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d684c216 L |
1 | #include "common.h" |
2 | #include <string.h> | |
3 | #include <stdlib.h> | |
4 | ||
5 | #include <avr/eeprom.h> | |
6 | ||
7 | #include "config.h" | |
8 | #include "debug.h" | |
9 | #include "xmalloc.h" | |
10 | #include "crc.h" | |
11 | #include "command.h" | |
12 | ||
13 | #include "env.h" | |
14 | ||
15 | ||
323398b1 L |
16 | #define ENV_SIZE (CONFIG_ENV_SIZE - sizeof(uint16_t) -1) |
17 | #define ACTIVE_FLAG 1 | |
18 | #define OBSOLETE_FLAG 0 | |
d684c216 | 19 | |
7e24905c L |
20 | #define ENVLIST_DELETE (1<<0) |
21 | ||
d684c216 | 22 | |
534e1dfc L |
23 | /* |
24 | * Default Environment | |
25 | */ | |
1da3acc4 L |
26 | |
27 | #define DELIM "\0" | |
28 | ||
534e1dfc L |
29 | const FLASH char default_env[] = { |
30 | "bootdelay=" "3" DELIM | |
31 | "bootcmd=" "reset; loadf; go $(startaddr)" DELIM | |
32 | "baudrate=" "115200" DELIM | |
33 | "startaddr=" "0" DELIM | |
34 | DELIM | |
35 | }; | |
36 | ||
1da3acc4 | 37 | /* EEPROM storage */ |
d684c216 L |
38 | typedef struct environment_s { |
39 | uint16_t crc; /* CRC16 over data bytes */ | |
323398b1 | 40 | uint8_t flags; /* active/obsolete flags */ |
d684c216 L |
41 | char data[ENV_SIZE]; /* Environment data */ |
42 | } env_t; | |
43 | ||
44 | ||
1da3acc4 | 45 | /* */ |
d684c216 | 46 | typedef struct env_item_s { |
55027f3b | 47 | char * envvar; |
d684c216 L |
48 | } env_item_t; |
49 | ||
1da3acc4 | 50 | |
323398b1 | 51 | static uint8_t env_valid; |
d684c216 L |
52 | static env_item_t env_list[CONFIG_ENVVAR_MAX]; |
53 | static int entrycount; | |
54 | ||
55 | ||
1da3acc4 L |
56 | static |
57 | char env_get_char(uint16_t index) | |
d684c216 L |
58 | { |
59 | unsigned int off = CONFIG_ENV_OFFSET; | |
55027f3b | 60 | char ret; |
d684c216 | 61 | |
55027f3b L |
62 | switch (env_valid) { |
63 | case 2: | |
64 | off += CONFIG_ENV_SIZE; | |
65 | case 1: | |
66 | ret = (char) eeprom_read_byte((const uint8_t *)off + index + | |
d684c216 | 67 | offsetof(env_t, data)); |
55027f3b | 68 | break; |
d684c216 | 69 | |
55027f3b L |
70 | default: |
71 | ret = default_env[index]; | |
d684c216 | 72 | } |
d684c216 | 73 | |
55027f3b | 74 | return ret; |
d684c216 L |
75 | } |
76 | ||
d684c216 L |
77 | |
78 | static | |
79 | int comp_env_items(const void *m1, const void *m2) | |
80 | { | |
d684c216 L |
81 | env_item_t *ep1 = (env_item_t *) m1; |
82 | env_item_t *ep2 = (env_item_t *) m2; | |
7e24905c | 83 | |
55027f3b | 84 | return strcmp(ep1->envvar, ep2->envvar); |
d684c216 L |
85 | } |
86 | ||
1da3acc4 | 87 | |
7e24905c L |
88 | env_item_t *envlist_search(const MEMX char *name) |
89 | { | |
55027f3b L |
90 | env_item_t e; |
91 | ||
92 | e.envvar = (char *) name; | |
7e24905c L |
93 | |
94 | #ifdef __MEMX | |
95 | char buf[CONFIG_SYS_ENV_NAMELEN+1]; | |
96 | ||
97 | if (__builtin_avr_flash_segment(name) != -1) { | |
55027f3b | 98 | char *p = buf; |
7e24905c L |
99 | while ((*p++ = *name++) != '\0') |
100 | ; | |
55027f3b | 101 | e.envvar = buf; |
7e24905c L |
102 | } |
103 | #endif /* __MEMX */ | |
104 | ||
55027f3b L |
