shell script - insert line of text into file

Galway K9

Hi guys,

if ya can help be great.

tryin to insert a line of text before a line of text saying "exit 0" on a file


____________________


"my text"


exit 0


___________________-

croo

I think sed might do what you want. Something like ...

sed '/exit/ a myText goes here' yourFilename

Now that would just modified the stream so you'd need to redirect to another new file

sed '/exit/ a myText goes here' yourFilename>newFilename

If you needed to edit in place, I think you might have to turn to awk... I am sure there are loads of examples on the web - google can always help with that!

Skrynesaver

leave out ".bak" to make no save copy

 perl -pi.bak -e 's/(^\s*exit\s+0\s*$)/My Text\n$1/;' filename

perl - obviously

-p - print all lines
-i edit in place
.bak - extension to save backup as
-e - execute the following
's/(exit 0)/My Text\n$1/;' - substitute "exit 0" with "My Text, new line, exit 0"

filename - the file to operate on.

Galway K9

I tried the sed approach but wasnt outputting to file was just reading in life, inserting text and o/p to console.

i piped the filename to another file and then moved to original(rename). worked a treat.


Thanks

croo

Skrynesaver wrote: »

leave out ".bak" to make no save copy

 perl -pi.bak -e 's/(^\s*exit\s+0\s*$)/My Text\n$1/;' filename

perl - obviously

-p - print all lines
-i edit in place
.bak - extension to save backup as
-e - execute the following
's/(exit 0)/My Text\n$1/;' - substitute "exit 0" with "My Text, new line, exit 0"

filename - the file to operate on.

I must learn perl!
I know it's probably been around forever now but to me it's still the "new" scripting language