script

Wtr · 08-10-2007, 07:57 AM

Hello;
i want to write a script that:
opens a directory
(opens another script and) changes 1 value somewhere in the text,
and saves again this file under a different name.
as in:
cd "dirname"n with n running from 1 to 100 for example
vi filename
:.,$s/nr40/job-n-

to change text blabla nr40 to blabla nr-n-
or use sed or something?

and then save as filename-n-

so how do u do the loop over n and how to do this correctly?

yes i;m a noob
thanks

wjevans_7d1@yahoo.co · 08-11-2007, 01:36 AM

I haven't replied up to now, hoping someone else would come along.

I was hoping someone would come along with a cool, simple, elegant solution. Maybe that will still happen.

My approach would be to use Perl. That gives you as much control over the situation as you could want. "Control" means things like checking the input data for validity if you wish.

You know Perl?

ocicat · 08-11-2007, 12:56 PM

Quote:

Originally Posted by Wtr

i want...

Although Perl is a flexible language & an excellent suggestion, its learning curve cannot be ignored.

I am guessing that the original poster wants to write a shell script to automate this task. If so, your best option (outside of using a dynamic language like Perl or Python...) is to learn sed. You can find a number of sed tutorials on the Web (simply search for sed tutorial...). Wikipedia has an article on sed & IBM developerWorks has a series of articles which cover learning sed.

PTrenholme · 08-11-2007, 03:24 PM

Or use a simple language like gawk which includes a system() function for executing system calls from withing a gawk program.

ocicat · 08-11-2007, 06:41 PM

Quote:

Originally Posted by PTrenholme

Or use a simple language like gawk which includes a system() function for executing system calls...

awk (gawk == GNU awk) is yet another good choice. I just remembered the following shell scripting tutorial which might be good material for gluing awk code or sed code together:

http://steve-parker.org/sh/sh.shtml

ghostdog74 · 08-11-2007, 09:11 PM

Code:

sed -i 's/dir/test/g' dirname?/*.sh

the above is just for n=0-9.
as for changing the filename, its just another statement using mv.

Wtr · 08-12-2007, 08:14 AM

Thanks guys. Gonna look into the sed and awk stuff

/bin/bash · 08-12-2007, 01:10 PM

I made 20 directories. I put a file in each directory script. In each script is the text "bla bla nr40 bla"
Now you want to go into each directory and change script so nr40 is nr<dirno> and also rename the file to script<dirno>.

Code:

$for i in $(seq 1 20);do mkdir $i;echo "bla bla nr40 bla" >$i/script;done

$cat 1/script
bla bla nr40 bla

$for i in $(seq 1 20);do sed -i "s/nr40/nr${i}/" $i/script;mv $i/script $i/script$i;done

$cat 1/script1
bla bla nr1 bla

HTH

Wtr · 08-13-2007, 02:30 AM

Quote:

Originally Posted by /bin/bash

Code:

$for i in $(seq 1 20);do mkdir $i;echo "bla bla nr40 bla" >$i/script.sh;done

thanks, but it states "illegal variable name" here.

/bin/bash · 08-13-2007, 05:29 AM

Code:

$for i in $(seq 1 20);do mkdir $i;echo "bla bla nr40 bla" >$i/script;done

Sorry that was typo!