Fix: revise all scripts to conform with shellcheck.

App/DefaultData/.bashrc → App/DefaultData/.ashrc

@@ -1,3 +1,5 @@
+#!/bin/sh
+
 ##### .bashrc for BusyBoxPortable
 # This file will be sourced if BusyBoxPortable is invoked as interactive/login shell.
 #####

App/DefaultData/.color.rc

@@ -1,4 +1,5 @@
 #!/bin/sh
+# shellcheck disable=2034
 
 #  Color Constants
 #  Ref: https://wiki.archlinux.org/index.php/Color_Bash_Prompt
@@ -77,25 +78,17 @@ _COLOR_On_ICyan='\e[0;106m'    # Cyan
 _COLOR_On_IWhite='\e[0;107m'   # White
 
 echo_color_error() {
-	echo -n -e "${_COLOR_BRed}"
-	echo -e "$1"
-	echo -n -e "${_COLOR_Off}"
+	printf "${_COLOR_BRed}%b${_COLOR_Off}\n" "$*"
 }
 
 echo_color_warning() {
-	echo -n -e "${_COLOR_BYellow}"
-	echo -e "$1"
-	echo -n -e "${_COLOR_Off}"
+	printf "${_COLOR_BYellow}%b${_COLOR_Off}\n" "$*"
 }
 
 echo_color_highlight() {
-	echo -n -e "${_COLOR_BGreen}"
-	echo -e "$1"
-	echo -n -e "${_COLOR_Off}"
+	printf "${_COLOR_BGreen}%b${_COLOR_Off}\n" "$*"
 }
 
 echo_color_info() {
-	echo -n -e "${_COLOR_Off}"
-	echo -e "$1"
-	echo -n -e "${_COLOR_Off}"
+	printf "${_COLOR_Off}%b${_COLOR_Off}\n" "$*"
 }

App/DefaultData/.console-title.rc

@@ -1,8 +1,8 @@
 #!/bin/sh
 
 echo_console_title() {
-	echo -en "\e]0;$1\007"
+	printf "\e]0;%b\007" "$*"
 }
 
-_PS_TITLE_BEGIN="\[\e]0;"
-_PS_TITLE_END="\a\]"
+export _PS_TITLE_BEGIN="\[\e]0;"
+export _PS_TITLE_END="\a\]"

App/DefaultData/.profile

@@ -1,13 +1,16 @@
+#!/bin/sh
+# shellcheck disable=1090,2154
+
 ##### .profile for BusyBoxPortable
 # This file will be sourced if BusyBoxPortable is invoked as interactive/login shell.
 # Caution:
 # - Do not modify this file unless absolute necessary.
-# - It is recommended to put your own customization in `.bashrc` instead, which
+# - It is recommended to put your own customization in `.ashrc` instead, which
 #   will be sourced right after this file.
 #####
 
-. "${HOME}/.color.rc"
-. "${HOME}/.console-title.rc"
+[ -f "${HOME}/.color.rc" ] && . "${HOME}/.color.rc"
+[ -f "${HOME}/.console-title.rc" ] && . "${HOME}/.console-title.rc"
 
 # --------------------
 # Config prompt string.
@@ -16,7 +19,7 @@ test "${_CONSOLE_TITLE}" || _CONSOLE_TITLE="BusyBox - \u - \w"
 _PS_ITEM_2ND_LINE="\$(date +%H:%M:%S)"
 
 # Different settings for root or non-root.
-if [[ "${USER}" == "root" ]]; then
+if [ "${USER}" = "root" ]; then
     _PS_ITEM_USER="${_COLOR_BWhite}${_COLOR_On_Red}\u@\h${_COLOR_Off}"
     _PS_ITEM_LAST="${_COLOR_BRed}#${_COLOR_Off}"
 else
@@ -35,4 +38,4 @@ then
 fi
 # ---------- Required by BusyBoxPortable: End
 
-test -f "${HOME}/.bashrc" && . "${HOME}/.bashrc"
+[ -f "${HOME}/.ashrc" ] && . "${HOME}/.ashrc"

App/DefaultData/bin/hello-busybox.sh

@@ -1,6 +1,9 @@
 #!/bin/sh
+# shellcheck disable=1090
 
-[[ -f "${HOME}/.color.rc" ]] && source "${HOME}/.color.rc"
+[ -f "${HOME}/.color.rc" ] && . "${HOME}/.color.rc"
 
-echo -ne "${_COLOR_BGreen}BusyBox ${_COLOR_Cyan}Hello World!!! ${_COLOR_BRed}\n"
-read -p "Press Enter to exit: " answer
+# shellcheck disable=2059,2154
+printf "${_COLOR_BGreen}BusyBox ${_COLOR_Cyan}Hello World!!! ${_COLOR_BRed}\n"
+
+printf "Press [Enter] key to continue..."; read -r