[linuxjm/LDP_man-pages.git] / release / man2 / nice.2

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.\" Copyright (c) 1992 Drew Eckhardt <drew@cs.colorado.edu>, March 28, 1992
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.\" Modified by Michael Haardt <michael@moria.de>
.\" Modified 1993-07-24 by Rik Faith <faith@cs.unc.edu>
.\" Modified 1996-11-04 by Eric S. Raymond <esr@thyrsus.com>
.\" Modified 2001-06-04 by aeb
.\" Modified 2004-05-27 by Michael Kerrisk <mtk.manpages@gmail.com>
.\"
.\" Japanese Version Copyright (c) 1997 SUTO, Mitsuaki
.\"         all rights reserved.
.\" Translated 1997-06-26, SUTO, Mitsuaki <suto@av.crl.sony.co.jp>
.\" Updated 2001-06-25, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2005-09-03, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2005-10-07, Akihiro MOTOKI
.\"
.TH NICE 2 2007-07-26 "Linux" "Linux Programmer's Manual"
.SH ̾Á°
nice \- ¥×¥í¥»¥¹¤ÎÍ¥ÀèÅÙ¤òÊѹ¹¤¹¤ë
.SH ½ñ¼°
.B #include <unistd.h>
.sp
.BI "int nice(int " inc );
.sp
.in -4n
glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
.RB ( feature_test_macros (7)
»²¾È):
.in
.sp
.BR nice ():
_BSD_SOURCE || _SVID_SOURCE || _XOPEN_SOURCE
.SH ÀâÌÀ
.BR nice ()
¤Ï
.I inc
¤ÎÃͤò
.B nice
¤ò¸Æ¤ó¤À¥×¥í¥»¥¹¤Î nice Ãͤ˲䨤ë
(nice Ãͤ¬Â礭¤¤¿ôÃͤۤÉÄ㤤ͥÀèÅÙ¤òɽ¤¹)¡£
Éé¤Î¿ô¤ò»ØÄꤹ¤ë¡¢¤Ä¤Þ¤ê¡¢°ÊÁ°¤è¤ê¤âÍ¥ÀèÅÙ¤ò¾å¤²¤ë¤È¤¤¤¦»ØÄ꤬¤Ç¤­¤ë¤Î¤Ï
¥¹¡¼¥Ñ¡¼¥æ¡¼¥¶¡¼¤À¤±¤Ç¤¢¤ë¡£
nice ÃͤÎÈϰϤˤĤ¤¤Æ¤Ï
.BR getpriority (2)
¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë¡£
.SH ÊÖ¤êÃÍ
À®¸ù¤·¤¿¾ì¹ç¡¢¿·¤·¤¤ nice Ãͤ¬ÊÖ¤ë (⤷¡¢²¼µ­¤Î¡ÖÃí°Õ¡×¤ò»²¾È)¡£
¼ºÇÔ¤·¤¿¾ì¹ç \-1 ¤¬Ê֤ꡢ
.I errno
¤¬¥¨¥é¡¼¤ÎÆâÍƤ˽¾¤Ã¤ÆÀßÄꤵ¤ì¤ë¡£
.SH ¥¨¥é¡¼
.TP
.B EPERM
¥¹¡¼¥Ñ¡¼¥æ¡¼¥¶¡¼°Ê³°¤¬
.I inc
¤ËÉé¤Î¿ôÃͤò»ØÄꤷ¤ÆÍ¥ÀèÅÙ¤ò¾å¤²¤è¤¦¤È¤·¤¿¡£
¸Æ¤Ó½Ð¤·¸µ¤Î¥×¥í¥»¥¹¤¬
.I inc
¤ËÉé¤Î¿ôÃͤò»ØÄꤷ¤ÆÍ¥ÀèÅÙ¤ò¾å¤²¤è¤¦¤È¤·¤¿¤¬¡¢
½½Ê¬¤Ê¸¢¸Â¤ò»ý¤Ã¤Æ¤¤¤Ê¤«¤Ã¤¿¡£
Linux ¤Ç¤Ï
.B CAP_SYS_NICE
¥±¡¼¥Ñ¥Ó¥ê¥Æ¥£¤¬É¬ÍפǤ¢¤ë¡£
.RB ( setrlimit (2)
¤Î¥ê¥½¡¼¥¹¾å¸Â
.B RLIMIT_NICE
¤Ë´Ø¤¹¤ëµÄÏÀ¤â»²¾È¤Î¤³¤È)¡£
.SH ½àµò
SVr4, 4.3BSD, POSIX.1-2001.
