August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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2.9. Przekazanie danych wyjściowych i komunikatów o błędach do tego samego pliku
Problem
Wykorzystując mechanizm przekierowania, można przekazać dane wyjściowe i komunikaty o błędach do różnych plików. Ale w jaki sposób można zapisać wynik i komunikaty o błędach w jednym pliku?
Rozwiązanie
Należy użyć odpowiedniej składni instrukcji, która zapewnia przekierowanie strumienia błędów w to samo miejsce, do którego kierowany jest strumień wyjściowy.
Forma zalecana:
$ obydwa >& plik_wynikowylub
$ obydwa &> plik_wynikowyStarszy i nieco mniej przejrzysty sposób zapisu:
$ obydwa > plik_wynikowy 2>&1W przedstawionych przykładach ciąg obydwa odpowiada potencjalnemu programowi, który wygeneruje dane zarówno dla strumienia STDERR, jak i strumienia STDOUT.
Analiza ...
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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.