After suspending child process with SIGTSTP, shell not responding

Question

I\'m coding a basic shell in C, and I\'m working on suspending a child process right now.

I think my signal handler is correct, and my child process is suspending, b

Answer 1

I might be late to answer the question here but this is what worked when I was stuck with the same problem. According to the man pages for tcsetpgrp()

The function tcsetpgrp() makes the process group with process group ID pgrp the foreground process group on the terminal associated to fd, which must be the controlling terminal of the calling process, and still be associated with its session. Moreover, pgrp must be a (nonempty) process group belonging to the same session as the calling process.

If tcsetpgrp() is called by a member of a background process group in its session, and the calling process is not blocking or ignoring SIGTTOU, a SIGTTOU signal is sent to all members of this background process group.

So, what worked for me was ignoring the signal SIGTTOU in the shell program, before I created the processes that would come to the foreground. If I do not ignore this signal, then the kernel will send this signal to my shell program and suspend it.