Re: Mount CD/DVD and playback DVD as normal user
Hi Fred, You were right about adding /cdrom to fbtab. I had added /dev/cd0a, so it didn't work. I'm in the operators group, so a combination of the two means I can now mount cd/dvd and watch dvds in Xine. Thanks everyone for you assistance. Regards, Laurence. On 12 November 2013 23:47, Fred wrote: > On 11/12/13 20:48, Laurence Rochfort wrote: >> >> Thanks Fred, >> >> /cdrom is the mount point, so no I don't think it should be a symlink. >> >> The command is: >> >> $ mount /dev/cd0a /cdrom >> mount_cd9660: /dev/cd0a on /cdrom: Operation not permitted > > > Hi Laurence, > > You are right it should just be a node so not a symlink. > > The issue is with root owning /cdrom - but if you add /cdrom entry to fbtab: > > port:fred ~> tail -2 /etc/fbtab > #/dev/ttyC0 0600/dev/fd0 > /dev/ttyC0 0600/cdrom > > Then the user who logs in can then mount /cdrom > > port:fred ~> mount -tcd9660 /dev/cd0a /cdrom > port:fred ~> mount > /dev/sd0a on / type ffs (local) > /dev/sd0k on /home type ffs (local, nodev, nosuid) > /dev/sd0d on /tmp type ffs (local, nodev, nosuid) > /dev/sd0f on /usr type ffs (local, nodev) > /dev/sd0g on /usr/X11R6 type ffs (local, nodev) > /dev/sd0h on /usr/local type ffs (local, nodev) > /dev/sd0j on /usr/obj type ffs (local, nodev, nosuid) > /dev/sd0i on /usr/src type ffs (local, nodev, nosuid) > /dev/sd0e on /var type ffs (local, nodev, nosuid) > /dev/sd2i on /mnt/usbpen type msdos (local) > /dev/cd0a on /cdrom type cd9660 (local, nodev, nosuid, read-only) > > I had to read mount(8) and fbtab(5) to work it out... > > hth > > Fred
Re: Mount CD/DVD and playback DVD as normal user
Am Mon, 11 Nov 2013 22:08:20 + schrieb Laurence Rochfort : > Hello, > > I'm trying to configure my laptop so that a normal user may mount a > CD/DVD or playback a DVD in Xine. > > So far I've just put an entry in /etc/fbtab. /cdrom permissions look > OK, but the devices themselves less so. > > What are the consequences of putting myself in the operator group? > Where can I find a description of those groups? > > Advice greatly appreciated. > > Cheers, > Laurence. > > drwxr-xr-x 2 root wheel 512 Nov 8 14:29 cdrom > > brw-r- 1 root operator6, 0 Nov 8 14:13 /dev/cd0a > brw-r- 1 root operator6, 2 Nov 8 14:13 /dev/cd0c > brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a > brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c > crw-r- 1 root operator 15, 0 Nov 8 14:13 /dev/rcd0a > crw-r- 1 root operator 15, 2 Nov 8 14:13 /dev/rcd0c > crw-r- 1 root operator 15, 16 Nov 8 14:13 /dev/rcd1a > crw-r- 1 root operator 15, 18 Nov 8 14:13 /dev/rcd1c > > # $OpenBSD: fbtab.head,v 1.2 1999/05/05 06:56:34 deraadt Exp $ > # login(1) reads this file to determine which devices should be > chown'd to # the new user. Format is: > # login-tty permdevice:[device]:... > /dev/ttyC0 0600 > /dev/console:/dev/wskbd:/dev/wskbd0:/dev/wsmouse:/dev/wsmouse0:/dev/ttyCcfg > /dev/X0 0600/dev/wsmouse:/dev/wsmouse0 > # samples > #/dev/ttyC0 0600/dev/fd0 > /dev/ttyC4 0755/dev/cd0a:/dev/rcd0c > Hi Laurence, as this is your