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_getscheduler — get scheduling policy (REALTIME)

SYNOPSIS

       #include <sched.h>

       int sched_getscheduler(pid_t pid);

DESCRIPTION

       The sched_getscheduler() function shall return the scheduling policy of the process specified by pid.  If
       the value of pid is negative, the behavior of the sched_getscheduler() function is unspecified.

       The values that can be returned by sched_getscheduler() are defined in the <sched.h> header.

       If a process specified by pid exists, and if the calling process has permission,  the  scheduling  policy
       shall be returned for the process whose process ID is equal to pid.

       If pid is zero, the scheduling policy shall be returned for the calling process.

RETURN VALUE

       Upon  successful  completion, the sched_getscheduler() function shall return the scheduling policy of the
       specified process.  If unsuccessful, the function shall return −1 and set errno to indicate the error.

ERRORS

       The sched_getscheduler() function shall fail if:

       EPERM  The requesting process does not  have  permission  to  determine  the  scheduling  policy  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_getparam(), sched_setparam(), sched_setscheduler()

       The Base Definitions volume of POSIX.1‐2008, <sched.h>

COPYRIGHT

       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
       https://www.kernel.org/doc/man-pages/reporting_bugs.html .