Yeah i know what a background process is, but as told to you before, it's a concept of shell and is not implemented by the OS/kernel. By writing './my &' at the shell prompt, you are telling shell to run my as a background process. The POSIX theory you refered to doesn't refer to this kind of process as this process does have a controlling terminal and can safely read/write from/to the terminal.
You're incorrect. Please, consult the POSIX specification before disseminating false statements.
Of all the process groups, associated with a controlling terminal, one is designated the foreground process group via a call to
int tcsetpgrp (int fildes, pid_t pgid_id);
Members of the foreground process group are allowed to read/write to/from the controlling terminal. Members of the background process groups receive SIGTTIN/SIGTTOU signals, whose default action is to stop the process.
~velco
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