[illumos-Developer] Requesting code review for opensource /usr/xpg4/bin/more replacement with "less" ...

[Roland Mainz]

Hi!

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Below are the webrev(s) which integrate the "less" utility as
opensource replacement for /usr/xpg4/bin/more. The same webrev
provides the usual "less" utilities.

The webrev come in two flavors:

1. "less" compiled with plain regex API:
http://cr.opensolaris.org/~gisburn/illumos_b520_xpg4more_plainregex/

2. "less" compiled with an extended regex API which allows alternative
pattern systems to be used in searches, e.g. (?P)pattern for perl
pattern, (?Si)pattern for case-insensitive shell patterns etc.:
http://cr.opensolaris.org/~gisburn/illumos_b520_xpg4more_perlregex/

Notes:
- The code provides /usr/bin/less, /usr/bin/lessecho and
/usr/bin/lesskey and a softlink from /usr/xpg4/bin/more to
../../bin/less (=/usr/bin/less) as part of the base packages
- "less" will switch to POSIX "more" mode when launched as "more"
- The code is compiled with XPG6 flags to make sure XPG[64] version of
matching libc calls are made (e.g. XPG4 version of |system()|) to
ensure POSIX conformance.

ToDo:
- Make a choice which regex engine we'll use
- There is one issue with multibyte characters I'm currently investigating
- Integrate review feedback

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Bye,
Roland

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