1 .\" Copyright 1993 David Metcalfe (david@prism.demon.co.uk)
3 .\" Permission is granted to make and distribute verbatim copies of this
4 .\" manual provided the copyright notice and this permission notice are
5 .\" preserved on all copies.
7 .\" Permission is granted to copy and distribute modified versions of this
8 .\" manual under the conditions for verbatim copying, provided that the
9 .\" entire resulting derived work is distributed under the terms of a
10 .\" permission notice identical to this one.
12 .\" Since the Linux kernel and libraries are constantly changing, this
13 .\" manual page may be incorrect or out-of-date. The author(s) assume no
14 .\" responsibility for errors or omissions, or for damages resulting from
15 .\" the use of the information contained herein. The author(s) may not
16 .\" have taken the same level of care in the production of this manual,
17 .\" which is licensed free of charge, as they might when working
20 .\" Formatted or processed versions of this manual, if unaccompanied by
21 .\" the source, must acknowledge the copyright and authors of this work.
23 .\" References consulted:
24 .\" Linux libc source code
25 .\" Lewine's _POSIX Programmer's Guide_ (O'Reilly & Associates, 1991)
27 .\" GNU texinfo documentation on glibc date/time functions.
28 .\" Modified Sat Jul 24 18:03:44 1993 by Rik Faith (faith@cs.unc.edu)
29 .\" Applied fix by Wolfgang Franke, aeb, 961011
30 .\" Corrected return value, aeb, 970307
31 .\" Added Single UNIX Spec conversions and %z, aeb/esr, 990329.
32 .\" 2005-11-22 mtk, added Glibc Notes covering optional 'flag' and
33 .\" 'width' components of conversion specifications.
35 .\" Japanese Version Copyright (c) 2000 HANATAKA Shinya
36 .\" all rights reserved.
37 .\" Translated 2000-10-10, HANATAKA Shinya <hanataka@abyss.rim.or.jp>
38 .\" Updated 2002-01-09, Kentaro Shirakata <argrath@ub32.org>
39 .\" Updated 2002-01-14, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
40 .\" Updated 2005-02-26, Akihiro MOTOKI
41 .\" Updated 2005-04-17, Akihiro MOTOKI
42 .\" Updated 2005-12-05, Akihiro MOTOKI, LDP v2.16
43 .\" Updated 2010-04-18, Akihiro MOTOKI, LDP v3.24
45 .\"WORD: conversion specifier ÊÑ´¹»ØÄêʸ»ú
46 .\"WORD: conversion specification ÊÑ´¹»ØÄê
47 .\"WORD: modifier ½¤¾þ»Ò
48 .\"WORD: broken-down time Í×ÁÇÊ̤Î(»þ¹ï)
49 .\"WORD: Single UNIX Specification Åý°ì UNIX µ¬³Ê
50 .\"WORD: ISO\ 8601 week-based ISO\ 8601 ¤Î½µÃ±°Ìɽµ
52 .TH STRFTIME 3 2010-01-17 "GNU" "Linux Programmer's Manual"
54 strftime \- ÆüÉÕ¤ª¤è¤Ó»þ¹ï¤Îʸ»úÎó¤Ø¤ÎÊÑ´¹
59 .BI "size_t strftime(char *" s ", size_t " max ", const char *" format ,
60 .BI " const struct tm *" tm );
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67 .\" FIXME POSIX says: Local timezone information is used as though
68 .\" strftime() called tzset(). But this doesn't appear to be the case
70 ½ñ¼°»ØÄê¤Ï NULL ½ªÃ¼¤µ¤ì¤¿Ê¸»úÎó¤Ç¤¢¤ê¡¢
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444 my_strftime(char *s, size_t max, const char *fmt,
447 return strftime(s, max, fmt, tm);
455 ¤Ï¤³¤Î·Ù¹ð¤òÍÞ¤¨¤ë¤¿¤á¤Î \fI\-Wno\-format\-y2k\fP ¥ª¥×¥·¥ç¥ó¤ò
456 Ä󶡤·¤Æ¤ª¤ê¡¢¾åµ¤Î²óÈòºö¤Ï¤â¤Ï¤äɬÍפʤ¤¡£
458 .B "RFC\ 2822 ½àµò¤ÎÆüÉÕ·Á¼°"
459 (%a ¤È %b ¤Ï±Ñ¸ì¥í¥±¡¼¥ë)
462 "%a,\ %d\ %b\ %Y\ %T\ %z"
464 .B "RFC\ 822 ½àµò¤ÎÆüÉÕ·Á¼°"
465 (%a ¤È %b ¤Ï±Ñ¸ì¥í¥±¡¼¥ë)
468 "%a,\ %d\ %b\ %y\ %T\ %z"
469 .SS ¥µ¥ó¥×¥ë¥×¥í¥°¥é¥à
470 °Ê²¼¤Î¥×¥í¥°¥é¥à¤ò»È¤¦¤È
476 ¤Î glibc ¼ÂÁõ¤¬À¸À®¤¹¤ë·ë²Ì¤ÎÎã¤ò¤¤¤¯¤Ä¤«¼¨¤¹:
479 .RB "$" " ./a.out \(aq%m\(aq"
480 Result string is "11"
481 .RB "$" " ./a.out \(aq%5m\(aq"
482 Result string is "00011"
483 .RB "$" " ./a.out \(aq%_5m\(aq"
484 Result string is " 11"
488 ¥×¥í¥°¥é¥à¤Î¥½¡¼¥¹¤Ï°Ê²¼¤ÎÄ̤ê:
496 main(int argc, char *argv[])
502 ¤Î glibc ¼ÂÁõ¤¬À¸À®¤¹¤ë·ë²Ì¤ÎÎã¤ò¤¤¤¯¤Ä¤«¼¨¤¹:
506 Result string is "11"
508 Result string is "00011"
510 Result string is " 11"
522 if (strftime(outstr, sizeof(outstr), argv[1], tmp) == 0) {
523 fprintf(stderr, "strftime returned 0");
527 printf("Result string is \\"%s\\"\\n", outstr);