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debugfs create special files
mke2fs -Fq -b 1024 test.img 512
Exit status is 0
debugfs -R ''stat foo'' -w test.img
Inode: 12 Type: symlink Mode: 0777 Flags: 0x0
Generation: 0 Version: 0x00000000:00000000
User: 0 Group: 0 Project: 0 Size: 3
File ACL: 0
Links: 1 Blockcount: 0
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
atime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
mtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
crtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
Size of extra inode fields: 32
Fast link dest: "bar"
Exit status is 0
debugfs -R ''stat foo2'' -w test.img
Inode: 13 Type: symlink Mode: 0777 Flags: 0x0
Generation: 0 Version: 0x00000000:00000000
User: 0 Group: 0 Project: 0 Size: 80
File ACL: 0
Links: 1 Blockcount: 2
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
atime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
mtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
crtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
Size of extra inode fields: 32
BLOCKS:
(0):36
TOTAL: 1
Exit status is 0
debugfs -R ''block_dump 28'' -w test.img
0000 0000 0000 0004 0000 0000 0000 0000 0000 ................
0020 0000 0000 0000 0000 0000 0000 0000 0000 ................
*
Exit status is 0
debugfs -R ''stat pipe'' -w test.img
Inode: 14 Type: FIFO Mode: 0000 Flags: 0x0
Generation: 0 Version: 0x00000000:00000000
User: 0 Group: 0 Project: 0 Size: 0
File ACL: 0
Links: 1 Blockcount: 0
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
atime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
mtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
crtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
Size of extra inode fields: 32
BLOCKS:
Exit status is 0
debugfs -R ''stat sda'' -w test.img
Inode: 15 Type: block special Mode: 0000 Flags: 0x0
Generation: 0 Version: 0x00000000:00000000
User: 0 Group: 0 Project: 0 Size: 0
File ACL: 0
Links: 1 Blockcount: 0
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
atime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
mtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
crtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
Size of extra inode fields: 32
Device major/minor number: 08:00 (hex 08:00)
Exit status is 0
debugfs -R ''stat null'' -w test.img
Inode: 16 Type: character special Mode: 0000 Flags: 0x0
Generation: 0 Version: 0x00000000:00000000
User: 0 Group: 0 Project: 0 Size: 0
File ACL: 0
Links: 1 Blockcount: 0
Fragment: Address: 0 Number: 0 Size: 0
ctime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
atime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
mtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
crtime: 0x50f560e0:00000000 -- Tue Jan 15 14:00:00 2013
Size of extra inode fields: 32
Device major/minor number: 01:03 (hex 01:03)
Exit status is 0
e2fsck -yf -N test_filesys
Pass 1: Checking inodes, blocks, and sizes
Pass 2: Checking directory structure
Pass 3: Checking directory connectivity
Pass 4: Checking reference counts
Pass 5: Checking group summary information
test_filesys: 16/64 files (0.0% non-contiguous), 37/512 blocks
Exit status is 0
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