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 .