SCHED_GETPARAM
Section: POSIX Programmer's Manual (3P)
Updated: 2017
Page Index
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.
NAME
sched_getparam
--- get scheduling parameters
(
REALTIME)
SYNOPSIS
#include <sched.h>
int sched_getparam(pid_t pid, struct sched_param *param);
DESCRIPTION
The
sched_getparam()
function shall return the scheduling parameters of a process specified by
pid
in the
sched_param
structure pointed to by
param.
If a process specified by
pid
exists, and if the calling process has permission, the scheduling
parameters for the process whose process ID is equal to
pid
shall be returned.
If
pid
is zero, the scheduling parameters for the calling process shall be
returned. The behavior of the
sched_getparam()
function is unspecified if the value of
pid
is negative.
RETURN VALUE
Upon successful completion, the
sched_getparam()
function shall return zero. If the call to
sched_getparam()
is unsuccessful, the function shall return a value of -1 and set
errno
to indicate the error.
ERRORS
The
sched_getparam()
function shall fail if:
- EPERM
-
The requesting process does not have permission to obtain the
scheduling parameters 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 ALSO
sched_getscheduler(),
sched_setparam(),
sched_setscheduler()
The Base Definitions volume of POSIX.1-2017,
<sched.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1-2017, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, 2018 Edition,
Copyright (C) 2018 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
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.opengroup.org/unix/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
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https://www.kernel.org/doc/man-pages/reporting_bugs.html .