nixCraft

I have written a small script to execute a program which is written in c++. Now the program expects input from keyboard while i need to pass that from the variable. How can I do that? Pardon me..i am a beginner.

It is possible to pass variable using standard I/O or just variable. For example:
Another option is use < input redirect option
gedit will open /tmp/file.txt file. You may have to modify c++ program try above and let me know. You can pass / play with argc and argv in main(). If argc is zero ask for input else read from command line via shell variable.

Let me know if you need any help

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Vivek Gite
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Thanks nix

i am calling a program called "cdrtool" . I cant modify this program.

when I normally execute from command line
$ cdrtool m12 p

The 'p' is to get the input from keyboard. But i wanted to pass this value from a file. It takes the input and gives me an input.
so tried like this (which was not working)

#!/bin/sh

ls -1 *.asc > file1
cat file1 | \
while read line
do
cdrtool m12 p | $line
done
rm file1
exit
now i have changed this to as below and it works

#!/bin/sh

ls -1 *.asc > file1
cat file1 | \
while read line
do
echo $line | cdrtool m12 p
done
rm file1
exit
Anyway thanks a lot for ur reply..i will aslo try ur method and learn how it works. Since i will be learning more in coming days, I may have questions for which i would need ur help. Thanks.

There are many ways to solve one problem. I’m glad that you sorted it out with pipes
Sure forum is for discussion. Feel free to use whenever you need help!

__________________
Vivek Gite
Linux Evangelist
Be proud RHEL user, and let the world know about your enterprise choices! Join RedHat user group.
Always use CODE tags for posting system output and commands!
Do you run a Linux? Let's face it, you need help