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Date: Thu, 27 Aug 2020 11:49:21 -0500
Message-ID: <CALMX==VwQKSwHZgCDSLA0nJdFRRBpoynx--_NK2r0FqCNKBafA@mail.gmail.com>
Subject: Re: Wrong expansion of ~/
To: cygwin AT cygwin DOT com
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From: rifter via Cygwin <cygwin AT cygwin DOT com>
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On 8/27/20, Morten Kjærulff via Cygwin <cygwin AT cygwin DOT com> wrote:
> On Tue, Aug 25, 2020 at 3:00 PM Brian Inglis wrote:
>>
>> On 2020-08-25 01:15, Morten Kjærulff via Cygwin wrote:
>> > On Mon, Aug 24, 2020 at 10:41 PM Brian Inglis wrote:
>> >>
>> >> On 2020-08-24 06:36, Morten Kjærulff via Cygwin wrote:
>> >>> On Mon, Aug 24, 2020 at 11:52 AM Thomas Wolff wrote:
>> >>>> Am 24.08.2020 um 10:05 schrieb Morten Kjærulff via Cygwin:
>> >>>>> I have a script that starts several tmux panes with my favorite
>> >>>>> commands.
>> >>>>> In some (*some* and only *sometimes*) of the panes I see:
>> >>>>>
>> >>>>> -bash: /home/xxxxxP/.git-completion.bash: No such file or directory
>> >>>>> -bash: /home/xxxxxP/.git-prompt.sh: No such file or directory
>> >>>>>
>> >>>>> My .bashrc has:
>> >>>>>
>> >>>>> $ grep git .bashrc
>> >>>>> . ~/.git-completion.bash
>> >>>>> . ~/.git-prompt.sh
>> >>>>>
>> >>>>> My userid is xxxxxf (and not xxxxxP).
>> >>>>>
>> >>>>> Is this known?
>> >>>> What if you trace `echo $HOME; echo ~` after the `.`? I have
>> >>>> occasional
>> >>>> cases where $HOME and ~ start to be different in my shell, which is
>> >>>> quite weird and should not happen according to bash documentation.
>> >>>
>> >>> Ok,
>> >>>
>> >>> My userid is xx00mkf.
>> >>>
>> >>>
>> >>> If I add:
>> >>>
>> >>> . ~/.git-completion.bash
>> >>> if [ ! $? = 0 ] ; then
>> >>>   echo "HOME=" $HOME
>> >>>   echo "~=" ~
>> >>> fi
>> >>>
>> >>> I see:
>> >>>
>> >>> -bash: /home/xx00m/.git-completion.bash: No such file or directory
>> >>> HOME= /home/xx00mkf
>> >>> ~= /home/xx00m
>> >>>
>> >>>
>> >>> If I add:
>> >>>
>> >>> . ~/.git-completion.bash
>> >>> if [ ! $? = 0 ] ; then
>> >>>   echo "HOME=" $HOME
>> >>>   echo "~=" ~
>> >>>   echo "~/.git-completion.bash=" ~/.git-completion.bash
>> >>> fi
>> >>>
>> >>> -bash: /home/xx00m/.git-completion.bash: No such file or directory
>> >>> HOME= /home/xx00mkf
>> >>> ~= /home/xx00mkf
>> >>> ~/.git-completion.bash= /home/xx00mkf/.git-completion.bash
>> >>
>> >> HOME dir depends on entries in:
>> >>
>> >>         /etc/nsswitch.conf
>> >>
>> >> whether you have /etc/passwd and/or /etc/group files and their entries;
>> >>
>> >> your SAM and/or AD entry contents including e.g.
>> >>
>> >>         $ net user $USER | grep '^Comment'
>> >>         Comment         <cygwin home="/home/..." group="Users"...>
>> >>
>> >> You can check if any of these are in effect by running:
>> >>
>> >>         $ getent passwd $USER
>> >>
>> >> If you think they are relevant, you might also want to try to trace and
>> >> debug
>> >> your bash-completion setup scripts:
>> >>
>> >>         $ set -vx
>> >>         $ . /etc/profile.d/bash_completion.sh |& tee
>> >> /tmp/completion.log | less
>> >>
>> >> to see what they are doing that might affect other settings.
>> >
>> > Thanks, but ~ changes from xx01m to xx01mkf (which is correct) between
>> > a few commands in .bashrc:
>> >
>> > If I add:
>> >
>> > . ~/.git-completion.bash
>> > if [ ! $? = 0 ] ; then
>> >   echo "HOME=" $HOME
>> >   echo "~=" ~
>> >   echo "~/.git-completion.bash=" ~/.git-completion.bash
>> > fi
>> >
>> > I see (*sometimes*):
>> >
>> > -bash: /home/xx00m/.git-completion.bash: No such file or directory
>> > <<<wrong
>> > HOME= /home/xx00mkf
>> > ~= /home/xx00mkf <<<correct
>> > ~/.git-completion.bash= /home/xx00mkf/.git-completion.bash <<<correct
>>
>> Well then you have to trace and debug those commands run from your .bashrc
>> where
>> ~ changes, perhaps using bashdb?
>
> I really don't know how I can debug this?
>
> With this:
>
> . ~/.git-completion.bash
>
> ~ is *sometimes* expanded wrongly:
>
> With this:
>
> while [ ! ~ = $HOME ] ; do
>   echo "$0: !!! ~ =! \$HOME" >&2
> done
> . ~/.git-completion.bash
>
> I *sometimes* see an endless loop.
>
> With this:
>
> while [ ! ~ = $HOME ] ; do
>   echo "$0: !!! ~ =! \$HOME" ~ $HOME >&2
> done
> . ~/.git-completion.bash
>
> I see no error.
>
> I have a script that I run under mintty. The script starts tmux, with
> some panes. I see the error *sometimes* in *some* panes (not the same
> every time).
>
> /Morten
> --
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>

I've had funky results from time  to time on  ~ expansion in cygwin
bash. usually it works fine. But sometimes one of the terminal windows
gets into a state where ~ becomes something that isn't all that
intelligible and breaks scripts. I forget if starting a new terminal
fixes it - usually I just quit using ~ until I end up rebooting. Never
really tracked it down.
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