(split) Move Japanese translation histories after original history sections.

[linuxjm/LDP_man-pages.git] / draft / man5 / tzfile.5

.\" @(#)tzfile.5        7.11
.\" This file is in the public domain, so clarified as of
.\" 1996-06-05 by Arthur David Olson <arthur_david_olson@nih.gov>.
.\"
.\" Japanese Version Copyright (c) 1999 NAKANO Takeo all rights reserved.
.\" Translated Tue Sep 14 1999 by NAKANO Takeo <nakano@apm.seikei.ac.jp>
.\" 
.\"WORD:        transition time         Á«°Ü»þ´Ö
.\"WORD:        local time types        ¥í¡¼¥«¥ë»þ´Ö·¿
.\"WORD:        timezone abbreviatio strint     ¥¿¥¤¥à¥¾¡¼¥óά¼°Ê¸»úÎó
.\"
.TH TZFILE 5 1996-06-05 "" "Linux Programmer's Manual"
.\"O .SH NAME
.\"O tzfile \- timezone information
.\"O .SH SYNOPSIS
.SH ̾Á°
tzfile \- ¥¿¥¤¥à¥¾¡¼¥ó¤Î¾ðÊó
.SH ½ñ¼°
.B #include <tzfile.h>
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O The timezone information files used by
.\"O .BR tzset (3)
.\"O begin with the magic characters "TZif" to identify then as
.\"O timezone information files,
.\"O followed by sixteen bytes reserved for future use,
.\"O followed by six four-byte values of type
.\"O .IR long ,
.\"O written in a "standard" byte order
.\"O (the high-order byte of the value is written first).
.\"O These values are,
.\"O in order:
.BR tzset (3)
¤Ë¤è¤Ã¤ÆÍѤ¤¤é¤ì¤ë¥¿¥¤¥à¥¾¡¼¥ó¾ðÊó¤Î¥Õ¥¡¥¤¥ë¤Ï¡¢
¼±Ê̤Τ¿¤á¤Î magic ʸ»úÎó "TZif" ¤Ç»Ï¤Þ¤ê¡¢
¾­Íè¤Î¤¿¤á¤Î 16 ¥Ð¥¤¥È¤ÎͽÌóÎΰ褬³¤­¡¢
.I long
·¿¤Î 4 ¥Ð¥¤¥È¤ÎÃͤ¬ 6 ¸Ä³¤¯¡£
¤³¤ÎÃͤϡÖɸ½à¡×¥Ð¥¤¥È¥ª¡¼¥À¡¼ (¹â°Ì¥Ð¥¤¥È¤¬Àè¤Ë½ñ¤«¤ì¤ë)
¤Çµ­½Ò¤µ¤ì¤ë¡£¤³¤ì¤é¤ÎÃͤϡ¢½ç¤Ë°Ê²¼¤Î¤è¤¦¤Ê¤â¤Î¤Ç¤¢¤ë¡£
.TP
.I tzh_ttisgmtcnt
.\"O The number of UTC/local indicators stored in the file.
¥Õ¥¡¥¤¥ë¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤ë UTC/local ¥¤¥ó¥¸¥±¡¼¥¿ (indicator) ¤Î¸Ä¿ô¡£
.TP
.I tzh_ttisstdcnt
.\"O The number of standard/wall indicators stored in the file.
¥Õ¥¡¥¤¥ë¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤ë standard/wall ¥¤¥ó¥¸¥±¡¼¥¿¤Î¸Ä¿ô¡£
.TP
.I tzh_leapcnt
.\"O The number of leap seconds for which data is stored in the file.
¥Õ¥¡¥¤¥ë¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤ë±¼Éåǡ¼¥¿¤Î¸Ä¿ô¡£
.TP
.I tzh_timecnt
.\"O The number of "transition times" for which data is stored
.\"O in the file.
¥Õ¥¡¥¤¥ë¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤ë¡ÖÁ«°Ü»þ´Ö (transition time)¡×¥Ç¡¼¥¿¤Î¸Ä¿ô¡£
.TP
.I tzh_typecnt
.\"O The number of "local time types" for which data is stored
.\"O in the file (must not be zero).
¥Õ¥¡¥¤¥ë¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤ë¡Ö¥í¡¼¥«¥ë»þ´Ö·¿ (local time types)¡×¥Ç¡¼¥¿¤Î¸Ä¿ô
(0 ¤Ç¤¢¤Ã¤Æ¤Ï¤¤¤±¤Ê¤¤)¡£
.TP
.I tzh_charcnt
.\"O The number of characters of "timezone abbreviation strings"
.\"O stored in the file.
