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+.\" Hey Emacs! This file is -*- nroff -*- source.
+.\"
+.\" Copyright (C) Tom Bjorkholm & Markus Kuhn, 1996
+.\"
+.\" This is free documentation; you can redistribute it and/or
+.\" modify it under the terms of the GNU General Public License as
+.\" published by the Free Software Foundation; either version 2 of
+.\" the License, or (at your option) any later version.
+.\"
+.\" The GNU General Public License's references to "object code"
+.\" and "executables" are to be interpreted as the output of any
+.\" document formatting or typesetting system, including
+.\" intermediate and printed output.
+.\"
+.\" This manual is distributed in the hope that it will be useful,
+.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
+.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+.\" GNU General Public License for more details.
+.\"
+.\" You should have received a copy of the GNU General Public
+.\" License along with this manual; if not, write to the Free
+.\" Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111,
+.\" USA.
+.\"
+.\" 1996-04-01 Tom Bjorkholm <tomb@mydata.se>
+.\"            First version written
+.\" 1996-04-10 Markus Kuhn <mskuhn@cip.informatik.uni-erlangen.de>
+.\"            revision
+.\"
+.TH GET_PRIORITY_MAX 2 1996-04-10 "Linux 1.3.81" "Linux Programmer's Manual"
+.SH NAME
+sched_get_priority_max, sched_get_priority_min  \- get static priority range
+.SH SYNOPSIS
+.B #include <sched.h>
+.sp
+\fBint sched_get_priority_max(int \fIpolicy\fB);
+.sp
+\fBint sched_get_priority_min(int \fIpolicy\fB);
+.fi
+.SH DESCRIPTION
+.B sched_get_priority_max 
+returns the maximum priority value that can be used with the
+scheduling algorithm identified by \fIpolicy\fR.
+.B sched_get_priority_min 
+returns the minimum priority value that can be used with the
+scheduling algorithm identified by \fIpolicy\fR. Supported \fIpolicy\fR 
+values are
+.IR SCHED_FIFO , 
+.IR SCHED_RR ,
+and 
+.IR SCHED_OTHER .
+
+Processes with numerically higher priority values are scheduled before
+processes with numerically lower priority values. Thus, the value
+returned by \fBsched_get_priority_max\fR will be greater than the
+value returned by \fBsched_get_priority_min\fR.
+
+Linux allows the static priority value range 1 to 99 for
+\fISCHED_FIFO\fR and \fISCHED_RR\fR and the priority 0 for
+\fISCHED_OTHER\fR. Scheduling priority ranges for the various policies
+are not alterable.
+
+The range of scheduling priorities may vary on other POSIX systems,
+thus it is a good idea for portable applications to use a virtual
+priority range and map it to the interval given by
+\fBsched_get_priority_max\fR and \fBsched_get_priority_min\fR.
+POSIX.1b requires a spread of at least 32 between the maximum and the
+minimum values for \fISCHED_FIFO\fR and \fISCHED_RR\fR.
+
+POSIX systems on which
+.B sched_get_priority_max
+and
+.B sched_get_priority_min
+are available define
+.I _POSIX_PRIORITY_SCHEDULING
+in <unistd.h>.
+
+.SH "RETURN VALUE"
+On success,
+.B sched_get_priority_max
+and
+.B sched_get_priority_min
+return the maximum/minimum priority value for the named scheduling
+policy.
+On error, \-1 is returned,
+.I errno
+is set appropriately.
+.SH ERRORS
+.TP
+.B EINVAL
+The parameter \fIpolicy\fR does not identify a defined scheduling policy.
+.SH "CONFORMING TO"
+POSIX.1b (formerly POSIX.4)
+.SH "SEE ALSO"
+.BR sched_getaffinity (2),
+.BR sched_getparam (2),
+.BR sched_getscheduler (2),
+.BR sched_setaffinity (2),
+.BR sched_setparam (2),
+.BR sched_setscheduler (2)
+.PP
+.BR sched_setscheduler (2)
+has a description of the Linux scheduling scheme.
+.PP
+.I Programming for the real world \- POSIX.4
+by Bill O. Gallmeister, O'Reilly & Associates, Inc., ISBN 1-56592-074-0
+.br
+.I IEEE Std 1003.1b-1993
+(POSIX.1b standard)
+.br
+.I ISO/IEC 9945-1:1996