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RTAS(2)                       System Calls Manual                      RTAS(2)

NAME
       rtas - Allows userspace to call RTAS (Run Time Abstraction Services)
SYNOPSIS
       int ppc_rtas (struct rtas_args *uargs);

DESCRIPTION
       ppc_rtas enables userspace manipulation of the RunTime Abstraction Ser-
       vices (RTAS). RTAS provides for a portable method of access and setting
       system  information. For example, you could gather information on vari-
       ous system sensors and set poweron values. RTAS  is  accessed  via  the
       /proc  entry  called  "rtas". Manipulations on RTAS are implemented via
       command line arguments on /proc/rtas.  The values for uargs vary great-
       ly.  For more information, see the view/arch/ppcKconfig file.

RETURN VALUE
       rtas returns 0 on success; otherwise it returns one of the errors list-
       ed in the "Errors" section.

ERRORS
       -EPERM User does not have CAP_SYS_ADMIN capabilities.

       -EFAULT
              Problem copying uargs values to/from user space.

       -EINVAL
              Either number of uargs passed in too large or size of uargs  ar-
              ray too large.

AUTHOR
       Niki Rahimi.

                                                                       RTAS(2)