From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Roland" <devzero@web.de>
Subject: Re: weird bash autocomplete issue
Date: Wed, 17 Dec 2008 09:45:54 +0100
Message-ID: <120501c96025$3bfca7c0$0301a8c0@bui.materna.com>
References: <545246795@web.de> <ac3eb2510812161341x6af4b26erc4254850f11a6fcc@mail.gmail.com> <1229482522.7574.6.camel@nga>
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Cc: <linux-btrfs@vger.kernel.org>
To: "Kay Sievers" <kay.sievers@vrfy.org>
Return-path: <linux-btrfs-owner@vger.kernel.org>
List-ID: <linux-btrfs.vger.kernel.org>

> On Tue, 2008-12-16 at 22:41 +0100, Kay Sievers wrote:
>> On Tue, Dec 16, 2008 at 21:46,  <devzero@web.de> wrote:
>> >> On Tue, Dec 16, 2008 at 20:37, Roland <devzero@web.de> wrote:
>> >> > i have come across a weird autocomplete issue i assume it is related 
>> >> > to
>> >> > btrfs.
>> >> >
>> >> > let`s have some dirs:
>> >> >
>> >> > /non-btrfs-mount
>> >> >   ./linux
>> >> >   ./testdir
>> >> >
>> >> > /brtfs-mount
>> >> >   ./linux
>> >> >   ./testdir
>> >> >
>> >> > now, if i do "cd t<tab>" in /non-btrfs-mount, "t" autocompletes to 
>> >> > "testdir"
>> >> > same for l<tab>inux - bash autocompletes as expected.
>> >> >
>> >> > now, the weird thing is, that on /btrfs-mount this behaves 
>> >> > different.
>> >> >
>> >> > autocompletion for testdir works, but not for linux dir. weird.
>> >> >
>> >> > can someone reproduce this ?
>> >>
>> >> Open another shell, find the bash process pid of the first shell with:
>> >>   ps afx
>> >> and do:
>> >>   strace -p <pid>
>> >> Go back to the first shell, hit <tab>, and the trace should show
>> >> what's going on. You see a significant difference there?
>> >
>> >
>> > ok, here we go (i hope i did not cut important parts).
>> > i don`t see the real issue, but i did another interesting finding - see 
>> > below
>> >
>> >
>> > bad (cd l<tab>):
>> >
>> > open(".", O_RDONLY|O_NONBLOCK|O_LARGEFILE|O_DIRECTORY|O_CLOEXEC) = 3
>> > fstat64(3, {st_dev=makedev(0, 19), st_ino=256, st_mode=S_IFDIR|0555, 
>> > st_nlink=1, st_uid=0, st_gid=0, st_blksize=4096, st_blocks=8, 
>> > st_size=18, st_atime=2008/12/16-21:32:38, st_mtime=2008/12/16-21:32:37, 
>> > st_ctime=2008/12/16-21:32:37}) = 0
>> > getdents64(3, {{d_ino=256, d_off=2, d_type=DT_DIR, d_reclen=24, 
>> > d_name="."} {d_ino=256, d_off=2, d_type=DT_DIR, d_reclen=24, 
>> > d_name=".."} {d_ino=257, d_off=3, d_type=DT_DIR, d_reclen=24, 
>> > d_name="test"} {d_ino=258, d_off=9223372036854775807, d_type=DT_DIR, 
>> > d_reclen=32, d_name="linux"}}, 4096) = 104
>> > _llseek(3, 3, [3], SEEK_SET)            = 0
>> > getdents64(3, {{d_ino=258, d_off=9223372036854775807, d_type=DT_DIR, 
>> > d_reclen=32, d_name="linux"}}, 4096) = 32
>>
>> On Tue, Dec 16, 2008 at 22:26,  <devzero@web.de> wrote:
>> > i assume it has something to do with the large value for d_off of the 
>> > last dirent ?
>>
>> Looks like, 9223372036854775807 is just LLONG_MAX.
>
> I can not reproduce that (on openSUSE 11.1). I also don't see
> the _llseek() calls.

weird. no btrfs issue then !?

>
> open(".", O_RDONLY|O_NONBLOCK|O_DIRECTORY|O_CLOEXEC) = 3
> fstat(3, {st_dev=makedev(0, 18), ...
> getdents64(3, {
>  {d_ino=260, d_off=2, d_type=DT_DIR, d_reclen=24, d_name="."}
>  {d_ino=256, d_off=2, d_type=DT_DIR, d_reclen=24, d_name=".."}
>  {d_ino=261, d_off=3, d_type=DT_REG, d_reclen=24, d_name="a"}
>  {d_ino=262, d_off=4, d_type=DT_REG, d_reclen=24, d_name="b"}
>  {d_ino=263, d_off=5, d_type=DT_REG, d_reclen=24, d_name="c"}
>  {d_ino=264, d_off=6, d_type=DT_DIR, d_reclen=24, d_name="test"}
>  {d_ino=265, d_off=9223372036854775807, d_type=DT_DIR, d_reclen=32, 
> d_name="linux"}
> }, 4096) = 176
> getdents64(3, {}, 4096)                 = 0
> close(3)
>
> This is with today's git kernel and today's standalone btrfs unstable.
>
> You are using the distro kernel and compile the standalone btrfs module?

yes.
to be honest, i`m slightly newer than 11.1 (did zypper dup to latest factory 
some days ago)

linux:~ # bash -version
GNU bash, version 3.2.39(1)-release (i586-suse-linux-gnu)
Copyright (C) 2007 Free Software Foundation, Inc.


roland