Messages in this thread | | | Date | Wed, 25 Oct 2000 13:07:08 -0600 | From | Erik Andersen <> | Subject | Re: Patch for /proc/mounts problems on 2.2.x |
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On Wed Oct 25, 2000 at 08:16:07PM +0200, Andries Brouwer wrote: > > Your web page misses the loop device info. > > Another point of difference is the name of the root device. > /proc/mounts has /dev/root, while /etc/mtab usually has > whatever was listed for / in /etc/fstab. > > For some applications it is important to get the name of the > root device right. (I wrote a mount_guess_rootdev.c found in > the latest util-linux (2.10p), but not yet used because the > information in /etc/fstab is normally better.)
I did a similar find_real_root_device_name() in busybox some time back. Basically, do a stat("/", &rootstat) then walk /dev stat'ing each file and if (statbuf.st_rdev == rootstat.st_rdev) then you have a match. Works fine.
> > But before doing more extensive things, we might wait a bit and see > what happens with 2.4. The new mount stuff allows people to build > immensely complicated mount structures. No doubt this has security > implications, and probably security conscious stuff will have to be > partially rewritten. I could imagine that we'll discover the need > for new system calls, maybe mtable(), or mstat() to find out about > the mount status of a file or directory. No design exists as yet.
I wrote a /dev/mounts device driver some time ago. ftp://oss.lineo.com/busybox/kernel-patches/devps.patch.9_25_2000
-Erik
-- Erik B. Andersen email: andersee@debian.org --This message was written using 73% post-consumer electrons-- - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org Please read the FAQ at http://www.tux.org/lkml/
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