2 * Copyright (c) 1990 - 1994, Julianne Frances Haugh
3 * Copyright (c) 1996 - 2000, Marek Michałkiewicz
4 * Copyright (c) 2001 - 2005, Tomasz Kłoczko
5 * Copyright (c) 2007 - 2008, Nicolas François
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. The name of the copyright holders or contributors may not be used to
17 * endorse or promote products derived from this software without
18 * specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
23 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
24 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
25 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
26 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
27 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
28 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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30 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 /* $Id: commonio.h 2806 2009-04-25 14:16:22Z nekral-guest $ */
38 #include <selinux/selinux.h>
41 #include "defines.h" /* bool */
46 struct commonio_entry {
48 /*@null@*/void *eptr; /* struct passwd, struct spwd, ... */
49 /*@dependent@*/ /*@null@*/struct commonio_entry *prev;
50 /*@owned@*/ /*@null@*/struct commonio_entry *next;
55 * Operations depending on database type: passwd, group, shadow etc.
59 * Make a copy of the object (for example, struct passwd)
60 * and all strings pointed by it, in malloced memory.
62 /*@null@*/ /*@only@*/void *(*dup) (const void *);
65 * free() the object including any strings pointed by it.
67 void (*free) (/*@out@*/ /*@only@*/void *);
70 * Return the name of the object (for example, pw_name
73 const char *(*getname) (const void *);
76 * Parse a string, return object (in static area -
77 * should be copied using the dup operation above).
79 void *(*parse) (const char *);
82 * Write the object to the file (this calls putpwent()
83 * for struct passwd, for example).
85 int (*put) (const void *, FILE *);
88 * fgets and fputs (can be replaced by versions that
89 * understand line continuation conventions).
91 /*@null@*/char *(*fgets) (/*@returned@*/ /*@out@*/char *s, int n, FILE *stream);
92 int (*fputs) (const char *, FILE *);
95 * open_hook and close_hook.
96 * If non NULL, these functions will be called after the database
97 * is open or before it is closed.
98 * They return 0 on failure and 1 on success.
100 /*@null@*/int (*open_hook) (void);
101 /*@null@*/int (*close_hook) (void);
105 * Database structure.
109 * Name of the data file.
114 * Operations from above.
116 /*@observer@*/const struct commonio_ops *ops;
119 * Currently open file stream.
121 /*@dependent@*/ /*@null@*/FILE *fp;
124 /*@null@*/security_context_t scontext;
127 * Head, tail, current position in linked list.
129 /*@owned@*/ /*@null@*/struct commonio_entry *head, *tail;
130 /*@dependent@*/ /*@null@*/struct commonio_entry *cursor;
141 extern int commonio_setname (struct commonio_db *, const char *);
142 extern bool commonio_present (const struct commonio_db *db);
143 extern int commonio_lock (struct commonio_db *);
144 extern int commonio_lock_nowait (struct commonio_db *);
145 extern int commonio_open (struct commonio_db *, int);
146 extern /*@observer@*/ /*@null@*/const void *commonio_locate (struct commonio_db *, const char *);
147 extern int commonio_update (struct commonio_db *, const void *);
148 extern int commonio_remove (struct commonio_db *, const char *);
149 extern int commonio_rewind (struct commonio_db *);
150 extern /*@observer@*/ /*@null@*/const void *commonio_next (struct commonio_db *);
151 extern int commonio_close (struct commonio_db *);
152 extern int commonio_unlock (struct commonio_db *);
153 extern void commonio_del_entry (struct commonio_db *,
154 const struct commonio_entry *);
155 extern int commonio_sort_wrt (struct commonio_db *shadow,
156 struct commonio_db *passwd);
157 extern int commonio_sort (struct commonio_db *db,
158 int (*cmp) (const void *, const void *));