Calling system() if certain text appears on the screen.


 
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# 1  
Old 04-01-2019
Calling system() if certain text appears on the screen.

Hi.


I'm wondering if it is possible to execute system(), if a certain string of text appears on the screen or not?
I want to be able to run system("rz -Z") based on if "B00000000000000" appears on the screen.
rz is a program to recieve files via Zmodem protocol. Is this possible? In C, of course.


Any help and/or input is greatly appreciated.
# 2  
Old 04-01-2019
Quote:
Originally Posted by ignatius
I'm wondering if it is possible to execute system(), if a certain string of text appears on the screen or not?
I want to be able to run system("rz -Z") based on if "B00000000000000" appears on the screen.
I don't see why not. "appears on screen" means basically it is part of the output stream of your tty device - intercept that and you will be able to notice when the string appears there. You will also have to find out which terminal you are attached to.

I hope this helps.

bakunin
# 3  
Old 04-01-2019
Thanks for the reply. Would popen() be of any use?
# 4  
Old 04-02-2019
Ok. Solved it. Basically used getchar() to get user input to initiate Zmodem download.
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