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>

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, 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 .