scripts/bing_wallpaper_simple

@@ -12,11 +12,13 @@ DOCUMENTATION
 
 # Bing Random Wallpaper
 
-WP_DIR="/tmp/wallpapers"
+TMPDIR="${TMPDIR:-/tmp}"
+
+WP_DIR="${TMPDIR}/wallpapers"
 WP_FILE="$WP_DIR/bing_wallpaper.jpg"
 
 # Create the wallpapers directory if it doesn't exist
-mkdir -p $WP_DIR
+mkdir -p "$WP_DIR"
 
 # Generate a random number between 0 and 7
 IDX=$((RANDOM % 8))

scripts/books

@@ -21,71 +21,104 @@ Capabilities:
 - Provides a clean exit option for users.
 DOCUMENTATION
 
-clear -T "$TERM"
+#!/bin/bash
 
-export books_folder="${HOME}/.shell_utils/books"
-cd "${books_folder}" || exit
+clear
 
-# Allowed formats: pdf, txt, epub
-books_list=(*.*)
-cd - >/dev/null || exit
+TMPDIR="${TMPDIR:-/tmp}"
+XDG_DOCUMENTS_DIR=${XDG_DOCUMENTS_DIR:-$(xdg-user-dir DOCUMENTS 2>/dev/null || echo "$HOME/Documents")}
 
-books_list(){
+# Setting the eBook folders
+books_folder="${HOME}/.shell_utils/books"
+xdg_books_folder="${XDG_DOCUMENTS_DIR}/Books"
 
-    number=0
-    echo 'Books available:'
+[[ ! -d "${xdg_books_folder}" ]] && mkdir -p "${xdg_books_folder}"
 
-    for list in "${books_list[@]}";
-        do
-            let number++
-            echo -e "${number})    ${list}\n"
-    done
+# Combining the two folders to get all ebooks
+books_list=("${books_folder}"/*.* "${xdg_books_folder}"/*.*)
 
-    echo -e "\n"'Enter "q" for exit'"\n"
-    echo 'And choose the book you want in the next step'
+# ANSI color for highlighting the selected book
+highlight="\033[44;1;32m"  # Cyan background, bold green text
+nc="\033[0m"  # Reset
 
+# Function to display books list
+books_list_func() {
+    number=0
+    for list in "${books_list[@]}"; do
+        if [[ $number -eq $selected ]]; then
+            # Highlight the selected book
+            echo -e "$highlight$number)    ${list}$nc"
+        else
+            # Display other books normally
+            echo -e "$number)    ${list}"
+        fi
+        ((number++)) || true
+    done
 }
 
+# Interactive book selection
 select_book(){
-
-    read -r book
-    #re='^[0-9]+$'
-
-    #if ! [[ "${book}" =~ $re ]] ; then
-    if [ "${book}" -ge 0 ] > /dev/null 2>&1; then
+    #read -r book
 
+    if [[ "${book}" -ge 0 && "${book}" -lt "${#books_list[@]}" ]]; then
         declare -l ext_test
-        ext_test=$(echo "${books_folder}/${books_list[book]}" | awk -F. '{print $NF}')
-
-        if [ "${ext_test}" = txt ]; then            
-            cat "${books_folder}/${books_list[book]}" | less -i -R
-
-        elif [ "${ext_test}" = epub ]; then            
-            epr "${books_folder}/${books_list[book]}"
-
-        elif [ "${ext_test}" = pdf ]; then
-            rm -f /tmp/temp_book.txt
-            pdftotext -layout -nopgbrk "${books_folder}/${books_list[book]}" /tmp/temp_book.txt
-            cat /tmp/temp_book.txt | less -i -R
-
+
+        # Uses `awk` to split the string by the dot and capture the last part (extension).
+        #ext_test=$(echo "${books_list[book]}" | awk -F. '{print $NF}')
+
+        # Uses Bash parameter expansion to capture everything after the last dot, without external utilities.
+        #ext_test="${books_list[book]##*.}"
+
+        # Ensures the value of the variable is handled correctly with spaces, using quotes to preserve the full filename.
+        ext_test="${books_list[$selected]##*.}"
+
+        if [[ "${ext_test}" == [Tt][Xx][Tt] ]]; then
+            cat "${books_list[$selected]}" | less -i -R
+        elif [[ "${ext_test}" == [Ee][Pp][Uu][Bb] ]]; then
+            epr "${books_list[$selected]}"
+        elif [[ "${ext_test}" == [Pp][Dd][Ff] ]]; then
+            rm -f "${TMPDIR}/temp_book.txt"
+            pdftotext -layout -nopgbrk "${books_list[$selected]}" "${TMPDIR}/temp_book.txt"
+            cat "${TMPDIR}/temp_book.txt" | less -i -R
         else
             echo 'Unrecognized format'
         fi
-
     else
-        echo -e "\nerror: \"${book}\" not is number!"
-
+        echo -e "\nerror: \"${selected}\" is not a valid number!"
     fi
-
 }
 
