Thanks a lot for all the replies.
I am able to use the debugfs. But, I am not able to understand the
information displayed by ls -l command in the debugfs env
Here, is a sample output
This is the current directory structure (file system is mounted at /mnt)
/mnt/
|--------------- dir
| |----------------- 1
|--------------- lost+found
|--------------- test
|--------------- test1
|--------------- test2
test1 and test2 are hard links to file test (there is no data in the file)
HERE IS THE OUTPUT
debugfs: ls -l
2 40755 (2) 0 0 1024 27-May-2008 20:03 .
2 40755 (2) 0 0 1024 27-May-2008 20:03 ..
11 40700 (2) 0 0 12288 27-May-2008 20:02 lost+found
12 100644 (1) 0 0 1037 27-May-2008 20:05 test
13 40755 (2) 0 0 2048 27-May-2008 20:08 dir
12 100644 (1) 0 0 1037 27-May-2008 20:05 test1
12 100644 (1) 0 0 1037 27-May-2008 20:05 test2
debugfs: ls -l dir
13 40755 (2) 0 0 2048 27-May-2008 20:08 .
2 40755 (2) 0 0 1024 27-May-2008 20:03 ..
14 40755 (2) 0 0 1024 28-May-2008 15:48 1
0 0 (0) 0 0 0
debugfs: ls -l dir/1
14 40755 (2) 0 0 1024 28-May-2008 15:48 .
13 40755 (2) 0 0 2048 27-May-2008 20:08 ..
debugfs: mkdir dir/2
debugfs: ls -l
2 40755 (2) 0 0 1024 27-May-2008 20:03 .
2 40755 (2) 0 0 1024 27-May-2008 20:03 ..
11 40700 (2) 0 0 12288 27-May-2008 20:02 lost+found
12 100644 (1) 0 0 1037 27-May-2008 20:05 test
13 40755 (2) 0 0 2048 27-May-2008 20:08 dir
12 100644 (1) 0 0 1037 27-May-2008 20:05 test1
12 100644 (1) 0 0 1037 27-May-2008 20:05 test2
debugfs: ls -l dir
13 40755 (2) 0 0 2048 27-May-2008 20:08 .
2 40755 (2) 0 0 1024 27-May-2008 20:03 ..
14 40755 (2) 0 0 1024 28-May-2008 15:48 1
15 40755 (2) 0 0 1024 28-May-2008 16:51 2
0 0 (0) 0 0 0
Can any one please tell me what these collumns represent?
Thanks and Regards,
Prasad.
On Wed, May 28, 2008 at 8:00 AM, Peter Teoh <[EMAIL PROTECTED]> wrote:
> On Wed, May 28, 2008 at 12:17 AM, Frédéric Weisbecker
> <[EMAIL PROTECTED]> wrote:
> > Hi!
> >
> > Here is a small tutorial:
> >
> http://docs.blackfin.uclinux.org/doku.php?id=file_systems#file_system_exampledebugfs
>
> Yes, that is the kernel-based debugfs, and u used it via the following
> manner (not mentioned in the page, but widely available in Internet):
>
> Method 1:
>
> put the following line in /etc/fstab for automatic moutning at bootup:
>
> none /sys/kernel/debug debugfs
> defaults 0 0
>
>
> Method 2:
>
> Issue:
>
> mount -t debugfs none /sys/kernel/debug
>
> at command line level.
>
> BUT....in my Fedora FC7 distros, at the commandline level there is a
> "debugfs" command (man debugfs):
>
> DEBUGFS(8)
> DEBUGFS(8)
>
> NAME
> debugfs - ext2/ext3 file system debugger
>
> SYNOPSIS
> debugfs [ -Vwci ] [ -b blocksize ] [ -s superblock ] [ -f cmd_file ]
> [
> -R request ] [ -d data_source_device ] [ device ]
>
> DESCRIPTION
> The debugfs program is an interactive file system debugger. It can
> be
> used to examine and change the state of an ext2 file system.
> device is the special file corresponding to the device containing
> the
> ext2 file system (e.g /dev/hdXX).
>
> OPTIONS
> -w Specifies that the file system should be opened in
> read-write
> mode. Without this option, the file system is opened in
> read-
> only mode.
>
> .........
>
> Very confusing.....but I think this is not what u want....it is a tool
> as part of the e2fsprogs package (e2fsprogs.sourceforge.net, I think).
>
>
> > If you need more help to use it, don't hesitate to ask!
> > As you will see there are two ways to use it:
> >
> > _ By creating a file which exports or import a single variable. It's
> simple
> > but asynchronous (you or the user-process needs to check periodically if
> the
> > value has changed.
> > _ By implementing the common file operations. But it stays simple and
> it's
> > synchronous.
> >
> > Regards,
> > Frédéric...
> >
> >
> >
> >
> > 2008/5/27 Prasad Joshi <[EMAIL PROTECTED]>:
> >>
> >> Hi All,
> >>
> >> I have an assignment and I am supposed to use debugfs for the same.
> >> Can anyone please help me? or Point me to a link which tells how to use
> >> debug fs?
> >>
> >> Thanks and Regards,
> >> Prasad
> >
> >
>
>
>
> --
> Regards,
> Peter Teoh
>