105 | return bsearch(&e, env_list, entrycount, |
106 | sizeof(env_item_t), comp_env_items); | |
7e24905c L |
107 | } |
108 | ||
109 | ||
110 | static | |
111 | env_item_t *envlist_enter(env_item_t *e) | |
112 | { | |
7e24905c L |
113 | const size_t size = sizeof(env_item_t); |
114 | env_item_t *ep; | |
115 | ||
55027f3b L |
116 | ep = bsearch(e, env_list, entrycount, |
117 | size, comp_env_items); | |
7e24905c L |
118 | |
119 | if (ep == NULL) { | |
120 | if (entrycount < CONFIG_ENVVAR_MAX) { | |
121 | ||
122 | env_list[entrycount++] = *e; | |
123 | qsort(env_list, entrycount, size, comp_env_items); | |
55027f3b L |
124 | ep = bsearch(e, env_list, entrycount, |
125 | size, comp_env_items); | |
7e24905c L |
126 | } |
127 | } else { | |
55027f3b L |
128 | free(ep->envvar); |
129 | ep->envvar = e->envvar; | |
7e24905c L |
130 | } |
131 | ||
132 | return ep; | |
133 | } | |
134 | ||
135 | ||
136 | static | |
137 | int env_item_delete(env_item_t *ep) | |
138 | { | |
139 | if (entrycount == 0) | |
140 | return -1; | |
55027f3b L |
141 | |
142 | free(ep->envvar); | |
7e24905c L |
143 | |
144 | entrycount--; | |
145 | size_t size = sizeof(env_item_t); | |
146 | memmove(ep, ep + 1, (env_list - ep)*size + entrycount*size); | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static | |
152 | int envlist_delete(const char *name) | |
153 | { | |
55027f3b L |
154 | env_item_t e; |
155 | ||
156 | e.envvar = (char *) name; | |
157 | ||
158 | env_item_t *ep = bsearch(&e, env_list, entrycount, | |
159 | sizeof(env_item_t), comp_env_items); | |
7e24905c L |
160 | |
161 | if (ep != NULL) | |
162 | return env_item_delete(ep); | |
163 | ||
164 | return 1; | |
165 | } | |
166 | ||
167 | ||
7e24905c L |
168 | |
169 | static | |
170 | int envlist_import(uint8_t flags) | |
d684c216 | 171 | { |
55027f3b L |
172 | uint16_t index; |
173 | ||
174 | int len; | |
1da3acc4 | 175 | env_item_t e; |
55027f3b L |
176 | char *np, c; |
177 | uint_fast8_t ef; | |
7e24905c L |
178 | |
179 | if ((flags & ENVLIST_DELETE) != 0) | |
180 | while (entrycount != 0) | |
181 | env_item_delete(&env_list[entrycount-1]); | |
182 | ||
55027f3b L |
183 | for (index = 0; env_get_char(index) != '\0'; ) { |
184 | for (len = 0; env_get_char(index + len) != '\0'; ++len) { | |
185 | if ((index + len) >= ENV_SIZE) | |
186 | return -1; | |
1da3acc4 | 187 | } |
d684c216 | 188 | |
55027f3b L |
189 | np = (char *) xmalloc(len+1); |
190 | if (np == NULL) { | |
191 | printf_P(PSTR("## Can't malloc %d bytes\n"), len+1); | |
192 | return 1; | |
d684c216 | 193 | } |
55027f3b L |
194 | e.envvar = np; |
195 | ef = 0; | |
196 | while ((c = env_get_char(index++)) != '\0') { | |
197 | if (!ef && (c == '=')) { | |
198 | *np = '\0'; | |
199 | ef = 1; | |
200 | } else | |
201 | *np = c; | |
202 | np++; | |
203 | } | |
204 | *np = '\0'; | |
205 | envlist_enter(&e); | |
d684c216 | 206 | } |
d684c216 | 207 | |
55027f3b | 208 | |
1da3acc4 L |
209 | return 0; |
210 | } | |
d684c216 L |
211 | |
212 | ||
1da3acc4 L |
213 | static |
214 | uint16_t env_crc(uint16_t data_offset) | |
323398b1 | 215 | { |
