linux-kernel - case-duplicated filenames

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Date:	Mon, 10 Aug 2009 21:05:09 -0500
From:	"Tony Mantler" <nicoya@....ca>
To:	linux-kernel@...r.kernel.org
Subject: case-duplicated filenames

A co-worker reminded me this afternoon that the linux source tree does not
get along well with case-insensitive filesystems. Ever the curious and
bored sort, and in the middle of an sqlite bender, I decided to cook up a
quick script to find exactly what files those are.

The results (in lowercase) are as follows:
linux-source-2.6.30/include/linux/netfilter/xt_mark.h
linux-source-2.6.30/include/linux/netfilter/xt_connmark.h
linux-source-2.6.30/include/linux/netfilter/xt_dscp.h
linux-source-2.6.30/include/linux/netfilter/xt_rateest.h
linux-source-2.6.30/include/linux/netfilter/xt_tcpmss.h
linux-source-2.6.30/include/linux/netfilter_ipv6/ip6t_mark.h
linux-source-2.6.30/include/linux/netfilter_ipv6/ip6t_hl.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_ttl.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_tos.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_ecn.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_connmark.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_dscp.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_tcpmss.h
linux-source-2.6.30/include/linux/netfilter_ipv4/ipt_mark.h
linux-source-2.6.30/net/netfilter/xt_tcpmss.c
linux-source-2.6.30/net/netfilter/xt_connmark.c
linux-source-2.6.30/net/netfilter/xt_mark.c
linux-source-2.6.30/net/netfilter/xt_dscp.c
linux-source-2.6.30/net/netfilter/xt_rateest.c
linux-source-2.6.30/net/netfilter/xt_hl.c
linux-source-2.6.30/net/ipv4/netfilter/ipt_ecn.c
linux-source-2.6.30/documentation/io-mapping.txt

And the script, if you'd like to run it yourself, is as follows (hereby
released GPL2):
#!/bin/bash

#set -x

SQLITE3=`which sqlite3`
DBNAME=filenames.db
SQLFILE=filenames.sql

DIRECTORY=linux-source-2.6.30

$SQLITE3 $DBNAME "CREATE TABLE filenames ( id INTEGER PRIMARY KEY, name
TEXT );"

echo "PRAGMA synchronous=OFF;" >$SQLFILE
echo "BEGIN TRANSACTION;" >>$SQLFILE
find $DIRECTORY | tr  '[:upper:]' '[:lower:]' | sed 's/^\(.*\)/INSERT INTO
filenames (name) VALUES ("\1");/' >>$SQLFILE
echo "COMMIT;" >>$SQLFILE

$SQLITE3 $DBNAME <$SQLFILE

$SQLITE3 $DBNAME "SELECT a.name FROM filenames a, filenames b WHERE a.name
== b.name AND a.id < b.id;"

rm $SQLFILE
rm $DBNAME

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