¥Õ¥¡¥¤¥ë¤Ëµ­½Ò¤µ¤ì¤Æ¤¤¤ë¡Ö¥¿¥¤¥à¥¾¡¼¥óά¼°Ê¸»úÎó (timezone
abbreviation string)¡×¤Î¸Ä¿ô¡£
.PP
.\"O The above header is followed by
.\"O .I tzh_timecnt
.\"O four-byte values of type
.\"O .IR long ,
.\"O sorted in ascending order.
.\"O These values are written in "standard" byte order.
.\"O Each is used as a transition time (as returned by
.\"O .BR time (2))
.\"O at which the rules for computing local time change.
¾åµ­¤Î¥Ø¥Ã¥À¤Ë³¤¤¤Æ
.I tzh_timecnt
¤È¤¤¤¦ 4 ¥Ð¥¤¥È¤Î
.I long
·¿¤ÎÃͤ¬ (Ê£¿ô¸Ä) ³¤¯¡£¾º½ç¤ÇÊݴɤµ¤ì¤Æ¤¤¤ë¡£
¤³¤ì¤é¤ÎÃͤϡÖɸ½à¡×¥Ð¥¤¥È¥ª¡¼¥À¡¼¤Çµ­½Ò¤µ¤ì¤Æ¤¤¤ë¡£
¤½¤ì¤¾¤ì¤ÏÁ«°Ü»þ´Ö
.RB ( time (2)
¤¬ÊÖ¤¹ÃÍ) ¤È¤·¤ÆÍѤ¤¤é¤ì¡¢
¤½¤ì¤¾¤ì¤Ë¤ª¤¤¤Æ¥í¡¼¥«¥ë»þ´Ö¤Î·×»»¥ë¡¼¥ë¤¬Êѹ¹¤µ¤ì¤ë¡£
.\"O Next come
.\"O .I tzh_timecnt
.\"O one-byte values of type
.\"O .IR "unsigned char" ;
.\"O each one tells which of the different types of "local time" types
.\"O described in the file is associated with the same-indexed transition time.
.\"O These values serve as indices into an array of
.\"O .I ttinfo
.\"O structures that appears next in the file;
¼¡¤ËÍè¤ë¤Î¤Ï
.I tzh_timecnt
¤Ç¡¢¤³¤ì¤Ï
.I "unsigned char"
·¿¤Î 1 ¥Ð¥¤¥È¤ÎÃͤǤ¢¤ë (Ê£¿ô¸Ä³¤¯¤³¤È¤â¤¢¤ë)¡£
¤³¤ÎÃͤϡ¢¥Õ¥¡¥¤¥ë¤Çµ­½Ò¤µ¤ì¤Æ¤¤¤ë°Û¤Ê¤Ã¤¿¥¿¥¤¥×¤Î¡Ö¥í¡¼¥«¥ë»þ´Ö¡×¤¬¡¢
¤½¤ì¤¾¤ìƱ¤¸¤è¤¦¤Ë¥¤¥ó¥Ç¥Ã¥¯¥¹¤µ¤ì¤¿Á«°Ü»þ´Ö¤Î¤É¤ì¤Ë´ØÏ¢¤Å¤±¤é¤ì¤Æ
¤¤¤ë¤«¤ò¼¨¤¹¡£
¤³¤ì¤é¤ÎÃͤÏ
.I ttinifo
¹½Â¤ÂΤÎÇÛÎó¤ËÂФ¹¤ë¥¤¥ó¥Ç¥Ã¥¯¥¹¤È¤·¤ÆÄ󶡤µ¤ì¤Æ¤¤¤ë¡£
.I ttinfo
¹½Â¤ÂΤϥե¡¥¤¥ëÃæ¤Ç¼¡¤Î°ÌÃÖ¤ËÃÖ¤«¤ì¤ë¡£
.\"O these structures are defined as follows:
¤³¤Î¹½Â¤ÂΤϰʲ¼¤Î¤è¤¦¤ËÄêµÁ¤µ¤ì¤Æ¤¤¤ë:
.in +4n
.sp
.nf
struct ttinfo {
    long         tt_gmtoff;
    int          tt_isdst;
    unsigned int tt_abbrind;
};
.in
.fi
.sp
.\"O Each structure is written as a four-byte value for
.\"O .I tt_gmtoff
.\"O of type
.\"O .B long ,
.\"O in a standard byte order, followed by a one-byte value for
.\"O .I tt_isdst
.\"O and a one-byte value for
.\"O .IR tt_abbrind .
