xref: /original-bsd/lib/libc/db/db/db.c (revision 55a2be2d)
1 /*-
2  * Copyright (c) 1991, 1993
3  *	The Regents of the University of California.  All rights reserved.
4  *
5  * %sccs.include.redist.c%
6  */
7 
8 #if defined(LIBC_SCCS) && !defined(lint)
9 static char sccsid[] = "@(#)db.c	8.4 (Berkeley) 02/21/94";
10 #endif /* LIBC_SCCS and not lint */
11 
12 #include <sys/types.h>
13 
14 #include <errno.h>
15 #include <fcntl.h>
16 #include <stddef.h>
17 #include <stdio.h>
18 
19 #include <db.h>
20 
21 DB *
dbopen(fname,flags,mode,type,openinfo)22 dbopen(fname, flags, mode, type, openinfo)
23 	const char *fname;
24 	int flags, mode;
25 	DBTYPE type;
26 	const void *openinfo;
27 {
28 
29 #define	DB_FLAGS	(DB_LOCK | DB_SHMEM | DB_TXN)
30 #define	USE_OPEN_FLAGS							\
31 	(O_CREAT | O_EXCL | O_EXLOCK | O_NONBLOCK | O_RDONLY |		\
32 	 O_RDWR | O_SHLOCK | O_TRUNC)
33 
34 	if ((flags & ~(USE_OPEN_FLAGS | DB_FLAGS)) == 0)
35 		switch (type) {
36 		case DB_BTREE:
37 			return (__bt_open(fname, flags & USE_OPEN_FLAGS,
38 			    mode, openinfo, flags & DB_FLAGS));
39 		case DB_HASH:
40 			return (__hash_open(fname, flags & USE_OPEN_FLAGS,
41 			    mode, openinfo, flags & DB_FLAGS));
42 		case DB_RECNO:
43 			return (__rec_open(fname, flags & USE_OPEN_FLAGS,
44 			    mode, openinfo, flags & DB_FLAGS));
45 		}
46 	errno = EINVAL;
47 	return (NULL);
48 }
49 
50 static int
__dberr()51 __dberr()
52 {
53 	return (RET_ERROR);
54 }
55 
56 /*
57  * __DBPANIC -- Stop.
58  *
59  * Parameters:
60  *	dbp:	pointer to the DB structure.
61  */
62 void
__dbpanic(dbp)63 __dbpanic(dbp)
64 	DB *dbp;
65 {
66 	/* The only thing that can succeed is a close. */
67 	dbp->del = (int (*)())__dberr;
68 	dbp->fd = (int (*)())__dberr;
69 	dbp->get = (int (*)())__dberr;
70 	dbp->put = (int (*)())__dberr;
71 	dbp->seq = (int (*)())__dberr;
72 	dbp->sync = (int (*)())__dberr;
73 }
74