Re: egrep oddity
On 2012-02-05 22:31 +0100, Tomas Volka wrote:
> On Ne 05-02-12 | 16:03, Neal Murphy wrote:
>> For quite some time now, I've been getting peeved with egrep not doing what it
>> I have Squeese installed and up-to-date. In an xterm running bash or on a
>> console running bash or dash, this command:
>> ls -C1 | egrep "^[A-Z]"
>> returns all lines except those beginning with 'a'. Even the following commands
>> exhibit similar behavior:
>> alias|sed -e 's/^a/b/'|egrep "^[A-Z]" # passes sed's output untouched
>> alias|sed -e 's/^a/A/'|egrep "^[A-Z]" # passes sed's output untouched
>> These commands behave the same way on another Squeeze installation at another
>> location. Also, 'grep -E' behaves the same way.
>> The commands behave as expected on a different GNU/Linux system.
>> Does anyone else see this behavior? Or do I need to clean my pipe and smoke
>> something better?
> The "^[A-Z]" range will never match line beginning with a, since the range
> matches only uppercase characters.
Not quite true, this very much depends on the locale.