521 lines
14 KiB
Groff
521 lines
14 KiB
Groff
.\" Copyright (c) 1990, 1993
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.\" The Regents of the University of California. All rights reserved.
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.\"
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.\" Redistribution and use in source and binary forms, with or without
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.\" modification, are permitted provided that the following conditions
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.\" are met:
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.\" 1. Redistributions of source code must retain the above copyright
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.\" notice, this list of conditions and the following disclaimer.
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.\" 2. Redistributions in binary form must reproduce the above copyright
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.\" notice, this list of conditions and the following disclaimer in the
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.\" documentation and/or other materials provided with the distribution.
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.\" 3. All advertising materials mentioning features or use of this software
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.\" must display the following acknowledgement:
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.\" This product includes software developed by the University of
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.\" California, Berkeley and its contributors.
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.\" 4. Neither the name of the University nor the names of its contributors
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.\" may be used to endorse or promote products derived from this software
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.\" without specific prior written permission.
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.\"
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.\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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.\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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.\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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.\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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.\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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.\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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.\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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.\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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.\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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.\" SUCH DAMAGE.
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.\"
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.\" @(#)dbopen.3 8.5 (Berkeley) 1/2/94
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.\" %FreeBSD: src/lib/libc/db/man/dbopen.3,v 1.3.2.2 2001/12/14 18:33:49 ru Exp %
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.\" $FreeBSD$
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.\"
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.Dd January 2, 1994
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.Dt DBOPEN 3
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.Os
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.Sh ̾¾Î
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.Nm dbopen
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.Nd ¥Ç¡¼¥¿¥Ù¡¼¥¹¥¢¥¯¥»¥¹Êý¼°
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.Sh ½ñ¼°
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.In sys/types.h
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.In limits.h
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.In db.h
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.Ft DB *
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.Fn dbopen "const char *file" "int flags" "int mode" "DBTYPE type" "const void *openinfo"
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.Sh ²òÀâ
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.Fn dbopen
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¤Ï¡¢¥Ç¡¼¥¿¥Ù¡¼¥¹¥Õ¥¡¥¤¥ë¤Ø¤Î¥é¥¤¥Ö¥é¥ê¥¤¥ó¥¿¥Õ¥§¡¼¥¹¤Ç¤¹¡£
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¥µ¥Ý¡¼¥È¤µ¤ì¤Æ¤¤¤ë¥Õ¥¡¥¤¥ë¥Õ¥©¡¼¥Þ¥Ã¥È¤Ï¡¢
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btree
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·Á¼°¡¢¥Ï¥Ã¥·¥å·Á¼°¡¢UNIX ¥Õ¥¡¥¤¥ë»Ø¸þ·Á¼°¤Ç¤¹¡£
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btree
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¥Õ¥©¡¼¥Þ¥Ã¥È¤Ï¡¢¥½¡¼¥ÈºÑ¤ß¤Î¥Ð¥é¥ó¥¹¤Î¤È¤ì¤¿
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¥Ä¥ê¡¼¹½Â¤¤Îɽ¸½¤Ç¤¹¡£¥Ï¥Ã¥·¥å¥Õ¥©¡¼¥Þ¥Ã¥È¤Ï¡¢³ÈÄ¥²Äǽ¤ÇưŪ¤Ê
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¾Ü¤·¤¯½Ò¤Ù¤é¤ì¤Æ¤¤¤Þ¤¹¡£
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.Xr btree 3 ,
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.Xr hash 3 ,
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.Xr recno 3
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¤Ç¤¹¡£
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.Pp
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.Fn dbopen
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¤Ï¡¢Æɤ߹þ¤ß¤Þ¤¿¤Ï½ñ¤¹þ¤ßÍѤË
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.Fa file
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¤ò¥ª¡¼¥×¥ó¤·¤Þ¤¹¡£¥Ç¥£¥¹¥¯¾å¤ËÊÝ»ý¤¹¤ëɬÍפΤʤ¤¥Õ¥¡¥¤¥ë¤Ï¡¢
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¥Õ¥¡¥¤¥ë¥Ñ¥é¥á¡¼¥¿¤ò
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.Dv NULL
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¤ËÀßÄꤹ¤ë¤³¤È¤ÇºîÀ®¤Ç¤¤Þ¤¹¡£
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.Pp
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°ú¿ô
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.Fa flags
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¤È°ú¿ô
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.Fa mode
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¤Ï¡¢
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.Xr open 2
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¤Ç»ØÄꤵ¤ì¤â¤Î¤ÈƱ¤¸¤Ç¤¹¡£¤·¤«¤·¡¢
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.Dv O_CREAT , O_EXCL , O_EXLOCK , O_NONBLOCK ,
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.Dv O_RDONLY , O_RDWR , O_SHLOCK ,
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.Dv O_TRUNC
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¤Î³Æ¥Õ¥é¥°¤À¤±¤Ë°ÕÌ£¤¬¤¢¤ê¤Þ¤¹ (¥Ç¡¼¥¿¥Ù¡¼¥¹¥Õ¥¡¥¤¥ë¤Ï
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.Dv O_WRONLY
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¤Ç¤Ï
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¥ª¡¼¥×¥ó¤Ç¤¤Ê¤¤¤³¤È¤ËÃí°Õ¤·¤Æ¤¯¤À¤µ¤¤)¡£
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.\"Three additional options may be specified by
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.\".Em or Ns 'ing
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.\"them into the
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.\".Fa flags
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.\"argument.
