Re: how to map "/dev/root" to "/proc/partitions" entry in user prog?

Denis Vlasenko (vda@port.imtp.ilyichevsk.odessa.ua)
Wed, 15 May 2002 13:39:15 -0200


On 14 May 2002 19:26, Miquel van Smoorenburg wrote:
> Jeff Meininger <jeffm@boxybutgood.com> wrote:
> >How can I reliably map /dev/root to the corresponding entry in
> >/proc/partitions?
>
> The first two lines in /proc/partitions are major/minor of the
> device. Simply stat("/", &st) and use st.st_dev (and the major/minor
> macros in glibc)

Try to do it on NFS root and it will get confused.

Also it gets confused on:

# mount -o remount,ro /
mount: directory to mount not in host:dir format

Summary: /dev/root is nifty but has some rough edges.

--
vda
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