Arch Linux

brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

[req] rlocate

About rlocate

        rlocate for Linux (2.6 Kernel)

        Released January 27, 2005
        Copyright (c) 2004,2005 Rasto Levrinc
        Based on slocate by Kevin Lindsay

rlocate is an implementation of the ``locate'' command that is always up-to-date. The database that the original locate uses is usually updated only once a day, so newer files cannot be located right away. The behavior of rlocate is the same as slocate, but it also maintains a diff database that gets updated whenever a new file is created. This is accomplished with rlocate kernel module and daemon. The rlocate kernel module can be compiled only with Linux 2.6 kernels.

http://sourceforge.net/docman/display_d … _id=129555

i used to use this on my gentoo, it worked great, with no overhead. it's be cool to have it on arch, since imho it only has advantages when compared to slocate...

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what goes up must come down

test1000

Member

Registered: 2005-04-03

Posts: 834

Re: [req] rlocate

the cool thing about this is that one could effectively use grep on those files and have the same functionality that beagle provides only much simpler & better

from a coders perspective anyway... Imagine the cool scripts one could make in bash with this

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KISS = "It can scarcely be denied that the supreme goal of all theory is to make the irreducible basic elements as simple and as few as possible without having to surrender the adequate representation of a single datum of experience." - Albert Einstein

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

Working on it now. The build is not exactly package-friendly, so some patching is required.

Watch this space.

brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

Working on it now. The build is not exactly package-friendly, so some patching is required.

Watch this space.

cool ! eagerly waiting then... thanks for such reactivity, tomk !

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what goes up must come down

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

Here you go - in the AUR now, here and here.

Any problems, comments, etc can be added to the rlocate AUR page.

Gullible Jones

Member

Registered: 2004-12-29

Posts: 4,863

Re: [req] rlocate

Interesting. I do wonder what kind of effect it has on write performance though.

patroclo7

Member

From: Bassano del Grappa, ITALY

Registered: 2006-01-11

Posts: 915

Re: [req] rlocate

You could look at mlocate as an alternative: a simpler way to meet similar needs.

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brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

works great here, many many thanks tomk !!

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tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

Don't mention it.

I see it's got 5 votes already - if that pace keeps up, we could have this in community in about a week.

brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

cool then ! 8)
a good and convenient rlocate tool is the KDE I/O Slave.
very handy !

*edit*
oh, motyR already worked on kio-locate

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brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

just one last thing : it only seems to work for root, though my user is part of the rlocate group... any suggestions ?

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tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

Did you log out and in again, after adding yourself to the group?

brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

i didn't. my mistake. that's one more thing i learnt tonight. once again, thank you tomk !

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what goes up must come down

brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

is it incompatible with kernel26-beyond ? i get

# modprobe rlocate
FATAL: Error inserting rlocate (/lib/modules/2.6.16-beyond/misc/rlocate.ko): Invalid module format

here's my modified PKGBUILD :

# Contributor: Tom K <tomk>

pkgname=rlocate-mod
pkgver=0.5.1
pkgrel=1
pkgdesc="The rlocate kernel module, for Arch kernel26beyond"
depends=('glibc' 'kernel26beyond')
conflicts=('slocate')
source=(http://dl.sourceforge.net/sourceforge/rlocate/rlocate-$pkgver.tar.gz)
md5sums=('618dc98cd9c13468e8b8e1ca5f0eabbc')
url="http://rlocate.sourceforge.net/"
license="GPL"
install=$pkgname.install

_kernver=2.6.16-beyond

build() {
  cd $startdir/src/rlocate-$pkgver
  ./configure --with-kernel=/lib/modules/$_kernver/build 
  --with-moduledir=/lib/modules/$_kernver/misc
  cd src/rlocate-module
  make || return 1
  install -Dm755 rlocate.ko $startdir/pkg/lib/modules/$_kernver/misc/rlocate.ko
  sed -i -e "s/KERNEL_VERSION=.*/KERNEL_VERSION=${_kernver}/g" $startdir/$pkgname.install
}

what am i doing wrong ?

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tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

Works fine here with beyond.

Did you download the tarball from the AUR, or just the PKGBUILD? There's an install script in the tarball, which is required.

For a quick fix, try

depmod -a

as root.

brazzmonkey

Member

From: between keyboard and chair

Registered: 2006-03-16

Posts: 818

Re: [req] rlocate

i downloaded the tarball, sorry i didn't notice the install script...
it works now.
thanks again tomk ! i won't bother you anymore on that one...

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Purch

Member

From: Finland

Registered: 2006-02-23

Posts: 229

Re: [req] rlocate

I cannot get rlocate working. I used aurbuild to make rlocate and rlocate-mod packages and install them. I did try also downloading tarballs, makepkg and pacman -A. I had to change rlocate-mod PKGBUILD file a bit:
_kernver=2.6.16-ARCH --> _kernver=2.6.17-ARCH

$ sudo modprobe rlocate
FATAL: Error inserting rlocate (/lib/modules/2.6.17-ARCH/misc/rlocate.ko): Invalid argument

I tested sudo depmod -a and it does not report anything and wont help to sudo modprobe rlocate

Have I missed something?

$ pQ kernel26
kernel26 2.6.17.11-1

For debugging; strace prints following: rlocate_error.txt

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

You probably have the capability module already loaded. Just unload it:

modprobe -r capability

and try again.

Purch

Member

From: Finland

Registered: 2006-02-23

Posts: 229

Re: [req] rlocate

After upgrading to 2.6.18-4 kernel rlocate-mod crashes to the configure check list. It worked with 2.6.17 kernel.
Need help with kernel version 0.0.0

checking for directory with kernel source... /lib/modules/2.6.18-ARCH/build
checking for kernel version... 0.0.0
configure: error: *** rlocate needs kernel 2.6 to work
make: *** No targets specified and no makefile found.  Stop.
==> ERROR: Build Failed.  Aborting...

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

There's a new release out. Change pkgver to 0.5.3 and you'll be OK.

I'll update it in the AUR shortly.

Purch

Member

From: Finland

Registered: 2006-02-23

Posts: 229

Re: [req] rlocate

thanks

cromo

Member

From: Czestochowa, Poland

Registered: 2006-09-20

Posts: 87

Re: [req] rlocate

When run as a user:
cromo@kromka:~$ locate
locate: fatal error: Could not find user database '/var/lib/rlocate/rlocate.db':  Permission denied

Works fine when run as root.

tomk

Forum Fellow

From: Ireland

Registered: 2004-07-21

Posts: 9,839

Re: [req] rlocate

>>>
>>> To use rlocate, add your username to the rlocate group, and add
>>> rlocate to the MODULES and DAEMONS arrays in /etc/rc.conf.
>>>

cromo

Member

From: Czestochowa, Poland

Registered: 2006-09-20

Posts: 87

Re: [req] rlocate

Mhmm this is weird, I thought it is no longer needed to add the user to rlocate group, as stated in comments @ PKGBUILD page. Thanks anyway.