shellchooser.sh

#!/bin/sh
#!/bin/sh -e
# The -e option for /bin/sh (dash) at the she-bang,
# makes this process immediately exit
# if some condition fails, see `man sh`.

evil_eval_check=$( set | grep '^shells_.*=' | cut -f 1 -d '=' )
if test "x" != "x${evil_eval_check}"
        then
                echo 'Been injected with a posion.'
                exit 0
fi
i=0
i=$(( i + 1 ))
eval "shells_${i}=byobu"
i=$(( i + 1 ))
eval "shells_${i}=bash"
i=$(( i + 1 ))
eval "shells_${i}=bash\ +o\ history"
eval "shells_${i}_desc=bash\ without\ history"
default_choice=2
timeout_milliseconds=15
j=0
printf "\n"'Choose one of the following shells:'"\n"
while true
        do
                j=$(( j + 1 ))
                if test "x" != "x"$( ( eval 'echo "${shells_'${j}'_desc+y}"' ) )
                        then
                                desc=\$shells_${j}_desc
                else
                                desc=\$shells_${j}
                fi
                eval "echo ' - '$j') '$desc'.'"
                test "$j" -lt "$i" || break
done
echo ' - ''q'') ''exit without changes''(default).'
echo -n 'Press the identifier of your choice: '
#chosen_shell=$( while ! head -c 1 ; do true ; done )
# http://stackoverflow.com/a/32270158/165330 .
readchr () {
        old_stty_cfg=$( stty -g )
        stty -echo raw min 0 time ${timeout_milliseconds}
        printf '%s' $(dd bs=1 count=1 2>/dev/null)
        stty $old_stty_cfg
}
chosen_shell=$( readchr )
if [ "x" = "x$chosen_shell" ]
        then
                #echo 'setting default choice('$chosen_shell').'
                chosen_shell=$default_choice
fi
if test "1" != "$chosen_shell" && test "2" != "$chosen_shell" && test "3" != "$chosen_shell"
        then
                exit 1
fi
eval "shell_choice=\$shells_${chosen_shell}"
if command -v wmctrl >/dev/null 2>&1 && test "byobu" = "$shell_choice"
        then
                $( wmctrl -r :ACTIVE: -b add,maximized_vert,maximized_horz )
fi
if test "bash" = "$shell_choice"
        then
                $( wmctrl -r :ACTIVE: -b add,maximized_vert,maximized_horz )
                clear
fi
exec $shell_choice

thnX :)

de output zonder -vx is wel een stukkie fraaier ..
En ik ben ook benieuwd naar de output vanuit een andere shell omgeving dan bash .