>From: Karl-Heinz Herrmann <[EMAIL PROTECTED]>
>On 27-Nov-01 Alexander Skwar wrote:
>> So sprach �Sam Halliday� am 2001-11-27 um 16:49:31 +0000 :
>>> which device must i allow them to use in order that this scheduler can be
>>> utilised in cdrecord, and thus preventing buffer underruns under certain
>>> circumstances?
>cdrecord has to be set UID root (or run as root) as far as I know for real
>time scheduling. No normal user process is allowed to increase its priority
>above default (nice level 0).
>
>> I have the same setup (Mandrake) as you, and those are my permissions:
>>
>> [askwar@teich RPM]$ ls -la /usr/bin/cdrecord /dev/scd0
>> brw-rw---- 1 askwar cdwriter 11, 0 Aug 30 11:54 /dev/scd0
>> -rwsr-s--- 1 root cdwriter 183324 Aug 2 20:56 /usr/bin/cdrecord*
> ^ ^
>these "s" say its suid root, which means cdrecord will run with the
>priviledges of the owner and group of the *file* instead of the ones of the
>user starting it. In this case user "root", group "cdwriter".
>Only this in that above example is that only root and members of cdwrite are
>allowed to execute it. If you don't belong to that group it will not run at
>all. Depending on the system (single user, multi user in a shared
>environment/office) changing the permissions to:
>chmod 6755 /usr/bin/cdrecord
Don"t install cdrecord SIGD, and (more iportant) don"t tell people to do so....
J�rg
EMail:[EMAIL PROTECTED] (home) J�rg Schilling D-13353 Berlin
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