¤·¤«¤·¡¢Linux ¤È (2.2.4¤è¤ê¸Å¤¤) (g)libc ¤Ç¤ÏÊÖ¤êÃͤÏɸ½à¤È°Û¤Ê¤ë¡£
¾ÜºÙ¤Ï°Ê²¼¤ò»²¾È¤Î¤³¤È¡£
SVr4 ¤Ë¤Ï¾¤Ë
.B EINVAL
¥¨¥é¡¼¥³¡¼¥É¤Ë¤Ä¤¤¤Æ¤Îµ­½Ò¤¬¤¢¤ë¡£
.SH Ãí°Õ
SUSv2 ¤È POSIX 1003.1-2003 ¤Ç¤Ï¡¢
.BR nice ()
¤Ï¿·¤·¤¤ nice ÃͤòÊÖ¤¹¤Èµ¬Äꤵ¤ì¤Æ¤¤¤ë¡£
°ìÊý¡¢Linux ¥·¥¹¥Æ¥à¥³¡¼¥ë¤È (2.2.4 ¤è¤ê¸Å¤¤) (g)libc ¥é¥¤¥Ö¥é¥ê´Ø¿ô¤Ï
À®¸ù»þ¤Ë 0 ¤òÊÖ¤¹¡£¿·¤·¤¤ nice ÃͤÏ
.BR getpriority (2)
¤ò»È¤Ã¤Æ¼èÆÀ¤Ç¤­¤ë¡£

glibc 2.2.4 °Ê¹ß¤Ç¤Ï¡¢
.BR nice ()
¤Ï
.BR getpriority (2)
¤ò¸Æ¤Ó½Ð¤¹¥é¥¤¥Ö¥é¥ê´Ø¿ô¤È¤·¤Æ¼ÂÁõ¤µ¤ì¤Æ¤ª¤ê¡¢
¸Æ¤Ó½Ð¤·¸µ¤ËÊÖ¤¹¿·¤·¤¤ nice Ãͤò
.BR getpriority (2)
¤ò¸Æ¤Ó½Ð¤·¤Æ¼èÆÀ¤¹¤ë¤è¤¦¤Ë¤Ê¤Ã¤Æ¤¤¤ë¡£
¤³¤Î¼ÂÁõ¤Ç¤Ï¡¢Àµ¾ï¤ÊÆ°ºî¤Ç¤â \-1 ¤¬ÊÖ¤µ¤ì¤ë²ÄǽÀ­¤¬¤¢¤ë¡£
³Î¼Â¤Ë¥¨¥é¡¼¤ò¸¡½Ð¤¹¤ë¤¿¤á¤Ë¤Ï¡¢
¸Æ¤Ó½Ð¤·¤ÎÁ°¤Ë
.I errno
¤Ë 0 ¤òÀßÄꤷ¡¢
.BR nice ()
¤¬ \-1 ¤òÊÖ¤·¤¿¤È¤­¤Ë errno ¤ò¥Á¥§¥Ã¥¯¤¹¤ë¤ÈÎɤ¤¡£
.SH ´ØÏ¢¹àÌÜ
.BR nice (1),
.BR fork (2),
.BR getpriority (2),
.BR setpriority (2),
.BR capabilities (7),
.BR renice (1)