On 2019-11-26 12:54 -0600, Bruce Dubbs wrote:
> On 11/26/19 9:30 AM, Xi Ruoyao wrote:
>
> > But on Arch (and some other distributions) non-login bash loads
> > /etc/bash.bashrc before .bashrc. The environments in bash.bashrc
> > may
> > pollute the LFS building environment. For example, on Arch, our
> > $PS1
> > (set in .bash_profile, should be '\u:\w\$ ') would be overwritten
> > (become `[\u@\h \W]\$ ').
>
> With the exception of PS1, is there anything else in
> /etc/bash.bashrc
> that interferes with the lfs user's environment? We could easily
> fix
> the PS1 issue by adding
>
> PS1='\u:\w\$ '
>
> to our .bashrc.
On Arch Linux it also sets $PROMPT_COMMAND, and then sources
/usr/share/bash_completion/bash_completion (!).
> We could also add a note for the user to check the contents of
> /etc/bash.bashrc and, if needed, move it out of the way.
>
> Also, I wonder if using
>
> exec env -i HOME=$HOME TERM=$TERM PS1='\u:\w\$ ' /bin/bash --rcfile
> ~/.bashrc
>
> would disable sourcing /etc/bash.bashrc.
No. I tried that.
I found a solution with Google:
/home/lfs/.bash_profile:
exec env -i ENV=$HOME/.bashrc \
HOME=$HOME TERM=$TERM PS1='\u:\w\$ ' /bin/bash --posix
/home/lfs/.bashrc:
set +o posix
set +h
umask 022
# .... (same as LFS book)
"--posix" will start POSIX mode and disable rc file loading. Then we
use "ENV=$HOME/.bashrc" to tell bash to load our .bashrc file. At last
use "set +o posix" in .bashrc to exit POSIX mode.
--
Xi Ruoyao <xry...@mengyan1223.wang>
School of Aerospace Science and Technology, Xidian University
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