I have a test program that uses unnamed pipes created with pipe() to communicate between parent and child processes created with fork() on a Linux system.
I have a Linux process that is being called numerous times, and I need to make this process as fast as possible.
Basically I\'m wondering why this doesn\'t output anything: tail --follow=name file.txt | grep something | grep something_else
I\'m looking for a way to pipe the output of the *nix screen command to another program. In theory I would like 开发者_开发百科to be able to do something like:
Most languages support two-way process communication.For example, in Python, I can (sloppily) do: >>> from subprocess import *
In Linux (2.6.35-22-generic), man pipe states that pipe()createsa pipe, a unidirectional data channel that can be used for interprocess communication.\"
On the command line, if I run echo -n \"foo\" | openssl aes-128-cbc -k \"key\" -base64 -e (the -n flag prevents echo from adding a newline to the end of its output), I get
How do I get the filename from redirection from the shell in my C++ code? i.e. ./MyProgram < myfile , I want to get myfile as the filename and its content line by line.
I have a question. I\'m currently working on program in QT (C++) and I have this pro开发者_如何学编程blem. If I check the checkbox, it starts a method, where is implement fork (). Parent process conti
Just started learning/using pipes and was wondering how to route file output of an application into a pipe so that another application can use it.
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