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How to give a text file as input while running a program?

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# 1  
Old 01-14-2013
How to give a text file as input while running a program?
Hi Friends,

I am running a program

Code:
/path/to/program -i 1 100 -o /path/to/output/op_1_100.txt

In the above command, I have to try various number of combinations at the -i parameter and the output file name varies with each combination.

Now, I have my -i parameter text file, which is like this

Code:
cat input.txt
1 101
1 150
1 235
1 600

and the corresponding output file names in another file called output.txt

Code:
cat output.txt
op_1_101.txt
op_1_150.txt
op_1_235.txt
op_1_600.txt

So, I would like to run my command this way

Code:
/path/to/program -i /path/to/input.txt -o /path/to/output.txt

Any pointers are highly appreciated towards this issue.
# 2  
Old 01-14-2013
Assuming that all output file names follow the same pattern as in your example, you don't need output.txt (the output file names can easily be created from input.txt). I use the Korn shell, but this will also work with bash, or any other shell that accepts basic Bourne shell syntax:
Code:
#!/bin/ksh
while read x y
do      echo /path/to/program -i "$x" "$y" -o /path/to/output/"op_$x_$y.txt"
done < input.txt

Try it with the echo to be sure it creates the commands you want to run; then remove the echo and rerun this script to run your program once for each line in input.txt.
This User Gave Thanks to Don Cragun For This Post:
jacobs.smith
# 3  
Old 01-14-2013
Quote:
Originally Posted by Don Cragun
Assuming that all output file names follow the same pattern as in your example, you don't need output.txt (the output file names can easily be created from input.txt). I use the Korn shell, but this will also work with bash, or any other shell that accepts basic Bourne shell syntax:
Code:
#!/bin/ksh
while read x y
do      echo /path/to/program -i "$x" "$y" -o /path/to/output/"op_$x_$y.txt"
done < input.txt

Try it with the echo to be sure it creates the commands you want to run; then remove the echo and rerun this script to run your program once for each line in input.txt.
Hi Don,

Thanks for the script.

But the $x value is not being printed in the output file name.

And also, my output file names might vary and they should be read from the output.txt file.

Any suggestions?
# 4  
Old 01-14-2013
The $x prints in both places when I run it; but if you want the names from the second file instead of using the pattern present in your sample files, the following should work as long as lines in input.txt and output.txt are in the same order and there are at least as many lines in output.txt as there are in input.txt:
Code:
#!/bin/ksh
while read x y
do      read of <&3
        echo /path/to/program -i "$x" "$y" -o /path/to/output/"$of"
done < input.txt 3< output.txt

This User Gave Thanks to Don Cragun For This Post:
jacobs.smith
# 5  
Old 01-14-2013
Quote:
Originally Posted by Don Cragun
The $x prints in both places when I run it; but if you want the names from the second file instead of using the pattern present in your sample files, the following should work as long as lines in input.txt and output.txt are in the same order and there are at least as many lines in output.txt as there are in input.txt:
Code:
#!/bin/ksh
while read x y
do      read of <&3
        echo /path/to/program -i "$x" "$y" -o /path/to/output/"$of"
done < input.txt 3< output.txt

Thats all I need Don!

Thanks for your time and a perfect solution.
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