Section: POSIX Programmer's Manual (3P)
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.
--- get scheduling policy
int sched_getscheduler(pid_t pid);
function shall return the scheduling policy of the process specified by
If the value of
is negative, the behavior of the
function is unspecified.
The values that can be returned by
are defined in the
If a process specified by
exists, and if the calling process has permission, the scheduling
policy shall be returned for the process whose process ID is equal to
is zero, the scheduling policy shall be returned for the calling process.
Upon successful completion, the
function shall return the scheduling policy of the specified process.
If unsuccessful, the function shall return -1 and set
to indicate the error.
function shall fail if:
The requesting process does not have permission to determine the
scheduling policy of the specified process.
No process can be found corresponding to that specified by
The following sections are informative.
The Base Definitions volume of POSIX.1-2008,
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) In the
event of any discrepancy between this version and the original IEEE and
The Open Group Standard, the original IEEE and The Open Group Standard
is the referee document. The original Standard can be obtained online at
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