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
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
|
/*
* dev.c - allocation/initialization/free routines for dev
*
* Copyright (C) 2001 Andreas Dilger
* Copyright (C) 2003 Theodore Ts'o
*
* %Begin-Header%
* This file may be redistributed under the terms of the
* GNU Lesser General Public License.
* %End-Header%
*/
#include <stdlib.h>
#include <string.h>
#include "blkidP.h"
blkid_dev blkid_new_dev(void)
{
blkid_dev dev;
if (!(dev = (blkid_dev) calloc(1, sizeof(struct blkid_struct_dev))))
return NULL;
INIT_LIST_HEAD(&dev->bid_devs);
INIT_LIST_HEAD(&dev->bid_tags);
return dev;
}
void blkid_free_dev(blkid_dev dev)
{
if (!dev)
return;
DBG(DEBUG_DEV,
printf(" freeing dev %s (%s)\n", dev->bid_name, dev->bid_type));
DBG(DEBUG_DEV, blkid_debug_dump_dev(dev));
list_del(&dev->bid_devs);
while (!list_empty(&dev->bid_tags)) {
blkid_tag tag = list_entry(dev->bid_tags.next,
struct blkid_struct_tag,
bit_tags);
blkid_free_tag(tag);
}
if (dev->bid_name)
free(dev->bid_name);
free(dev);
}
/*
* Given a blkid device, return its name
*/
const char *blkid_dev_devname(blkid_dev dev)
{
return dev->bid_name;
}
#ifdef CONFIG_BLKID_DEBUG
void blkid_debug_dump_dev(blkid_dev dev)
{
struct list_head *p;
if (!dev) {
printf(" dev: NULL\n");
return;
}
printf(" dev: name = %s\n", dev->bid_name);
printf(" dev: DEVNO=\"0x%0llx\"\n", dev->bid_devno);
printf(" dev: TIME=\"%lu\"\n", dev->bid_time);
printf(" dev: PRI=\"%d\"\n", dev->bid_pri);
printf(" dev: flags = 0x%08X\n", dev->bid_flags);
list_for_each(p, &dev->bid_tags) {
blkid_tag tag = list_entry(p, struct blkid_struct_tag, bit_tags);
if (tag)
printf(" tag: %s=\"%s\"\n", tag->bit_name,
tag->bit_val);
else
printf(" tag: NULL\n");
}
printf("\n");
}
#endif
/*
* dev iteration routines for the public libblkid interface.
*
* These routines do not expose the list.h implementation, which are a
* contamination of the namespace, and which force us to reveal far, far
* too much of our internal implemenation. I'm not convinced I want
* to keep list.h in the long term, anyway. It's fine for kernel
* programming, but performance is not the #1 priority for this
* library, and I really don't like the tradeoff of type-safety for
* performance for this application. [tytso:20030125.2007EST]
*/
/*
* This series of functions iterate over all devices in a blkid cache
*/
#define DEV_ITERATE_MAGIC 0x01a5284c
struct blkid_struct_dev_iterate {
int magic;
blkid_cache cache;
struct list_head *p;
};
blkid_dev_iterate blkid_dev_iterate_begin(blkid_cache cache)
{
blkid_dev_iterate iter;
iter = xmalloc(sizeof(struct blkid_struct_dev_iterate));
iter->magic = DEV_ITERATE_MAGIC;
iter->cache = cache;
iter->p = cache->bic_devs.next;
return (iter);
}
/*
* Return 0 on success, -1 on error
*/
extern int blkid_dev_next(blkid_dev_iterate iter,
blkid_dev *dev)
{
*dev = 0;
if (!iter || iter->magic != DEV_ITERATE_MAGIC ||
iter->p == &iter->cache->bic_devs)
return -1;
*dev = list_entry(iter->p, struct blkid_struct_dev, bid_devs);
iter->p = iter->p->next;
return 0;
}
void blkid_dev_iterate_end(blkid_dev_iterate iter)
{
if (!iter || iter->magic != DEV_ITERATE_MAGIC)
return;
iter->magic = 0;
free(iter);
}
#ifdef TEST_PROGRAM
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#else
extern char *optarg;
extern int optind;
#endif
void usage(char *prog)
{
fprintf(stderr, "Usage: %s [-f blkid_file] [-m debug_mask]\n", prog);
fprintf(stderr, "\tList all devices and exit\n", prog);
exit(1);
}
int main(int argc, char **argv)
{
blkid_dev_iterate iter;
blkid_cache cache = NULL;
blkid_dev dev;
int c, ret;
char *tmp;
char *file = NULL;
char *search_type = NULL;
char *search_value = NULL;
while ((c = getopt (argc, argv, "m:f:")) != EOF)
switch (c) {
case 'f':
file = optarg;
break;
case 'm':
blkid_debug_mask = strtoul (optarg, &tmp, 0);
if (*tmp) {
fprintf(stderr, "Invalid debug mask: %d\n",
optarg);
exit(1);
}
break;
case '?':
usage(argv[0]);
}
if (argc >= optind+2) {
search_type = argv[optind];
search_value = argv[optind+1];
optind += 2;
}
if (argc != optind)
usage(argv[0]);
if ((ret = blkid_get_cache(&cache, file)) != 0) {
fprintf(stderr, "%s: error creating cache (%d)\n",
argv[0], ret);
exit(1);
}
iter = blkid_dev_iterate_begin(cache);
if (search_type)
blkid_dev_set_search(iter, search_type, search_value);
while (blkid_dev_next(iter, &dev) == 0) {
printf("Device: %s\n", blkid_dev_devname(dev));
}
blkid_dev_iterate_end(iter);
blkid_put_cache(cache);
return (0);
}
#endif
|
