SCHED_GETPARAM(3C) Standard C Library Functions SCHED_GETPARAM(3C)

NAME

sched_getparam - get scheduling parameters

SYNOPSIS

#include <sched.h>

int sched_getparam(pid_t pid, struct sched_param *param);

DESCRIPTION

The sched_getparam() function returns the scheduling parameters of a
process specified by pid in the sched_param structure pointed to by
param. The only required member of param is sched_priority.


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


If pid is 0, the scheduling parameters for the calling process will
be returned. The behavior of the sched_getparam() function is
unspecified if the value of pid is negative.

RETURN VALUES

Upon successful completion, the sched_getparam() function returns 0.
If the call to sched_getparam() is unsuccessful, the function returns
-1 and sets errno to indicate the error.

ERRORS

The sched_getparam() function will fail if:

EPERM
The requesting process does not have permission to obtain
the scheduling parameters 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_getscheduler(3C), sched_setparam(3C), sched_setscheduler(3C),
sched.h(3HEAD), librt(3LIB), attributes(7), standards(7)

April 1, 2008 SCHED_GETPARAM(3C)