¤½¤ì¤¾¤ì¤Î¹½Â¤ÂΤϡ¢ 4 ¥Ð¥¤¥È¤Î \fIlong\fP ·¿¤ÎÃÍ \fItt_gmtoff\fP¡¢
1 ¥Ð¥¤¥È¤ÎÃÍ \fItt_isdst\fP,
1 ¥Ð¥¤¥È¤ÎÃÍ \fItt_abbrind\fP ¤«¤é¹½À®¤µ¤ì¤ë¡£
.\"NAKANO int ¤Ê¤Î¤Ë 4 ¥Ð¥¤¥È¤Ê¤Î¡© 
.\"O In each structure,
.\"O .I tt_gmtoff
.\"O gives the number of seconds to be added to UTC,
.\"O .I tt_isdst
.\"O tells whether
.\"O .I tm_isdst
.\"O should be set by
.\"O .BR localtime (3),
.\"O and
.\"O .I tt_abbrind
.\"O serves as an index into the array of timezone abbreviation characters
.\"O that follow the
.\"O .I ttinfo
.\"O structure(s) in the file.
¤½¤ì¤¾¤ì¤Î¹½Â¤ÂΤˤª¤¤¤Æ¡¢
.I tt_gmtoff
¤Ï UTC ¤Ë²Ã¤¨¤ë¤Ù¤­Éÿô¤òÍ¿¤¨¡¢
.I tt_isdst
¤Ï
.I tm_isdst
¤ò
.BR localtime (3)
¤Ë¥»¥Ã¥È¤¹¤Ù¤­¤«¤É¤¦¤«¤ò¼¨¤·¡¢
.I tt_abbrind
¤Ï¥Õ¥¡¥¤¥ëÃæ¤Ç \fIttinfo\fP ¹½Â¤ÂÎ (ÇÛÎó) ¤Î¤¢¤È¤ËÃÖ¤«¤ì¤ë
¥¿¥¤¥à¥¾¡¼¥óά¼°Ê¸»úÎó¤ÎÇÛÎó¤ËÂФ¹¤ë¥¤¥ó¥Ç¥Ã¥¯¥¹¤Ç¤¢¤ë¡£
.PP
.\"O Then there are
.\"O .I tzh_leapcnt
.\"O pairs of four-byte values, written in standard byte order;
.\"O the first value of each pair gives the time
.\"O (as returned by
.\"O .IR time(2))
.\"O at which a leap second occurs;
.\"O the second gives the
.\"O .I total
.\"O number of leap seconds to be applied after the given time.
.\"O The pairs of values are sorted in ascending order by time.
¼¡¤Ë¤Ï 4 ¥Ð¥¤¥ÈÃͤΥڥ¢¤Ç¤¢¤ë
.I tzh_leapcnt
¤¬ (Ê£¿ô¸Ä) ³¤¯¡£É¸½à¥Ð¥¤¥È¥ª¡¼¥À¡¼¤Çµ­½Ò¤µ¤ì¤ë¡£
¤½¤ì¤¾¤ì¤Î¥Ú¥¢¤ÎºÇ½é¤ÎÃͤϱ¼Éäε¯¤­¤¿»þ¹ï¤ò (
.IR time (2)
¤ÎÊÖ¤¹·Á¼°¤Ç) Í¿¤¨¡¢ÆóÈÖÌܤÎÃͤϤ½¤Î»þ¹ï¤Ë²Ã¤¨¤ë¤Ù¤­±¼Éÿô¤Î
Á´Éÿô¤òÍ¿¤¨¤ë¡£¤³¤ì¤é¤Î¥Ú¥¢¤Ï»þ¹ï¤Î¸Å¤¤½ç¤Ëµ­½Ò¤¹¤ë¡£
.PP
.\"O Then there are
.\"O .I tzh_ttisstdcnt
.\"O standard/wall indicators, each stored as a one-byte value;
.\"O they tell whether the transition times associated with local time types
.\"O were specified as standard time or wall clock time,
.\"O and are used when a timezone file is used in handling POSIX-style
.\"O timezone environment variables.