-if [ "${#books_list[@]}" -gt 0 ]; then
-
-    books_list | less -i -R
-    echo -e "Enter the number corresponding to the book. And then press ENTER.\n"
-    select_book
-
-else
-    echo "books not found"
-
-fi
+# Interactive navigation with w/s for selecting a book
+selected=0
+while true; do
+    clear
+    echo -e "\nUse w/s to navigate, enter to select a book.\n"
+    books_list_func
+    echo -e "\nEnter the number corresponding to the book. And then press ENTER.\n"
+
+    read -r -n 1 -s key
+
+    case $key in
+        w|W)  # W key to move up
+            if [[ $selected -gt 0 ]]; then
+                selected=$((selected - 1))
+            fi
+            ;;
+        s|S)  # S key to move down
+            if [[ $selected -lt $((${#books_list[@]} - 1)) ]]; then
+                selected=$((selected + 1))
+            fi
+            ;;
+        "")  # Enter to select
+            break
+            ;;
+        *)   # Any other key
+            echo -e "\nInvalid key!"
+            ;;
+    esac
+done
+
+# Display the selected book with highlight
+clear
+echo -e "$highlight You selected: ${books_list[$selected]} $nc"
+select_book

scripts/cartoonize.sh

@@ -70,6 +70,8 @@ else
     )
 fi
 
+TMPDIR="${TMPDIR:-/tmp}"
+
 help() {
     cat << EOF
 ${MESSAGES[USAGE]}
@@ -94,15 +96,15 @@ EOF
 # Cartoonization functions
 cartoonize() {
     for i in *.[jJpP][nNpP][gG]; do
-        convert "$i" -colors 64 -paint 4 -compose over -compose multiply \
+        magick "$i" -colors 64 -paint 4 -compose over -compose multiply \
         -modulate 100,150,100 -posterize 24 -blur 0x2 -set filename:base "%[basename]" \
         "%[filename:base]-cartoon.png"
     done
 }
 
 cartoonize2() {
     for i in *.[jJpP][nNpP][gG]; do
-        convert "$i" \( -clone 0 -blur 0x5 \) \( -clone 0 -fill black -colorize 100 \) \
+        magick "$i" \( -clone 0 -blur 0x5 \) \( -clone 0 -fill black -colorize 100 \) \
         \( -clone 0 -define convolve:scale="!" -define morphology:compose=Lighten \
         -morphology Convolve "Sobel:>" -negate -evaluate pow 5 -negate -level 30x100% \) \
         -delete 0 -compose over -composite -set filename:base "%[basename]" \
@@ -112,7 +114,7 @@ cartoonize2() {
 
 cartoonize3() {
     for i in *.[jJpP][nNpP][gG]; do
-        convert "$i" -colors 64 -paint 4 -compose over -compose multiply \
+        magick "$i" -colors 64 -paint 4 -compose over -compose multiply \
         -modulate 100,150,100 -posterize 24 -blur 0x2 -define morphology:compose=Lighten \
         -morphology Convolve "Sobel:>" -negate -evaluate pow 5 -negate -level 30x100% \
         -set filename:base "%[basename]" "%[filename:base]-cartoon.png"
@@ -121,23 +123,23 @@ cartoonize3() {
 
