> +static int is_ssd(const char *file)
> +{
> + char *dev = strrchr(file, '/');
[ ... ]
> + snprintf(path, PATH_MAX, "/sys/block/%s/queue/rotational", dev);
> + fd = open(path, O_RDONLY);
Hmm, this doesn't seem right. The last path component can have nothing
to do with the underlying device name. And /sys/block doesn't have
entries for partition devices.
After some poking around (and hints from Eric), it looks like the thing
to do is stat the file to find that it's a block device and then use
blkid_devno_to_wholedisk(). That parses the link from
/sys/dev/block/$maj:$min to find the containing device.
Then it'll work for partitions and nutty udev vanity symlinks.
- z
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