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Full Discussion: help with data type sizes
Top Forums Programming help with data type sizes Post 302488048 by omega666 on Friday 14th of January 2011 05:09:32 PM
Old 01-14-2011
still not sure if i understand, say i do this
a=6; b=7;
print (&a-&b)
i would get 1
but if i do
c=&a; d=&b;
print(c-d)
i would get 4

why is this?
 

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DUMPE2FS(8)						      System Manager's Manual						       DUMPE2FS(8)

NAME
dumpe2fs - dump ext2/ext3/ext4 filesystem information SYNOPSIS
dumpe2fs [ -bfhixV ] [ -o superblock=superblock ] [ -o blocksize=blocksize ] device DESCRIPTION
dumpe2fs prints the super block and blocks group information for the filesystem present on device. Note: When used with a mounted filesystem, the printed information may be old or inconsistent. OPTIONS
-b print the blocks which are reserved as bad in the filesystem. -o superblock=superblock use the block superblock when examining the filesystem. This option is not usually needed except by a filesystem wizard who is examining the remains of a very badly corrupted filesystem. -o blocksize=blocksize use blocks of blocksize bytes when examining the filesystem. This option is not usually needed except by a filesystem wizard who is examining the remains of a very badly corrupted filesystem. -f force dumpe2fs to display a filesystem even though it may have some filesystem feature flags which dumpe2fs may not understand (and which can cause some of dumpe2fs's display to be suspect). -h only display the superblock information and not any of the block group descriptor detail information. -i display the filesystem data from an image file created by e2image, using device as the pathname to the image file. -x print the detailed group information block numbers in hexadecimal format -V print the version number of dumpe2fs and exit. BUGS
You need to know the physical filesystem structure to understand the output. AUTHOR
dumpe2fs was written by Remy Card <Remy.Card@linux.org>. It is currently being maintained by Theodore Ts'o <tytso@alum.mit.edu>. AVAILABILITY
dumpe2fs is part of the e2fsprogs package and is available from http://e2fsprogs.sourceforge.net. SEE ALSO
e2fsck(8), mke2fs(8), tune2fs(8). ext4(5) E2fsprogs version 1.42.9 December 2013 DUMPE2FS(8)
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