summaryrefslogtreecommitdiff
path: root/package/system/utils/nvram/src/cli.c
blob: 66ef904885854894b3d9dda6b40a1bd3e5c832f2 (plain)
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
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
/*
 * Command line interface for libnvram
 *
 * Copyright 2009, Jo-Philipp Wich <xm@subsignal.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.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
 *
 *
 * The libnvram code is based on Broadcom code for Linux 2.4.x .
 *
 */

#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;
}

static int do_info(nvram_handle_t *nvram)
{
	nvram_header_t *hdr = nvram_header(nvram);

	/* CRC8 over the last 11 bytes of the header and data bytes */
	uint8_t crc = hndcrc8((unsigned char *) &hdr[0] + NVRAM_CRC_START_POSITION,
		hdr->len - NVRAM_CRC_START_POSITION, 0xff);

	/* Show info */
	printf("Magic:         0x%08X\n",   hdr->magic);
	printf("Length:        0x%08X\n",   hdr->len);
	printf("Offset:        0x%08X\n",   nvram->offset);

	printf("CRC8:          0x%02X (calculated: 0x%02X)\n",
		hdr->crc_ver_init & 0xFF, crc);

	printf("Version:       0x%02X\n",   (hdr->crc_ver_init >> 8) & 0xFF);
	printf("SDRAM init:    0x%04X\n",   (hdr->crc_ver_init >> 16) & 0xFFFF);
	printf("SDRAM config:  0x%04X\n",   hdr->config_refresh & 0xFFFF);
	printf("SDRAM refresh: 0x%04X\n",   (hdr->config_refresh >> 16) & 0xFFFF);
	printf("NCDL values:   0x%08X\n\n", hdr->config_ncdl);

	printf("%i bytes used / %i bytes available (%.2f%%)\n",
		hdr->len, NVRAM_SPACE - hdr->len,
		(100.00 / (double)NVRAM_SPACE) * (double)hdr->len);

	return 0;
}


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;
		}


	nvram = write ? nvram_open_staging() : nvram_open_rdonly();

	if( nvram != NULL && argc > 1 )
	{
		for( i = 1; i < argc; i++ )
		{
			if( !strcmp(argv[i], "show") )
			{
				stat = do_show(nvram);
				done++;
			}
			else if( !strcmp(argv[i], "info") )
			{
				stat = do_info(nvram);
				done++;
			}
			else if( !strcmp(argv[i], "get") || !strcmp(argv[i], "unset") || !strcmp(argv[i], "set") )
			{
				if( (i+1) < argc )
				{
					switch(argv[i++][0])
					{
						case 'g':
							stat = do_get(nvram, argv[i]);
							break;

						case 'u':
							stat = do_unset(nvram, argv[i]);
							break;

						case 's':
							stat = do_set(nvram, argv[i]);
							break;
					}
					done++;
				}
				else
				{
					fprintf(stderr, "Command '%s' requires an argument!\n", argv[i]);
					done = 0;
					break;
				}
			}
			else if( !strcmp(argv[i], "commit") )
			{
				commit = 1;
				done++;
			}
			else
			{
				fprintf(stderr, "Unknown option '%s' !\n", argv[i]);
				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 info\n"
			"	nvram get variable\n"
			"	nvram set variable=value [set ...]\n"
			"	nvram unset variable [unset ...]\n"
			"	nvram commit\n"
		);

		stat = 1;
	}

	return stat;
}