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Hello all,
system/mountfs gives us some serious trouble if the system configuration gets
more complex.
1. /usr or /home could be mounted via NFS. To solve arising problems, we could
simply add "use = virtual/net" to the corresponding entries. However, this
makes (a) the boot process pretty slow for machines that have /usr or /home
on a local hard disk and gives us some problems if the DHCP client is
in /usr/sbin and /usr is on a local disk. (If /usr is on NFS, for example,
the administrator will quite naturally place the DHCP client in /sbin, so no
problem here.)
2. system/mountfs uses grep, sed and sort, which may be in /usr/bin. This is
not very likely, however, we should get rid of these calls. I'd change the
mount call in e.g. system/mountfs/essential to a simple "mount ${mp}
2>/dev/null". Mount will then silently fail if the mount point isn't
in /etc/fstab, which should not be a problem. And it won't take more time,
except if the mount point is - yes! - to be mounted via NFS. What brings us
back to 1.
3. It is possible to replace the grep calls with a bash construct (i.e. via
case), but I don't know whether this would be valid with dash, too. Could
someone check this out, please?
Generally spoken, the simplest solution would be that the user changes the
ifiles, but that's bad.
Another solution would be to write a little config tool that tweaks the files
(it could do some other tweaking that is related to dependency stuff as
well), but I fear the ifiles distro would become crowded with obscure scripts
that confuse the user.
We could devide the ifile a bit more, allowing the user to add something like
mountfs/net/FOO and mountfs/local/FOO, along with the dependencies. Other
ifiles could then explicitly depend on virtual/mount/usr or something like
that. However, it makes things really complex.
I know that all of these solutions that came into my mind are far from beeing
perfect, and I hope somebody will come up with a better way of handling this.
Eric
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