Shell Programming and Scripting

Hi,

I have this line in a file called test.cfg

SOURCEFILE=/usr/platform/sun4v/driver/file.cfg

But i have many occurances of "SOURCEFILE" in test.cfg , i need to search only for this line and replace that line with

SOURCEFILE=/usr/platform/sun4x/driver/file.cfg

again there are many occurences of sun4v in that file but i need to replace only in this line. I tried grep for "SOURCEFILE="and using perl -pi -e but it replaces wherever it finds "sun4v" but i want only on this line.

Please help me.

Thanks.

This is in the sed FAQ.

For GNU sed:

Code:

sed '0,/sun4v/s//sun4x/' filename

For other seds:

Code:

sed -e '1s/sun4v/sun4x/;t' -e '1,/sun4v/s//sun4x/' filename

I am not sure I totally understand what you want to replace and how to find it but if you want to replace the whole line you can do:

sed 's/SOURCEFILE=\/usr\/platform\/sun4v\/driver\/file.cfg/SOURCEFILE=\/usr\/platform\/sun4x\/driver\/file.cfg/' test.cfg

Hi radoulov,

I tried your option but again it does replaces all the occurences of sun4v but i want to look for that line and replace the occurence only in that line.

Hi borgeh

I tried the same option with perl -pi -e as

perl -pi -e 'SOURCEFILE=\/usr\/platform\/sun4v\/driver\/file.cfg/SOURCEFILE=\/usr\/platform\/sun4x\/driver\/file.cfg/g' test.cfg

but for some reasons it didnt work too. Actually iam executing this script as a finish script when the machine is jumpstarted.
Once the machine is build i checked the file it had no changes, but if i execute it manually it does change.I couldnt figure out whats the problem.
Please help me.

Thanks for your suggestions.

Could you post a sample from your file?
What's your OS and sed version?

Oops, sorry, I had to insert the hole pattern

Code:

sed -e '
1s#SOURCEFILE=/usr/platform/sun4v/driver/file.cfg#SOURCEFILE=/usr/platform/sun4x/driver/file.cfg#;t' -e\ 
'1,/SOURCEFILE=\/usr\/platform\/sun4v\/driver\/file.cfg/s//SOURCEFILE=\/usr\/platform\/sun4x\/driver\/file.cfg/
' filename

And, of course (from the FAQ):

Hi,

The file looks like

SUN4V_AVERAGE_MESSAGE_SIZE=128
SUN4V_MESSAGES_IN_INITIAL_RESPONSES=6500
SUN4V_ENFORCE_YIELD_NAMES=FALSE

Similar to the above lines there are lots of variable declarations with the variable SUN4V

#SOURCEFILE_LOCATION---------------------------

SOURCEFILE=/usr/platform/sun4v/driver/file.cfg


I want to search only for this occurence and replace the sun4v with sun4x variable but not anywhere else

Iam not sure how to check the veriosn of sed. iam using solaris 8.


Thanks a lot.

This should be straightforward with my sed-suggestion above.