own laptop - is your unprivileged user added to sudoers? This is how I manage to handle mounting CDs: ~~~ $ cat /etc/fstab grep cd /dev/cd0a /cdrom cd9660 ro,noauto 0 0 # read only /dev/cd0c /dvd cd9660 rw,noauto 0 0 # for burning CDs/DVDs $ sudo cat /etc/sudoers | grep NOPASSWD %wheel ALL=(ALL) NOPASSWD: SETENV: ALL ~~~ The "inconvenience" is that I always have to mount it with "sudo" prepended. You might as well restrict the allowed actions to just a few commands, e.g. 'mount'. See man sudoers As I do not share the laptop with others I can live with any theoretical issues that might go along with this setting. If s.o. gets physical access to the laptop I am in trouble anyway... Cheers, STEFAN Mit freundlichen Grüßen, STEFAN WOLLNY Regulatory Reporting Consultancy Tel.: +49 (0) 177 655 7875 Fax.: +49 (0) 3212 655 7875 Mail: ste...@wollny.de GnuPG-Key ID: 0x9C26F1D0
Re: Mount CD/DVD and playback DVD as normal user
Laurence Rochfort wrote: > What are the consequences of putting myself in the operator group? Members of group operator may * run shutdown(8), * read disk devices--intended for backups with dump(8), but of course it means that members can bypass any filesystem-permission-based read restrictions. -- Christian "naddy" Weisgerber na...@mips.inka.de
Re: Mount CD/DVD and playback DVD as normal user
This might help too http://undeadly.org/cgi?action=article&sid=20131113030229&mode=expanded On Wed, Nov 13, 2013 at 2:04 PM, Tomas Bodzar wrote: > On Tue, Nov 12, 2013 at 9:48 PM, Laurence Rochfort < > laurence.rochf...@gmail.com> wrote: > > > Thanks Fred, > > > > /cdrom is the mount point, so no I don't think it should be a symlink. > > > > The command is: > > > > $ mount /dev/cd0a /cdrom > > mount_cd9660: /dev/cd0a on /cdrom: Operation not permitted > > > > > You're pretty close. Please read this short thread > http://marc.info/?l=openbsd-misc&m=121837771306968&w=2 which will solve it > for you for sure. There are some limitations in combination of /etc/fstab > and kern.usermount > > > > > On 12 November 2013 20:27, Fred wrote: > > > On 11/12/13 18:56, Laurence Rochfort wrote: > > >> > > >> Thanks Tomas, > > >> > > >> I have set kern.usermount=1 now and added myself to the operator > > >> group, but still get operation denied when trying to mount a cdrom. > > >> > > >> Does the below look right? > > >> > > >> Thank you > > >> > > >> $ sysctl kern.usermount > > >> kern.usermount=1 > > >> > > >> $ groups > > >> laurence wheel operator > > >> > > >> $ ls -l / | grep cdrom > > >> drwxrwxr-x 2 root operator 512 Nov 8 14:29 cdrom > > >> > > >> $ ls -l /dev/cd* > > >> brwxrw 1 root operator6, 0 Nov 8 14:13 /dev/cd0a > > >> brw-rw 1 root operator6, 2 Nov 8 14:13 /dev/cd0c > > >> brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a > > >> brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c > > >> > > > > > > Surely /cdrom should be a symbolic link to /dev/cd0a? > > > > > > ie: > > > > > > ln -fs /dev/cd0a /cdrom > > > > > > hth > > > > > > Fred > > > > > > PS what command are you running that gives an operation denied?
