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
|
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <sys/mman.h>
#include "nvram.h"
static nvram_handle_t * nvram_open_rdonly(void)
{
const char *file = nvram_find_staging();
if( file == NULL )
file = nvram_find_mtd();
if( file != NULL )
return nvram_open(file, NVRAM_RO);
return NULL;
}
static nvram_handle_t * nvram_open_staging(void)
{
if( nvram_find_staging() != NULL || nvram_to_staging() == 0 )
return nvram_open(NVRAM_STAGING, NVRAM_RW);
return NULL;
}
static int do_show(nvram_handle_t *nvram)
{
nvram_tuple_t *t;
int stat = 1;
if( (t = nvram_getall(nvram)) != NULL )
{
while( t )
{
printf("%s=%s\n", t->name, t->value);
t = t->next;
}
stat = 0;
}
return stat;
}
static int do_get(nvram_handle_t *nvram, const char *var)
{
const char *val;
int stat = 1;
if( (val = nvram_get(nvram, var)) != NULL )
{
printf("%s\n", val);
stat = 0;
}
return stat;
}
static int do_unset(nvram_handle_t *nvram, const char *var)
{
return nvram_unset(nvram, var);
}
static int do_set(nvram_handle_t *nvram, const char *pair)
{
char *val = strstr(pair, "=");
char var[strlen(pair)];
int stat = 1;
if( val != NULL )
{
memset(var, 0, sizeof(var));
strncpy(var, pair, (int)(val-pair));
stat = nvram_set(nvram, var, (char *)(val + 1));
}
return stat;
}
int main( int argc, const char *argv[] )
{
nvram_handle_t *nvram;
int commit = 0;
int write = 0;
int stat = 1;
int done = 0;
int i;
/* Ugly... iterate over arguments to see whether we can expect a write */
for( i = 1; i < argc; i++ )
if( ( !strcmp(argv[i], "set") && ++i < argc ) ||
( !strcmp(argv[i], "unset") && ++i < argc ) ||
!strcmp(argv[i], "commit") )
{
write = 1;
break;
}
if( (nvram = write ? nvram_open_staging() : nvram_open_rdonly()) != NULL && argc > 1 )
{
for( i = 1; i < argc; i++ )
{
if( !strcmp(argv[i], "show") )
{
stat = do_show(nvram);
done++;
}
else if( !strcmp(argv[i], "get") && ++i < argc )
{
stat = do_get(nvram, argv[i]);
done++;
}
else if( !strcmp(argv[i], "unset") && ++i < argc )
{
stat = do_unset(nvram, argv[i]);
done++;
}
else if( !strcmp(argv[i], "set") && ++i < argc )
{
stat = do_set(nvram, argv[i]);
done++;
}
else if( !strcmp(argv[i], "commit") )
{
commit = 1;
done++;
}
else
{
done = 0;
break;
}
}
if( write )
stat = nvram_commit(nvram);
nvram_close(nvram);
if( commit )
stat = staging_to_nvram();
}
if( !nvram )
{
fprintf(stderr,
"Could not open nvram! Possible reasons are:\n"
" - No device found (/proc not mounted or no nvram present)\n"
" - Insufficient permissions to open mtd device\n"
" - Insufficient memory to complete operation\n"
" - Memory mapping failed or not supported\n"
);
stat = 1;
}
else if( !done )
{
fprintf(stderr,
"Usage:\n"
" nvram show\n"
" nvram get variable\n"
" nvram set variable=value [set ...]\n"
" nvram unset variable [unset ...]\n"
" nvram commit\n"
);
stat = 1;
}
return stat;
}
|
