SCHED_GETSCHEDULER(3P) POSIX Programmer's Manual SCHED_GETSCHEDULER(3P)PROLOG
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.
NAMEsched_getscheduler — get scheduling policy (REALTIME)
SYNOPSIS
#include <sched.h>
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 unsuccess‐
ful, the function shall return −1 and set errno to indicate the error.
ERRORS
The sched_getscheduler() function shall fail if:
EPERM The requesting process does not have permission to determine the
scheduling policy of the specified process.
ESRCH No process can be found corresponding to that specified by pid.
The following sections are informative.
EXAMPLES
None.
APPLICATION USAGE
None.
RATIONALE
None.
FUTURE DIRECTIONS
None.
SEE ALSOsched_getparam(), sched_setparam(), sched_setscheduler()
The Base Definitions volume of POSIX.1‐2008, <sched.h>
COPYRIGHT
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 Electri‐
cal 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 http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the source
files to man page format. To report such errors, see https://www.ker‐
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IEEE/The Open Group 2013 SCHED_GETSCHEDULER(3P)
