Re: mounting a .iso image? ... missing man page
On 10/09/2013 10:14 pm, Gary Aitken wrote: For some strange reason, my 9.1 system seems to be missing the section 1 man page for tar, although everything else seems to be there. I have an iso9660 image of 9.1 release which I tried to mount to copy the missing file, but that didn't work (can't find the CD I burned...). #mount -t cd9660 -o ro FreeBSD-9.1-RELEASE-amd64-disc1.iso /mnt/tmp mount_cd9660: /hd1/Downloads/FreeBSD/9_1/FreeBSD-9.1-RELEASE-amd64-disc1.iso: Block device required Seems like it must be possible to mount a cd9660 image somehow without burning an actual disc? Gary ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org mdconfig -a -t vnode -f /path/to/file.iso this will create a /dev/md# where # starts at 0 for first one mount it with mount -t cd9660 -o ro /dev/md# /mnt -- Thanks, Dean E. Weimer http://www.dweimer.net/ ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mounting a .iso image? ... missing man page
On Wed, 09 Oct 2013 21:14:22 -0600, Gary Aitken wrote: Seems like it must be possible to mount a cd9660 image somehow without burning an actual disc? Of course. :-) It is possible by using a virtual node connected to the ISO file. Without having tested, according to your example: # mdconfig -u 0 -t vnode -f /hd1/Downloads/FreeBSD/9_1/FreeBSD-9.1-RELEASE-amd64-disc1.iso # mount -o ro -t cd9660 /dev/md0 /mnt/tmp ... do stuff ... # umount /mnt/tmp # mdconfig -u 0 -d An alternative would be to use tar to extract the files from the image, change whatever you want, and use mkisofs afterwards to rebuild the (new) image, in case you want to modify its content. -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mounting a .iso image? ... missing man page
On 10/09/13 21:25, Polytropon wrote: On Wed, 09 Oct 2013 21:14:22 -0600, Gary Aitken wrote: Seems like it must be possible to mount a cd9660 image somehow without burning an actual disc? Of course. :-) I guess knowing it's possible is a start; couldn't figure out where to look to get the magic combination. It is possible by using a virtual node connected to the ISO file. Without having tested, according to your example: # mdconfig -u 0 -t vnode -f /hd1/Downloads/FreeBSD/9_1/FreeBSD-9.1-RELEASE-amd64-disc1.iso for the record, that's: mdconfig -a -t vnode -u 0 -f file # mount -o ro -t cd9660 /dev/md0 /mnt/tmp ... do stuff ... # umount /mnt/tmp # mdconfig -u 0 -d and that one is mdconfig -d -u 0 order appears to be important Thanks again, Gary ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mounting a .iso image? ... missing man page
On Wed, 09 Oct 2013 22:18:41 -0600, Gary Aitken wrote: for the record, that's: mdconfig -a -t vnode -u 0 -f file Correct, I noticed too late that -a was missing. But man mdconfig mentions all parts that are needed. :-) # mount -o ro -t cd9660 /dev/md0 /mnt/tmp ... do stuff ... # umount /mnt/tmp # mdconfig -u 0 -d and that one is mdconfig -d -u 0 order appears to be important The manpage doesn't seem to explicitely mention this, but if I remember correctly, it actually matters, as you said. By the way, the manpage mentions mount -t cd9660 /dev/`mdconfig -f cdimage.iso` /mnt as an interesting construction in the EXAMPLES section. :-) -- Polytropon Magdeburg, Germany Happy FreeBSD user since 4.0 Andra moi ennepe, Mousa, ... ___ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to freebsd-questions-unsubscr...@freebsd.org
Re: mounting a .iso image? ... missing man page
Gary Aitken wrote:
On 10/09/13 21:25, Polytropon wrote:
On Wed, 09 Oct 2013 21:14:22 -0600, Gary Aitken wrote:
Seems like it must be possible to mount a cd9660 image somehow without
burning an actual disc?
Of course. :-)
I guess knowing it's possible is a start;
couldn't figure out where to look to get the magic combination.
It is possible by using a virtual node connected to the
ISO file. Without having tested, according to your example:
# mdconfig -u 0 -t vnode -f
/hd1/Downloads/FreeBSD/9_1/FreeBSD-9.1-RELEASE-amd64-disc1.iso
for the record, that's:
mdconfig -a -t vnode -u 0 -f file
# mount -o ro -t cd9660 /dev/md0 /mnt/tmp
... do stuff ...
# umount /mnt/tmp
# mdconfig -u 0 -d
and that one is
mdconfig -d -u 0
order appears to be important
Thanks again,
Gary
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To avoid having to recall the arguments for mdconfig(8):
#/bin/sh
#start_isofs
#two commands to attach and mount or umount file.iso
#
isofs_stop() {
(umount -f /mnt
mdconfig -d -u $NUM)
}
NUM=3
DEV=/dev/md${NUM}
IMGFS=$1
case $2 in
start)
# first check whether target mount point is in use
if mount | grep -q /mnt; then
printf Exiting: mount point '/mnt' currently unavailable.\n
exit 1
fi
(mdconfig -a -t vnode -f $IMGFS -u $NUM
mount -o ro -t cd9660 $DEV /mnt) ;;
stop)
isofs_stop ;;
*)
if [ $IMGFS = stop ]; then
isofs_stop
else
your_script=$(basename $0)
printf Usage: %s [isofile] start|stop\n $your_script
fi
;;
esac
exit
--
c...@sdf.org
SDF Public Access UNIX System - http://sdf.org
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