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.TH SCHED_GETPARAM "3P" 2013 "IEEE/The Open Group" "POSIX Programmer's Manual"
.SH PROLOG
This manual page is part of the POSIX Programmer's Manual.
The Linux implementation of this interface may differ (consult
the corresponding Linux manual page for details of Linux behavior),
or the interface may not be implemented on Linux.

.SH NAME
sched_getparam
\(em get scheduling parameters
(\fBREALTIME\fP)
.SH SYNOPSIS
.LP
.nf
#include <sched.h>
.P
int sched_getparam(pid_t \fIpid\fP, struct sched_param *\fIparam\fP);
.fi
.SH DESCRIPTION
The
\fIsched_getparam\fR()
function shall return the scheduling parameters of a process specified by
.IR pid
in the
.BR sched_param
structure pointed to by
.IR param .
.P
If a process specified by
.IR pid
exists, and if the calling process has permission, the scheduling
parameters for the process whose process ID is equal to
.IR pid
shall be returned.
.P
If
.IR pid
is zero, the scheduling parameters for the calling process shall be
returned. The behavior of the
\fIsched_getparam\fR()
function is unspecified if the value of
.IR pid
is negative.
.SH "RETURN VALUE"
Upon successful completion, the
\fIsched_getparam\fR()
function shall return zero. If the call to
\fIsched_getparam\fR()
is unsuccessful, the function shall return a value of \(mi1 and set
.IR errno
to indicate the error.
.SH ERRORS
The
\fIsched_getparam\fR()
function shall fail if:
.TP
.BR EPERM
The requesting process does not have permission to obtain the
scheduling parameters of the specified process.
.TP
.BR ESRCH
No process can be found corresponding to that specified by
.IR pid .
.LP
.IR "The following sections are informative."
.SH EXAMPLES
None.
.SH "APPLICATION USAGE"
None.
.SH RATIONALE
None.
.SH "FUTURE DIRECTIONS"
None.
.SH "SEE ALSO"
.IR "\fIsched_getscheduler\fR\^(\|)",
.IR "\fIsched_setparam\fR\^(\|)",
.IR "\fIsched_setscheduler\fR\^(\|)"
.P
The Base Definitions volume of POSIX.1\(hy2008,
.IR "\fB<sched.h>\fP"
.SH COPYRIGHT
Portions of this text are reprinted and reproduced in electronic form
from IEEE Std 1003.1, 2013 Edition, Standard for Information Technology
-- Portable Operating System Interface (POSIX), The Open Group Base
Specifications Issue 7, Copyright (C) 2013 by the Institute of
Electrical and Electronics Engineers, Inc and The Open Group.
(This is POSIX.1-2008 with the 2013 Technical Corrigendum 1 applied.) 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.unix.org/online.html .

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