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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
       IEEE Std 1003.1-2001, <sched.h>


       Portions of this text are reprinted and reproduced in electronic form from IEEE Std 1003.1, 2003 Edition,
       Standard  for  Information Technology -- Portable Operating System Interface (POSIX), The Open Group Base
       Specifications Issue 6, Copyright (C) 2001-2003 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 .