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.\"    may be used to endorse or promote products derived from this software
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.\"     @(#)getpriority.2	6.9 (Berkeley) 3/10/91
.\"
.\" Modified Sat Jul 24 16:33:19 1993 by Rik Faith <faith@cs.unc.edu>
.\" Modified Mon Jul  1 21:59:57 1996 by Andries Brouwer <aeb@cwi.nl>
.\" Modified Wed Nov  6 03:55:47 1996 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified, 21 Oct 01, Michael Kerrisk, <mtk16@ext.canterbury.ac.nz>
.\"    Corrected statement under EPERM to clarify privileges required
.\"
.\" Japanese Version Copyright (c) 1997 HANATAKA Shinya
.\"         all rights reserved.
.\" Translated Sat Feb 22 20:36:22 JST 1997
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified Fri Aug 17 20:05:21 JST 2001
.\"         by HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Modified Thu Oct 18 01:23:15 JST 2001
.\"         by Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated Thu Dec 13 JST 2001 by Kentaro Shirakata <argrath@ub32.org>
.\"
.\"WORD:	scheduling		塼
.\"WORD:	piority			ͥ
.\"WORD:	call			
.\"WORD:	user-ID			桼ID
.\"WORD:	process			ץ
.\"WORD:	user			桼
.\"WORD:	super user		ѡ桼
.\"WORD:	effective user-ID	¸桼ID
.\"WORD:	real user-ID		¥桼ID
.\"
.TH GETPRIORITY 2 2001-06-19 "BSD Man Page" "Linux Programmer's Manual"
.SH ̾
getpriority, setpriority \- ץΥ塼󥰤ͥ٤/ꤹ
.SH 
.B #include <sys/time.h>
.br
.B #include <sys/resource.h>
.sp
.BI "int getpriority(int " which ", int " who );
.br
.BI "int setpriority(int " which ", int " who ", int " prio );
.SH 
.I which

.I who
ǻꤵ줿ץץ롼ס桼
塼(scheduling)ͥ(priority)
.B getpriority
ϼ
.B setpriority
ꤹ롣
.I which

.BR PRIO_PROCESS ,
.BR PRIO_PGRP ,
.BR PRIO_USER ,
Τɤ줫Ĥǡ
.I who

.I which
˴Ϣ򤹤롣
(
.BR PRIO_PROCESS 
Ǥϥץꤹ롢
.BR PRIO_PGRP 
Ǥϥץ롼פꤹ롢
.BR PRIO_USER
Ǥϥ桼 ID ꤹ)
.I who
ʤСƤӽФץץ롼ס桼
̣롣
.I prio
 \-20  20 ϰϤͤǡǥեȤͥ٤ 0 Ǥ;
ʿۤɡͭʥ塼󥰤Ȥʤ롣

.B getpriority
ϻꤷץΤʤκǤ⤤ͥ(ŪˤϺǾ)֤
.B setpriority
ϻꤷץƤͥ٤ꤷͤꤹ롣
ѡ桼Τߤ㤤ͤǤ롣
.SH ֤
.B getpriority
ˤ \-1 ֤ͤǽΤǡ
ƤӽФ˳ѿ
.I errno
򥯥ꥢƤӽФθ֤ͤ \-1 ͤ
顼Ƚ̤ɬפ롣

顼ʤ
.B setpriority
 0 ֤顼 \-1 ֤

.SH 顼
.TP
.B ESRCH
.I which

.I who
ǻꤵ줿ץ¸ߤʤ
.TP
.B EINVAL
.I which

.BR PRIO_PROCESS ,
.BR PRIO_PGRP ,
.BR PRIO_USER
Τɤ줫Ǥʤ
.PP
嵭ΤΤ˲ä
.B setpriority
ǤϰʲΥ顼:
.TP
.B EPERM
ץϸĤäμ¸(effective)桼 ID 
ƤӽФμ¸桼 ID ޤϼ(real)桼 ID Ȱפʤ
.TP
.B EACCES
ѡ桼ʳץˤ㤤ͥͿ褦Ȥ
.SH 
EPERM ȯξܺ٤ϥƥ˰¸롣
嵭 SUSv3 ΤΤǤꡢƤ SYSV ƥ
˽äƤ褦Ǥ롣
Linux ǤϡƤӽФμ¥桼 ID ޤϼ¹ԥ桼 ID 
ץ \fIwho\fP (¹ԥ桼 ID Ǥʤ)
¥桼 ID ˰פɬפ롣
Ƥ BSD ƥ (SunOS 4.1.3, Ultrix 4.2,
BSD 4.3, FreeBSD 4.3, OpenBSD-2.5, ...) Ǥϡ
ƤӽФμ¸桼 ID ץ \fIwho\fP 
¥桼 ID ¸桼 ID Ȱפɬפ롣
.LP
ºݤͥ٤ͤϰϤϥͥΥСˤäưۤʤ롣
1.3.36  Linux Ǥϡͥ٤ϰϤ̵  15 Ǥ롣
1.3.43ʹߤ Linux Ǥϡͥ٤ϰϤ -20  19 Ǥꡢ
ƥॳ getpriority  40  1 ֤ͤ
(֤ͤϥ顼ɤȤʤ뤿)
饤֥꤬ƥॳ֤ N ͥ 20-N ؤѴԤ
.LP
ߤǤ
.I <sys/time.h>
򥤥󥯥롼ɤɬפϤʤܿ뤳ȤǤ롣
(ºݤˤ
.I <sys/resource.h>

.I rusage
¤ΤƤ뤬ΥեɤȤ
.I <sys/time.h>
Ƥ
.I struct timeval
ѤƤ롣)

.SH 
SVr4, 4.4BSD (δؿ BSD 4.2 ǻϤ˸줿)
.SH Ϣ
.BR nice (1),
.BR fork (2),
.BR renice (8)