There's a small gotcha - the filesystem itself has to have been opened:
void *xfs_handle = 0;
size_t hlen = 0;
/* xfs library needs the filesystem to have been opened */
if (path_to_fshandle(mountpoint, &xfs_handle, &hlen) < 0) {
/* error */
exit(4);
}
free(xfs_handle);
On Thu, 2015-04-09 at 13:53 +0100, Mark Hills wrote:
> I am having troubles with elementary file handle functions in libhandle.
>
> A basic open_by_handle is giving "Bad file descriptor".
>
> But I am suspicious of a side effect; using path_to_fshandle earlier in
> the program changes these errors to "Operation not permitted".
>
> Is there a basic mistake in my use of these calls, or a bug/unmaintained
> code?
>
> I am on an XFS filesystem (otherwise the first call fails with
> 'inappropriate ioctl'). The only documentation I can find is the man page;
> no mention about initialising the library, and I wasn't able to find any
> examples.
>
> I'm on Scientific Linux 6.6 (like RedHat 6, kernel 2.6.32-504.1.3), and
> also tried updating to the latest xfsprogs from Git, with the same
> results.
>
> Many thanks
>
--
Roger Willcocks <roger@xxxxxxxxxxxxxxxx>
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