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Full Discussion: controll access to a device
Top Forums UNIX for Dummies Questions & Answers controll access to a device Post 302267257 by Pavel.Bures on Friday 12th of December 2008 03:23:44 AM
Old 12-12-2008
controll access to a device

Hello everyone,
I write a program (Linux & Solaris) that will run as non-root user, but the program must have rw access to a device /dev/ipmi (on linux) or /dev/bmc (on solaris).

What is the standard way of granting such access?
Linux:
chmod on /dev/ipmi ?
suid root my program?

Solaris:
RBAC?
chmod on /dev/bmc?
suid root my program?


I am searching for the proper unix approach, so I don't create any security vulnerabilities or awkward solution.

Thanks a lot!
--Pavel.
 

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mkdevalloc(1M)						  System Administration Commands					    mkdevalloc(1M)

NAME
mkdevalloc - Make device_allocate entries SYNOPSIS
/usr/sbin/mkdevalloc DESCRIPTION
The mkdevalloc command writes to standard out a set of device_allocate(4) entries describing the system's frame buffer, audio and removable media devices. The mkdevalloc command is used by the init.d(4) scripts to create or update the /etc/security/device_allocate file. Entries are generated based on the device special files found in /dev. For the different categories of devices, the mkdevalloc command checks for the following files under /dev: audio /dev/audio, /dev/audioctl, /dev/sound/... tape /dev/rst*, /dev/nrst*, /dev/rmt/... floppy /dev/diskette, /dev/fd*, /dev/rdiskette, /dev/rfd* removable disk /dev/sr*, /dev/nsr*, /dev/dsk/c0t?d0s?, /dev/rdsk/c0t?d0s? frame buffer /dev/fb All entries set the device-minimum and device-maximum fields to the hex representations of ADMIN_LOW and ADMIN_HIGH, respectively. The device-authorization field is set to solaris.device.allocate, except for the framebuffer entry, where it is set to *. The device-name, device-type and device-clean fields are set to the following values: device-name device-type device-clean audio audio audio audio_clean_wrapper tape mag_tape_0,1,... st st_clean floppy floppy_0,1,... fd disk_clean removable disk cdrom_0,1,... sr disk_clean frame buffer framebuffer fb /bin/true ATTRIBUTES
See attributes(5) for descriptions of the following attributes: +-----------------------------+-----------------------------+ | ATTRIBUTE TYPE | ATTRIBUTE VALUE | +-----------------------------+-----------------------------+ |Availability |SUNWcsu | +-----------------------------+-----------------------------+ |Interface Stability |Obsolete | +-----------------------------+-----------------------------+ SEE ALSO
allocate(1), bsmconv(1M), attributes(5) NOTES
mkdevalloc might not be supported in a future release of the Solaris operating system. SunOS 5.10 8 Oct 2003 mkdevalloc(1M)
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