CODEWITHSUNDEEP
pythonlinuxunixterminal
Hari Teja Reddy
Hari Teja Reddy

Reputation: 11

How to supply raw_input to a python program running on a terminal window in linux from a different terminal, all running on same UNIX

I have 2 terminals open in a unix system. On one terminal I have a python program running that accepts raw_input, and I want to supply this raw_input from the other terminal that is not running this python program.

I tried something like:

echo 3 > /dev/pts/172

But this is just printing the number 3 on the terminal but not really doing the function of giving "3" and ENTER key from keyboard

terminal 1 being /dev/pts/252 and terminal running python program being /dev/pts/172

Upvotes: 0

Views: 182

Answers (1)

jcoppens
jcoppens

Reputation: 5440

If the idea is to feed a program remotely, a fairly popular solution is not to use stdin for input, but to open a pipe, and have the program listen to the pipe. You can then open the pipe in another program, and send data to it. If you use named pipes, you can even echo to the pipe.

Sending data to stdin of another terminal (and, as such, to raw_input), is obviously a dangerous idea, as this would permit executing commands in someone else's terminal.

Directing to /proc/script_PID/fd/0 won't work - this is linked to the same device in /dev/pts/.

Upvotes: 1

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