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Top Forums Programming Terminal emulator from scratch. Post 302504428 by Corona688 on Monday 14th of March 2011 02:41:30 PM
Old 03-14-2011
Quote:
Originally Posted by howdini
The only time I received an isatty related error was with a few interactive types of programs like top. It said that the tty check failed, just as you said some of them would. passwd on the other hand launches well and requests for some input.
If stdin isn't a terminal, it will open /dev/tty directly and talk to the terminal through that. This bypasses your pipes completely.
Quote:
getting it this input and retrieving the next output is proving to be the challenge. I hope you are not saying that this method completely cannot work with interactive programs.
I am; I tried to warn you about this from the beginning.

Not that this has been a waste of your time. There is a way to do this, closely related to what you've been doing -- instead of creating and duplicating pipes over things, create and duplicate a virtual terminal. It acts sort of like a pipe, with some important differences -- it's bidirectional, for one thing. And ctrl-c characters will cause the kernel to send SIGINT, etc, like you'd expect to happen in a terminal. here's an example I wrote back when I was playing with vterms and linked early in this thread. It'll be trickier than using pipes but related so it's a good thing to have gotten pipes working first.
 

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vodovod(6)							       Games								vodovod(6)

NAME
vodovod - lead the water from the house to the storage tank SYNOPSIS
vodovod DESCRIPTION
Vodovod is a free game, released under GNU GPL license. Graphics and programming are done by Milan Babuskov. This is an over-weekend project for now, so don't expect miracles. However, game is completely playable. The goal of the game is to reach the highest possible score. You get a limited number of pipes on each level and need to combine them to lead the water from the house at the top of the screen to the storage tank at the bottom. For each pipe water goes through, you get 20 points and if you fill the cross-pipe both ways, you get 60 points. At end of each level, you are awarded depending on the skill level: * Beginner: 100 points * Toolman: 100 points + number of pipes remaining * Master plumber: 100 points + 2 x number of pipes remaining Some of the levels have obstacles where you cannot place pipes, checkpoints through which the water must go and holes in the ground that slow the flow. Select HELP from the main menu to get more info. The game is playable with joystick/joypad: just move it and press buttons when you go to Options -> Configure controls USAGE
The goal of the game is to use pipes to connect the house at the top of the screen with the tank at the bottom. You have time to construct the initial pipeline before the man enters the house. For each level you get a limited number of pipes, so use them wisely. If you make a mistake, you can place another pipe over it. There are certain special blocks in the map: * Blocked Area - You cannot place pipes on these fields. * Checkpoint - Your pipeline must go through this field. * Hole in the ground - Slows down the flow. SEE ALSO
You can find more information at http://home.gna.org/vodovod/ May 2007 vodovod(6)
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