Ubuntu
sysvinit package

  1. Bug #29187
  2. Comment #1

Comment 1 for bug 29187

Revision history for this message
Chris Moore (dooglus) wrote : Re: /etc/init.d/umountroot doesn't, resulting in possible data loss

Could somebody look at this bug please? It's quite important, and results in my root filesystem never being remounted readonly before a reboot.

To reproduce it, try this:

1. try remounting the root filesystem like /etc/init.d/umountroot does it when you shut down. it can't, because it's busy,but at least it finds the first mount point:

  $ sudo mount -n -o remount,ro /
  mount: / is busy

2. add a "bind" mount of the root filesystem to /etc/fstab:

  $ mkdir /tmp/root
  $ sudo bash -c "echo / /tmp/root none bind 0 0 >> /etc/fstab"

3. repeat step 1. this time mount doesn't find the correct mount point, so even if the filesystem wasn't busy, the command would still fail when you shut down:

  $ sudo mount -n -o remount,ro /
  mount: /tmp/root not mounted already, or bad option