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
184
185
186
187
188
189
|
/* Copyright (C) 1995, 1996, 1997, 1998, 2000, 2008
Free Software Foundation, Inc.
This file is part of the GNU C Library.
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 <fstab.h>
#include <mntent.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <bits/libc-lock.h>
#define BUFFER_SIZE 0x1fc0
struct fstab_state
{
FILE *fs_fp;
char *fs_buffer;
struct mntent fs_mntres;
struct fstab fs_ret;
};
static struct fstab_state *fstab_init (int opt_rewind);
static struct mntent *fstab_fetch (struct fstab_state *state);
static struct fstab *fstab_convert (struct fstab_state *state);
static struct fstab_state fstab_state;
int
setfsent (void)
{
return fstab_init (1) != NULL;
}
struct fstab *
getfsent (void)
{
struct fstab_state *state;
state = fstab_init (0);
if (state == NULL)
return NULL;
if (fstab_fetch (state) == NULL)
return NULL;
return fstab_convert (state);
}
struct fstab *
getfsspec (name)
const char *name;
{
struct fstab_state *state;
struct mntent *m;
state = fstab_init (1);
if (state == NULL)
return NULL;
while ((m = fstab_fetch (state)) != NULL)
if (strcmp (m->mnt_fsname, name) == 0)
return fstab_convert (state);
return NULL;
}
struct fstab *
getfsfile (name)
const char *name;
{
struct fstab_state *state;
struct mntent *m;
state = fstab_init (1);
if (state == NULL)
return NULL;
while ((m = fstab_fetch (state)) != NULL)
if (strcmp (m->mnt_dir, name) == 0)
return fstab_convert (state);
return NULL;
}
void
endfsent ()
{
struct fstab_state *state;
state = &fstab_state;
if (state->fs_fp != NULL)
{
(void) __endmntent (state->fs_fp);
state->fs_fp = NULL;
}
}
static struct fstab_state *
fstab_init (int opt_rewind)
{
struct fstab_state *state;
char *buffer;
FILE *fp;
state = &fstab_state;
buffer = state->fs_buffer;
if (buffer == NULL)
{
buffer = (char *) malloc (BUFFER_SIZE);
if (buffer == NULL)
return NULL;
state->fs_buffer = buffer;
}
fp = state->fs_fp;
if (fp != NULL)
{
if (opt_rewind)
rewind (fp);
}
else
{
fp = __setmntent (_PATH_FSTAB, "r");
if (fp == NULL)
return NULL;
state->fs_fp = fp;
}
return state;
}
static struct mntent *
fstab_fetch (struct fstab_state *state)
{
return __getmntent_r (state->fs_fp, &state->fs_mntres,
state->fs_buffer, BUFFER_SIZE);
}
static struct fstab *
fstab_convert (struct fstab_state *state)
{
struct mntent *m;
struct fstab *f;
m = &state->fs_mntres;
f = &state->fs_ret;
f->fs_spec = m->mnt_fsname;
f->fs_file = m->mnt_dir;
f->fs_vfstype = m->mnt_type;
f->fs_mntops = m->mnt_opts;
f->fs_type = (__hasmntopt (m, FSTAB_RW) ? FSTAB_RW :
__hasmntopt (m, FSTAB_RQ) ? FSTAB_RQ :
__hasmntopt (m, FSTAB_RO) ? FSTAB_RO :
__hasmntopt (m, FSTAB_SW) ? FSTAB_SW :
__hasmntopt (m, FSTAB_XX) ? FSTAB_XX :
"??");
f->fs_freq = m->mnt_freq;
f->fs_passno = m->mnt_passno;
return f;
}
/* Make sure the memory is freed if the programs ends while in
memory-debugging mode and something actually was allocated. */
libc_freeres_fn (fstab_free)
{
char *buffer;
buffer = fstab_state.fs_buffer;
free ((void *) buffer);
}
|
GitWeb