11-08-2018
Does your ksh version understand the (( ... )) "Arithmetic Expansion"?
Did you check for the istat command?
Did you assess using ls -l's size field (one inode access) against counting every single byte in a file?
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ISTAT(1) General Commands Manual ISTAT(1)
NAME
istat - Display details of a meta-data structure (i.e. inode)
SYNOPSIS
istat [-B num ] [-f fstype ] [-i imgtype] [-o imgoffset] [-b dev_sector_size] [-vV] [-z zone ] [-s seconds ] image [images] inode
DESCRIPTION
istat displays the uid, gid, mode, size, link number, modified , accessed, changed times, and all the disk units a structure has allocated.
The options are as follows:
-B num Display the addresses of num disk units. Useful when the inode is unallocated with size 0, but still has block pointers.
-f fstype
Specify the file system type. Use '-f list' to list the supported file system types. If not given, autodetection methods are used.
-s seconds
The time skew of the original system in seconds. For example, if the original system was 100 seconds slow, this value would be
-100.
-i imgtype
Identify the type of image file, such as raw or split. Use '-i list' to list the supported types. If not given, autodetection
methods are used.
-o imgoffset
The sector offset where the file system starts in the image.
-b dev_sector_size
The size, in bytes, of the underlying device sectors. If not given, the value in the image format is used (if it exists) or
512-bytes is assumed.
-v Verbose output of debugging statements to stderr
-V Display version
-z zone
An ASCII string of the original system's time zone. For example, EST5EDT or GMT. These strings are defined by the operating system
and may vary. NOTE: This has changed since TCTUTILs.
image [images]
One (or more if split) disk or partition images whose format is given with '-i'.
inode Meta-data number to display stats on
AUTHOR
Brian Carrier <carrier at sleuthkit dot org>
Send documentation updates to <doc-updates at sleuthkit dot org>
ISTAT(1)