¼¡¤Ë¤Ï
.I tzh_ttisstdcnt
¤¬ÃÖ¤«¤ì¤ë¡£¤³¤ì¤Ï standard/wall ¥¤¥ó¥¸¥±¡¼¥¿¤Ç¡¢¤½¤ì¤¾¤ì 1 ¥Ð¥¤¥È¤Î
ÃͤòÊݴɤ¹¤ë¡£¤³¤ì¤é¤Ï¥í¡¼¥«¥ë»þ´Ö¤Î¥¿¥¤¥×¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿Á«°Ü»þ´Ö¤¬
ɸ½à»þ¹ï (standard time) ¤ÈÊÉ»þ·×»þ¹ï (wall clock time) ¤Î
¤É¤Á¤é¤Ç»ØÄꤵ¤ì¤Æ¤¤¤ë¤«¤ò¼¨¤¹¡£¤Þ¤¿¤³¤ÎÃͤϡ¢
POSIX ¥¹¥¿¥¤¥ë¤Î¥¿¥¤¥à¥¾¡¼¥ó´Ä¶­ÊÑ¿ô¤ò½èÍý¤¹¤ë¤È¤­¤Ë
¥¿¥¤¥à¥¾¡¼¥ó¥Õ¥¡¥¤¥ë¤¬»È¤ï¤ì¤ë¤È¤­¤Ë¤âÍøÍѤµ¤ì¤ë¡£
.PP
.\"O Finally, there are
.\"O .I tzh_ttisgmtcnt
.\"O UTC/local indicators, each stored as a one-byte value;
.\"O they tell whether the transition times associated with local time types
.\"O were specified as UTC or local time,
.\"O and are used when a timezone file is used in handling POSIX-style
.\"O timezone environment variables.
ºÇ¸å¤Ë
.I tzh_ttisgmtcnt
¤¬ÃÖ¤«¤ì¤ë¡£¤³¤ì¤Ï UTC/local ¥¤¥ó¥¸¥±¡¼¥¿¤Ç¡¢¤½¤ì¤¾¤ì 1 ¥Ð¥¤¥È¤Î
ÃͤòÊݴɤ¹¤ë¡£¤³¤ì¤é¤Ï¥í¡¼¥«¥ë»þ´Ö¤Î¥¿¥¤¥×¤Ë´ØÏ¢¤Å¤±¤é¤ì¤¿Á«°Ü»þ´Ö¤¬
UTC ¤È¥í¡¼¥«¥ë»þ¹ï¤Î¤É¤Á¤é¤Ç»ØÄꤵ¤ì¤Æ¤¤¤ë¤«¤ò¼¨¤¹¡£¤Þ¤¿¤³¤ÎÃͤϡ¢
POSIX ¥¹¥¿¥¤¥ë¤Î¥¿¥¤¥à¥¾¡¼¥ó´Ä¶­ÊÑ¿ô¤ò½èÍý¤¹¤ë¤È¤­¤Ë
¥¿¥¤¥à¥¾¡¼¥ó¥Õ¥¡¥¤¥ë¤¬»È¤ï¤ì¤ë¤È¤­¤Ë¤âÍøÍѤµ¤ì¤ë¡£
.PP
.\"O .I Localtime
.\"O uses the first standard-time
.\"O .I ttinfo
.\"O structure in the file
.\"O (or simply the first
.\"O .I ttinfo
.\"O structure in the absence of a standard-time structure)
.\"O if either
.\"O .I tzh_timecnt
.\"O is zero or the time argument is less than the first transition time recorded
.\"O in the file.
.I localtime
¤Ï¡¢
.I tzh_timeout
¤¬ 0 ¤Ç¤¢¤ë¤« time °ú¿ô¤¬¥Õ¥¡¥¤¥ë¤Ëµ­Ï¿¤µ¤ì¤Æ¤¤¤¿ºÇ½é¤ÎÁ«°Ü»þ¹ï
¤è¤ê¤â¾®¤µ¤¤¾ì¹ç¤Ë¤Ï¡¢
¥Õ¥¡¥¤¥ë¤ËºÇ½é¤Ë¸½¤ì¤ëɸ½à»þ¹ï¤Î
.I ttinfo
¹½Â¤ÂΤò»È¤¦ (¤Þ¤¿¤Ïɸ½à»þ¹ï¤Î¹½Â¤ÂΤ¬¤Ê¤¤¾ì¹ç¤Ï¡¢Ã±¤ËºÇ½é¤Î
.I ttinfo
¹½Â¤ÂΤò»È¤¦)¡£