The sched_getparam() function shall return the scheduling parameters of a
process specified by pid in the sched_param structure pointed to
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.
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.
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