varlock and varrun

[Christoph Pleger]

Hello,

On Tue, 17 Apr 2007 09:42:47 +0200
Thomas Kaiser <ubuntu at kaiser-linux.li> wrote:


> >> On my Dapper system:
> >>
> >> $ grep -l varrun /etc/init.d/*
> >> /etc/init.d/mtab
> >> $ ls -l /etc/rc*.d/*mtab
> >> lrwxrwxrwx 1 root root 14 2007-02-21 22:24 /etc/rcS.d/S22mtab ->
> >> ../init.d/mtab
> >>
> >> I.e. the script mtab is started before mountall.sh.
> >>     
> >
> > Yes, and that I see as the problem where I wonder why it does not
> > occur in a CD-installed Ubuntu system:
> >
> > /var/lock and /var/run are mounted in S01mountkernfs.sh (S22mtab
> > only creates the entries in /etc/mtab, but does not mount anything,
> > see "man mount" for the meaning of paramater -f), but /var is
> > mounted in S35mountall.sh. So, directories /var/lock and /var/run
> > are not present at the time when they are tried to be used as
> > mountpoints. And even if they existed in the root filesystem /, they
> > would be overwritten by mounting /var later.
> >
> > So, I still have no explanation how /var/lock and /var/run can be
> > mounted successfully in a CD-installed system.

> When I check the mounted filesystems on my machine I don't see that
> /var  is mounted:
> thomas at LAPI01:~$ mount
> /dev/sda2 on / type ext3 (rw,errors=remount-ro)
> proc on /proc type proc (rw,noexec,nosuid,nodev)
> /sys on /sys type sysfs (rw,noexec,nosuid,nodev)
> varrun on /var/run type tmpfs (rw,noexec,nosuid,nodev,mode=0755)
> varlock on /var/lock type tmpfs (rw,noexec,nosuid,nodev,mode=1777)
> procbususb on /proc/bus/usb type usbfs (rw)
> udev on /dev type tmpfs (rw,mode=0755)
> devshm on /dev/shm type tmpfs (rw)
> devpts on /dev/pts type devpts (rw,gid=5,mode=620)
> /dev/sda1 on /media/sda1 type ntfs (rw,nls=utf8,umask=007,gid=46)
> /dev/sda6 on /home type ext3 (rw,nosuid,nodev)
> binfmt_misc on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
> thomas at LAPI01:~$
> 
> /var/run and /var/lock are directories in the filesystem and they are 
> present when S01mountkernfs.sh is run and can be used as mount point. 
> S01mountkernfs.sh will mount /var/run and /var/lock as tempfs.
> And S35mountall.sh does not mount /var.

I assume that you simply do not have a separate partition for /var, but
that it is on the root partition. But I have separate partitions for it,
on my CD-installed system as well as on my debootstrap-installed system.

Regards
  Christoph