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[linuxjm/jm.git] / manual / LDP_man-pages / draft / man3 / rpmatch.3

.\" Copyright (C) 2006 Justin Pryzby <pryzbyj@justinpryzby.com>
.\"
.\" Permission is hereby granted, free of charge, to any person obtaining
.\" a copy of this software and associated documentation files (the
.\" "Software"), to deal in the Software without restriction, including
.\" without limitation the rights to use, copy, modify, merge, publish,
.\" distribute, sublicense, and/or sell copies of the Software, and to
.\" permit persons to whom the Software is furnished to do so, subject to
.\" the following conditions:
.\"
.\" The above copyright notice and this permission notice shall be
.\" included in all copies or substantial portions of the Software.
.\"
.\" THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
.\" EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
.\" MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
.\" IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
.\" CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
.\" TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
.\" SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
.\"
.\" References:
.\"   glibc manual and source
.\"
.\" 2006-05-19, mtk, various edits and example program
.\"
.\" Japanese Version Copyright (c) 2006 Akihiro MOTOKI all rights reserved.
.\" Translated 2006-07-31, Akihiro MOTOKI <amotoki@dd.iij4u.or.jp>
.\"
.TH RPMATCH 3 2007-07-26 "GNU" "Linux Programmer's Manual"
.\"O .SH NAME
.SH ̾Á°
.\"O rpmatch \- determine if the answer to a question is affirmative or negative
rpmatch \- ¼ÁÌä¤Ø¤Î±þÅú¤¬¹ÎÄ꤫ÈÝÄ꤫¤òȽÄꤹ¤ë
.\"O .SH SYNOPSIS
.SH ½ñ¼°
.nf
.B #include <stdlib.h>

.BI "int rpmatch(const char *" response );
.fi
.sp
.in -4n
.\"O Feature Test Macro Requirements for glibc (see
.\"O .BR feature_test_macros (7)):
glibc ¸þ¤±¤Îµ¡Ç½¸¡ºº¥Þ¥¯¥í¤ÎÍ×·ï
.RB ( feature_test_macros (7)
»²¾È):
.in
.sp
.BR rpmatch ():
_SVID_SOURCE
.\"O .SH DESCRIPTION
.SH ÀâÌÀ
.\"O .BR rpmatch ()
.\"O handles a user response to yes or no questions, with
.\"O support for internationalization.
.BR  rpmatch ()
¤Ï yes/no ¤Î¼ÁÌä¤ËÂФ¹¤ë¥æ¡¼¥¶¤«¤é¤Î±þÅú¤ò½èÍý¤¹¤ë¡£
¹ñºÝ²½ (I18N) ¤ËÂбþ¤·¤Æ¤¤¤ë¡£

.\"O \fIresponse\fP should be a null-terminated string containing a
.\"O user-supplied response, perhaps obtained with
.\"O .BR fgets (3)
.\"O or
.\"O .BR getline (3).
.I response
¤Ë¤Ï¥æ¡¼¥¶¤«¤é¤Î±þÅú¤ò³ÊǼ¤·¤¿ NULL ½ªÃ¼Ê¸»úÎó¤¬Æþ¤Ã¤Æ¤¤¤ëɬÍפ¬¤¢¤ë¡£
¤¿¤¤¤Æ¤¤¤Ï¡¢
.BR fgets (3)
¤ä
.BR getline (3)
¤Ç¼è¤ê¹þ¤ó¤À¤â¤Î¤Ç¤¢¤í¤¦¡£

.\"O The user's language preference is taken into account per the
.\"O environment variables \fBLANG\fP, \fBLC_MESSAGES\fP, and \fBLC_ALL\fP,
.\"O if the program has called
.\"O .BR setlocale (3)
.\"O to effect their changes.
¥×¥í¥°¥é¥à¤¬
.BR setlocale (3)
¤ò¸Æ¤Ó½Ð¤·¤Æ´Ä¶­ÊÑ¿ô¤ÎÊѹ¹¤òÍ­¸ú¤Ë¤·¤¿¾ì¹ç¡¢
´Ä¶­ÊÑ¿ô \fBLANG\fP, \fBLC_MESSAGES\fP, \fBLC_ALL\fP ¤¬
¥æ¡¼¥¶¤Î¸À¸ìÀßÄê¤È¤·¤Æ¹Í褵¤ì¤ë¡£

