August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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19.13. Śledzenie przebiegu skryptów
Problem
Nie możemy ustalić, jak przebiega praca skryptu oraz dlaczego nie dostarcza spodziewanych wyników.
Rozwiązanie
W początkowej części uruchamianego skryptu należy dodać instrukcję set –x. Można również włączyć mechanizm debugowania (xtrace) przed problematycznym fragmentem kodu (za pomocą polecenia set –x) i wyłączyć go po wykonaniu podejrzanej sekcji (za pomocą polecenia set +x). Niekiedy przy tej okazji zasadne okazuje się wprowadzenie zmian w znaku zgłoszenia $PS4 (zgodnie z informacjami zawartymi w „16.2. Dostosowanie znaku zachęty”). Mechanizm debugowania kodu xtrace działa również w powłokach interaktywnych (co również zostało opisane w „16.2. Dostosowanie znaku zachęty”). Oto przykład skryptu, który ...
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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.