SCHED_GETSCHEDULER(3C) Standard C Library Functions SCHED_GETSCHEDULER(3C)

NAME

sched_getscheduler - get scheduling policy

SYNOPSIS

#include <sched.h>

int sched_getscheduler(pid_t pid);

DESCRIPTION

The sched_getscheduler() function returns 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 header <sched.h> and described on the sched_setscheduler(3C) manual
page.


If a process specified by pid exists and if the calling process has
permission, the scheduling policy will be returned for the process whose
process ID is equal to pid.


If pid is 0, the scheduling policy will be returned for the calling
process.

RETURN VALUES

Upon successful completion, the sched_getscheduler() function returns the
scheduling policy of the specified process. If unsuccessful, the function
returns -1 and sets errno to indicate the error.

ERRORS

The sched_getscheduler() function will 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.

ATTRIBUTES

See attributes(7) for descriptions of the following attributes:


+--------------------+-------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+--------------------+-------------------+
|Interface Stability | Committed |
+--------------------+-------------------+
|MT-Level | MT-Safe |
+--------------------+-------------------+
|Standard | See standards(7). |
+--------------------+-------------------+

SEE ALSO

sched_getparam(3C), sched_setparam(3C), sched_setscheduler(3C),
sched.h(3HEAD), librt(3LIB), attributes(7), standards(7)


April 1, 2008 SCHED_GETSCHEDULER(3C)