diff options
Diffstat (limited to 'lib/libc/sys/rtprio.2')
| -rw-r--r-- | lib/libc/sys/rtprio.2 | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/lib/libc/sys/rtprio.2 b/lib/libc/sys/rtprio.2 index 579ed1b..3ee2a91 100644 --- a/lib/libc/sys/rtprio.2 +++ b/lib/libc/sys/rtprio.2 @@ -44,7 +44,8 @@ is used to lookup or change the realtime or idle priority of a process. .Fa function -specifies the operation to be performed. RTP_LOOKUP to lookup the current priority, +specifies the operation to be performed. +RTP_LOOKUP to lookup the current priority, and RTP_SET to set the priority. .Fa pid specifies the process to be used, 0 for the current process. @@ -73,11 +74,14 @@ Realtime and idle priority is inherited through fork() and exec(). A realtime process can only be preempted by a process of equal or higher priority, or by an interrupt; idle priority processes will run only -when no other real/normal priority process is runnable. Higher real/idle priority processes -preempt lower real/idle priority processes. Processes of equal real/idle priority are run round-robin. +when no other real/normal priority process is runnable. +Higher real/idle priority processes +preempt lower real/idle priority processes. +Processes of equal real/idle priority are run round-robin. .Sh RETURN VALUES .Fn rtprio -will return 0 for success and -1 for all errors. The global variable +will return 0 for success and -1 for all errors. +The global variable .Va errno will be set to indicate the error. .Sh ERRORS @@ -89,7 +93,8 @@ The specified .Fa prio was out of range. .It Bq Er EPERM -The calling process is not allowed to set the realtime priority. Only +The calling process is not allowed to set the realtime priority. +Only root is allowed to change the realtime priority of any process, and non-root may only change the idle priority of the current process. .It Bq Er ESRCH |
