SCHED_GETPARAM(3P)         POSIX Programmer's Manual        SCHED_GETPARAM(3P)

PROLOG
       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.

NAME
       sched_getparam -- get scheduling parameters (REALTIME)

SYNOPSIS
       #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()

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

COPYRIGHT
       Portions of this text are reprinted and reproduced in electronic form
       from IEEE Std 1003.1-2017, Standard for Information Technology --
       Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 7, 2018 Edition, Copyright (C) 2018 by the
       Institute of Electrical and Electronics Engineers, Inc and The Open
       Group.  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.opengroup.org/unix/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
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .

IEEE/The Open Group                  2017                   SCHED_GETPARAM(3P)