7e24905c | 216 | uint16_t crc; |
1da3acc4 L |
217 | uint16_t i; |
218 | char c, c0; | |
323398b1 | 219 | |
1da3acc4 L |
220 | crc = 0xffff; |
221 | c = 0xff; | |
222 | for (i = 0; !(c == 0 && c0 == 0) && i < ENV_SIZE; i++) | |
223 | { | |
7e24905c | 224 | c0 = c; |
1da3acc4 L |
225 | c = eeprom_read_byte((const uint8_t *) data_offset + i); |
226 | crc = crc16(crc, c); | |
323398b1 | 227 | } |
1da3acc4 L |
228 | return crc ; |
229 | } | |
323398b1 L |
230 | |
231 | ||
1da3acc4 L |
232 | /** |
233 | * return valid env | |
323398b1 | 234 | */ |
1da3acc4 L |
235 | static |
236 | int env_check_valid(void) | |
237 | { | |
238 | const uint16_t offset[2] = {CONFIG_ENV_OFFSET, | |
239 | CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE}; | |
240 | uint_fast8_t flags[2], crc_ok[2]; | |
241 | int rc; | |
242 | ||
243 | /* read FLAGS */ | |
244 | flags[0] = eeprom_read_byte ((uint8_t *) offset[0] + | |
245 | offsetof(env_t, flags)); | |
246 | flags[1] = eeprom_read_byte ((uint8_t *) offset[1] + | |
247 | offsetof(env_t, flags)); | |
248 | ||
249 | /* check CRC */ | |
250 | crc_ok[0] = ( | |
251 | eeprom_read_word((uint16_t *) offset[0] + | |
252 | offsetof(env_t, crc)) | |
253 | == env_crc(offset[0] + offsetof(env_t, data)) | |
254 | ); | |
255 | crc_ok[1] = ( | |
256 | eeprom_read_word((uint16_t *) offset[1] + | |
257 | offsetof(env_t, crc)) | |
258 | == env_crc(offset[1] + offsetof(env_t, data)) | |
259 | ); | |
323398b1 | 260 | |
1da3acc4 L |
261 | if (!crc_ok[0] && !crc_ok[1]) { |
262 | rc = 0; | |
323398b1 | 263 | |
1da3acc4 L |
264 | } else if (crc_ok[0] && !crc_ok[1]) { |
265 | rc = 1; | |
266 | } else if (!crc_ok[0] && crc_ok[1]) { | |
267 | rc = 2; | |
268 | } else { | |
269 | /* both ok - check serial */ | |
270 | #if 1 | |
271 | if (flags[1] == ACTIVE_FLAG && flags[0] != ACTIVE_FLAG) | |
272 | rc = 2; | |
273 | else if (flags[1] == OBSOLETE_FLAG && flags[0] == 0xFF) | |
274 | rc = 2; | |
275 | else | |
276 | rc = 1; | |
277 | #else | |
278 | if (flags[0] == ACTIVE_FLAG && flags[1] == OBSOLETE_FLAG) | |
279 | rc = 1; | |
280 | else if (flags[0] == OBSOLETE_FLAG && flags[1] == ACTIVE_FLAG) | |
281 | rc = 2; | |
282 | else if (flags[0] == 0xFF && flags[1] == 0) | |
283 | rc = 2; | |
284 | else if (flags[1] == 0xFF && flags[0] == 0) | |
285 | rc = 1; | |
286 | else /* flags are equal - almost impossible */ | |
287 | rc = 1; | |
288 | #endif | |
323398b1 | 289 | } |
7e24905c | 290 | |
1da3acc4 L |
291 | return rc; |
292 | } | |
323398b1 L |
293 | |
294 | ||
1da3acc4 | 295 | int env_init(void) |
323398b1 | 296 | { |
1da3acc4 L |
297 | env_valid = env_check_valid(); |
298 | if (env_valid == 0) { | |
55027f3b | 299 | printf_P(PSTR("*** Warning - bad CRC, " |
1da3acc4 | 300 | "using default environment\n\n")); |
d684c216 | 301 | } |
55027f3b | 302 | |
7e24905c L |
303 | envlist_import(ENVLIST_DELETE); |
304 | return 0; | |
323398b1 | 305 | } |
d684c216 | 306 | |
1da3acc4 | 307 | |
fc30b18e | 308 | char *getenv(const MEMX char *name) |
d684c216 L |
309 | { |
310 | env_item_t *ep; | |
311 | char *ret = NULL; | |
312 | ||
