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Eric MSP Veith escribió:
> 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.
There's no problem. grep will be available in /, and we avoid unmounting
/usr until we don't need tools in it.
> 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.
It's not an option.
> 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.
Not complex, but not practical either, because the user needs to do that
manually.
> 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
I've got an idea, maybe i could fix this easily...
I've been thinking about this problem since i started to tweak mountfs,
I will try to fix it for 0.1.0 release.
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