[Bug 292557] grep can not see through symlinks

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=292557

--- Comment #6 from aryeh.friedman@gmail.com ---
(In reply to Simon Wollwage from comment #5)
Regardless of whether POSIX formally mentions it, thousands of cross-platform
projects rely on -r and -R. A simple GitHub search for "grep -R" returned 1,500
repositories, compared to only ~80 for -rs and 181 for -r -s.

Many ports and automation tools depend on this behavior for safe, atomic
operations, such as SCMs that separate baseline repositories from change sets.

Importantly, in this case the code base is a life-critical, 100% custom EMR
system handling remote medical IoT. That means “toy” approaches like git are
not considered safe, and any argument about strict POSIX compliance is
irrelevant to real-world correctness and safety.

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