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Re: [bug] Home dir in PS1 not abbreviated to tilde


From: Eric Blake
Subject: Re: [bug] Home dir in PS1 not abbreviated to tilde
Date: Tue, 13 Mar 2012 09:42:22 -0600
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1

On 03/13/2012 09:27 AM, Eric Blake wrote:
> Be aware that both approaches will misbehave if HOME is a root directory
> (/ or //), where you _don't_ want to strip trailing slashes.  So you
> really want:
> 
> case $HOME in
>   *[^/]* ) HOME=${HOME%${HOME##*[^/]}} ;;
> esac

Actually, shortening /// to / is okay (it's only // that must not
unconditionally be shortened to /, due to POSIX specification and Cygwin
behavior of //), so a modified version would be:

case $HOME in
  *[^/]* ) HOME=${HOME%${HOME##*[^/]}} ;;
  / | // ) ;;
  *) HOME=/ ;;
esac

-- 
Eric Blake   address@hidden    +1-919-301-3266
Libvirt virtualization library http://libvirt.org

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