trusty (3) sched_getparam.3posix.gz

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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
       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 .