I wrote this in -current ML too,
From: Kevin Brunelle [EMAIL PROTECTED]
Date: Fri, 09 Feb 2001 11:10:10 -0500
It's not system call but `od' driver does check if the medium is
writable or not. It returns EACCESS when the mount option is -rw and
the medium is read-only. `od' is drived from
From: Kenny Drobnack [EMAIL PROTECTED]
Date: Fri, 09 Feb 2001 00:03:06 -0500
Is some system call to check the hardware to see if its physically
writable? I figure there is. I want to start hacking at the kernel a
bit, and it seems like something simple (comparitively) would be a good
I am sorry if this hits the list twice. But, I think my school's
mailserver has been silently dropping mail for some time now. -KB
Well,
This is a driver bug. The da driver, which deals with disks, doesn't
check to see if the media is writable or not before allowing r/w
mounts. You could
It's not system call but `od' driver does check if the medium is
writable or not. It returns EACCESS when the mount option is -rw and
the medium is read-only. `od' is drived from `da' so quick hack will
do the trick.
This is all for scsi drives. I may not know everything, but I know most
So it seems that probably all block devices have this bug. I haven't
tried it with an ATA or SCSI hard drive, tape drive, or any flash RAM
type stuff. The problem does occur on standard floppy disks and on my
parallel port zip drives.
If/when I do mess with it, I think I'll stick with
There's this little problem with FreeBSD that has been bugging me a bit
for a while now. There have been a couple times I've tried to mount Zip
disks or floppy drives in FreeBSD, and had the /etc/fstab set up to
mount read/write, and didn't realize that I had write protect turned
on. However, I
In message [EMAIL PROTECTED] Kenny Drobnack writes:
: Is some system call to check the hardware to see if its physically
: writable? I figure there is. I want to start hacking at the kernel a
: bit, and it seems like something simple (comparitively) would be a good
: place to start. Up
In message [EMAIL PROTECTED] Kenny Drobnack writes:
: Up there on my wish list is getting a journaling
: filesystem ported to FreeBSD.
You may wish to check out IBM's JFS port for Linux
(http://oss.software.ibm.com/developerworks/opensource/jfs/) It's released
under the GPL. The nice
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