du bug, wrong sizes reported.

Earnie Boyd earnie_boyd@hotmail.com
Sat Jan 24 15:34:00 GMT 1998


>From: "Bruce N. Hunsaker" <bruceh@ns1.ieighty.net>
>Subject: du bug, wrong sizes reported.
>To: gnu-win32@cygnus.com
>Date: Tue, 20 Jan 1998 11:59:01 -0700 (MST)
>
>I have searched the archives but haven't seen this one
>reported yet (but I might have missed it).
>
>du reports sizes in 2k blocks.  It should report sizes using
>a block size of 1k.

No.  The default block size should be 512 bytes.

>
>Example:
>	$ ls -l du.exe
>	-rwxr-x-r-x   1 all    Everyone   22016 May 08 1997 du.exe
>	$ du du.exe
>	11  du.exe
>
>The correct output of du should be:
>	22  du.exe

This should be 44  du.exe

>
>Looking at the source I changed 2 lines of code to fix this problem.
>Change the line that says:
>	size =ST_NBLOCKS(stat_buf)
>to
>	size =(stat_buf.st_size + 511) / 512;
>I wonder what's wrong the the ST_NBLOCKS macro?
>Second change:
>	convert_blocks( size, output_size == kilobytes)
>to
>	convert_blocks( size, output_size)
>This looks like a bug in the code, and might be fixed if there is a
>newer version of GNU fileutils.
>
>Also, performance is quite bad.  It is better with the patched
>cygwin.dll in coolview, but du should still be much faster. (See
>similar problems with find and ls...)
>
>
>---
>Bruce Hunsaker - bruceh@ieighty.net


The -h switch works though without source modification.  The -k switch 
produces the same results as the command with no switch.

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