topic Re: Regex tips in Operating System - HP-UX

Regex tips

2xyo — Thu, 28 Jan 2010 14:19:05 GMT

Dear,

I have this regular expression wich works fine on linux with sed 4.1.5 :

# echo "bla: 567/1234" | sed -n -e "s_.*\s\([0-9]*\)/\([0-9][0-9][0-9][0-9]\).*_\1_p"
567

Now, i try this on HP-UX 11iv1 but it return nothing...
I also try with :
echo "bla: 567/1234" | sed -n -e "s_.*\[:space:]\([0-9]*\)/\([0-9][0-9][0-9][0-9]\).*_\1_p"

i suspect \s doesn't work with this version of sed (sed --version doesn't works on HP..)

Any help would be appreciate

Re: Regex tips

James R. Ferguson — Thu, 28 Jan 2010 14:37:52 GMT

Hi:

First, HP's 'sed' lacks the power of the GNU 'sed'. Even things like '\s' for whitespace are missing.

In lieu of using:

\s*

...you can use:

[[:space:]]*

Notice the double brackets where you only used single ones.

Hence, this works on HP-UX:

# echo "bla: 567/1234" | sed -n -e "s_.*[[:space:]]\([0-9]*\)/\([0-9][0-9][0-9][0-9]\).*_\1_p"
567

Regards!

...JRF...

Re: Regex tips

2xyo — Thu, 28 Jan 2010 14:52:44 GMT

Thanks

It's works (forget double bracket..) :
echo "bla: 567/1234" | sed -n -e "s_.*[[:space:]]\([0-9]*\)/\([0-9]*\).*_\1_p"