1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
|
/* Copyright (C) 1996-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@cygnus.com>
and Paul Janzen <pcj@primenet.com>, 1996.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <bits/libc-lock.h>
#include <stdlib.h>
#include <utmp.h>
#include "utmp-private.h"
/* Functions defined here. */
static int setutent_unknown (void);
static int getutent_r_unknown (struct utmp *buffer, struct utmp **result);
static int getutid_r_unknown (const struct utmp *line, struct utmp *buffer,
struct utmp **result);
static int getutline_r_unknown (const struct utmp *id, struct utmp *buffer,
struct utmp **result);
static struct utmp *pututline_unknown (const struct utmp *data);
static void endutent_unknown (void);
/* Initial Jump table. */
const struct utfuncs __libc_utmp_unknown_functions =
{
setutent_unknown,
getutent_r_unknown,
getutid_r_unknown,
getutline_r_unknown,
pututline_unknown,
endutent_unknown,
NULL
};
/* Currently selected backend. */
const struct utfuncs *__libc_utmp_jump_table = &__libc_utmp_unknown_functions;
/* We need to protect the opening of the file. */
__libc_lock_define_initialized (, __libc_utmp_lock attribute_hidden)
static int
setutent_unknown (void)
{
int result;
result = (*__libc_utmp_file_functions.setutent) ();
if (result)
__libc_utmp_jump_table = &__libc_utmp_file_functions;
return result;
}
static int
getutent_r_unknown (struct utmp *buffer, struct utmp **result)
{
/* The backend was not yet initialized. */
if (setutent_unknown ())
return (*__libc_utmp_jump_table->getutent_r) (buffer, result);
/* Not available. */
*result = NULL;
return -1;
}
static int
getutid_r_unknown (const struct utmp *id, struct utmp *buffer,
struct utmp **result)
{
/* The backend was not yet initialized. */
if (setutent_unknown ())
return (*__libc_utmp_jump_table->getutid_r) (id, buffer, result);
/* Not available. */
*result = NULL;
return -1;
}
static int
getutline_r_unknown (const struct utmp *line, struct utmp *buffer,
struct utmp **result)
{
/* The backend was not yet initialized. */
if (setutent_unknown ())
return (*__libc_utmp_jump_table->getutline_r) (line, buffer, result);
/* Not available. */
*result = NULL;
return -1;
}
static struct utmp *
pututline_unknown (const struct utmp *data)
{
/* The backend was not yet initialized. */
if (setutent_unknown ())
return (*__libc_utmp_jump_table->pututline) (data);
/* Not available. */
return NULL;
}
static void
endutent_unknown (void)
{
/* Nothing to do. */
}
void
__setutent (void)
{
__libc_lock_lock (__libc_utmp_lock);
(*__libc_utmp_jump_table->setutent) ();
__libc_lock_unlock (__libc_utmp_lock);
}
weak_alias (__setutent, setutent)
int
__getutent_r (struct utmp *buffer, struct utmp **result)
{
int retval;
__libc_lock_lock (__libc_utmp_lock);
retval = (*__libc_utmp_jump_table->getutent_r) (buffer, result);
__libc_lock_unlock (__libc_utmp_lock);
return retval;
}
weak_alias (__getutent_r, getutent_r)
struct utmp *
__pututline (const struct utmp *data)
{
struct utmp *buffer;
__libc_lock_lock (__libc_utmp_lock);
buffer = (*__libc_utmp_jump_table->pututline) (data);
__libc_lock_unlock (__libc_utmp_lock);
return buffer;
}
weak_alias (__pututline, pututline)
void
__endutent (void)
{
__libc_lock_lock (__libc_utmp_lock);
(*__libc_utmp_jump_table->endutent) ();
__libc_utmp_jump_table = &__libc_utmp_unknown_functions;
__libc_lock_unlock (__libc_utmp_lock);
}
weak_alias (__endutent, endutent)
|