Re: Mount CD/DVD and playback DVD as normal user
On Tue, Nov 12, 2013 at 9:48 PM, Laurence Rochfort < laurence.rochf...@gmail.com> wrote: > Thanks Fred, > > /cdrom is the mount point, so no I don't think it should be a symlink. > > The command is: > > $ mount /dev/cd0a /cdrom > mount_cd9660: /dev/cd0a on /cdrom: Operation not permitted > You're pretty close. Please read this short thread http://marc.info/?l=openbsd-misc&m=121837771306968&w=2 which will solve it for you for sure. There are some limitations in combination of /etc/fstab and kern.usermount > > On 12 November 2013 20:27, Fred wrote: > > On 11/12/13 18:56, Laurence Rochfort wrote: > >> > >> Thanks Tomas, > >> > >> I have set kern.usermount=1 now and added myself to the operator > >> group, but still get operation denied when trying to mount a cdrom. > >> > >> Does the below look right? > >> > >> Thank you > >> > >> $ sysctl kern.usermount > >> kern.usermount=1 > >> > >> $ groups > >> laurence wheel operator > >> > >> $ ls -l / | grep cdrom > >> drwxrwxr-x 2 root operator 512 Nov 8 14:29 cdrom > >> > >> $ ls -l /dev/cd* > >> brwxrw 1 root operator6, 0 Nov 8 14:13 /dev/cd0a > >> brw-rw 1 root operator6, 2 Nov 8 14:13 /dev/cd0c > >> brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a > >> brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c > >> > > > > Surely /cdrom should be a symbolic link to /dev/cd0a? > > > > ie: > > > > ln -fs /dev/cd0a /cdrom > > > > hth > > > > Fred > > > > PS what command are you running that gives an operation denied?
Re: Mount CD/DVD and playback DVD as normal user
There are many reasons for wanting to mount a CD/DVD, perhaps to restore a backup or to access files from someone who only just recently made the transition from floppy. But for the two most common reasons today.. * Music/Audio discs, containing no filesystem and cannot be mounted. cdio(1) in base can be used to playback and rip audio CD's using the raw device node directly, as can many other ports. * DVD Video discs, which do contain a filesystem.. but with encrypted files. There is libdvdread/libdvdcss, also in ports, and runtime dependencies for many media players, and like cdio work by directly manipulating the device. -Bryan.
Re: Mount CD/DVD and playback DVD as normal user
Fred writes: > On 11/12/13 20:48, Laurence Rochfort wrote: >> Thanks Fred, >> >> /cdrom is the mount point, so no I don't think it should be a symlink. >> >> The command is: >> >> $ mount /dev/cd0a /cdrom >> mount_cd9660: /dev/cd0a on /cdrom: Operation not permitted > > Hi Laurence, > > You are right it should just be a node so not a symlink. > > The issue is with root owning /cdrom - but if you add /cdrom entry to fbtab: > > port:fred ~> tail -2 /etc/fbtab > #/dev/ttyC0 0600/dev/fd0 > /dev/ttyC00600/cdrom ^ 0700 *might* give better results. > Then the user who logs in can then mount /cdrom > > port:fred ~> mount -tcd9660 /dev/cd0a /cdrom > port:fred ~> mount > /dev/sd0a on / type ffs (local) > /dev/sd0k on /home type ffs (local, nodev, nosuid) > /dev/sd0d on /tmp type ffs (local, nodev, nosuid) > /dev/sd0f on /usr type ffs (local, nodev) > /dev/sd0g on /usr/X11R6 type ffs (local, nodev) > /dev/sd0h on /usr/local type ffs (local, nodev) > /dev/sd0j on /usr/obj type ffs (local, nodev, nosuid) > /dev/sd0i on /usr/src type ffs (local, nodev, nosuid) > /dev/sd0e on /var type ffs (local, nodev, nosuid) > /dev/sd2i on /mnt/usbpen type msdos (local) > /dev/cd0a on /cdrom type cd9660 (local, nodev, nosuid, read-only) > > I had to read mount(8) and fbtab(5) to work it out... > > hth > > Fred -- jca | PGP : 0x06A11494 / 61DB D9A0 00A4 67CF 2A90 8961 6191 8FBF 06A1 1494
