# vim:ft=sh:fdm=marker
#
# configuration used for an absolute minimal ksh shell.
# Reason: reference no files in /usr/, so that FS can be umounted.

# skip this setup for non-interactive shells
[[ -o interactive && -t 0 ]] || return

export PATH="/bin:/sbin/:/usr/bin/:/usr/sbin:/usr/local/bin:/usr/local/sbin:${HOME}/bin:/opt/bin"
export EDITOR='ed'

if [[ -x $(which vim) ]] ; then
    export VISUAL='vim'
else
    export VISUAL='vi'
fi
if [[ -x $(which less) ]] ; then
    export PAGER='less'
else
    export PAGER='more'
fi

FPATH=/usr/share/ksh/functions
HISTSIZE=500
HISTEDIT="$EDITOR"

# some options.
set -o emacs -o trackall -o globstar

# aliases for various command shortcuts
alias ls='ls --color=auto'  # we're on grml, so we do have GNU ls.
alias ll='ls -lFb'
alias la='ls -LaFb'
alias pu='ps -fu $USER'

# Use keyboard trap to map keys to other keys
# note that escape sequences vary for different terminals so these
# may not work for you
trap '.sh.edchar=${keymap[${.sh.edchar}]:-${.sh.edchar}}' KEYBD

if [[ -x $(which infocmp) ]] && [[ -x $(which sed) ]] ; then
    # reading some special keys from terminfo database.
    # should work everywhere. hopefully.
    typeset -A keymap
    infocmp -L | sed '1,2d;s/\t//;s/, /\n/g;s/,$//' | \
        while read -r line ; do
            key="${line%=*}"
            seq="${line#*=}"
            case "$key" in
                key_left)       keymap+=( [$(print "$seq")]=$'\cb' ) ;;
                key_right)      keymap+=( [$(print "$seq")]=$'\cf' ) ;;
                key_up)         keymap+=( [$(print "$seq")]=$'\cp' ) ;;
                key_down)       keymap+=( [$(print "$seq")]=$'\cn' ) ;;
                key_home)       keymap+=( [$(print "$seq")]=$'\ca' ) ;;
                key_end)        keymap+=( [$(print "$seq")]=$'\ce' ) ;;
                key_backspace)  keymap+=( [$(print "$seq")]=$'\ch' ) ;;
                key_dc)         keymap+=( [$(print "$seq")]=$'\cd' ) ;;
            esac
        done
else
    # fallback, does not work in all terminals.
    keymap=(
        [$'\eOD']=$'\eb'   # Ctrl-Left  -> move word left
        [$'\eOC']=$'\ef'   # Ctrl-Right -> move word right
        [$'\e[3~']=$'\cd'  # Delete     -> delete to right
        [$'\e[1~']=$'\ca'  # Home       -> move to beginning of line
        [$'\e[4~']=$'\ce'  # End        -> move to end of line
    )
fi

# put the current directory and history number in the prompt.
# use a wrapper for 'cd' to get '~' instead of /home/foo/.
function _cd {
    "cd" "$@"
    [[ $PWD = $HOME* && $HOME != / ]] && _pwd=\~"${PWD#$HOME}" && return
    _pwd="$PWD"
}
alias cd=_cd
_cd .
PS1='(!)-$_pwd\$ '