Myron Turner wrote:
Tijnema ! wrote:
On 3/10/07, Németh Zoltán <znemeth@xxxxxxxxxxxxxx> wrote:
2007. 03. 10, szombat keltezéssel 12.42-kor Riyadh S. Alshaeiq ezt
írta:
> Actually if right click on any file or folder on a machine you
will see
that
> there are two values (Size on disk & Size). Files and folders are
stored
on
> the disk in what is called clusters (a group of disk sectors).
Size on
disk
> refers to the amount of cluster allocation a file is taking up,
compared
to
> file size which is an actual byte count.
>
> As I mentioned before what I want is a function for getting the
result
for
> the Size no for Size on Disk
okay then what about this?
Th
I wrote a small perl script which returns the bytes read when a file
is read from the disk and it, too, agrees with the filesize and header
sizes. In Windows, the actual filesize is also returned by filesize
and stat, not the size on disk (filesize uses stat). Also, in the
PHP manual, the fread example uses filesize to set the number of bytes
to read:
||
Here's the perl script:
use strict;
use Fcntl;
sysopen (FH, "index.htm", O_RDONLY);
my $buffer;
my $len = sysread(FH, $buffer, 8192,0);
print $len,"\n";
If you are really anxious about size you can exec out to this script
and get the file size.
--
Sorry the above version of the script was hard-coded for a small test
file. Here's the general version:
# get_len.pl
use strict;
use Fcntl;
sysopen (FH, $ARGV[0], O_RDONLY) or die "\n";
my $buffer;
my $bytes_read = 0;
my $offset;
while($bytes_read = sysread(FH, $buffer, 8192, $offset)) {
$offset+=$bytes_read ;
}
print $offset,"\n";
From an exec() you'd call it with the file name:
perl get_len.pl <filename>
$len = exec("perl get_len.pl $filename");
_____________________
Myron Turner
http://www.room535.org
http://www.bstatzero.org
http://www.mturner.org/XML_PullParser/
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