Re: Mount CD/DVD and playback DVD as normal user
On 11/12/13 20:48, Laurence Rochfort wrote: Thanks Fred, /cdrom is the mount point, so no I don't think it should be a symlink. The command is: $ mount /dev/cd0a /cdrom mount_cd9660: /dev/cd0a on /cdrom: Operation not permitted Hi Laurence, You are right it should just be a node so not a symlink. The issue is with root owning /cdrom - but if you add /cdrom entry to fbtab: port:fred ~> tail -2 /etc/fbtab #/dev/ttyC0 0600/dev/fd0 /dev/ttyC0 0600/cdrom Then the user who logs in can then mount /cdrom port:fred ~> mount -tcd9660 /dev/cd0a /cdrom port:fred ~> mount /dev/sd0a on / type ffs (local) /dev/sd0k on /home type ffs (local, nodev, nosuid) /dev/sd0d on /tmp type ffs (local, nodev, nosuid) /dev/sd0f on /usr type ffs (local, nodev) /dev/sd0g on /usr/X11R6 type ffs (local, nodev) /dev/sd0h on /usr/local type ffs (local, nodev) /dev/sd0j on /usr/obj type ffs (local, nodev, nosuid) /dev/sd0i on /usr/src type ffs (local, nodev, nosuid) /dev/sd0e on /var type ffs (local, nodev, nosuid) /dev/sd2i on /mnt/usbpen type msdos (local) /dev/cd0a on /cdrom type cd9660 (local, nodev, nosuid, read-only) I had to read mount(8) and fbtab(5) to work it out... hth Fred
Re: Mount CD/DVD and playback DVD as normal user
Thanks Fred, /cdrom is the mount point, so no I don't think it should be a symlink. The command is: $ mount /dev/cd0a /cdrom mount_cd9660: /dev/cd0a on /cdrom: Operation not permitted On 12 November 2013 20:27, Fred wrote: > On 11/12/13 18:56, Laurence Rochfort wrote: >> >> Thanks Tomas, >> >> I have set kern.usermount=1 now and added myself to the operator >> group, but still get operation denied when trying to mount a cdrom. >> >> Does the below look right? >> >> Thank you >> >> $ sysctl kern.usermount >> kern.usermount=1 >> >> $ groups >> laurence wheel operator >> >> $ ls -l / | grep cdrom >> drwxrwxr-x 2 root operator 512 Nov 8 14:29 cdrom >> >> $ ls -l /dev/cd* >> brwxrw 1 root operator6, 0 Nov 8 14:13 /dev/cd0a >> brw-rw 1 root operator6, 2 Nov 8 14:13 /dev/cd0c >> brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a >> brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c >> > > Surely /cdrom should be a symbolic link to /dev/cd0a? > > ie: > > ln -fs /dev/cd0a /cdrom > > hth > > Fred > > PS what command are you running that gives an operation denied?
Re: Mount CD/DVD and playback DVD as normal user
On 11/12/13 18:56, Laurence Rochfort wrote: Thanks Tomas, I have set kern.usermount=1 now and added myself to the operator group, but still get operation denied when trying to mount a cdrom. Does the below look right? Thank you $ sysctl kern.usermount kern.usermount=1 $ groups laurence wheel operator $ ls -l / | grep cdrom drwxrwxr-x 2 root operator 512 Nov 8 14:29 cdrom $ ls -l /dev/cd* brwxrw 1 root operator6, 0 Nov 8 14:13 /dev/cd0a brw-rw 1 root operator6, 2 Nov 8 14:13 /dev/cd0c brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c Surely /cdrom should be a symbolic link to /dev/cd0a? ie: ln -fs /dev/cd0a /cdrom hth Fred PS what command are you running that gives an operation denied?
