artswrapper(7) [suse man page]

artswrapper(7)							       Arts							    artswrapper(7)

NAME

       artswrapper - used to set real-time priority to artsd, the KDE sound system

SYNOPSIS

       artswrapper [OPTION]

DESCRIPTION

       artswrapper gives artsd the capability of running with real-time scheduling priority. This helps prevent audio skips and jumps.

       Except  for  the  check option, artswrapper passes all other arguments directly to artsd. Artswrapper calls the arguments after setting the
       real-time priority and dropping privileges (if running as setuid root).

       The real-time status is passed to artsd via the environment variable STARTED_THROUGH_ARTSWRAPPER, and can be one of the	following  values:
       unset  (not  running as real-time), 1 (running as real-time), 2 (no privileges to set real-time scheduling), or 3 (no support for real-time
       scheduling).

OPTIONS

       check backward compatibility with old artswrapper.  This only prints "okay" and exits.

SECURITY

       artswrapper must be used as setuid root to have privileges to set real-time scheduling.

BUGS

       Sometimes artsd locks the system on exit in 2.4 kernels.  If this happens, use aKode library, which improves the CPU usage, helps  maintain
       uninterrupted sound, and remove the setuid bit from artswrapper (thanks to Debian documentation and Christopher Martin).

SEE ALSO

       artsd, artsdsp

AUTHOR

       Manpage written by Rodrigo Rubira Branco <rrbranco@br.ibm.com>

KDE Multimedia							   Jun 01, 2006 						    artswrapper(7)

rtprio(1)						      General Commands Manual							 rtprio(1)

NAME

       rtprio - execute process with real-time priority

SYNOPSIS

       priority command [arguments]

       priority

       command [arguments]

DESCRIPTION

       executes  command  with	a  real-time priority, or changes the real-time priority of currently executing process pid.  Real-time priorities
       range from zero (highest) to 127 (lowest).  Real-time processes are not subject to priority degradation, and are all of	greater  (schedul-
       ing) importance than non-real-time processes.  See rtprio(2) for more details.

       If  is specified instead of a real-time priority, executes command with a timeshare (non-real-time) priority, or changes the currently exe-
       cuting process pid from a possibly real-time priority to a timeshare priority.  The former is useful to spawn a timeshare priority  command
       from a real-time priority shell.

       If  is  not  specified, command is not scheduled, or pid's real-time priority is not changed, if the user is not a member of a group having
       access and is not the user with appropriate privileges.	When changing the real-time priority of a currently executing process, the  effec-
       tive  user  ID of the calling process must be the user with appropriate privileges, or the real or effective user ID must match the real or
       saved user ID of the process to be modified.

RETURN VALUE

       returns exit status 0 if command is successfully scheduled or if pid's real-time priority is successfully changed, 1 if command is not exe-
       cutable	or pid does not exist, and 2 if command (pid) lacks real-time capability, or the invoker's effective user ID is not a user who has
       appropriate privileges, or the real or effective user or the real or effective user ID does not match the real or  saved  user  ID  of  the
       process being changed.

EXAMPLES

       Execute file at a real-time priority of 100:

       Set the currently running process pid 24217 to a real-time priority of 40:

AUTHOR

       was developed by HP.

SEE ALSO

       setprivgrp(1M), getprivgrp(2), rtprio(2).

																	 rtprio(1)