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.\".Bl -tag -width indent
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.\".It Dv DB_LOCK
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.\"Do the necessary locking in the database to support concurrent access.
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.\"If concurrent access isn't needed or the database is read-only this
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.\"flag should not be set, as it tends to have an associated performance
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.\"penalty.
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.\".It Dv DB_SHMEM
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.\"Place the underlying memory pool used by the database in shared
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.\"memory.
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.\"Necessary for concurrent access.
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.\".It Dv DB_TXN
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.\"Support transactions in the database.
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.\"The
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.\".Dv DB_LOCK
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.\"and
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.\".Dv DB_SHMEM
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.\"flags must be set as well.
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.\".El
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.Pp
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°ú¿ô
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.Fa type
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¤Ï¡¢¥¿¥¤¥×
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.Ft DBTYPE
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(¥¤¥ó¥¯¥ë¡¼¥É¥Õ¥¡¥¤¥ë
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.Aq Pa db.h
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¤ÇÄêµÁ¤µ¤ì¤Æ¤¤¤Þ¤¹)
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¤Ç¤¢¤ê¡¢
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.Dv DB_BTREE ,
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.Dv DB_HASH ,
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.Dv DB_RECNO
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¤òÀßÄê¤Ç¤¤Þ¤¹¡£
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.Pp
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°ú¿ô
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.Fa openinfo
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¤Ï¡¢¥¢¥¯¥»¥¹Êý¼°¤Î¥Þ¥Ë¥å¥¢¥ë¥Ú¡¼¥¸¤ËÀâÌÀ¤·¤Æ¤¢¤ë¤è¤¦¤Ë¡¢
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¥¢¥¯¥»¥¹Êý¼°¤Ë¸Çͤι½Â¤¤ò»Ø¤¹¥Ý¥¤¥ó¥¿¤Ç¤¹¡£
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.Fa openinfo
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¤¬
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.Dv NULL
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¤Î¾ì¹ç¡¢³Æ¥¢¥¯¥»¥¹Êý¼°¤Ï¡¢¥·¥¹¥Æ¥à¤È¥¢¥¯¥»¥¹Êý¼°¤Ë
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ŬÀڤʥǥե©¥ë¥È¤ò»ÈÍѤ·¤Þ¤¹¡£
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.Pp
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.Fn dbopen
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¤Ï¡¢½èÍý¤¬À®¸ù¤¹¤ë¤È
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.Ft DB
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¹½Â¤ÂΤò»Ø¤¹¥Ý¥¤¥ó¥¿¤òÊÖ¤·¡¢
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¥¨¥é¡¼¤Î¾ì¹ç¤Ë¤Ï¥Ì¥ë¤òÊÖ¤·¤Þ¤¹¡£
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.Ft DB
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¹½Â¤ÂΤϡ¢¥¤¥ó¥¯¥ë¡¼¥É¥Õ¥¡¥¤¥ë
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.Aq Pa db.h
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Æâ¤ËÄêµÁ¤µ¤ì¤Æ¤ª¤ê¡¢
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¾¯¤Ê¤¯¤È¤â¼¡¤Î¥Õ¥£¡¼¥ë¥É¤¬´Þ¤Þ¤ì¤Æ¤¤¤Þ¤¹¡£
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.Bd -literal
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typedef struct {
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DBTYPE type;
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int (*close)(const DB *db);
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int (*del)(const DB *db, const DBT *key, u_int flags);
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int (*fd)(const DB *db);
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int (*get)(const DB *db, DBT *key, DBT *data, u_int flags);
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int (*put)(const DB *db, DBT *key, const DBT *data,
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u_int flags);
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int (*sync)(const DB *db, u_int flags);
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int (*seq)(const DB *db, DBT *key, DBT *data, u_int flags);
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} DB;
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.Ed
