rundesktop

#!/usr/bin/bash

unset RUN_X
RED='\033[1;91m'
BLUE='\033[1;94m'
GREEN='\033[1;92m'
YELLOW='\033[1;33m'
RESETCOLOR='\033[1;00m'
DESKTOP_DISPLAY=1337
export DESKTOP_KEY="$BASHPID"
export SYS_DISPLAY="$DISPLAY"

[ ! -n "$(tty|grep -v 'not a'|grep -Eo 'tty|pts')" ] && \
    NOT_TERM=1

nocolor() { sed -r 's|\x1B\[([0-9]{1,3}(;[0-9]{1,2};?)?)?[mGK]||g' ; }

error_msg() {
    echo -e "${RED}[ ERROR ][$(date +"%Y.%m.%d %T")]: $@ $RESETCOLOR"
    if [ "$NOT_TERM" == 1 ]
        then notify-send -a 'RunImage Error' "$(echo -e "$@"|nocolor)" 2>/dev/null &
    fi
}

info_msg() {
    if [ "$QUIET_MODE" != 1 ]
        then echo -e "${GREEN}[ INFO ][$(date +"%Y.%m.%d %T")]: $@ $RESETCOLOR"
            if [[ "$NOT_TERM" == 1 && "$DONT_NOTIFY" != 1 ]]
                then notify-send -a 'RunImage Info' "$(echo -e "$@"|nocolor)" 2>/dev/null &
            fi
    fi
}

warn_msg() {
    if [[ "$QUIET_MODE" != 1 && "$NO_WARN" != 1 ]]
        then echo -e "${YELLOW}[ WARNING ][$(date +"%Y.%m.%d %T")]: $@ $RESETCOLOR"
            if [[ "$NOT_TERM" == 1 && "$DONT_NOTIFY" != 1 ]]
                then notify-send -a 'RunImage Warning' "$(echo -e "$@"|nocolor)" 2>/dev/null &
            fi
    fi
}

is_exe_exist() { command -v "$@" &>/dev/null ; }

is_not_ro() {
    if [ ! -w "$RUNROOTFS" ]
        then
            error_msg "Unable to install dependencies. Read-only!"
            exit 1
    fi
}

[[ "$INSIDE_RUNIMAGE" == 1 && ! -d "$RUNROOTFS" ]] && \
     RUNROOTFS='/'

if is_exe_exist pacman
    then
        if [ "$(pacman -Qq xorg-server tk tcl xclip xfce4-session pavucontrol pulseaudio qt5ct 2>/dev/null|wc -l)" != "8" ] && is_not_ro
            then
                info_msg "Installing the necessary dependencies..."
                pac -Syu --noconfirm && \
                pac -S xorg tk tcl xclip xfce4 xfce4-goodies pavucontrol pulseaudio qt5ct --noconfirm||\
                exit 1
        fi
elif is_exe_exist apt
    then
        if [ "$(dpkg --get-selections|awk '{print$1}'|\
                grep -Ew '^xserver-xorg$|^xserver-xephyr$|^tk$|^tcl$|^xclip$|^xfce4-session$|^pavucontrol$|^pulseaudio$|^qt5ct$'|\
                wc -l)" != "9" ] && is_not_ro
            then
                info_msg "Installing the necessary dependencies..."
                sudo apt update && \
                sudo apt upgrade -y && \
                sudo apt install task-xfce-desktop xorg tk tcl xclip xfce4 \
                    xfce4-goodies pavucontrol pulseaudio xserver-xephyr qt5ct -y||\
                exit 1
        fi
else
    error_msg "The package manager cannot be detected!"
    exit 1
fi

