Re: lokking for portable way to determine the size of harddisks
On Thursday 08 March 2001 00:21, Marcus Brinkmann wrote:
> On Wed, Mar 07, 2001 at 08:38:54PM +0100, Thomas Lange wrote:
> > I want to determine the size of the local harddisks in a shell. It
> > must be portable so it runs on all hardware. First is used sfdisk,
> > but it's only available on i386. Now I'm using /proc/partitions on a
> > 2.2 kernel:
>
> Using the proc filesystem only works on Linux[1]. The only really portable
> approach is to use statfs(), and that only works for a mounted filesystems,
> which should be sufficient if you are not doing really system specific
> stuff.
statfs() isn't entirely accurate when you have the ability to resize devices
and file systems. If you enlarge the space for a LV in LVM and have not yet
enlarged the FS to match (or if you have reduced the size of the FS but not
reduced the size of the LV) then the results won't be what you want.
Also if you have spare unpartitioned space in reserve for future use then
stating the file systems won't work.
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