55027f3b | 313 | ep = envlist_search(name); |
d684c216 | 314 | if (ep != NULL) |
55027f3b | 315 | ret = ep->envvar + strlen(ep->envvar) +1; |
d684c216 L |
316 | return ret; |
317 | } | |
318 | ||
1da3acc4 L |
319 | static |
320 | int env_item_save(env_item_t *ep, uint16_t offset, int space_left) | |
323398b1 | 321 | { |
55027f3b L |
322 | int nlen, vlen; |
323 | char *var = ep->envvar; | |
323398b1 | 324 | |
55027f3b L |
325 | nlen = strlen(var); |
326 | if (nlen == 0) | |
1da3acc4 | 327 | return 0; |
55027f3b L |
328 | vlen = strlen(var + nlen + 1); |
329 | if (vlen == 0) | |
330 | return 0; | |
331 | if (nlen + vlen + 2 > space_left) | |
1da3acc4 | 332 | return 0; |
7e24905c | 333 | |
55027f3b L |
334 | eeprom_update_block(var, (uint8_t *) offset, nlen); |
335 | offset += nlen; | |
336 | eeprom_update_byte((uint8_t *) offset++, '='); | |
337 | eeprom_update_block(var + nlen +1, (uint8_t *) offset, vlen+1); | |
338 | ||
339 | return nlen + vlen + 2; | |
7e24905c | 340 | } |
1da3acc4 | 341 | |
323398b1 | 342 | |
1da3acc4 | 343 | static |
d684c216 L |
344 | int saveenv(void) |
345 | { | |
323398b1 L |
346 | unsigned int off = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; |
347 | unsigned int off_red = CONFIG_ENV_OFFSET; | |
348 | unsigned int pos; | |
349 | int len, left; | |
350 | uint16_t crc; | |
351 | int rc = 0; | |
d684c216 | 352 | |
323398b1 L |
353 | if (env_valid == 2) { |
354 | off = CONFIG_ENV_OFFSET; | |
355 | off_red = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; | |
356 | } | |
357 | ||
7e24905c | 358 | eeprom_update_byte((uint8_t *) off + offsetof(env_t, flags), 0xff); |
d684c216 | 359 | |
323398b1 L |
360 | pos = off + offsetof(env_t, data); |
361 | left = ENV_SIZE - 1; | |
362 | for (int i = 0 ; i < entrycount; i++) { | |
363 | len = env_item_save(&env_list[i], pos, left); | |
364 | if (len == 0) { | |
365 | return 1; | |
366 | } | |
367 | pos += len; | |
368 | left -= len; | |
369 | } | |
370 | /* terminate list */ | |
371 | eeprom_update_byte((uint8_t *) pos, 0); | |
372 | crc = env_crc(off + offsetof(env_t, data)); | |
373 | eeprom_update_word((uint16_t *) off + offsetof(env_t, crc), crc); | |
7e24905c | 374 | eeprom_update_byte((uint8_t *) off + offsetof(env_t, flags), |
323398b1 L |
375 | ACTIVE_FLAG); |
376 | ||
377 | if (rc == 0) { | |
7e24905c | 378 | eeprom_update_byte((uint8_t *) off_red + offsetof(env_t, flags), |
323398b1 L |
379 | OBSOLETE_FLAG); |
380 | env_valid = (env_valid == 2) ? 1 : 2; | |
323398b1 | 381 | } |
7e24905c | 382 | |
d684c216 L |
383 | return rc; |
384 | } | |
385 | ||
d684c216 | 386 | |
1da3acc4 L |
387 | static |
388 | int env_item_print(env_item_t *ep) | |
d684c216 | 389 | { |
1da3acc4 | 390 | int len; |
55027f3b L |
391 | char *ev = ep->envvar; |
392 | ||
393 | len = printf_P(PSTR("%s="), ev); | |
394 | len += printf_P(PSTR("%s\n"), ev + len); | |
1da3acc4 L |
395 | |
396 | return len; | |
7e24905c | 397 | } |
323398b1 L |
398 | |
399 | ||
d684c216 L |
400 | /* |
401 | * Command interface: print one or all environment variables | |
402 | * | |
