August 2012
Intermediate to advanced
624 pages
17h 11m
Polish
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6.16. Utworzenie prostego menu
Problem
Chcemy uruchomić krótki skrypt SQL w odniesieniu do kilku baz danych. Zadanie skryptu SQL polega na przygotowaniu baz danych do wykonania określonych testów. Nazwę każdej bazy danych można by oczywiście wpisywać w wierszu poleceń, ale chcemy wykorzystać bardziej interaktywne rozwiązanie. W jaki sposób można napisać skrypt powłoki, który pozwoliłby na wybranie jednej nazwy z listy?
Rozwiązanie
Aby utworzyć proste tekstowe menu, wystarczy zastosować polecenie select. Oto przykład:
#!/usr/bin/env bash
# plik receptury: dbinit.1
#
DBLIST=$(tail –n +2 ./listadb)
select DB in $DBLIST
do
echo Inicjowanie bazy danych: $DB
mysql -uuser -p $DB <inicjowanie.sql
donePomińmy na razie problem przypisania wartości zmiennej ...
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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.