.\" Hey Emacs! This file is -*- nroff -*- source.
.\"
.\" Copyright (c) 1992 Drew Eckhardt (drew@cs.colorado.edu), March 28, 1992
.\"
.\" Permission is granted to make and distribute verbatim copies of this
.\" manual provided the copyright notice and this permission notice are
.\" preserved on all copies.
.\"
.\" Permission is granted to copy and distribute modified versions of this
.\" manual under the conditions for verbatim copying, provided that the
.\" entire resulting derived work is distributed under the terms of a
.\" permission notice identical to this one.
.\" 
.\" Since the Linux kernel and libraries are constantly changing, this
.\" manual page may be incorrect or out-of-date.  The author(s) assume no
.\" responsibility for errors or omissions, or for damages resulting from
.\" the use of the information contained herein.  The author(s) may not
.\" have taken the same level of care in the production of this manual,
.\" which is licensed free of charge, as they might when working
.\" professionally.
.\" 
.\" Formatted or processed versions of this manual, if unaccompanied by
.\" the source, must acknowledge the copyright and authors of this work.
.\"
.\" Modified by Michael Haardt (michael@moria.de)
.\" Modified Sat Jul 24 14:29:17 1993 by Rik Faith (faith@cs.unc.edu)
.\" Modified 961203 and 001211 and 010326 by aeb@cwi.nl
.\" Modified 001213 by Michael Haardt (michael@moria.de)
.\" Modified 13 Jun 02, Michael Kerrisk <mtk-manpages@gmx.net>
.\"	Added note on non-standard behaviour when SIGCHLD is ignored.
.\" Modified 2004-11-16, mtk, Noted that the non-conformance when
.\"	SIGCHLD is being ignored is fixed in 2.6.9; other minor changes
.\" Modified 2004-12-08, mtk, in 2.6 times() return value changed
.\" 2005-04-13, mtk
.\"	Added notes on non-standard behaviour: Linux allows 'buf' to
.\"	be NULL, but POSIX.1 doesn't specify this and it's non-portable.
.\"
.\" Japanese Version Copyright (c) 1996 Satoshi Nozawa
.\"         all rights reserved.
.\" Translated 1996-06-25, Satoshi I. Nozawa <snozawa@env.sci.ibaraki.ac.jp>
.\" Modified 1997-12-14, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
.\" Updated 2001-02-16, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2001-04-10, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2001-05-21, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2002-10-21, Kentaro Shirakata <argrath@ub32.org>
.\" Updated 2005-02-24, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\" Updated 2005-04-20, Kentaro Shirakata <argrath@ub32.org>
.\"
.\" WORD:	clock ticks	å
.\"
.TH TIMES 2 2002-06-14 "Linux" "Linux Programmer's Manual"
.SH ̾
times - ץ֤
.SH 
.B #include <sys/times.h>
.sp
.BI "clock_t times(struct tms *" buf );
.SH 
.BR times ()
ϸߤΥץ֤
.I buf
ؤƤ
.B "struct tms"
˳Ǽ롣
.I struct tms

.I <sys/times.h>
ǰʲΤ褦Ƥ:
.sp
.nf
struct  tms  {
.RS
clock_t tms_utime;  /* user time */
clock_t tms_stime;  /* system time */
clock_t tms_cutime; /* user time of children */
clock_t tms_cstime; /* system time of children */
.RE
};
.fi
.LP
.I tms_utime
եɤϡƤӽФץ̿¹ԤΤ˾񤷤
CPU ֤Ǥ롣
.I tms_stime
եɤϡƤӽФץΤ˼¹Ԥ줿ǡ
ƥब񤷤 CPU ֤Ǥ롣
.I tms_cutime
եɤϡ
λԤäƤƤλҥץ
.I tms_utime

.I tms_cutime
ιפǤ롣
.I tms_cstime
եɤϡ
λԤäƤƤλҥץ
.I tms_stime

.I tms_cstime
ιפǤ롣
.LP
λ(ڤӤλ¹)ץλ֤
.BR wait (2)

.BR waitpid (2)
ץ ID ִ֤֤˲û롣
ĤޤꡢҤޤλԤäƤʤ֤Ǥ
¹ץλ֤Ϸ褷Ƹʤ
.LP
Ƥλ֤ϥå֤롣
.SH ֤
.BR times ()
ϲΤвᤷå (clock tick) ֤
Linux 2.4 ȤΥСǤϡΡ֤פȤ
ƥबưִ֤Ǥ롣
Linux 2.6 ϡΡ֤פϥƥ൯ư
\fI(2^32/HZ) \- 300\fP (褽 42900) Ȥʤ롣
֤ͤ
.I clock_t
ϰϤ饪Сե뤫⤷ʤ
顼ξ硢\fI(clock_t) \-1\fP ֤졢
.I errno
Ŭڤꤵ롣
.SH 
äΥå
.RS
sysconf(_SC_CLK_TCK);
.RE
Ȥä뤳Ȥ롣
POSIX-1996 ǤϡCLK_TCK ܥ
.RI ( <time.h>
Ƥ) ϸŤΤǤȵҤƤ롣
ǤϤϸŤΤǤ롣
.PP
Linux 2.6.9 ΥСǤϡ
.B SIGCHLD

.B SIG_IGN
ꤹ
λҥץβ
ưŪ
.I tms_cstime

.I tms_cutime
եɤ˴ޤޤ롣
POSIX.1-2001 ǤϡưϸƤӽФ
.BR wait ()
ؿǻҥץԤäˤΤߵ٤ȤƤ롣
ɸȤϰۤʤ뤳ư Linux 2.6.9 ʹߤǽƤ롣
.\" See the description of times() in XSH, which says:
.\"	The times of a terminated child process are included... when wait()
.\"	or waitpid() returns the process ID of this terminated child.

Linux Ǥϡ
.I buf
 NULL ꤹ뤳ȤǤξ
.BR times ()
ñ˴ؿη̤֤
POSIX Ϥο񤤤ϵꤵƤ餺
¾ΤۤȤɤ Unix 
.I buf
ͤȤ NULL ͤ׵᤹롣
.LP
.BR clock (3)

.I clock_t
֤ͤϥåǤϤʤ
.B CLOCKS_PER_SEC
ñ̤Ǥդ뤳ȡ
.SH 
SVr4, 4.3BSD, POSIX.1-2001.
.SH 
SVr1-3 Ǥ
.I long
֤¤ΤΥФ
.I time_t
ȤäƤÿǤϤʤåǼƤ
V7 ǤϹ¤ΤΥФ
.I long
ȤäƤޤ
.I time_t
ʤäǤ롣
.PP
ŤƥǤϰäΥå HZ ѿͿ롣
.SH Ϣ
.BR time (1),
.BR getrusage (2),
.BR wait (2),
.BR clock (3),
.BR sysconf (3),
.BR time (7)