I want to know the full information about the
SIGTTIN signal, for example I want to know if the
SIGTTIN signal can be handled or not.
This documentation only says the following about the
SIGTTIN 21,21,26 Stop Terminal input for background process
man SIGTTIN in the terminal didn't return anything.
What I meant was not what signals you can send to a process, but rather whether the process that receives the signal can change the signal's default action. For example: the default action for the
SIGTTIN signal is to stop the process, you can change this default action in your program using the
sigaction() function. Now some signals don't allow you to change their default actions, and this is what I'm looking for (a documentation of what signals that don't allow you to change their default actions).