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#!/bin/bash

# File:		/sbin/yast2
# Module:	yast2
# Summary:	Main YaST2 start script
# Authors:	Mathias Kettner <kettner@suse.de>
#		Klaus Kaempf <kkaempf@suse.de>
#		Ludwig Nussel <lnussel@suse.de>
#		Arvin Schnell <aschnell@suse.de>
#
# This script is called when the user just types 'yast2'. It starts
# the qt user interface in case the DISPLAY variable is set and other-
# wise ncurses. It starts then the module 'menu' which implements
# the configuration and administration menu.

export PATH=/sbin:/usr/sbin:$PATH

# allow for a different prefix
# strip the basename off $0, which can be: (bnc#382216, bnc#458385)
# /sbin/yast2, /sbin/yast, yast2 (sh -x yast2 ...), /sbin//yast2 (PATH=/sbin/:...)
shopt -s extglob
mydir=${0%%*(/)[YyZz]a[Ss][Tt]?(2)}
if [[ -z "$mydir" || "$mydir" = /sbin ]]; then
    YAST_PREFIX=/usr
else
    YAST_PREFIX=${mydir%/sbin}
fi

# load common script functions
. $YAST_PREFIX/lib/YaST2/bin/yast2-funcs


# check that system directories are non-empty - bnc #450643
mount_ok=1;
test -z `ls /proc |head -n1` && echo "The /proc filesystem is not mounted." && mount_ok=0;
test -z `ls /sys |head -n1` && echo "The /sys filesystem is not mounted." && mount_ok=0;
test -z `ls /dev |head -n1` && echo "The /dev filesystem is not mounted." && mount_ok=0;
if test $mount_ok -eq 0 ; then
    echo "If you are running in a chroot environment, bind-mount missing filesystems.";
    exit 1;
fi

# #211392, #265263
# if we are in X and do not have _input_ from terminal,
# save the output and display it via xmessage in case of error.
# TODO: also use bug-buddy or the kde thing... (#265263#c48)
redirect()
{
    if [ -n "$DISPLAY" -a ! -t 0 ]; then
	ERRLOG=`mktemp -t yast2-err-XXXXXX`
	trap exit_trap EXIT
	exec &> $ERRLOG
    fi
}

# $1: file with error message
display_error_file()
{
    if [ -x /usr/bin/zenity ]; then
	/usr/bin/zenity  --title="Error" --text-info --filename="$1"
    elif [ -x /usr/bin/kdialog ]; then
	/usr/bin/kdialog --title "Error" --textbox "$1"
    else
	xmessage -buttons OK:0 -default OK -center -file "$1"
    fi
}

exit_code=0

exit_trap()
{
    # handily, exit_code is set to $? of y2base.
    # If there was an error and there is anything to display, pop up.
    if [ $exit_code != 0 -a -s $ERRLOG ]; then
	display_error_file $ERRLOG
    fi
    rm -f $ERRLOG
}
# redirect the output if necessary
redirect

# Accumulated arguments for both the Qt UI and y2cc; currently supported:
# --fullscreen
# --noborder
# well also for gtk and ncurses
Y2UI_ARGS=""
GNOME_SHELL="$ybindir/y2controlcenter-gnome"
KDE_SHELL="$ybindir/y2controlcenter"

printhelp()
{
	echo "Usage: $0 [OPTIONS] [MODULE] [module specific parameters]"
	echo
	echo "OPTIONS:"
	echo "	-h, --help	this message"
	echo "	-l, --list	list all available modules"
	echo "	--qt            use the QT graphical user interface"
	echo "	--gtk           use the GTK graphical user interface"
	echo "	--ncurses       use the NCURSES text-mode user interface"
	echo "	-g, --geometry	default window size (qt only)"
	echo "	--noborder      no window manager border for main window"
	echo "	--fullscreen    use full screen"
	echo
	echo "exceptional case for installing packages:"
	echo "$0 OPTION <package> [<package> [...]]"
	echo
	echo "OPTION:"
	echo "	-i, --install	install rpm package"
	echo "	    --update 	update rpm package"
	echo "	    --remove	remove rpm package"
	echo
	echo "<package> can be a single short package name (e.g. gvim)"
	echo "which will be installed with dependency checking, or the full"
	echo "path to an rpm package (e.g /tmp/gvim.rpm) which will be"
	echo "installed without dependency checking"
	echo
}

listmodules()
{
    list=`/bin/ls -1 $YAST_PREFIX/share/applications/YaST2/*.desktop 2>/dev/null`

    if [ -z "$list" ] ; then
	echo "No modules installed"
    else
	echo "Available modules:"
	echo
	grep -h "X-SuSE-YaST-Call=" $list | \
	    sed 's|X-SuSE-YaST-Call=\([^ ]\+\)\( .*\)\?|\1|' | \
	    sort -u
    fi
}

