SCHED_GETSCHEDULER(P) POSIX Programmer's Manual SCHED_GETSCHEDULER(P)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 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 ALSOsched_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 .
IEEE/The Open Group 2003 SCHED_GETSCHEDULER(P)
