Hi all

I'm making a terminal program( using c ), that will provide a shell. User can input commands and this program will give some feedback.

I have to make the program running all the way.
My thought is:
I provide a command called 'detach', when recieve 'detach' my program will go into background and return the bash to user.( I 'm not certain how to do it yet)
Then when user exec 'program attach' in bash, will re-attaching to background process and give user shell.( absolutely have no idea how to do it)

Will you please give me some hints to solve this two problems, especially the second one?

Thanks advanced.

The functionally that you are explaining seems a lot like the program 'screen' try doing "screen PROGRAM-NAME" to 'detach' hit Ctrl+a+d. Attaching is done by screen -r. This should save you a lot of time instead of programming it yourself. For more information have a look at "man screen".

Exactly. What is the general way to do it? Hate to read source code...
thanks.

Screen is already installed on most distros. I'm unsure from your previous post but it seems like you don't want to use screen and want to embed the code into your program? Or maybe your not understanding exactly what screen is. In your terminal just issue the command where PROGRAM= any linux program that hangs and waits for user input. For example try Do what you want in nano hit CTRL+a+d to hop out of it and to resume where you left off. If you finished the rest of your terminal program you could try using screen on that to see if it behaves the way you want it to.

If you really insist on coding the detach and attach functionality yourself, my only guess is that you'll have to use fork() in order to send the program to the background. Try googling "c fork detach". I still think your better off using screen, unless this is some sort of school assignment or something for work. Good luck, hope you don't end up reading the source code because it is nasty