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.Pp
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¤³¤ì¤é¤ÎÍ×ÁǤϡ¢¥Ç¡¼¥¿¥Ù¡¼¥¹¥¿¥¤¥×¤È³Æ¼ï¤Î¥¢¥¯¥·¥ç¥ó¤ò¼Â¹Ô¤¹¤ë
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´Ø¿ô¤Î¥»¥Ã¥È¤òµ½Ò¤·¤Æ¤¤¤Þ¤¹¡£¤³¤ì¤é¤Î´Ø¿ô¤Ï¡¢
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.Fn dbopen
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¤Ë¤è¤Ã¤ÆÊÖ¤µ¤ì¤¿¹½Â¤ÂΤؤΥݥ¤¥ó¥¿¤ò°ú¿ô¤Ë¼è¤ê¡¢
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»þ¡¹¥¡¼ / ¥Ç¡¼¥¿¹½Â¤¤È¥Õ¥é¥°Ãͤò»Ø¤¹ 1 ¤Ä¤Þ¤¿¤ÏÊ£¿ô¤Î¥Ý¥¤¥ó¥¿¤ò
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.Bl -tag -width indent
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.It Va type
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´ðËÜ¥¢¥¯¥»¥¹Êý¼° (¤ª¤è¤Ó¥Õ¥¡¥¤¥ë¥Õ¥©¡¼¥Þ¥Ã¥È) ¤Î¥¿¥¤¥×¡£
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.Va close
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´Ø¿ô¤Þ¤¿¤Ï
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.Va sync
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´Ø¿ô¤Ç¥Õ¥¡¥¤¥ë¤òƱ´ü¤¹¤ë¤Î¤Ë¼ºÇÔ¤¹¤ë¤È¡¢¾ðÊó¤ËÌ·½â¤ä·çÍ
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.Va close
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¥ë¡¼¥Á¥ó¤Ï¡¢¥¨¥é¡¼½ªÎ»»þ¤Ë¤Ï -1 ¤òÊÖ¤· (
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.Va errno
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¤òÀßÄê)¡¢
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Àµ¾ï½ªÎ»»þ¤Ë¤Ï 0 ¤òÊÖ¤·¤Þ¤¹¡£
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.It Va del
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¥¡¼ / ¥Ç¡¼¥¿¤ÎÁȤò¥Ç¡¼¥¿¥Ù¡¼¥¹¤«¤éºï½ü¤¹¤ë¥ë¡¼¥Á¥ó¤ò»Ø¤¹¥Ý¥¤¥ó¥¿¡£
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.Fa flags
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¤Ï¼¡¤ÎÃͤËÀßÄê¤Ç¤¤Þ¤¹¡£
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.It Dv R_CURSOR
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¥«¡¼¥½¥ë¤¬»²¾È¤¹¤ë¥ì¥³¡¼¥É¤òºï½ü¤·¤Þ¤¹¡£¥«¡¼¥½¥ë¤Ï¡¢
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.El
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.Pp
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.Va delete
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¥ë¡¼¥Á¥ó¤Ï¥¨¥é¡¼½ªÎ»»þ¤Ë¤Ï -1 ¤òÊÖ¤· (
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.Va errno
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¤¬¥Õ¥¡¥¤¥ë¤ÎÃæ¤Ë¤Ê¤«¤Ã¤¿¾ì¹ç¤Ï 1 ¤òÊÖ¤·¤Þ¤¹¡£
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.It Va fd
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´ðËܥǡ¼¥¿¥Ù¡¼¥¹¤Î¥Õ¥¡¥¤¥ëµ½Òɽ¸½¤òÊÖ¤¹¥ë¡¼¥Á¥ó¤ò»Ø¤¹¥Ý¥¤¥ó¥¿¡£
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̾¤Ç
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.Fn dbopen
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¤ò¸Æ¤Ó½Ð¤¹Á´¥×¥í¥»¥¹¤ËÊÖ¤µ¤ì¤Þ¤¹¡£¤³¤Î¥Õ¥¡¥¤¥ëµ½Ò»Ò¤Ï¡¢¥í¥Ã¥¯´Ø¿ô
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¤È
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.Fa data
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.Va get
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.Va errno
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¤¬¥Õ¥¡¥¤¥ë¤ÎÃæ¤Ë¤Ê¤«¤Ã¤¿¾ì¹ç¤Ï 1 ¤òÊÖ¤·¤Þ¤¹¡£
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.It Va put
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¤Ë¤Ï¼¡¤ÎÃͤΠ1 ¤Ä¤òÀßÄê¤Ç¤¤Þ¤¹¡£
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.It Dv R_CURSOR
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.It Dv R_IAFTER
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.Fa key
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.Fa key
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¹½Â¤ÂÎÆâ¤ËÊÖ¤µ¤ì¤Þ¤¹ (
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.It Dv R_IBEFORE
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.Fa key
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¹½Â¤ÂÎÆâ¤ËÊÖ¤µ¤ì¤Þ¤¹ (
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.Dv DB_RECNO
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¥¢¥¯¥»¥¹Êý¼°¤Ë¤À¤±Å¬ÍѤǤ¤Þ¤¹)¡£
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.It Dv R_NOOVERWRITE
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¥¡¼¤¬¤½¤ì°ÊÁ°¤Ë¸ºß¤·¤Ê¤¤¾ì¹ç¤Ë¤À¤±¡¢¿·¤·¤¤¥¡¼ / ¥Ç¡¼¥¿¤ÎÁȤòÆþÎϤ·¤Þ¤¹¡£
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.It Dv R_SETCURSOR
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.Dv DB_BTREE
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¤ª¤è¤Ó
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.Dv DB_RECNO
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.El
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.Pp
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.Dv R_SETCURSOR
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¤¬ÍøÍѤǤ¤ë¤Î¤Ï¡¢
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¤È
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¤È
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.Dv R_IBEFORE
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