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SCHED_GETSCHEDULER
Section: POSIX Programmer's Manual (3P)
Updated: 2003
Index
Return to Main Contents
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_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 unsuccessful, 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 ALSO
sched_getparam(), sched_setparam(), sched_setscheduler(),
the Base Definitions volume of IEEE Std 1003.1-2001, <sched.h>
COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 6, Copyright (C) 2001-2003 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 .
Index
- PROLOG
-
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- EXAMPLES
-
- APPLICATION USAGE
-
- RATIONALE
-
- FUTURE DIRECTIONS
-
- SEE ALSO
-
- COPYRIGHT
-
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