SCHED_GETSCHEDULER(P) POSIX Programmer's Manual SCHED_GETSCHEDULER(P)
sched_getscheduler - get scheduling policy (REALTIME)
int sched_getscheduler(pid_t pid);
The sched_getscheduler() function shall return the scheduling policy of the process speci-
fied 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>
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.
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.
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.
sched_getparam() , sched_setparam() , sched_setscheduler() , the Base Definitions volume
of IEEE Std 1003.1-2001, <sched.h>
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 orig-
inal Standard can be obtained online at http://www.opengroup.org/unix/online.html .
IEEE/The Open Group 2003 SCHED_GETSCHEDULER(P)