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 .