embedded linux, tty not working during boot

Question

I'm writing a software to test some peripherals on my device. I have to check some tty devices, so I writed a C binary that writes and reads from a given tty. It works perfectly called from command line, but it doesn't work if called from an init.d script. Any ideas?

Answer 1

Login prompt appears after start-up scripts are executed - that is why they are called start-up scripts.

I am not sure changing the order would be wise and safe. I would probably wait (sleep) for a while. Just don't forget to run your program in the background mode, otherwise it'll block boot process:

my_test_tty_program &