[Bug 1097467] Re: bash does not fulfill --bashrc option properly

[Hugo Heden]

$ lsb_release --all
No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 12.10
Release:	12.10
Codename:	quantal


$ bash --version
GNU bash, version 4.2.37(1)-release (x86_64-pc-linux-gnu)
Copyright (C) 2011 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>

This is free software; you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

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https://bugs.launchpad.net/bugs/1097467

Title:
  bash does not fulfill --bashrc option properly

Status in “bash” package in Ubuntu:
  New

Bug description:
  I am starting a bash shell using

  $ bash --noprofile --bashrc my-custom-bash-rc-file

  Due to the --rcflag, the newly started bash should *not* execute
  commands from /etc/bash.bashrc. That is at least how I interpret `man
  bash`:

        --rcfile file
                Execute commands from file instead of the system wide initialization file /etc/bash.bashrc and the standard personal initial‐
                ization file ~/.bashrc if the shell is interactive (see INVOCATION below). 

  However, it seems that the commands in /etc/bash.bashrc are in fact
  executed.

  To see/reproduce/diagnose this, on Ubuntu I believe one can just
  invoke bash like this (as the regular user):

  $ touch testrc
  $ env -i bash --noprofile --rcfile testrc 

  The expected result would be that nothing special is printed on the
  terminal. However, there is an error message, which is printed from
  /etc/bash.bashrc. The "env -i" causes $HOME to not be set in the
  invoked shell, which in turn triggers the error. The error message is:

  > To run a command as administrator (user "root"), use "sudo <command>".
  > See "man sudo_root" for details. 

  Another way to see this -- without the "env -i" -- is to add  a
  command to /etc/bash.bashrc, such as

  echo HELLO THERE

  To trigger the bug(?), one can then just do

  $ touch testrc
  $ bash --noprofile --bashrc testrc

  The expected result would be that nothing special is shown in the
  terminal. However, it turns out that the string

  HELLO THERE

  is printed.

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