Yes, I read the code On Wed, May 28, 2008 at 5:44 PM, Manish Katiyar <[EMAIL PROTECTED]> wrote:
> On Wed, May 28, 2008 at 5:43 PM, Manish Katiyar <[EMAIL PROTECTED]> > wrote: > > On Wed, May 28, 2008 at 5:06 PM, Prasad Joshi <[EMAIL PROTECTED]> > wrote: > >> 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? > > > > It appears you are using debugfs from e2fsprogs. The columns seem to be > > > > 1) inode number > > 2) permissons/mode, > > 3) From the code it is "dirent->name_len >> 8", but my guess is it is > > number of links. > > 4) uid > > 5) gid > 6) There is size too :-) > > 6) datetime string > > 7) file name. > > > > > > Hope that helps. > Yes correct, I also went through the code of e2fsprogs. File for ls code is debugfs/ls.c 1. Inode Number 2. Inode Mode. 3. dirent->name_len >> 8 it is lenght in bytes 4. UID 5. GID 6. Date 7. File Name Thanks a lot for your reply. --Prasad. > > > > > >> > >> 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 > >> > >> > > > > > > > > -- > > Thanks & Regards, > > ******************************************** > > Manish Katiyar ( http://mkatiyar.googlepages.com ) > > 3rd Floor, Fair Winds Block > > EGL Software Park > > Off Intermediate Ring Road > > Bangalore 560071, India > > *********************************************** > > > > > > -- > Thanks & Regards, > ******************************************** > Manish Katiyar ( http://mkatiyar.googlepages.com ) > 3rd Floor, Fair Winds Block > EGL Software Park > Off Intermediate Ring Road > Bangalore 560071, India > *********************************************** >
