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 /* #include <sys/types.h> */
30 #include <stdio.h>
31 /* #include <syslog.h> */
32 #include <string.h>
33 #include <unistd.h>
34 #include "db_headers.h"
35 #include "db_pickle.h"
36 #include "nisdb_mt.h"
37
38 /* Constructor. Creates pickle_file with given name and mode. */
pickle_file(char * f,pickle_mode m)39 pickle_file::pickle_file(char* f, pickle_mode m)
40 {
41 if ((filename = strdup(f)) == NULL) {
42 FATAL("pickle_file::pickle_file: cannot allocate space",
43 DB_MEMORY_LIMIT);
44 }
45
46 INITRW(pickle);
47
48 mode = m;
49 }
50
51 /*
52 * Opens pickle_file with mode specified with constructor.
53 * Returns TRUE if open was successful; FALSE otherwise.
54 */
55 bool_t
open()56 pickle_file::open()
57 {
58 WRITELOCK(this, FALSE, "w pickle_file::open");
59 if (mode == PICKLE_READ) {
60 file = fopen(filename, "r");
61 if (file)
62 xdrstdio_create(&(xdr), file, XDR_DECODE);
63 } else if (mode == PICKLE_WRITE) {
64 file = fopen(filename, "w");
65 if (file) {
66 setvbuf(file, NULL, _IOFBF, 81920);
67 xdrstdio_create(&(xdr), file, XDR_ENCODE);
68 }
69 } else if (mode == PICKLE_APPEND) {
70 file = fopen(filename, "a");
71 if (file)
72 xdrstdio_create(&(xdr), file, XDR_ENCODE);
73 }
74 if (file == NULL) {
75 WRITEUNLOCK(this, FALSE, "wu pickle_file::open");
76 return (FALSE);
77 }
78 WRITEUNLOCK(this, FALSE, "wu pickle_file::open");
79 return (TRUE);
80 }
81
82
83 /* Closes pickle_file. Returns 0 if successful; -1 otherwise. */
84 int
close()85 pickle_file::close()
86 {
87 int ret;
88
89 WRITELOCK(this, EOF, "w pickle_file::close");
90 xdr_destroy(&(xdr));
91 ret = fclose(file);
92 WRITEUNLOCK(this, EOF, "wu pickle_file::close");
93 return (ret);
94 }
95
96
97 /*
98 * dump or load data structure to/from 'filename' using function 'f'.
99 * dump or load is determined by 'mode' with which pickle_file was created.
100 * Returns 0 if successful; 1 if file cannot be opened in mode
101 * specified; -1 if transfer failed do to encoding/decoding errors.
102 */
103 int
transfer(pptr p,bool_t (* f)(XDR *,pptr))104 pickle_file::transfer(pptr p, bool_t (*f) (XDR*, pptr))
105 {
106 WRITELOCK(this, -1, "w pickle_file::transfer");
107 if (open()) {
108 if ((f)(&xdr, p) == FALSE) {
109 close();
110 WRITEUNLOCK(this, -1, "wu pickle_file::transfer");
111 return (-1);
112 } else {
113 fsync(fileno(file));
114 WRITEUNLOCK(this, -1, "wu pickle_file::transfer");
115 return (close());
116 }
117 }
118 WRITEUNLOCK(this, -1, "wu pickle_file::transfer");
119 return (1);
120 }
121