RTAS(2)                                                                                   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 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.


RETURN VALUE
       rtas returns 0 on success; otherwise it returns one of the errors listed 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 array too large.


AUTHOR
       Niki Rahimi.



                                                                                          RTAS(2)