 cartoonize4() {
     for i in *.[jJpP][nNpP][gG]; do
-        convert -quiet "$i" +repage -depth 8 -selective-blur 0x5+10% /tmp/pre-cartoon1.mpc
-        convert /tmp/pre-cartoon1.mpc -level 0x60% -colorspace gray -posterize 6 -depth 8 \
-        -gamma 2.2 /tmp/pre-cartoon2.mpc
-        PreCartoon1=/tmp/pre-cartoon1.mpc
-        PreCartoon2=/tmp/pre-cartoon2.mpc
-        convert "$PreCartoon1" \( "$PreCartoon2" -blur 0x1 \) \( -clone 0 -clone 1 -compose over \
+        magick -quiet "$i" +repage -depth 8 -selective-blur 0x5+10% "${TMPDIR}/pre-cartoon1.mpc"
+        magick "${TMPDIR}/pre-cartoon1.mpc" -level 0x60% -colorspace gray -posterize 6 -depth 8 \
+        -gamma 2.2 "${TMPDIR}/pre-cartoon2.mpc"
+        PreCartoon1=${TMPDIR}/pre-cartoon1.mpc
+        PreCartoon2=${TMPDIR}/pre-cartoon2.mpc
+        magick "$PreCartoon1" \( "$PreCartoon2" -blur 0x1 \) \( -clone 0 -clone 1 -compose over \
         -compose multiply -composite -modulate 100,150,100 \) \( -clone 0 -colorspace gray \) \
         \( -clone 3 -negate -blur 0x2 \) \( -clone 3 -clone 4 -compose over -compose colordodge \
         -composite -evaluate pow 4 -threshold 90% -statistic median 3x3 \) -delete 0,1,3,4 \
         -compose over -compose multiply -composite "${i/.[jJpP][nNpP][gG]/-cartoon.png}"
-        rm /tmp/pre-cartoon1.mpc /tmp/pre-cartoon2.mpc
+        rm "${TMPDIR}/pre-cartoon1.mpc" "${TMPDIR}/pre-cartoon2.mpc"
     done
 }
 
 cartoonize4_other_method() {
     for i in *.[jJpP][pPnN][gG]; do 
-        convert "$i" +repage -depth 8 -selective-blur 0x5+10%% \( -clone 0 -level 0x60%% -colorspace gray \
+        magick "$i" +repage -depth 8 -selective-blur 0x5+10%% \( -clone 0 -level 0x60%% -colorspace gray \
         -posterize 6 -depth 8 -gamma 2.2 -blur 0x1 \) \( -clone 0 -clone 1 -compose multiply -composite \
         -modulate 100,150,100 \) \( -clone 0 -colorspace gray \) \( -clone 3 -negate -blur 0x2 \) \( -clone 3 \
         -clone 4 -compose colordodge -composite -evaluate pow 4 -threshold 90%% -statistic median 3x3 \) -delete 0,1,3,4 \
@@ -150,45 +152,45 @@ cartoonize5() {
     dx="-$convolution,0,$convolution,-$convolution,0,$convolution,-$convolution,0,$convolution"
     dy="$convolution,$convolution,$convolution,0,0,0,-$convolution,-$convolution,-$convolution"
     for i in *.[jJpP][nNpP][gG]; do
-        convert "$i" -quiet -regard-warnings -colorspace RGB +repage /tmp/pre-cartoon1.jpg
-        convert \( /tmp/pre-cartoon1.jpg -median 2 \) \( -size 1x256 gradient: -rotate 90 \
-        -fx "floor(u*10+0.5)/10" \) -clut /tmp/pre-cartoon2.jpg
-        convert \( /tmp/pre-cartoon1.jpg -colorspace gray -median 2 \) \( -clone 0 -bias 50% \
+        magick "$i" -quiet -regard-warnings -colorspace RGB +repage "${TMPDIR}/pre-cartoon1.jpg"
+        magick \( "${TMPDIR}/pre-cartoon1.jpg" -median 2 \) \( -size 1x256 gradient: -rotate 90 \
+        -fx "floor(u*10+0.5)/10" \) -clut "${TMPDIR}/pre-cartoon2.jpg"
+        magick \( "${TMPDIR}/pre-cartoon1.jpg" -colorspace gray -median 2 \) \( -clone 0 -bias 50% \
         -convolve "$dx" -solarize 50% \) \( -clone 0 -bias 50% -convolve "$dy" -solarize 50% \) \
         \( -clone 1 -clone 1 -compose multiply -composite -gamma 2 \) \( -clone 2 -clone 2 \
         -compose multiply -composite -gamma 2 \) -delete 0-2 -compose plus -composite \
-        -threshold 75% /tmp/pre-cartoon3.jpg
-        convert /tmp/pre-cartoon2.jpg /tmp/pre-cartoon3.jpg -compose multiply -composite \
+        -threshold 75% "${TMPDIR}/pre-cartoon3.jpg"
+        magick "${TMPDIR}/pre-cartoon2.jpg" "${TMPDIR}/pre-cartoon3.jpg" -compose multiply -composite \
         "${i/.[jJpP][nNpP][gG]/-cartoon.png}"
-        rm /tmp/pre-cartoon1.jpg /tmp/pre-cartoon2.jpg /tmp/pre-cartoon3.jpg
+        rm "${TMPDIR}/pre-cartoon1.jpg" "${TMPDIR}/pre-cartoon2.jpg" "${TMPDIR}/pre-cartoon3.jpg"
     done
 }
 
