From: Tobias Leupold <tl@stonemx.de>
To: ~alpine/users@lists.alpinelinux.org
Subject: Re: ash and su/su -
Date: Wed, 29 May 2024 12:42:54 +0200
Message-ID: <2369059.BjyWNHgNrj@ginuog>
In-Reply-To: <20240527204907.py3IhgpW@steffen%sdaoden.eu>
References: 
 <1926392.IobQ9Gjlxr@ginuog> <2207810.C4sosBPzcN@ginuog>
 <20240527204907.py3IhgpW@steffen%sdaoden.eu>
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Hi Steffen!

> It all depends on the actual shell.  If you have bash, then ensure
> ~/.bashrc exists, bash will read it.

It's not about bash, but about the default shell (which is BusyBox's ash, 
no?).

I don't get where the prompt after "su" even comes from ... I left the default 
/etc/profile untouched, which is

    export PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin"
    
    export PAGER=less
    umask 022
    
    # use nicer PS1 for bash and busybox ash
    if [ -n "$BASH_VERSION" -o "$BB_ASH_VERSION" ]; then
            PS1='\h:\w\$ '
    # use nicer PS1 for zsh
    elif [ -n "$ZSH_VERSION" ]; then
            PS1='%m:%~%# '
    # set up fallback default PS1
    else
            : "${HOSTNAME:=$(hostname)}"
            PS1='${HOSTNAME%%.*}:$PWD'
            [ "$(id -u)" -eq 0 ] && PS1="${PS1}# " || PS1="${PS1}\$ "
    fi
    
    for script in /etc/profile.d/*.sh ; do
            if [ -r "$script" ] ; then
                    . "$script"
            fi
    done
    unset script

When I do a plain "su", I get a prompt that would be defied as "\w #". Where 
is that defined?! It neither matches /etc/profile, nor the PS1 definition in 
my user's ~/.profile, nor the one in /root/.profile ...