.\"O Regardless of the locale, responses matching \fB^[Yy]\fP are always
.\"O accepted as affirmative, and those matching \fB^[Nn]\fP are always
.\"O accepted as negative.
¥í¥±¡¼¥ë¤Ë´Ø¤ï¤é¤º¡¢\fB^[Yy]\fP ¤Ë¥Þ¥Ã¥Á¤¹¤ë±þÅú¤Ï¾ï¤Ë¹ÎÄê¤À¤È²ò¼á¤µ¤ì¡¢
\fB^[Nn]\fP ¤Ë¥Þ¥Ã¥Á¤¹¤ë±þÅú¤Ï¾ï¤ËÈÝÄê¤À¤È²ò¼á¤µ¤ì¤ë¡£
.\"O .SH "RETURN VALUE"
.SH ÊÖ¤êÃÍ
.\"O After examining
.\"O .IR response ,
.\"O .BR rpmatch ()
.\"O returns 0 for a recognized negative response ("no"), 1
.\"O for a recognized positive response ("yes"), and \-1 when the value
.\"O of \fIresponse\fP is unrecognized.
.I response
¤ò¸¡ºº¤·¤¿¸å¡¢
.BR rpmatch ()
¤ÏÈÝÄêŪ¤Ê±þÅú ("no") ¤Èǧ¼±¤·¤¿¾ì¹ç¤Ï 0 ¤òÊÖ¤·¡¢
¹ÎÄêŪ¤Ê±þÅú ("yes") ¤Èǧ¼±¤·¤¿¾ì¹ç¤Ï 1 ¤òÊÖ¤¹¡£
.I response
¤ÎÃͤò²ò¼á¤Ç¤­¤Ê¤«¤Ã¤¿¾ì¹ç¤Ï \-1 ¤òÊÖ¤¹¡£
.\"O .SH ERRORS
.SH ¥¨¥é¡¼
.\"O A return value of \-1 may indicate either an invalid input, or some
.\"O other error.
.\"O It is incorrect to only test if the return value is nonzero.
ÊÖ¤êÃÍ \-1 ¤¬Ê֤俾ì¹ç¡¢ÆþÎϤ¬ÉÔÀµ¤Ç¤¢¤Ã¤¿¤«¡¢Â¾¤Î²¿¤é¤«¤Î¥¨¥é¡¼¤¬
¤¢¤Ã¤¿¤³¤È¤ò°ÕÌ£¤¹¤ë¡£ÊÖ¤êÃͤ¬ 0 °Ê³°¤«¤É¤¦¤«¤ò³Îǧ¤¹¤ë¤À¤±¤Ç¤Ï
½½Ê¬¤Ç¤Ï¤Ê¤¤¡£