Re: Mount CD/DVD and playback DVD as normal user
Thanks Tomas, I have set kern.usermount=1 now and added myself to the operator group, but still get operation denied when trying to mount a cdrom. Does the below look right? Thank you $ sysctl kern.usermount kern.usermount=1 $ groups laurence wheel operator $ ls -l / | grep cdrom drwxrwxr-x 2 root operator 512 Nov 8 14:29 cdrom $ ls -l /dev/cd* brwxrw 1 root operator6, 0 Nov 8 14:13 /dev/cd0a brw-rw 1 root operator6, 2 Nov 8 14:13 /dev/cd0c brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c On 12 November 2013 12:48, Tomas Bodzar wrote: > > > > On Mon, Nov 11, 2013 at 11:08 PM, Laurence Rochfort > wrote: >> >> Hello, >> >> I'm trying to configure my laptop so that a normal user may mount a >> CD/DVD or playback a DVD in Xine. >> >> So far I've just put an entry in /etc/fbtab. /cdrom permissions look >> OK, but the devices themselves less so. > > > > Check sysctl kern.usermount option > >> >> >> What are the consequences of putting myself in the operator group? >> Where can I find a description of those groups? >> >> Advice greatly appreciated. >> >> Cheers, >> Laurence. >> >> drwxr-xr-x 2 root wheel 512 Nov 8 14:29 cdrom >> >> brw-r- 1 root operator6, 0 Nov 8 14:13 /dev/cd0a >> brw-r- 1 root operator6, 2 Nov 8 14:13 /dev/cd0c >> brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a >> brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c >> crw-r- 1 root operator 15, 0 Nov 8 14:13 /dev/rcd0a >> crw-r- 1 root operator 15, 2 Nov 8 14:13 /dev/rcd0c >> crw-r- 1 root operator 15, 16 Nov 8 14:13 /dev/rcd1a >> crw-r- 1 root operator 15, 18 Nov 8 14:13 /dev/rcd1c >> >> # $OpenBSD: fbtab.head,v 1.2 1999/05/05 06:56:34 deraadt Exp $ >> # login(1) reads this file to determine which devices should be chown'd to >> # the new user. Format is: >> # login-tty permdevice:[device]:... >> /dev/ttyC0 0600 >> >> /dev/console:/dev/wskbd:/dev/wskbd0:/dev/wsmouse:/dev/wsmouse0:/dev/ttyCcfg >> /dev/X0 0600/dev/wsmouse:/dev/wsmouse0 >> # samples >> #/dev/ttyC0 0600/dev/fd0 >> /dev/ttyC4 0755/dev/cd0a:/dev/rcd0c
Re: Mount CD/DVD and playback DVD as normal user
On Mon, Nov 11, 2013 at 11:08 PM, Laurence Rochfort < laurence.rochf...@gmail.com> wrote: > Hello, > > I'm trying to configure my laptop so that a normal user may mount a > CD/DVD or playback a DVD in Xine. > > So far I've just put an entry in /etc/fbtab. /cdrom permissions look > OK, but the devices themselves less so. > Check sysctl kern.usermount option > > What are the consequences of putting myself in the operator group? > Where can I find a description of those groups? > > Advice greatly appreciated. > > Cheers, > Laurence. > > drwxr-xr-x 2 root wheel 512 Nov 8 14:29 cdrom > > brw-r- 1 root operator6, 0 Nov 8 14:13 /dev/cd0a > brw-r- 1 root operator6, 2 Nov 8 14:13 /dev/cd0c > brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a > brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c > crw-r- 1 root operator 15, 0 Nov 8 14:13 /dev/rcd0a > crw-r- 1 root operator 15, 2 Nov 8 14:13 /dev/rcd0c > crw-r- 1 root operator 15, 16 Nov 8 14:13 /dev/rcd1a > crw-r- 1 root operator 15, 18 Nov 8 14:13 /dev/rcd1c > > # $OpenBSD: fbtab.head,v 1.2 1999/05/05 06:56:34 deraadt Exp $ > # login(1) reads this file to determine which devices should be chown'd to > # the new user. Format is: > # login-tty permdevice:[device]:... > /dev/ttyC0 0600 > /dev/console:/dev/wskbd:/dev/wskbd0:/dev/wsmouse:/dev/wsmouse0:/dev/ttyCcfg > /dev/X0 0600/dev/wsmouse:/dev/wsmouse0 > # samples > #/dev/ttyC0 0600/dev/fd0 > /dev/ttyC4 0755/dev/cd0a:/dev/rcd0c
