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CentOS 7.0 - man page for rtas (centos section 2)

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RTAS(2) 										  RTAS(2)

       rtas - Allows userspace to call RTAS (Run Time Abstraction Services)

       int ppc_rtas (struct rtas_args *uargs);

       ppc_rtas  enables  userspace manipulation of the RunTime Abstraction Services (RTAS). RTAS
       provides for a portable method of access and setting system information. For example,  you
       could  gather  information  on  various system sensors and set poweron values. RTAS is ac-
       cessed via the /proc entry called "rtas". Manipulations on RTAS are implemented	via  com-
       mand  line arguments on /proc/rtas.  The values for uargs vary greatly.	For more informa-
       tion, see the view/arch/ppcKconfig file.

       rtas returns 0 on success; otherwise it returns one of the errors listed in  the  "Errors"

       -EPERM User does not have CAP_SYS_ADMIN capabilities.

	      Problem copying uargs values to/from user space.

	      Either number of uargs passed in too large or size of uargs array too large.

       Niki Rahimi.

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