.\"O .BR rpmatch ()
.\"O can fail for any of the reasons that
.\"O .BR regcomp (3)
.\"O or
.\"O .BR regexec (3)
.\"O can fail; the cause of the error
.\"O is not available from \fIerrno\fP or anywhere else, but indicates a
.\"O failure of the regex engine (but this case is indistinguishable from
.\"O that of an unrecognized value of \fIresponse\fP).
.BR rpmatch ()
¤Ï¡¢
.BR regcomp (3)
¤ä
.BR regexec (3)
¤¬¼ºÇÔ¤¹¤ëÍýͳ¤Î¤É¤ì¤«¤Ç¼ºÇÔ¤¹¤ë¤³¤È¤¬¤¢¤ë¡£
¥¨¥é¡¼¤Î¸¶°ø¤ò
.I errno
¤ä¾¤Î²¿¤«¤ÇÃΤ뤳¤È¤Ï¤Ç¤­¤Ê¤¤¤¬¡¢
.I errno
¤ÏÀµµ¬É½¸½¥¨¥ó¥¸¥ó¤Î¼ºÇԤθ¶°ø¤ò¼¨¤·¤Æ¤¤¤ë
(⤷¡¢¤³¤Î¥±¡¼¥¹¤È
.I response
¤ÎÃͤòǧ¼±¤Ç¤­¤º¤Ë¼ºÇÔ¤·¤¿¾ì¹ç¤ò¶èÊ̤¹¤ë¤³¤È¤Ï¤Ç¤­¤Ê¤¤)¡£
.\"O .SH "CONFORMING TO"
.SH ½àµò
.\"O .BR rpmatch ()
.\"O is not required by any standard, but
.\"O is available on a few other systems.
.BR rpmatch ()
¤Ï¤É¤Îɸ½à¤Ç¤âɬ¿Ü¤È¤Ê¤Ã¤Æ¤¤¤Ê¤¤¤¬¡¢
Linux °Ê³°¤Ë¤âÍøÍѤǤ­¤ë¥·¥¹¥Æ¥à¤â¤¤¤¯¤Ä¤«¤Ï¸ºß¤¹¤ë¡£
.\"O .\" It is available on at least AIX 5.1 and FreeBSD 6.0.
.\" ¾¯¤Ê¤¯¤È¤â AIX 5.1 ¤È FreeBSD 6.0 ¤Ç¤ÏÍøÍѤǤ­¤ë¡£
.\"O .SH BUGS
.SH ¥Ð¥°
.\"O The
.\"O .BR rpmatch ()
.\"O implementation looks at only the first character
.\"O of \fIresponse\fP.
.\"O As a consequence, "nyes" returns 0, and
.\"O "ynever; not in a million years" returns 1.
.\"O It would be preferable to accept input strings much more
.\"O strictly, for example (using the extended regular
.\"O expression notation described in
.\"O .BR regex (7)):
.\"O \fB^([yY]|yes|YES)$\fP and \fB^([nN]|no|NO)$\fP.
.BR rpmatch ()
¤Î¼ÂÁõ¤Ï
.I response
¤ÎºÇ½é¤Î 1 ʸ»ú¤À¤±¤ò¸«¤Æ¤¤¤ë¤è¤¦¤Ç¤¢¤ë¡£¤½¤Î·ë²Ì¡¢
"nyes" ¤Ï 0 ¤òÊÖ¤·¡¢
"ynever; not in a million years" ¤Ï 1 ¤òÊÖ¤¹¤³¤È¤Ë¤Ê¤ë¡£
ÆþÎÏʸ»úÎó¤ò¤â¤Ã¤È¸·Ì©¤Ë²ò¼á¤·¤¿Êý¤¬¤è¤¤¤À¤í¤¦¡£
Î㤨¤Ð¡¢
.RB ( regex (7)
¤ÇÀâÌÀ¤µ¤ì¤Æ¤¤¤ë³ÈÄ¥Àµµ¬É½¸½¤ò»È¤Ã¤Æ)
.BR ^([yY]|yes|YES)$ " ¤ä " ^([nN]|no|NO)$
¤Ç²ò¼á¤¹¤ë¤Ê¤É¡£
.\"O .SH EXAMPLE
.SH Îã
.\"O The following program displays the results when
.\"O .BR rpmatch ()
.\"O is applied to the string given in the program's command-line argument.
°Ê²¼¤Î¥×¥í¥°¥é¥à¤Ï¡¢¥³¥Þ¥ó¥É¥é¥¤¥ó°ú¤­¿ô¤Ç
»ØÄꤵ¤ì¤¿Ê¸»úÎó¤ò
.BR rpmatch ()
¤ËÅϤ·¤¿¾ì¹ç¤Î·ë²Ì¤òɽ¼¨¤¹¤ë¡£
.nf

#define _SVID_SOURCE
#include <locale.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>

int
main(int argc, char *argv[])
{
    if (argc != 2 || strcmp(argv[1], "\-\-help") == 0) {
        fprintf(stderr, "%s response\\n", argv[0]);
        exit(EXIT_FAILURE);
    }

    setlocale(LC_ALL, "");
    printf("rpmatch() returns: %d\\n", rpmatch(argv[1]));
    exit(EXIT_SUCCESS);
}
.fi
.\"O .SH SEE ALSO
.SH ´ØÏ¢¹àÌÜ
.BR fgets (3),
.BR getline (3),
.BR nl_langinfo (3),
.BR regcomp (3),
.BR setlocale (3)