Modify just one field on one line in many files !!!

[octar]

Hi,

I have recently created around 100 printers and need to modify one field in one line of each of the hundred configuration files:

FILE: /var/spool/lpd/pio/@local/custom/prt001:hp@p001
FILE: /var/spool/lpd/pio/@local/custom/prt002:hp@p002
:
:
FILE: /var/spool/lpd/pio/@local/custom/prt101:hp@p101

The field are as follows, I need to change the + to a ! at the end of the line.

prt001:MN@p001::614:_Zn%IWY:+
to
prt001:MN@p001::614:_Zn%IWY:!

The problem is that this is only one line of many in each configuration file.

Can anyone help??


I'm fine with getting each file as follows:

for i in `ls /var/spool/lpd/pio/@local/custom`
do
echo "This is the current file $i"
done

thanks in advance

 

[dickiebird]

Try this :
for i in `ls /var/spool/lpd/pio/@local/custom`
do
echo "This is the current file $i"
sed 's/\+$/\!/g' $i > $i.new
mv $i.new $i
done


HTH ((;-)))
Dickie Bird
Honi soit qui mal y pense

 

[octar]

That is nearrly got it, however... there is more then just one instance of + in the file, so this code changes all the + to ! which unfortunatly I don't want.
I'm thinking of doing a nested loop eg.

for i in printer files
for j in cat each printer file
when the line starts with ":614:_Z" change
:614:_Zn%IWY:+
to
:614:_Zn%IWY:!

does this make sense or is there an easier way?

thanks

 

[dickiebird]

I can think of one way - others will do it better :

for i in `ls /var/spool/lpd/pio/@local/custom`
do
echo "This is the current file $i"
sed 's/:614:_Z.*+/&!/g' $i > $i.new
sed 's/+!/!/g' $i.new > $i
rm $i.new
done

First find lines beginning :614:_Z & recreate line with a ! at end
Then look for +! and replace with just a '!'

HTH ((;-))) Dickie Bird
Honi soit qui mal y pense

 

[octar]

Perfect, thanks for your help Dickie Bird