On 25-Mar-2003 Christian Rosentreter wrote:
>
> Hello,
>
> I've a small problem, which mades me crazy... :\
>
> I'm trying to rename() a swapfile to real destination file (atomic
> update).
> It works on differnt environments very well. Sadly not on my ISP-server
> I've added an "chmod($swapfile,0777)", but this has not solve the
> problem.
> The directories have all FULL access (read, write, etc.). The
> destiniation file
> too. I don't want 2 use the copy/unlink solution.... Do anyone have an
> idea?
>
> --- 8< ---
>
> if ( $file = fopen($swapfile,"w") )
> {
> fwrite($file,$out);
> fclose($file);
> chmod($swapfile, 0777);
>
> /* this fails with "Permission denied" */
> rename($swapfile,$filename);
>
> /* ... but this works */
> copy($swapfile,$filename);
> unlink($swapfile);
> }
>
> --- 8< ----
>
On *nix, rename will fail if source and destination are different file
systems.
To test this :
copy($swapfile,$filename);
clearstatcache();
$src=stat($swapfile);
$dst=stat($filename);
printf('Source: %d, Dest: %d %s filesystem\n',
$src[0], $dst, ($src[0] == $dst[0] ? 'same' : 'different'));
>
> Thanks 4 help...
> --
> christian rosentreter
>
>
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