# Probes for default desktop GUI
probe_desktop_gui()
{
    if [ "$DESKTOP_SESSION" = "gnome" -o \
         "$DESKTOP_SESSION" = "xfce" ]; then
	DESKTOP_GUI="gtk"
    elif echo $WINDOWMANAGER | grep -qi "\(gnome\|xfce\)"; then
	DESKTOP_GUI="gtk"
    else
	DESKTOP_GUI="qt"
    fi
    if [ "$DESKTOP_GUI" = "qt" -a ! -x "$KDE_SHELL" ]; then
	DESKTOP_GUI="gtk"
    fi
    if [ "$DESKTOP_GUI" = "gtk" -a ! -x "$GNOME_SHELL" ]; then
	DESKTOP_GUI="qt"
    fi
}

# Select which control center shell we want to use
select_control_center()
{
    # 'auto' detects desktop
    if [ "$WANTED_SHELL" = "auto" ]; then
	probe_desktop_gui
	WANTED_SHELL=$DESKTOP_GUI
    fi

    # select binary
    y2ccbin=""
    case "$WANTED_SHELL" in
	gtk)
	    y2ccbin="$GNOME_SHELL"
	    ;;
	*)
	    y2ccbin="$KDE_SHELL"
	    ;;
    esac
}

# Select which toolkit we want to use (F#301083)
select_gui_frontend()
{
    if [ "$WANTED_GUI" = "auto" ]; then
	probe_desktop_gui
	WANTED_GUI=$DESKTOP_GUI
    fi

    if [ "$WANTED_GUI" = "gtk" ]; then
	if check_gtk; then
	    SELECTED_GUI=gtk
	else
	    if check_qt; then
		SELECTED_GUI=qt
		WANTED_GUI=qt
		echo >&2 "GTK GUI wanted but not found, falling back to Qt."
	    else
		echo >&2 "GTK GUI wanted but not found, falling back to ncurses."
	    fi
	fi
    elif [ "$WANTED_GUI" = "qt" ]; then
	if check_qt; then
	    SELECTED_GUI=qt
	else
	    if check_gtk; then
		SELECTED_GUI=gtk
		WANTED_GUI=gtk
		echo >&2 "Qt GUI wanted but not found, falling back to GTK."
	    else
		echo >&2 "Qt GUI wanted but not found, falling back to ncurses."
	    fi
	fi
    elif [ "$SELECTED_GUI" != "gtk" -a "$WANTED_GUI" != "ncurses" ]; then
	echo >&2 "Unknown GUI '$WANTED_GUI', falling back to ncurses."
    fi
}

TEMP=`/usr/bin/getopt -o hlg:s:Si --long help,list,kcontrol,geometry:,style:,strings,install,update,remove,fullscreen,noborder,qt,gtk,ncurses \
     -n 'yast2' -- "$@"`

if [ $? != 0 ] ; then echo "Exit." >&2 ; exit 1 ; fi

# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"

while true ; do
	case "$1" in
		-h|--help) printhelp; exit 0 ;;
		-l|--list) listmodules; exit 0 ;;
		-g|--geometry) Y2_GEOMETRY="-geometry $2"; shift 2; ;;
		-i|--install) Y2_INSTALL_PACKAGES=true; shift ;;
		--update) Y2_INSTALL_PACKAGES=true; Y2_INSTALL_ACTION=--update; shift ;;
		--remove) Y2_INSTALL_PACKAGES=true; Y2_INSTALL_ACTION=--remove; shift ;;
                --fullscreen) Y2UI_ARGS="$Y2UI_ARGS --fullscreen"; shift ;;
		--noborder)   Y2UI_ARGS="$Y2UI_ARGS --noborder"  ; shift ;;
		--kcontrol)   Y2UI_ARGS="$Y2UI_ARGS --kcontrol_id YaST" ; shift ;;
		--qt)  export CMDLINE_UI="qt"  ; shift ;;
		--gtk)  export CMDLINE_UI="gtk"  ; shift ;;
		--ncurses)  unset DISPLAY ; shift ;;
		--) shift ; break ;;
		*) echo "Unrecognized option $1" ; exit 1 ;;

	        # IMPORTANT: Remember to change that "getopt" call above, too
	        # if you change anything here!
	esac
done

if [ "$Y2_INSTALL_PACKAGES" = "true" ]; then
	export module=sw_single
	# #222757
	# prepend an additional argument if necessary
	set -- $Y2_INSTALL_ACTION "$@"
else
	# allow module as argument, defaults to "menu"
	export module="${1-menu}"
	shift
fi

