Consider such script:
echo a echo b echo c
It will produce 3 lines and now I can run it like this:
abc_script | real_program
real_program will get in its input those 3 files. However, there is a problem for a user, instead of just calling
abc_script, she/he has to remember to redirect the output to the
So how to move this redirection to the script? Something like this (the script):
echo a | echo b | echo c | real_program
This does not work, it is only an illustration what I would like to do -- hide calling of
real_program inside the script.
For the record: in my case the input consists of some file, additional extra lines. So I have:
cat $input_file echo $extra_line
Not just a,b,c.