[bug #27323] without -i, \s is not respected

[Pierre]

URL:
  <http://savannah.gnu.org/bugs/?27323>

                 Summary: without -i, \s is not respected
                 Project: grep
            Submitted by: pierre
            Submitted on: mer 26 aoû 2009 14:14:15 GMT
                Category: None
                Severity: 3 - Normal
              Item Group: None
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

> grep -V
GNU grep 2.5.3
(i didn't success in compiling the cvs version)

I was wondering which one-letter options exists in grep
$> man grep | grep -E "^\s+-[a-zA-Z][, ]"
       -L, --files-without-match
       -l, --files-with-matches
it unescapes the s and look for (at least) "s-"

$> man grep | grep -icE "^\s+-[a-zA-Z][, ]"
37
with -i switch, no problem

$> man grep | grep -E "s-"
       -L, --files-without-match
       -l, --files-with-matches
with bigger files, you know that the resulting regex is not only "s-"

then i've concatened a lot of manpages to test
$> grep -r . /usr/share/man/man* | cut -d" " -f3 > lsman
$> for i in `cat lsman`; do man $i >> allman; done
(this takes a lot of time, i stopped it when allman was 819101 lines, 39
Mib)

$> grep -cE "^\s+-[a-zA-Z][, ]" allman
93
$> grep -icE "^\s+-[a-zA-Z][, ]" allman
9778
$> grep -cE "^ +-[a-zA-Z]+s-[a-zA-Z]" allman
369
(trying to find the regex who will bring to 93)
$> grep -cE "^ +-[a-zA-Z][, ]" allman
9778
a space instead of \s is ok

$> grep -iE "^\s+-[a-zA-Z][, ]" allman | sort -u > allopts
i do that so i can send the file
$> wc -l allopts 
4877 allopts
$> grep -cE "^\s+-[a-zA-Z][, ]" allopts 
41

so i should grep all lines of allopts, but it takes only 41 (all containing
"s-[a-zA-Z]")

i'm not sure \s is ok to mean space, but why it is working with -i



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File Attachments:


-------------------------------------------------------
Date: mer 26 aoû 2009 14:14:15 GMT  Name: allopts  Size: 242 ko   By: pierre

<http://savannah.gnu.org/bugs/download.php?file_id=18645>

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