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SCHED_GETSCHEDULER(3P)     POSIX Programmer's Manual    SCHED_GETSCHEDULER(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_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 unsuccess-
       ful, 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 Electri-
       cal  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.ker-
       nel.org/doc/man-pages/reporting_bugs.html .
IEEE/The Open Group                  2013               SCHED_GETSCHEDULER(3P)