 cartoonize6() {
     for i in *.[jJpP][nNpP][gG]; do 
-        convert -quiet "$i" +repage -depth 8 -selective-blur 0x5+10% /tmp/pre-cartoon1.jpg
-        convert /tmp/pre-cartoon1.jpg -level 0x60 -set colorspace RGB -colorspace gray \
-        -posterize 6 -depth 8 -colorspace sRGB /tmp/pre-cartoon2.jpg
-        export PreCartoon1=/tmp/pre-cartoon1.jpg; export PreCartoon2=/tmp/pre-cartoon2.jpg
-        convert "$PreCartoon1" \( "$PreCartoon2" -blur 0x1 \) \( -clone 0 -clone 1 -compose over \
+        magick -quiet "$i" +repage -depth 8 -selective-blur 0x5+10% "${TMPDIR}/pre-cartoon1.jpg"
+        magick "${TMPDIR}/pre-cartoon1.jpg" -level 0x60 -set colorspace RGB -colorspace gray \
+        -posterize 6 -depth 8 -colorspace sRGB "${TMPDIR}/pre-cartoon2.jpg"
+        export PreCartoon1=${TMPDIR}/pre-cartoon1.jpg; export PreCartoon2=${TMPDIR}/pre-cartoon2.jpg
+        magick "$PreCartoon1" \( "$PreCartoon2" -blur 0x1 \) \( -clone 0 -clone 1 -compose over \
         -compose multiply -composite -modulate 100,150,100 \) \( -clone 0 -set colorspace RGB \
         -colorspace gray \) \( -clone 3 -negate -blur 0x4 \) \( -clone 3 -clone 4 -compose over \
         -compose colordodge -composite -evaluate pow 4 -threshold 4 -statistic median 3x3 \) \
         -delete 0,1,3,4 -compose over -compose multiply -composite "${i/.[jJpP][nNpP][gG]/-cartoon.png}"
-        rm /tmp/pre-cartoon1.jpg /tmp/pre-cartoon2.jpg
+        rm "${TMPDIR}/pre-cartoon1.jpg" "${TMPDIR}/pre-cartoon2.jpg"
     done
 }
 
 cartoonize7() {
     for i in *.[jJpP][nNpP][gG]; do
-        convert "$i" -colorspace gray -kuwahara 3 -unsharp 0x2+4+0 \
+        magick "$i" -colorspace gray -kuwahara 3 -unsharp 0x2+4+0 \
         \( xc:blue xc:red xc:yellow +append \) -clut "${i/.[jJpP][nNpP][gG]/-cartoon.png}"
     done
 }
 
