Subject: Re: [ast-users] getting the size of a file
--------
> Is there a fast ksh method (builtin, operator, etc.) for getting
> the size of a file in bytes?
>
> I generally use $(wc -c < file) because I think it's more portable than
> parsing 'ls' output,
> but it's expensive just from the fork&exec alone -- maybe even more
> expensive than 'ls'
> if wc is actually *counting* bytes as opposed to getting the size from
> the i-node.
>
> But it would sure be handy if I could use something like $(#<file).
>
> Regards,
> Mario DeFazio
>
The ast wc command doesn't count bytes with wc -c < file. In addition,
you can do
builtin wc
to get the libcmd version.
However, with ksh93, you can get the file size with mechanisms
that are built-in.
function fsize # file
{
command exec 5< $1 5<#((EOF)) # open file and seek to EOF
print -r -- $(5<#) # output file offset
command exec 5<&- #close the file
}
You should be able to use {var} instead of 5 so that the shell would
pick the file descriptor, but unfortunately there are a couple of
bugs that cause this to fail.
These will be fixed in the next release.
David Korn
[EMAIL PROTECTED]
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