Re: Mount CD/DVD and playback DVD as normal user
2013/11/11 Laurence Rochfort : > Hello, > > I'm trying to configure my laptop so that a normal user may mount a > CD/DVD or playback a DVD in Xine. I never used it but have you seen: http://www.bsdua.org/hotplug-diskmount.html ? mark > So far I've just put an entry in /etc/fbtab. /cdrom permissions look > OK, but the devices themselves less so. > > What are the consequences of putting myself in the operator group? > Where can I find a description of those groups? > > Advice greatly appreciated. > > Cheers, > Laurence. > > drwxr-xr-x 2 root wheel 512 Nov 8 14:29 cdrom > > brw-r- 1 root operator6, 0 Nov 8 14:13 /dev/cd0a > brw-r- 1 root operator6, 2 Nov 8 14:13 /dev/cd0c > brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a > brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c > crw-r- 1 root operator 15, 0 Nov 8 14:13 /dev/rcd0a > crw-r- 1 root operator 15, 2 Nov 8 14:13 /dev/rcd0c > crw-r- 1 root operator 15, 16 Nov 8 14:13 /dev/rcd1a > crw-r- 1 root operator 15, 18 Nov 8 14:13 /dev/rcd1c > > # $OpenBSD: fbtab.head,v 1.2 1999/05/05 06:56:34 deraadt Exp $ > # login(1) reads this file to determine which devices should be chown'd to > # the new user. Format is: > # login-tty permdevice:[device]:... > /dev/ttyC0 0600 > /dev/console:/dev/wskbd:/dev/wskbd0:/dev/wsmouse:/dev/wsmouse0:/dev/ttyCcfg > /dev/X0 0600/dev/wsmouse:/dev/wsmouse0 > # samples > #/dev/ttyC0 0600/dev/fd0 > /dev/ttyC4 0755/dev/cd0a:/dev/rcd0c > -- Disclaimer; This message is just a reflection of what I thought at the time of sending. The message may contain information that is not intended for you or that you don't understand.
Mount CD/DVD and playback DVD as normal user
Hello, I'm trying to configure my laptop so that a normal user may mount a CD/DVD or playback a DVD in Xine. So far I've just put an entry in /etc/fbtab. /cdrom permissions look OK, but the devices themselves less so. What are the consequences of putting myself in the operator group? Where can I find a description of those groups? Advice greatly appreciated. Cheers, Laurence. drwxr-xr-x 2 root wheel 512 Nov 8 14:29 cdrom brw-r- 1 root operator6, 0 Nov 8 14:13 /dev/cd0a brw-r- 1 root operator6, 2 Nov 8 14:13 /dev/cd0c brw-r- 1 root operator6, 16 Nov 8 14:13 /dev/cd1a brw-r- 1 root operator6, 18 Nov 8 14:13 /dev/cd1c crw-r- 1 root operator 15, 0 Nov 8 14:13 /dev/rcd0a crw-r- 1 root operator 15, 2 Nov 8 14:13 /dev/rcd0c crw-r- 1 root operator 15, 16 Nov 8 14:13 /dev/rcd1a crw-r- 1 root operator 15, 18 Nov 8 14:13 /dev/rcd1c # $OpenBSD: fbtab.head,v 1.2 1999/05/05 06:56:34 deraadt Exp $ # login(1) reads this file to determine which devices should be chown'd to # the new user. Format is: # login-tty permdevice:[device]:... /dev/ttyC0 0600 /dev/console:/dev/wskbd:/dev/wskbd0:/dev/wsmouse:/dev/wsmouse0:/dev/ttyCcfg /dev/X0 0600/dev/wsmouse:/dev/wsmouse0 # samples #/dev/ttyC0 0600/dev/fd0 /dev/ttyC4 0755/dev/cd0a:/dev/rcd0c
