Further to this, I am having trouble porting existing scripts to bash-3.2's new style of regex matching.
Here is one example that is problematic: I want to use a character class in my regex, but bash seems to get confused by the ':]]' closing the class, and apparently takes it as a ']]' closing the conditional expression. Here is a distilled test case: [[ $line =~ [[:space:]]*(a)?b ]] && echo match || echo no match I used single quotes around the RHS in bash-3.1, which worked very well. How should this be written so as to work with bash-3.2 -- and, of course, still with bash-3.1? Tim. */
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