1/*
2 * CDDL HEADER START
3 *
4 * The contents of this file are subject to the terms of the
5 * Common Development and Distribution License, Version 1.0 only
6 * (the "License").  You may not use this file except in compliance
7 * with the License.
8 *
9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
10 * or http://www.opensolaris.org/os/licensing.
11 * See the License for the specific language governing permissions
12 * and limitations under the License.
13 *
14 * When distributing Covered Code, include this CDDL HEADER in each
15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
16 * If applicable, add the following below this CDDL HEADER, with the
17 * fields enclosed by brackets "[]" replaced with your own identifying
18 * information: Portions Copyright [yyyy] [name of copyright owner]
19 *
20 * CDDL HEADER END
21 */
22/*
23 *	db_pickle.cc
24 *
25 *	Copyright (c) 1988-2000 by Sun Microsystems, Inc.
26 *	All Rights Reserved.
27 */
28
29#pragma ident	"%Z%%M%	%I%	%E% SMI"
30
31/* #include <sys/types.h> */
32#include <stdio.h>
33/* #include <syslog.h> */
34#include <string.h>
35#include <unistd.h>
36#include "db_headers.h"
37#include "db_pickle.h"
38#include "nisdb_mt.h"
39
40/* Constructor.  Creates pickle_file with given name and mode. */
41pickle_file::pickle_file(char* f, pickle_mode m)
42{
43	if ((filename = strdup(f)) == NULL) {
44		FATAL("pickle_file::pickle_file: cannot allocate space",
45			DB_MEMORY_LIMIT);
46	}
47
48	INITRW(pickle);
49
50	mode = m;
51}
52
53/*
54 * Opens pickle_file with mode specified with constructor.
55 * Returns TRUE if open was successful; FALSE otherwise.
56 */
57bool_t
58pickle_file::open()
59{
60	WRITELOCK(this, FALSE, "w pickle_file::open");
61	if (mode == PICKLE_READ) {
62		file = fopen(filename, "r");
63		if (file)
64			xdrstdio_create(&(xdr), file, XDR_DECODE);
65	} else if (mode == PICKLE_WRITE) {
66		file = fopen(filename, "w");
67		if (file) {
68			setvbuf(file, NULL, _IOFBF, 81920);
69			xdrstdio_create(&(xdr), file, XDR_ENCODE);
70		}
71	} else if (mode == PICKLE_APPEND) {
72		file = fopen(filename, "a");
73		if (file)
74			xdrstdio_create(&(xdr), file, XDR_ENCODE);
75	}
76	if (file == NULL) {
77		WRITEUNLOCK(this, FALSE, "wu pickle_file::open");
78		return (FALSE);
79	}
80	WRITEUNLOCK(this, FALSE, "wu pickle_file::open");
81	return (TRUE);
82}
83
84
85/* Closes pickle_file.  Returns 0 if successful; -1 otherwise. */
86int
87pickle_file::close()
88{
89	int	ret;
90
91	WRITELOCK(this, EOF, "w pickle_file::close");
92	xdr_destroy(&(xdr));
93	ret = fclose(file);
94	WRITEUNLOCK(this, EOF, "wu pickle_file::close");
95	return (ret);
96}
97
98
99/*
100 * dump or load data structure to/from 'filename' using function 'f'.
101 * dump or load is determined by 'mode' with which pickle_file was created.
102 * Returns 0 if successful; 1 if file cannot be opened in mode
103 * specified; -1 if transfer failed do to encoding/decoding errors.
104*/
105int
106pickle_file::transfer(pptr p, bool_t (*f) (XDR*, pptr))
107{
108	WRITELOCK(this, -1, "w pickle_file::transfer");
109	if (open()) {
110		if ((f)(&xdr, p) == FALSE) {
111			close();
112			WRITEUNLOCK(this, -1, "wu pickle_file::transfer");
113			return (-1);
114		} else {
115			fsync(fileno(file));
116			WRITEUNLOCK(this, -1, "wu pickle_file::transfer");
117			return (close());
118		}
119	}
120	WRITEUNLOCK(this, -1, "wu pickle_file::transfer");
121	return (1);
122}
123