November 2012
Intermediate to advanced
888 pages
54h 46m
Polish
Content preview from Ruby. Receptury
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20.1. Uruchamianie procesu-demona w systemie Unix
Problem
Chcemy uruchomić proces w tle tak, by użytkownicy i system operacyjny w jak najmniejszym stopniu ingerowali w jego działanie.
Rozwiązanie
W języku Ruby w wersji 1.9 można wywołać metodę Process.daemon, która przekształca bieżący proces w demon. W innym przypadku najbardziej niezawodnym sposobem jest skorzystanie z modułu Daemonize. Nie jest on dostępny w postaci gemu, ale warto go pobrać i zainstalować, ponieważ dzięki niemu pisanie demonów jest łatwe i skuteczne:
#!/usr/bin/ruby # daemonize_daemon.rb require 'tempfile' require 'daemonize' include Daemonize # Zaimportowanie klasy Daemonize::daemonize do bieżącej # przestrzeni nazw puts 'Za chwilę proces zamieni się w demon.' ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.