The Open Group Base Specifications Issue 7
IEEE Std 1003.1-2008, 2016 Edition
Copyright © 2001-2016 The IEEE and The Open Group

#### NAME

> sched_getparam - get scheduling parameters (REALTIME)

#### SYNOPSIS

> ``[PS] #include <sched.h>
> int sched_getparam(pid_t` pid`, struct sched_param *`param`);``
> `
> `

#### DESCRIPTION

> The sched_getparam() function shall return the scheduling parameters of a process specified by pid in the sched_param structure pointed to by param.

> 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 shall be returned.

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

#### RETURN VALUE

> Upon successful completion, the sched_getparam() function shall return zero. If the call to sched_getparam() is unsuccessful, the function shall return a value of -1 and set errno to indicate the error.

#### ERRORS

> The sched_getparam() function shall 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.

The following sections are informative.

#### EXAMPLES

> None.

#### APPLICATION USAGE

> None.

#### RATIONALE

> None.

#### FUTURE DIRECTIONS

> None.

#### SEE ALSO

> sched_getscheduler, sched_setparam, sched_setscheduler

> XBD <sched.h>

#### CHANGE HISTORY

> First released in Issue 5. Included for alignment with the POSIX Realtime Extension.

#### Issue 6

> The sched_getparam() function is marked as part of the Process Scheduling option.

> The [ENOSYS] error condition has been removed as stubs need not be provided if an implementation does not support the Process Scheduling option.

End of informative text.

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