403 | * Returns -1 in case of error, or length of printed string | |
404 | */ | |
7e24905c | 405 | static |
fc30b18e | 406 | int env_print(const MEMX char *name) |
d684c216 L |
407 | { |
408 | int len = -1; | |
409 | ||
410 | if (name) { /* print a single name */ | |
7e24905c | 411 | |
d684c216 L |
412 | env_item_t *ep = envlist_search(name); |
413 | if (ep != NULL) | |
414 | len = env_item_print(ep); | |
415 | ||
416 | } else { /* print whole list */ | |
417 | len = 0; | |
418 | for (int i = 0 ; i < entrycount; i++) { | |
419 | len += env_item_print(&env_list[i]); | |
420 | } | |
421 | } | |
422 | return len; | |
423 | } | |
424 | ||
1da3acc4 | 425 | |
d0581f88 | 426 | command_ret_t do_env_print(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
d684c216 | 427 | { |
d0581f88 | 428 | command_ret_t rc = CMD_RET_SUCCESS; |
d684c216 L |
429 | |
430 | (void) cmdtp; (void) flag; | |
431 | ||
432 | if (argc == 1) { | |
433 | /* print all env vars */ | |
d0581f88 L |
434 | int size = env_print(NULL); |
435 | if (size < 0) | |
436 | return CMD_RET_FAILURE; | |
d684c216 | 437 | printf_P(PSTR("\nEnvironment size: %d/%d bytes\n"), |
d0581f88 | 438 | size, ENV_SIZE); |
d0581f88 | 439 | return CMD_RET_SUCCESS; |
d684c216 L |
440 | } |
441 | ||
442 | /* print selected env vars */ | |
d0581f88 | 443 | for (int i = 1; i < argc; ++i) { |
d684c216 L |
444 | int rc = env_print(argv[i]); |
445 | if (rc < 0) { | |
446 | printf_P(PSTR("## Error: \"%s\" not defined\n"), argv[i]); | |
d0581f88 | 447 | rc = CMD_RET_FAILURE; |
d684c216 L |
448 | } |
449 | } | |
450 | ||
d0581f88 | 451 | return rc; |
d684c216 L |
452 | } |
453 | ||
454 | ||
72f58822 L |
455 | /** |
456 | * Set or delete environment variable | |
457 | * | |
d684c216 L |
458 | * Set a new environment variable, |
459 | * or replace or delete an existing one. | |
72f58822 L |
460 | * |
461 | * @param flag (not used) | |
462 | * @param argc | |
463 | * @param argv[1] Environment variable to set or delete | |
464 | * if no more args | |
465 | * @param argv[2] ... Value to set it to | |
466 | * | |
467 | * @return 0 if ok, 1 on error | |
d684c216 | 468 | */ |
1da3acc4 | 469 | static |
d0581f88 | 470 | command_ret_t _do_env_set(int flag, int argc, char * const argv[]) |
d684c216 | 471 | { |
72f58822 | 472 | int i, len; |
55027f3b | 473 | char *name, *value, *valp, *p; |
d684c216 L |
474 | env_item_t e, *ep; |
475 | ||
476 | (void) flag; | |
477 | debug("Initial value for argc=%d\n", argc); | |
478 | ||
479 | name = argv[1]; | |
480 | value = argv[2]; | |
481 | ||
482 | if (strchr(name, '=')) { | |
483 | printf_P(PSTR("## Error: illegal character '='" | |
484 | "in variable name \"%s\"\n"), name); | |
d0581f88 | 485 | return CMD_RET_FAILURE; |
d684c216 | 486 | } |
55027f3b L |
487 | len = strlen(name); |
488 | if (len > CONFIG_SYS_ENV_NAMELEN) { | |
d684c216 L |
489 | printf_P(PSTR("## Error: Variable name \"%s\" too long. " |
490 | "(max %d characters)\n"), name, CONFIG_SYS_ENV_NAMELEN); | |
d0581f88 | 491 | return CMD_RET_FAILURE; |
d684c216 L |
492 | } |
493 | /* | |
494 | env_id++; | |
495 | */ | |
