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
|
/*
* SPDX-License-Identifier: GPL-2.0-or-later
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* Copyright (C) 2012-2023 Karel Zak <kzak@redhat.com>
*
* Original implementation from Linux 0.99, without License and copyright in
* the code. Karel Zak rewrote the code under GPL-2.0-or-later.
*/
#include "c.h"
#include "nls.h"
#include "xalloc.h"
#include "swapon-common.h"
/*
* content of /proc/swaps and /etc/fstab
*/
static struct libmnt_table *swaps, *fstab;
struct libmnt_cache *mntcache;
static int table_parser_errcb(struct libmnt_table *tb __attribute__((__unused__)),
const char *filename, int line)
{
if (filename)
warnx(_("%s: parse error at line %d -- ignored"), filename, line);
return 1;
}
struct libmnt_table *get_fstab(const char *filename)
{
if (!fstab) {
fstab = mnt_new_table();
if (!fstab)
return NULL;
mnt_table_set_parser_errcb(fstab, table_parser_errcb);
mnt_table_set_cache(fstab, mntcache);
if (mnt_table_parse_fstab(fstab, filename) != 0)
return NULL;
}
return fstab;
}
struct libmnt_table *get_swaps(void)
{
if (!swaps) {
swaps = mnt_new_table();
if (!swaps)
return NULL;
mnt_table_set_cache(swaps, mntcache);
mnt_table_set_parser_errcb(swaps, table_parser_errcb);
if (mnt_table_parse_swaps(swaps, NULL) != 0)
return NULL;
}
return swaps;
}
void free_tables(void)
{
mnt_unref_table(swaps);
mnt_unref_table(fstab);
}
int match_swap(struct libmnt_fs *fs, void *data __attribute__((unused)))
{
return fs && mnt_fs_is_swaparea(fs);
}
int is_active_swap(const char *filename)
{
struct libmnt_table *st = get_swaps();
return st && mnt_table_find_source(st, filename, MNT_ITER_BACKWARD);
}
int cannot_find(const char *special)
{
warnx(_("cannot find the device for %s"), special);
return -1;
}
/*
* Lists with -L and -U option
*/
static const char **llist;
static size_t llct;
static const char **ulist;
static size_t ulct;
void add_label(const char *label)
{
llist = xreallocarray(llist, ++llct, sizeof(char *));
llist[llct - 1] = label;
}
const char *get_label(size_t i)
{
return i < llct ? llist[i] : NULL;
}
size_t numof_labels(void)
{
return llct;
}
void add_uuid(const char *uuid)
{
ulist = xreallocarray(ulist, ++ulct, sizeof(char *));
ulist[ulct - 1] = uuid;
}
const char *get_uuid(size_t i)
{
return i < ulct ? ulist[i] : NULL;
}
size_t numof_uuids(void)
{
return ulct;
}
|