 cartoonize8() {
     for i in *.[jJpP][nNpP][gG]; do
-        convert "$i" -kuwahara 3 -unsharp 0x2+4+0 "${i/.[jJpP][nNpP][gG]/-cartoon.png}"
+        magick "$i" -kuwahara 3 -unsharp 0x2+4+0 "${i/.[jJpP][nNpP][gG]/-cartoon.png}"
     done
 }
 

scripts/kernel_check_update.sh

@@ -29,8 +29,10 @@ DOCUMENTATION
 # Define a signal handler to capture SIGINT (Ctrl+C)
 trap 'kill $(jobs -p)' SIGTERM #SIGHUP #SIGINT #SIGQUIT #SIGABRT #SIGKILL #SIGALRM #SIGTERM
 
+TMPDIR="${TMPDIR:-/tmp}"
+
 delay=10
-kernel_booted_temp_file=/tmp/kernel_booted.temp_file
+kernel_booted_temp_file=${TMPDIR}/kernel_booted.temp_file
 
 if [[ ! -f "${kernel_booted_temp_file}" ]]; then
     touch "${kernel_booted_temp_file}"
@@ -60,7 +62,7 @@ has_the_kernel_been_updated() {
         do sleep "$delay"
         installed_kernel="$(LC_ALL=en pacman -Si linux | grep -i "^Version" | awk '{print $3}' | sed 's|-|.|g')"
         kernel_updated="$(LC_ALL=c ls -l /boot/initramfs-linux.img | awk '{print $6 $7 $8}')"
-        lock_file=/tmp/has_the_kernel_been_updated.lock_file
+        lock_file="${TMPDIR}/has_the_kernel_been_updated.lock_file"
         icon=~/.shell_utils/icons/exclamation.png
 
         if [[ "$kernel_initiated" != "$installed_kernel" ]]; then

scripts/quake_terminal.sh

@@ -4,7 +4,9 @@
 # Credits: noctuid
 # Script Name: tdrop
 
-MUTDROP_PATH=/tmp/tdrop_"$USER"_"$DISPLAY"
+TMPDIR="${TMPDIR:-/tmp}"
+
+MUTDROP_PATH="${TMPDIR}/tdrop_${USER}_${DISPLAY}"
 LOG_FILE="$MUTDROP_PATH"/log
 NOAUTOHIDE_FILE="$MUTDROP_PATH"/no_autohide
 GEO_DIR="$MUTDROP_PATH"/geometries

scripts/sign.sh

@@ -19,6 +19,8 @@ Font: https://www.zimuel.it/blog/sign-and-verify-a-file-using-openssl
       https://gist.github.com/ezimuel/3cb601853db6ebc4ee49
 DOCUMENTATION
 
+TMPDIR="${TMPDIR:-/tmp}"
+
 filename=$1
 privatekey=$2
 
@@ -27,6 +29,6 @@ if [[ $# -lt 2 ]] ; then
   exit 1
 fi
 
-openssl dgst -sha256 -sign "$privatekey" -out /tmp/"$filename".sha256 "$filename"
-openssl base64 -in /tmp/"$filename".sha256 -out signature.sha256
-rm /tmp/"$filename".sha256
+openssl dgst -sha256 -sign "$privatekey" -out "${TMPDIR}/${filename}.sha256" "$filename"
+openssl base64 -in "${TMPDIR}/${filename}.sha256" -out signature.sha256
+rm "${TMPDIR}/${filename}.sha256"

scripts/simple_battery_manager.sh

@@ -25,9 +25,11 @@ DOCUMENTATION
 # Define a signal handler to capture SIGINT (Ctrl+C)
 trap 'kill $(jobs -p)' SIGTERM #SIGHUP #SIGINT #SIGQUIT #SIGABRT #SIGKILL #SIGALRM #SIGTERM
 
+TMPDIR="${TMPDIR:-/tmp}"
+
 icon=~/.shell_utils/icons/exclamation.png
 log_file=~/.battery_check_unplugged.log
-lock_file=/tmp/battery_check_unplugged.lock_file
+lock_file="${TMPDIR}/battery_check_unplugged.lock_file"
 shutdown=false
 
 while true