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Changing the perms on /dev/ttyS0 manually will not persist between reboots. |
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You should change the udev rules in /etc/udev/rules.d/ or add "nut" to the |
| 3 |
uucp group in /etc/group. |
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|
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As for why your su doesn't work, I am not sure. Works for me, my root user is |
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in the wheel group and the user I su to exists. |
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|
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On Tuesday, May 8, 2007 07:55, Vieri wrote: |
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> --- Vieri <rentorbuy@×××××.com> wrote: |
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> > Hi, |
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> > |
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> > I've recently installed a gentoo box with the |
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> > hardend |
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> > profile + hardened-sources so I'm new to all this. |
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> > |
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> > I have two basic questions that I can't seem to |
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> > answer. |
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> > |
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> > 1) SU: |
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> > on the non-hardened gentoo box I'm used to, I can |
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> > enter as root and then do a "su username" and a |
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> > whoami |
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> > shows that username. However, in the hardened box, |
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> > issuing "su username" doesn't do anything and whoami |
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> > is still root. I can't see any log messages related |
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> > to |
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> > this. Is this behavior normal? |
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> > |
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> > 2) TTY: |
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> > on my non-hardened gentoo I emerged sys-power/nut |
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> > which is a UPS monitoring tool and needs to access |
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> > /dev/ttySx. The nut driver is supposed to run under |
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> > the nut user/group which is also part of the tty |
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> > group. In other words, the application has correct |
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> > access to the device. However, in my hardened box |
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> > after emerging without errors and verifying that the |
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> > nut user was added to the tty group, the nut app |
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> > fails |
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> > when trying to access /dev/ttyS0 and reports |
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> > "permission denied". |
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> > |
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> > I'm sure all this is due to my lack of experience |
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> > but |
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> > could someone please give me the big picture. |
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> |
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> May I add: |
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> |
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> non-hardened # ls -la /dev/ttyS0 |
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> lrwxrwxrwx 1 root root 5 Apr 27 12:39 /dev/ttyS0 -> |
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> tts/0 |
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> |
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> hardened # ls -la /dev/ttyS0 |
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> crw-rw---- 1 root uucp 4, 64 May 8 00:19 /dev/ttyS0 |
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> |
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> Do I just need to manually change permissions for this |
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> device? |
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> |
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> > Thank you. |
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> > |
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> > Vieri |
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> |
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> __________________________________________________ |
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| 65 |
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