stdin

I want to open a Python script using subprocess in my main python program. I want these two programs to be able to chat with one another as they are both running so I can monitor the activity in the slave script, i.e. I need them to send strings between each other. The main program will have a function similar to this that will communicate with and monitor the slave script: Script 1 import subprocess import pickle import sys import time import os def communicate(clock_speed, channel_number, frequency): p = subprocess.Popen(['C:\\Python27\\pythonw','test.py'], stdin=subprocess.PIPE, stdout

How to pipe input from a file as stdin to an erlang program running in the shell as well as standalone? I have a file hr.erl and I compile it from the shell. There is a function in it which accepts input from stdin using io:fread() . I have written a case expression with guards where if it matches {ok, [0]} it should terminate. Instead of 0 , I actually need it to be eof . How to send eof when running in a shell? I have a file inp.txt with values 1 2 3 and 0 on each line. How can I pass it using the < pipe operator? Is there anything like erl -hr <inp.txt ? Can I pipe it to stdin within the

I'm writing a ncurses based chat program. At first, I wrote just networking stuff (without ncurses) and everything worked fine, but after adding graphics I can't get the client app to work properly. The main problem is reading from stdin and socket at the same time. In ncurses-less version I've used pthread and it worked like charm. Alas, it seems that pthread and ncurses don't go together very well, so I had to find another solution. I thought that select() would do, but it still only reads from stdin and completely ignores the socket. Here is the whole code: code The interesting part is:

I'm trying to write a simple php script to take in data from stdin , process it, then write it to stdout . I know that PHP is probably not the best language for this kind of thing, but there is existing functionality that I need. I've tried <?php $file = file_get_contents("php://stdin", "r"); echo $file; ?> but it doesn't work. I'm invoking it like this: echo -e "\ndata\n" | php script.php | cat . and get no error messages. The script I'm trying to build will actually be part of a larger pipeline. Any clues as to why this is not working? PS: I'm not very experienced with PHP. If you are piping

I'm trying to execve a process that reads from stdin. I want to prepare stdin with some data so it can execute successfully. How can I do that? You will need to fork the execve call into a child process and then create a pipe from the parent process to the child's stdin. Take a look at this link for a detailed example on how to use pipes: http://tldp.org/LDP/lpg/node11.html 来源： https://stackoverflow.com/questions/12611457/how-to-write-to-stdin-of-execved-process