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.
The sched_getparam() function shall return the scheduling parameters
of a process specified by pid in the sched_param structure pointed to
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.
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
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
The following sections are informative.
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information
Technology -- Portable Operating System Interface (POSIX), The Open
Group Base Specifications Issue 7, Copyright (C) 2013 by the
Institute of Electrical and Electronics Engineers, Inc and The Open
Group. (This is POSIX.1-2008 with the 2013 Technical Corrigendum 1
applied.) 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 original
Standard can be obtained online at http://www.unix.org/online.html .
Any typographical or formatting errors that appear in this page are
most likely to have been introduced during the conversion of the
source files to man page format. To report such errors, see
IEEE/The Open Group 2013 SCHED_GETPARAM(3P)