NAME
sched_getscheduler —
get scheduling policy (REALTIME)
SYNOPSIS
int sched_getscheduler(pid_t pid);
DESCRIPTION
The sched_getscheduler () function shall
return the scheduling policy of the process specified by
pid. If the value of pid is negative,
the behavior of the sched_getscheduler () function
is unspecified.
The values that can be returned by
sched_getscheduler () are defined in the
<sched.h> header.
If a process specified by pid exists, and if the calling process has permission, the scheduling policy shall be returned for the process whose process ID is equal to pid.
If pid is zero, the scheduling policy shall be returned for the calling process.
RETURN VALUE
Upon successful completion, the
sched_getscheduler () function shall return the
scheduling policy of the specified process. If unsuccessful, the function
shall return -1 and set
errno to
indicate the error.
ERRORS
The sched_getscheduler () function shall
fail if:
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSO
sched_getparam(3), sched_setparam(3), sched_setscheduler(3)
XBD <sched.h>
CHANGE HISTORY
First released in Issue 5. Included for alignment with the POSIX Realtime Extension.
Issue 6
The sched_getscheduler () function is
marked as part of the Process Scheduling option.
The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the Process Scheduling option.