RTAS(2) System Calls Manual RTAS(2)

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

SYNOPSIS
       int ppcrtas (struct rtasargs *uargs);


DESCRIPTION
       ppcrtas 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 CAPSYSADMIN 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)