SCHED_GETPARAM(3P)                                  POSIX Programmer's Manual                                 SCHED_GETPARAM(3P)



PROLOG
       This  manual  page is part of the POSIX Programmer's Manual.  The Linux implementation of this interface may differ (con-
       sult 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  unsuc-
       cessful, 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 IEEE Std 1003.1-2001,
       <sched.h>

COPYRIGHT
       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, Copy-
       right (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.open-
       group.org/unix/online.html .



IEEE/The Open Group                                           2003                                            SCHED_GETPARAM(3P)