sched_getparam - Man Page

get scheduling parameters (REALTIME)


This manual page is part of the POSIX Programmer's Manual. The Linux implementation of this interface may differ (consult the corresponding Linux manual page for details of Linux behavior), or the interface may not be implemented on Linux.


#include <sched.h>

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


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.


The sched_getparam() function shall fail if:


The requesting process does not have permission to obtain the scheduling parameters of the specified process.


No process can be found corresponding to that specified by pid.

The following sections are informative.



Application Usage




Future Directions


See Also

sched_getscheduler(), sched_setparam(), sched_setscheduler()

The Base Definitions volume of POSIX.1-2017, <sched.h>

Referenced By

pthread_getschedparam(3p), sched_get_priority_max(3p), sched_getscheduler(3p), sched.h(0p), sched_rr_get_interval(3p), sched_setparam(3p), sched_setscheduler(3p).

2017 IEEE/The Open Group POSIX Programmer's Manual