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Comparing content of two variables

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# 1  
Old 07-29-2011
Comparing content of two variables

I have very abstract need of "comparing two variables" and take subsequent actions.

please refer to image below

I have a part of script which reads a file and generates variables based on content of this file.(Variables generated in same shell)

The reason i have categorized the design in user and script environment is that the script environment must be able to handle changes made in user environment.
The changes will only be in the form of new line entries in file1.txt

I need help on how to move from desired output to final outputSmilie
# 2  
Old 07-29-2011
How about this:

while [ $# -gt 1 ]
    grep -wq "$arg" file1.txt && echo $arg=$val

# 3  
Old 07-29-2011
It will just print

What i need is for this code:
echo "a1 is " $a1

output i have now:I have reached up to here)
a1 is a1

output i need now is:
a1 is 1

If i change your code to
grep -wq "$arg" file1.txt && echo $arg=$val > file_out && source file_out

I will get what i need.
But again. there is one more problem.. since i am not experienced with grep, i will need your help.
my file1.txt is actually like this:
$source_dir/script_B_1 a1 >$output_dir/scriptb1
$source_dir/script_B_2 a2 b2 >$output_dir/scriptb2
$source_dir/script_B_3 a3 b3 c3 >$output_dir/scriptb3

Now i need to extract just the arguments in file_out.
how to proceed?

Last edited by animesharma; 07-29-2011 at 02:14 AM..
# 4  
Old 07-29-2011
Could this help you ?
$>cat infile
$source_dir/script_B_1 a1 >$output_dir/scriptb1
$source_dir/script_B_2 a2 b2 >$output_dir/scriptb2
$source_dir/script_B_3 a3 b3 c3 >$output_dir/scriptb3

$>awk '{$1=$NF=""}1' infile

 a2 b2
 a3 b3 c3

# 5  
Old 07-29-2011
printing out just the arguments is not what i am looking at.

consider the file1 and file2 below.

$source_dir/script_b_1 a1 >$output_dir/scriptb1
$source_dir/script_b_2 a1 a2 >$output_dir/scriptb2

$source_dir/script_b_1 $a1 >$output_dir/scriptb1
$source_dir/script_b_2 $a1 $a2 >$output_dir/scriptb2

what i want is..
either format file1 to file2 or format file2 to file1

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