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
|
/*
* find matching entry in fstab and export it
*
* Copyright (C) 2008 Kay Sievers <kay.sievers@vrfy.org>
*
* 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.
*/
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1
#endif
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <ctype.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <mntent.h>
#include <sys/stat.h>
#include "../../udev.h"
static int debug;
static char root[PATH_SIZE] = "/dev";
static char **devices;
#ifdef USE_LOG
void log_message(int priority, const char *format, ...)
{
va_list args;
static int udev_log = -1;
if (udev_log == -1) {
const char *value;
value = getenv("UDEV_LOG");
if (value)
udev_log = log_priority(value);
else
udev_log = LOG_ERR;
if (debug && udev_log < LOG_INFO)
udev_log = LOG_INFO;
}
if (priority > udev_log)
return;
va_start(args, format);
if (debug) {
fprintf(stderr, "[%d] ", (int) getpid());
vfprintf(stderr, format, args);
} else
vsyslog(priority, format, args);
va_end(args);
}
#endif
static int matches_device_list(const char *name)
{
int i;
for (i = 0; devices[i] != NULL; i++) {
info("compare '%s' == '%s'\n", name, devices[i]);
if (strcmp(devices[i], name) == 0)
return 1;
}
return 0;
}
static void print_fstab_entry(struct mntent *mnt)
{
printf("FSTAB_NAME=%s\n", mnt->mnt_fsname);
printf("FSTAB_DIR=%s\n", mnt->mnt_dir);
printf("FSTAB_TYPE=%s\n", mnt->mnt_type);
printf("FSTAB_OPTS=%s\n", mnt->mnt_opts);
printf("FSTAB_FREQ=%d\n", mnt->mnt_freq);
printf("FSTAB_PASSNO=%d\n", mnt->mnt_passno);
}
int main(int argc, char *argv[])
{
static const struct option options[] = {
{ "export", 0, NULL, 'x' },
{ "root", 1, NULL, 'r' },
{ "debug", 0, NULL, 'd' },
{ "help", 0, NULL, 'h' },
{}
};
FILE *fp;
struct mntent *mnt;
int rc = 0;
logging_init("fstab_id");
while (1) {
int option;
option = getopt_long(argc, argv, "dr:xh", options, NULL);
if (option == -1)
break;
switch (option) {
case 'r':
strlcpy(root, optarg, sizeof(root));
break;
case 'd':
debug = 1;
break;
case 'h':
printf("Usage: fstab_id [OPTIONS] name [...]\n"
" --export print environment keys\n"
" --root device node root (default /dev)\n"
" --debug debug to stderr\n"
" --help print this help text\n\n");
default:
rc = 1;
goto exit;
}
}
devices = &argv[optind];
if (devices[0] == NULL) {
fprintf(stderr, "error: missing device(s) to match\n");
rc = 2;
goto exit;
}
fp = setmntent ("/etc/fstab", "r");
if (fp == NULL) {
fprintf(stderr, "error: opening fstab: %s\n", strerror(errno));
rc = 2;
goto exit;
}
while (1) {
mnt = getmntent(fp);
if (mnt == NULL)
break;
/* skip root device */
if (strcmp(mnt->mnt_dir, "/") == 0)
continue;
/* match LABEL */
if (strncmp(mnt->mnt_fsname, "LABEL=", 6) == 0) {
const char *label;
char str[256];
label = &mnt->mnt_fsname[6];
if (label[0] == '"' || label[0] == '\'') {
char *pos;
strlcpy(str, &label[1], sizeof(str));
pos = strrchr(str, label[0]);
if (pos == NULL)
continue;
pos[0] = '\0';
label = str;
}
if (matches_device_list(str)) {
print_fstab_entry(mnt);
break;
}
continue;
}
/* match UUID */
if (strncmp(mnt->mnt_fsname, "UUID=", 5) == 0) {
const char *uuid;
char str[256];
uuid = &mnt->mnt_fsname[5];
if (uuid[0] == '"' || uuid[0] == '\'') {
char *pos;
strlcpy(str, &uuid[1], sizeof(str));
pos = strrchr(str, uuid[0]);
if (pos == NULL)
continue;
pos[0] = '\0';
uuid = str;
}
if (matches_device_list(str)) {
print_fstab_entry(mnt);
break;
}
continue;
}
/* only devices */
if (strncmp(mnt->mnt_fsname, root, strlen(root)) != 0)
continue;
if (matches_device_list(&mnt->mnt_fsname[strlen(root)+1])) {
print_fstab_entry(mnt);
break;
}
}
endmntent(fp);
exit:
logging_close();
return rc;
}
|
