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tandrea85
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 [help] comando grep

voglio usare il comando grep per verificare un pattern e se lo uso in questo modo funziona
command | grep 'ciao$'
(cerca ciao alla fine dell'output generato da command)

ma quello che voglio fare è ke ciao sia messo in una variabile, ma in questi modi non me la valuta
VAR=ciao
command | grep '$VAR$'
o
command | grep '($VAR)$'

qualcuno mi può illuminare? grazie
06-06-2006 11:05
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Alf
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Non ho capito molto bene il problema ... :pensa:

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06-06-2006 11:22
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tandrea85
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te lo faccio piu semplice allora

grep 'pattern' nomefile

questa è la sintassi base.. scrivendolo per es cosi funziona

grep 'ciao' nome.txt

ma io lo voglio cosi
VAR=ciao
grep '$VAR' nome.txt

nell'ultimo caso credo che $VAR me lo interpreta come il pattern $VAR e non 'ciao' come vorrei io
06-06-2006 11:34
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Alf
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Ah ok.
Vuoi fare uno script in cui il pattern da cercare sia variabile ...

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06-06-2006 12:18
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tandrea85
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Originally posted by Alf
Ah ok.
Vuoi fare uno script in cui il pattern da cercare sia variabile ...

ecco non mi venivano quelle parole :D
06-06-2006 12:21
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Alf
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Mhhh controlla i pm :D

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06-06-2006 12:36
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tandrea85
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Originally posted by Alf
Mhhh controlla i pm :D

scrivi pure qua cosi forse puo essere utile anke ad altri

cmq quello ke mi hai detto con gli apici inversi

VAR=ciao
grep `echo $VAR` nome.txt

non viene accettato come parametro dalla grep
06-06-2006 13:02
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Alf
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Ufff mhhh e che non posso controllare ;)

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06-06-2006 13:03
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tandrea85
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risolto, la soluzione era questa

VAR=ciao
command | grep $VAR'$'
06-06-2006 14:14
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