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bug#17156: [PATCH 2/5] Revert conversion to shell scripts

From: Paul Eggert
Subject: bug#17156: [PATCH 2/5] Revert conversion to shell scripts
Date: Tue, 01 Apr 2014 07:54:37 -0700
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:24.0) Gecko/20100101 Thunderbird/24.4.0

Paolo Bonzini wrote:

Even though egrep and fgrep have been deprecated, most users
will be using them instead of grep -E and -F, on MS Windows systems
too where the native command shell is used.

That's not my experience; more and more, people are using grep -E and -F. Regardless, people who lack working shells can switch to grep -E and -F, which is what they're supposed to have been doing for decades anyway.

If you want these backward-compatibility hacks to be executables rather than shell scripts, please make them separate little programs that simply do an execlp of 'grep'. We shouldn't keep going on like we were doing, with a tricky setup within 'grep' itself that was a maintenance hassle and had subtle bugs. We should have separation of concerns: the 'egrep' and 'fgrep' parts should be cleanly separated from the main part of 'grep'.

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