Date: Thu, 12 Apr 2012 11:14:10 -0400 From: "John D. Hendrickson and Sara Darnell" <johnandsara2@cox.net> To: Jim Pryor <dubiousjim@gmail.com> Cc: freebsd-bugs@FreeBSD.org Subject: Re: bin/166842: bsdgrep(1) inconsistently handles ^ in non-anchoring positions Message-ID: <4F86F142.2010401@cox.net> In-Reply-To: <201204120410.q3C4ACqg071289@freefall.freebsd.org> References: <201204120410.q3C4ACqg071289@freefall.freebsd.org>
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Your problem is incorrect so there is no sol'n. printf 'abc def' | grep -o '^[a-z]' is only supposed to match against abc. see grep(1) about pattern matching - there is plenty of online writeups, esp posix ieee std. see also "ant / antlr" for more about patterns and matching. Jim Pryor wrote: > The following reply was made to PR bin/166842; it has been noted by GNATS. > From: Jim Pryor <dubiousjim@gmail.com> > $ printf 'abc def' | grep -o '^[a-z]' > will match against each of the letters in 'abc', but not against any of > the letters in 'def'. > dubiousjim@gmail.com
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