[LAD] QTractor: QThreads: Not realtime on Linux without root?

Felipe Ferreri Tonello eu at felipetonello.com
Wed Jan 11 12:21:16 UTC 2017

Hi Ralf,

On 03/01/17 21:37, Ralf Mattes wrote:
> Am Dienstag, 03. Januar 2017 19:31 CET, Felipe Ferreri Tonello <eu at felipetonello.com> schrieb: 
>> If sched_setscheduler() returns -1, check if errno is set to EPERM. In
>> this case the user trying to perform this operation does not have
>> CAP_SYS_NICE[1] capability, which is *required*.
>> [1] http://man7.org/linux/man-pages/man7/capabilities.7.html
>> If you want this type of feature, set CAP_SYS_NICE to the group audio
>> that you are referring.
> ??? How can I grant capabilities to a group? I thought capabilites where either given to
> a user (via /etc/security/capability.conf) or to a binary (by means of setcap).

AFAIK, pam_cap support users and groups.

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