Shell Programming and Scripting

Hi All,

I need some info.

Could you please tell me how to use the variable of a parent shell in the subshell. Also can we modify the variable in the subshell ? If yes, will the modified variable visible in the parent shell

I am using two prg.

a.sh
#!/usr/bin/ksh
temp_var="abhishek"
b.sh
echo $temp_var


b.sh
#!/usr/bin/ksh
source a.sh
temp_var="sdfdf"

The source keyword in the b.sh is giving me error.


Thanks in advance
Abhishek Gera

The environment of a parent process is inherited by the child process but not visa versa.
An example to achieve this is:

first.sh:

Code:

#!/bin/ksh

var=100
echo "Before : $var"
var=$(. ./second.sh)
echo "After: $var"

second.sh:

Code:

#!/bin/ksh

let "var = var + 50"
echo $var

Regards

Thanks for the reply....

Also can you suggest me how to make a variable as global variable in the shell script.

Like if we are running programs like a package, how can I access a variable defined in any other script ?


Thanks in advance
Abhishek Gera

If you want to share variables with scripts written by yourself maybe named pipes is a better alternative.
Google for "named pipes in shell".

Regards