to export environment variables in a file
 

hi,
I want to export the env variables in a file using a script,i tried using the below:
for var in 'env'
do
var2=env|awk -F '=' '{print$1}'
echo "$var;export $var2">file.txt
done
but i m nt getting the desird o/p,i need every variable to be appended with ;export "variable name" in the target file wil sm1 hlp pls

Hi,

What you have written is very confusing.Please elaborate with proper example.

Refer this link for exporting environmental variables http://tldp.org/LDP/abs/html/othertypesv.html

Hi

Prayag is right - explain in what context you are trying to export your environment variables - what is it that you're trying to achieve in the bigger picture?

Also:

Please read the LQ Rules. Writing in "text" short form of words is not allowed - so please refrain from doing this.

Hi,

I wish to take the o/p of env command(which will give the list of environment variables) in a file say env_file.txt.for example, say env_file has the below content:

ORACLE_HOME=/data/oracle/app/product/ora10g
PWD=/home/amit
.
.
.
Now , i wish to create another file myappfile through a script which will have the contents like below:
ORACLE_HOME=/data/oracle/app/product/ora10g;export ORACLE_HOME
PWD=/home/amit;export PWD

'myappfile' is required for my application.

Hi,

Follow this example on your command line you will get the answer yourself:

Hi

From the terminal try:

This should create myappfile.txt with the environment variables. Test this and if it gives you what you require then you can easily put into a script.

I have one application which requires the 'myappfile' as it is below:

ORACLE_HOME=/data/oracle/app/product/ora10g;export ORACLE_HOME
PWD=/home/amit;export PWD


Currently what we do is we manually create the myappfile by adding ";export variablename " for each environment variable.

I need a script which will append the ";export variablename " at the end of each variable and the endresult would be :

ORACLE_HOME=/data/oracle/app/product/ora10g;export ORACLE_HOME
PWD=/home/amit;export PWD

Read this post around how to append to a file with the sed command.

Thus your process to do this would be to write the env variables to your output file and then use sed to append "; export XXXXX"

Note you need to read up and understand sed before you can achieve this.

I don't think it is a good idea, anyway. The reason is that the env command prints out all the current environment, including dynamic variables like PWD, OLDPWD and _. Why not create your own environment, instead? You can limit the environment to what actually is necessary to your script. Just my :twocents:

Thanx colucix,It worked..for dynamic variables we regenerate the required file.