# PID randomizer (UNSHARE_PIDS ICEauthority bug)
[ "$UNSHARE_PIDS" == 1 ] && \
    for _ in $(seq 0 $(echo $RANDOM|head -c 2)) ; do /usr/bin/true ; done

while true
    do
        [ ! -f "/tmp/.X$DESKTOP_DISPLAY-lock" ] && \
            break
        DESKTOP_DISPLAY="$(( $DESKTOP_DISPLAY + 1 ))"
done

if [[ "$RUNTTY" =~ "tty" ]]
    then
        export DISPLAY=:$DESKTOP_DISPLAY
        info_msg "Xorg DISPLAY=$DISPLAY"
        unset XEPHYR XEPHYR_FULLSCREEN \
              XEPHYR_SIZE XEPHYR_DISPLAY
        if [ -x "/usr/lib/Xorg.wrap" ]
            then XORG="/usr/lib/Xorg.wrap"
        elif [ -x "/usr/bin/Xorg" ]
            then XORG="/usr/bin/Xorg"
        elif [ -x "/usr/bin/X" ]
            then XORG="/usr/bin/X"
        else XORG="/bin/Xorg"
        fi
        $XORG -nolisten tcp vt$XDG_VTNR $DISPLAY &
        XORG_PID="$!"
        sleep 0.01
        [ -d "/proc/$XORG_PID" ] && \
            RUN_X=1 || \
            error_msg "Failed to start Xorg!"
    else
        [ -n "$DISPLAY" ] && \
            XEPHYR=1
fi

if [[ "$XEPHYR" == 1 || "$XEPHYR_FULLSCREEN" == 1 ]] || \
    [[ -n "$XEPHYR_SIZE" || -n "$XEPHYR_DISPLAY" ]]
    then
        [ ! -n "$XEPHYR_DISPLAY" ] && \
            XEPHYR_DISPLAY=:$DESKTOP_DISPLAY
        info_msg "Xephyr DISPLAY=$XEPHYR_DISPLAY"
        if [ "$XEPHYR_FULLSCREEN" == 1 ]
            then
                info_msg "Xephyr in full-screen mode"
        elif [ ! -n "$XEPHYR_SIZE" ]
            then
                XEPHYR_SIZE="1600x900"
                info_msg "Xephyr screen resolution: 1600x900"
        elif [ -n "$XEPHYR_SIZE" ]
            then
                XEPHYR_SIZE="$XEPHYR_SIZE"
                info_msg "Xephyr screen resolution: $XEPHYR_SIZE"
        fi
        Xephyr $([ "$XEPHYR_FULLSCREEN" == 1 ] && echo "-fullscreen"||echo "-screen $XEPHYR_SIZE") \
            -resizeable +extension GLX -br -title "RunImage Desktop [$XEPHYR_DISPLAY]" \
            -once -ac -name 'RunImage' $XEPHYR_DISPLAY &>/dev/null &
        XEPHYR_PID="$!"
        sleep 0.01
        if [ -d "/proc/$XEPHYR_PID" ]
            then
                export DISPLAY=$XEPHYR_DISPLAY
                RUN_X=1
            else
                error_msg "Failed to start Xephyr!"
        fi
fi

if [ "$RUN_X" == 1 ]
    then
        info_msg "Launching RunImage Desktop..."
        xfwm4 &
        XFWM_PID="$!"
        if [[ -n "$SYS_DISPLAY" && "$UNSHARE_CLIPBOARD" != 1 ]]
            then
                xclipsync &
                XCLIPSYNC_PID="$!"
            else
                warn_msg "Clipboard synchronization is disabled!"
        fi
        dbus-run-session bash /etc/xdg/xfce4/xinitrc
        EXEC_STATUS="$?"
        kill $XEPHYR_PID $XORG_PID $XFWM_PID $XCLIPSYNC_PID 2>/dev/null
        kill $(pgrep -fa xclipfrom|grep "$DESKTOP_KEY"|awk '{print$1}') 2>/dev/null
        rm -rf "/tmp/.X$DESKTOP_DISPLAY-lock" 2>/dev/null
fi
exit $EXEC_STATUS