help with a script needed

[haaleaba]

Hi!

I need some help with bash scripting.

I have a string of the type:

'nuber1/number2/number3 some text'

I need to extract numerical values in the variables. What is the easiest way to do this?

Thank you!

[RobinVossen]

Sounds like Homework?
Homework Questions arnt allowed around here.
Small advice. Use SED or AWK.

[haaleaba]

Thanks for the hint. No, this is not a homework... I need to extract number of cylinders, heads and sectors from the log file and to use them to start the other program. Here is my code... It works, but seems a bit ugly, are there any better way to do this?

cyl=`grep "number of cyl" log.txt | sed -n 's/\([0-9][0-9]*\)\/[0-9][0-9]*\/[0-9][0-9]*.*/\1/p'`
head=`grep "number of cyl" log.txt | sed -n 's/[0-9][0-9]*\/\([0-9][0-9]*\)\/[0-9][0-9]*.*/\1/p'`
sect=`grep "number of cyl" log.txt | sed -n 's/[0-9][0-9]*\/[0-9][0-9]*\/\([0-9][0-9]*\).*/\1/p'`

[RobinVossen]

I guess its fine like this. I cant do sed at all so if it works it should just be fine right? ^^
What you might want to do is:

Share=`grep "number of cyl" log.txt | sed -n 's/\([0-9][0-9]*\)\/[0-9][0-9]*\/[0-9][0-9]*.*/\1/p'`
cyl=$Share
head=$Share
sect=$Share

Since I noticed you did read the same logfile for the same thing three times.

[haaleaba]

I read 3 different values from the same line, which contains keyword...

cyl/head/sect keyword and more text...

May be someone knows a way to do this in one pass?

[Franklin52]

Show us the strings you have and the output you desire.

Regards