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Bug 122847 - + metachar not ed compatible
+ metachar not ed compatible
Product: Fedora
Classification: Fedora
Component: less (Show other bugs)
i386 Linux
medium Severity low
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Assigned To: Jindrich Novy
Mike McLean
Depends On:
  Show dependency treegraph
Reported: 2004-05-09 01:44 EDT by Mikel Ward
Modified: 2013-07-02 19:00 EDT (History)
1 user (show)

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Fixed In Version:
Doc Type: Bug Fix
Doc Text:
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Clone Of:
Last Closed: 2005-10-19 06:48:37 EDT
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oVirt Team: ---
RHEL 7.3 requirements from Atomic Host:
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Description Mikel Ward 2004-05-09 01:44:40 EDT
From Bugzilla Helper:
User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.6)
Gecko/20040506 Epiphany/1.2.4

Description of problem:
Less(1) claims to be ed(1) compatible in the man page, as one would
expect from most Unix utilites except for Awk, Egrep, Perl, etc., but
in Less + is used as a metacharacter unescaped, so matching a literal
+ requires the pattern be \+.  This is the opposite of ed, and is
rather confusing.

Version-Release number of selected component (if applicable):

How reproducible:

Steps to Reproduce:
1. man bash
2. /:+


Actual Results:  Taken to the first instance of the literal ":" in the
bash(1) manual page (the "OPTIONS" section).

Expected Results:  Taken to the first instance of the literal ":+" in
the bash(1) manual page (the "Use Alternate Value" section).

Additional info:

A quick look at the Less home page suggests it plugs into many
different regex libraries.

It looks like the version of Less distributed with Red Hat/Fedora uses
enhanced regular expressions rather than basic regular expressions. 
If  this is the case, the manual page must be updated to reflect this.
Comment 1 Jindrich Novy 2005-10-19 06:48:37 EDT
This is now fixed by the less-392.

man page now states that:
The pattern is a regular expression, as recognized by the regular expression
library supplied by your system.

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