# Pass the arguments to WFM::Args():
# Surround all args by (...).  args may contain spaces.
# Use -S to avoid YCP escaping (bnc#382883)
# But avoid a lone -S (cc-gnome dies, bnc#537470)
if [ $# -gt 0 ]; then
    a=("$@")
    b=("${a[@]/#/(}")
    c=("${b[@]/%/)}")
    set -- -S "${c[@]}"
fi

case "`basename $0`" in
	YaST|yast|yast1|zast)
		if [ -z "$CMDLINE_UI" ]; then
			unset DISPLAY;
		fi
	;;
esac

if [ "$UID" = 0 ]; then
    echo $$ > /var/run/yast.pid
fi

# set lang from sysconfig
set_lang_from_sysconfig

# default defaults
WANTED_GUI="auto"
WANTED_SHELL="auto"
DESKTOP_GUI="qt"

# read system settings
if [ -f /etc/sysconfig/yast2 ]; then
    source /etc/sysconfig/yast2
fi
# read user settings
if [ -f "$HOME/.yast2/yast2" ]; then
    source "$HOME/.yast2/yast2"
fi

if [ ! -z "$CMDLINE_UI" ]; then
    WANTED_GUI="$CMDLINE_UI"
    WANTED_SHELL="$CMDLINE_UI"
fi

# Fallback GUI
SELECTED_GUI=ncurses
# if we have a DISPLAY, select a preferred GUI
if [ -n "$DISPLAY" ]; then
    select_gui_frontend
fi

if [ "$SELECTED_GUI" = "ncurses" ]; then
    if check_ncurses ; then
	TTY=$(/usr/bin/tty)
	TTY=${TTY#/dev/}
	case "$TTY" in
	    tty[0-9]|tty[0-9][0-9])
	        TTY=console
		;;
	esac
	
	# The part below has changed: we don't use 'testutf8' any longer, i.e.
	# don't start YaST in UTF-8 locale by default and don't fix the settings
	# in rxvt*|vt*|xterm*|linux|screen* (trust the locale).
	# See bnc#556555 and bnc#436378.
        if test "$TERM" = "linux" -a "$TTY" = "console" ; then
	    case "$LANG" in
		# if it is known that a language doesn't yet work well with ncurses
		# on console use English instead:
		ja*|ko*|zh*)
		    if test `locale charmap` = "UTF-8" ; then
			export LANG=en_US.UTF-8
			export LC_CTYPE=en_US.UTF-8
			export LC_ALL=en_US.UTF-8 # just to make sure.
		    else
			export LANG=en_US
			export LC_CTYPE=en_US
			export LC_ALL=en_US # just to make sure.
		    fi	
		    ;;
	     esac	
	fi

	# this fixes launching of interactive subprocesses, #150799
	#Y2UI_ARGS="$Y2UI_ARGS --nothreads"
        #uncomment the above line if anything in TUI breaks ;-)
        #threads are welcomed back in ncurses frontend (F#301899)

	# set color theme, if defined
	if [ ! -z "$Y2NCURSES_COLOR_THEME" ]; then
	    export Y2NCURSES_COLOR_THEME="$Y2NCURSES_COLOR_THEME"
	fi

    else
	rpm -V yast2-core yast2-ncurses yast2-qt yast2-gtk >&2
	echo "Something is wrong with the YaST user interface." >&2
	exit_code=1		# also skips y2base later
    fi
    if [ -n "$DISPLAY" -a ! -t 0 ]; then
	rpm -V yast2-core yast2-ncurses yast2-qt yast2-gtk >&2
	echo "Something is wrong with the YaST user interface, NCurses selected but no terminal available." >&2
	exit_code=1		# also skips y2base later
    fi
# quick hack: treat gtk like qt
elif [ "$SELECTED_GUI" = "qt" -o "$SELECTED_GUI" = "gtk" ]; then

    if [ "$SELECTED_GUI" = "qt" ]; then
	set_qt_home_dir
    fi

    # find which control center shell we want, if there is none we
    # fall back to the built-in ycp menu
    y2ccbin=""
    if [ $module == "menu" ]; then
	select_control_center
    fi

else
    echo >&2 "Internal error, unhandled '$SELECTED_GUI'"
fi


# do it!
# $@ are args for ycp
if [ $module == "menu" -a -f "$y2ccbin" ] ; then
    $y2ccbin $Y2UI_ARGS "$@"
    exit_code=$?
else
    # In case YaST has to be restarted, create this file
    # and exit. Script that creates the file should also
    # remove it itself.
    case "$module" in
	# special cases
	menu) REDO_FILE=/var/lib/YaST2/restart_menu ;;
	online_update) REDO_FILE=/var/lib/YaST2/selected_patches.ycp ;;
	# all other cases when YaST has to be restarted
	*) REDO_FILE=/var/lib/YaST2/restart_yast ;;
    esac
    #  break out on errors, #343258
    while [ $exit_code = 0 ]; do
	$ybindir/y2base $module "$@" "$SELECTED_GUI" $Y2_GEOMETRY $Y2UI_ARGS
	exit_code=$?
	if [ -z "$REDO_FILE" -o ! -f "$REDO_FILE" ]; then
	    break
	fi
    done
fi

if [ "$UID" = 0 ]; then
    rm -f /var/run/yast.pid
fi

exit $exit_code

ACC SHELL 2018