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Re: How to include `$$' literally in the PS1 prompt?
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From: |
Andreas Schwab |
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Subject: |
Re: How to include `$$' literally in the PS1 prompt? |
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Date: |
Sun, 07 Oct 2007 19:41:59 +0200 |
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User-agent: |
Gnus/5.110006 (No Gnus v0.6) Emacs/22.1 (gnu/linux) |
"Clark J. Wang" <dearvoid@gmail.com> writes:
> On 9/30/07, Andreas Schwab <schwab@suse.de> wrote:
>>
>> "Clark J. Wang" <dearvoid@gmail.com> writes:
>>
>> > Anybody has any idea?
>>
>> PS1='[\\$\\$=$$ \w] \$ '
>
>
> Sure it works but I don't think this is the way it should be. In this way,
> to include `\\' in the prompt we have to write like this:
>
> $ PS1='\\\\\\\\'
>
> It's really hard to read and understand. Isn't it a bug?
No. There are two levels of expansion, each using the same quote
character (the backslash). You can disable the second level with `shopt
-u promptvars', so that quote removal is not applied to the value.
Andreas.
--
Andreas Schwab, SuSE Labs, schwab@suse.de
SuSE Linux Products GmbH, Maxfeldstraße 5, 90409 Nürnberg, Germany
PGP key fingerprint = 58CA 54C7 6D53 942B 1756 01D3 44D5 214B 8276 4ED5
"And now for something completely different."