On Wed, May 28, 2008 at 5:55 PM, Prasad Joshi <prasadjoshi124@xxxxxxxxx> wrote: > Yes, I read the code > > On Wed, May 28, 2008 at 5:44 PM, Manish Katiyar <mkatiyar@xxxxxxxxx> wrote: >> >> On Wed, May 28, 2008 at 5:43 PM, Manish Katiyar <mkatiyar@xxxxxxxxx> >> wrote: >> > 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) 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 How does this come to 2 then ? 11 40700 (2) 0 0 12288 27-May-2008 20:02 lost+found Since it is a directory, the link count should be minimum 2. > 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 <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 >> > *********************************************** >> > >> >> >> >> -- >> 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 *********************************************** -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ
