On Wed, May 28, 2008 at 5:06 PM, Prasad Joshi <prasadjoshi124@xxxxxxxxx> 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) datetime string 7) file name. Hope that helps. > > Thanks and Regards, > Prasad. > > On Wed, May 28, 2008 at 8:00 AM, Peter Teoh <htmldeveloper@xxxxxxxxx> wrote: >> >> On Wed, May 28, 2008 at 12:17 AM, Frédéric Weisbecker >> <f.weisbecker@xxxxxxxxx> 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 <prasadjoshi124@xxxxxxxxx>: >> >> >> >> 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 *********************************************** -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
