sched_getparam(3p)
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 .