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Re: Bash default /etc/bash.bashrc overwrites PS1 even if SUDO_PS1 is set


From: DJ Mills
Subject: Re: Bash default /etc/bash.bashrc overwrites PS1 even if SUDO_PS1 is set
Date: Mon, 18 Dec 2017 14:11:50 -0500

On Mon, Dec 18, 2017 at 11:25 AM, Eric Engstrom <engstrom@mtu.net> wrote:

> Dear Bash Maintainer(s),
>
> Bash's default /etc/bash.bashrc (on debian systems at least) blindly
> overwrites PS1 even if it's been set already.  This makes it difficult
> to use sudo's abiltity to set PS1 via the SUDO_PS1 env var.
>
> Perhaps overly simplistic, but the following modification seems to work
> in all the situations I've tried:
>
>     --- /etc/bash.bashrc.orig       2014-11-12 17:08:49.000000000 -0600
>     +++ /etc/bash.bashrc    2015-06-24 12:13:36.445096411 -0500
>     @@ -16,7 +16,10 @@
>      fi
>
>      # set a fancy prompt (non-color, overwrite the one in /etc/profile)
>     -PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
>     +# but only if not SUDOing and have SUDO_PS1 set; then assume smart
> user.
>     +if ! [ -n "${SUDO_USER}" -a -n "${SUDO_PS1}" ]; then
>     +  PS1='${debian_chroot:+($debian_chroot)}\u@\h:\w\$ '
>     +fi
>
>      # Commented out, don't overwrite xterm -T "title" -n "icontitle" by
> default.
>      # If this is an xterm set the title to user@host:dir
>
> Thanks,
> Eric
> --
> Eric Engstrom - engstrom@mtu.net - PGP Key: 0xC440235DF11F74CF
> $/='O'; eval ($_='print $_^pack"c25",<DATA>');
> __END__
> 58O7O26O26O84O65O74O48O42O24O4O17O75O114O6O64O89O2O68O93O39O42O49O51O52
>

I think you'll find that the string "bash.bashrc" doesn't exist in any bash
documentation. It's a thing that's
been added by your OS/distro. You need to talk to the Debian maintainer.


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