Help needed in string manipulation

haifrancis · #1 (**permalink**) 09-08-2006

Hi,
Im a newbie to UNIX Shell Scripting.

I have a variable "filename" which contains the value "fileone.out". I need help in doing some string manipulation on this variable to change the extension alone and the result should be "fileone.txt", since i need to use this new value to refer another file.

Regards,
Amby.

vino · #2 (**permalink**) 09-08-2006

Code:

old_name=fileone.out
new_name=${old_name%%.out}.txt

Chanakya.m · #3 (**permalink**) 09-08-2006

why %% is required? I tried without %%, hot an error. Can u explain :-(

-Chanakya

vino · #4 (**permalink**) 09-08-2006

Quote:

Originally Posted by Chanakya.m

why %% is required? I tried without %%, hot an error. Can u explain :-(

-Chanakya

Look under 'Parameter Expansion' in man sh for ${parameter%%word}

haifrancis · #5 (**permalink**) 09-08-2006

Hi Vino,
Thanks a lot

It worked.

Regards,
Amby.

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