Hi all,
I m new to shell programming..Can anyone please guide me how to insert data at a specified location in the file..
I have a configuration file..I want to add data to it through script..I am able to do it...I get that data written at end of my configuration file..I want data to be placed at a specified location...
As,I have a header [mydata] in my configuration file..I want to place the data here...
Is it possible to do that...
Example:
My configuration file:
[global]
hello
aaa
bbbb
[share]
gghg
hnnmm
bbb
[mydata]
gggg
[printing]
cvbvbb
vbvbb
Now,I want my data to be entered after header [mydata], not at the end of Configuration file...

Thanking you...

If the line you want to enter can be inserted just after the [mydata] header, you can use sed with the "a" command:
You could enclose the sed command in double quotes and use a variable containing the line you want to insert.

But you have to make sure your sed delimiter isn't a part of the data being inserted...
ta0kira

Hi,
Thanks so much..This has helped me to understand the concept...
Actually,This is my script which inserts the data into the configuration file..

#!/bin/bash
CF="/etc/samba/smb-test.conf" //Configuration file
.....................
...............

insert_mod() { //Function to insert data into config file
NCF="$CF.$$"
[ ! -f $CF ] && touch $CF || :
V="$1"
grep -v -E "^$V=" $CF > $NCF
mv -f $NCF $CF
eval echo "$V\"'\${$V}'\"">> $CF

}
hello=yes
insert_mod hello //Function called with argument
else
illegal
fi
...............

I have tried different alternatives using sed..But,not able to insert in the file under mydata..
Please assist me...
Thanks so much....

jschiwal;
In your example, "inserted line" appears after every instance of "[...]"

Did you actually try the solution jschiwal offered? It worked for me.

Hi,
It did worked..If we directly write the data in sed command...
but,if i want to take it as variables....
V=hello
i mean :sed '/\[mydata\]/a $V' file..
It will print $V..not the value of variable...
Here,m facing the problem....
Can you guide me on this ...
Thanking you...

For this line by line processing, I would use awk. as below.

While line doesn't begin with [mydata], write the line.
Write the line that begins with [mydata].
Write a new line with your specific data.
Write all balance lines.

HTH.

End

Use weak rather than strong quoting i.e.

This was mentioned here - please read your replies carefully..

Hi,
Thanks i used the code in double quotes for variable..It worked...
Thanks....