496 | /* Delete only ? */ | |
497 | if (argc < 3 || argv[2] == NULL) { | |
498 | int rc = envlist_delete(name); | |
d0581f88 | 499 | return rc ? CMD_RET_FAILURE : CMD_RET_SUCCESS; |
d684c216 L |
500 | } |
501 | ||
502 | /* | |
503 | * Insert / replace new value | |
504 | */ | |
55027f3b | 505 | for (i = 2, len += 1; i < argc; ++i) |
d684c216 L |
506 | len += strlen(argv[i]) + 1; |
507 | ||
508 | value = xmalloc(len); | |
509 | if (value == NULL) { | |
510 | printf_P(PSTR("## Can't malloc %d bytes\n"), len); | |
d0581f88 | 511 | return CMD_RET_FAILURE; |
d684c216 | 512 | } |
55027f3b L |
513 | strcpy(value, name); |
514 | valp = value + strlen(name) + 1; | |
515 | for (i = 2, p = valp; i < argc; ++i) { | |
d684c216 L |
516 | char *v = argv[i]; |
517 | ||
55027f3b | 518 | while ((*p++ = *v++) != '\0') |
d684c216 | 519 | ; |
55027f3b | 520 | *(p - 1) = ' '; |
d684c216 | 521 | } |
55027f3b L |
522 | if (p != valp) |
523 | *--p = '\0'; | |
d684c216 | 524 | |
55027f3b | 525 | e.envvar = value; |
d684c216 L |
526 | ep = envlist_enter(&e); |
527 | if (!ep) { | |
528 | printf_P(PSTR("## Error inserting \"%s\" variable.\n"), | |
529 | name); | |
d0581f88 | 530 | return CMD_RET_FAILURE; |
d684c216 L |
531 | } |
532 | ||
d0581f88 | 533 | return CMD_RET_SUCCESS; |
d684c216 L |
534 | } |
535 | ||
72f58822 L |
536 | /** |
537 | * Set an environment variable | |
538 | * | |
539 | * @param varname Environment variable to set | |
540 | * @param varvalue Value to set it to | |
541 | * @return 0 if ok, 1 on error | |
542 | */ | |
1da3acc4 | 543 | static |
d684c216 L |
544 | int setenv(const char *varname, const char *varvalue) |
545 | { | |
546 | const char * const argv[3] = { NULL, varname, varvalue }; | |
547 | int argc = 3; | |
548 | ||
549 | if (varvalue == NULL || varvalue[0] == '\0') | |
550 | --argc; | |
7e24905c | 551 | |
d0581f88 | 552 | return (int) _do_env_set(0, argc, (char * const *)argv); |
d684c216 L |
553 | } |
554 | ||
555 | #if 0 | |
556 | /** | |
557 | * Set an environment variable to an integer value | |
558 | * | |
559 | * @param varname Environment variable to set | |
560 | * @param value Value to set it to | |
561 | * @return 0 if ok, 1 on error | |
562 | */ | |
563 | int setenv_ulong(const char *varname, unsigned long value) | |
564 | { | |
565 | /* TODO: this should be unsigned */ | |
566 | char *str = simple_itoa(value); | |
567 | ||
568 | return setenv(varname, str); | |
569 | } | |
570 | #endif | |
571 | ||
572 | ||
573 | /** | |
574 | * Set an environment variable to an value in hex | |
575 | * | |
576 | * @param varname Environment variable to set | |
577 | * @param value Value to set it to | |
578 | * @return 0 if ok, 1 on error | |
579 | */ | |
fc30b18e | 580 | int setenv_hex(const MEMX char *varname, unsigned long value) |
d684c216 L |
581 | { |
582 | char str[sizeof(unsigned long) *2 + 1]; | |
583 | ||
584 | sprintf_P(str, PSTR("%lx"), value); | |
585 | return setenv(varname, str); | |
586 | } | |
587 | ||
35e9ec0c | 588 | |
72f58822 | 589 | /** |
35e9ec0c | 590 | * Decode the integer value of an environment variable and return it. |
