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SCHED_GETSCHEDULER

Section: POSIX Programmer's Manual (3P)
Updated: 2013
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 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 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 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.kernel.org/doc/man-pages/reporting_bugs.html .


 

Index

PROLOG
NAME
SYNOPSIS
DESCRIPTION
RETURN VALUE
ERRORS
EXAMPLES
APPLICATION USAGE
RATIONALE
FUTURE DIRECTIONS
SEE ALSO
COPYRIGHT





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