How to load program reading stdin and taking parameters in gdb?

Question

I have a program that takes input from stdin and also takes some parameters from command line. It looks like this:

cat input.txt > mypr         


        

Answer 1

And if you do not need to debug from the very beginning you can also attach to an already running process by using:

$ gdb myprogram xxx

where xxx is the process id. Then you do not need to tell gdb the starting arguments.