72f58822 | 591 | * |
35e9ec0c L |
592 | * @param name Name of environemnt variable |
593 | * @param base Number base to use (normally 10, or 16 for hex) | |
594 | * @param default_val Default value to return if the variable is not | |
595 | * found | |
596 | * @return the decoded value, or default_val if not found | |
72f58822 | 597 | */ |
fc30b18e | 598 | unsigned long getenv_ulong(const MEMX char *name, int base, unsigned long default_val) |
d684c216 | 599 | { |
d684c216 | 600 | unsigned long value; |
35e9ec0c L |
601 | char *vp, *endp; |
602 | ||
603 | env_item_t *ep = envlist_search(name); | |
d684c216 | 604 | |
35e9ec0c | 605 | if (ep != NULL ) { |
55027f3b L |
606 | vp = ep->envvar + strlen(ep->envvar) +1; |
607 | value = strtoul(vp, &endp, base); | |
608 | if (endp != vp) | |
609 | return value; | |
35e9ec0c | 610 | } |
d684c216 | 611 | |
35e9ec0c | 612 | return default_val; |
d684c216 L |
613 | } |
614 | ||
35e9ec0c | 615 | |
d0581f88 | 616 | command_ret_t do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
d684c216 L |
617 | { |
618 | (void) cmdtp; | |
619 | ||
620 | if (argc < 2) | |
621 | return CMD_RET_USAGE; | |
622 | ||
623 | return _do_env_set(flag, argc, argv); | |
624 | } | |
625 | ||
626 | ||
7e24905c L |
627 | command_ret_t do_env_default(cmd_tbl_t *cmdtp, int flag, |
628 | int argc, char * const argv[]) | |
629 | { | |
630 | (void) cmdtp; (void) flag; (void) argc; (void) argv; | |
631 | ||
55027f3b L |
632 | uint8_t tmp = env_valid; |
633 | env_valid = 0; | |
634 | ||
7e24905c | 635 | /* Reset the whole environment */ |
55027f3b | 636 | printf_P(PSTR("## Resetting to default environment\n")); |
7e24905c L |
637 | envlist_import(ENVLIST_DELETE); |
638 | ||
55027f3b L |
639 | env_valid = tmp; |
640 | ||
7e24905c L |
641 | return CMD_RET_SUCCESS; |
642 | } | |
643 | ||
55027f3b | 644 | |
d0581f88 | 645 | command_ret_t do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) |
323398b1 L |
646 | { |
647 | (void) cmdtp; (void) flag; (void) argc; (void) argv; | |
648 | ||
649 | printf_P(PSTR("Saving Environment ...\n")); | |
d0581f88 | 650 | return saveenv() ? CMD_RET_FAILURE : CMD_RET_SUCCESS; |
323398b1 L |
651 | } |
652 | ||
55027f3b | 653 | |
7e24905c | 654 | #if defined(CONFIG_AUTO_COMPLETE) |
d684c216 L |
655 | int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf) |
656 | { | |
657 | ENTRY *match; | |
658 | int found, idx; | |
659 | ||
660 | idx = 0; | |
661 | found = 0; | |
662 | cmdv[0] = NULL; | |
663 | ||
664 | while ((idx = hmatch_r(var, idx, &match, &env_htab))) { | |
665 | int vallen = strlen(match->key) + 1; | |
666 | ||
667 | if (found >= maxv - 2 || bufsz < vallen) | |
668 | break; | |
669 | ||
670 | cmdv[found++] = buf; | |
671 | memcpy(buf, match->key, vallen); | |
672 | buf += vallen; | |
673 | bufsz -= vallen; | |
674 | } | |
675 | ||
676 | qsort(cmdv, found, sizeof(cmdv[0]), strcmp_compar); | |
677 | ||
678 | if (idx) | |
679 | cmdv[found++] = "..."; | |
680 | ||
681 | cmdv[found] = NULL; | |
682 | return found; | |
683 | } | |
684 | #endif |