August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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10.1. „Demonizowanie” skryptu
Problem
Niekiedy skrypt musi zostać uruchomiony jako demon, tj. jako nigdy niekończący działania proces drugoplanowy. Aby wykonać tę operację prawidłowo, trzeba odłączyć kod skryptu od nadzorującego go terminala tty, a dokładniej od sesji terminala, która uruchomiła proces demona. Zwykłe dodanie znaku ampersand na końcu wiersza polecenia nie jest wystarczającym rozwiązaniem. W przypadku uruchomienia skryptu demona w zdalnym systemie za pomocą usługi SSH (lub podobnego mechanizmu) można zauważyć, że po wylogowaniu sesja SSH nie zostaje zakończona, a okno terminala pozostaje widoczne do czasu zakończenia pracy skryptu (który jako demon nigdy nie kończy swojego działania).
Rozwiązanie
Aby uruchomić skrypt w tle, zapewniając ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
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.