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Old 01-31-2009, 11:41 AM   #1
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Pattern matching in a bash case statement using regex

I keep finding conflicting information regarding the ability to use regex in a bash case statement. Is this possible and if so what is the proper syntax when using regex for the pattern to match?

Old 01-31-2009, 12:20 PM   #2
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The man page should be the "definitive guide" about that. I read in mine:
case word in [ [(] pattern [ | pattern ] ... ) list ;; ] ... esac
    A  case command first expands word, and tries to match
    it against each pattern in turn, using the same match‐
    ing rules as for pathname expansion. (see Pathname
    Expansion below).
This tells me it does not doe regexp's, but it does do the (simpler) pathname pattern expressions. So it does the same as for example: "ls *.txt" but also a little more complex patterns like: "ls my_*-[0-9].sh". But not the entire regular expression syntax.


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