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1 | /* | |
2 | * (C) Copyright 2014 Leo C. <erbl259-lmu@yahoo.de> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0 | |
5 | */ | |
6 | ||
7 | #include "common.h" | |
8 | #include <string.h> | |
9 | #include <stdlib.h> | |
10 | #include <stdbool.h> | |
11 | #include <avr/eeprom.h> | |
12 | ||
13 | #include "config.h" | |
14 | #include "debug.h" | |
15 | #include "xmalloc.h" | |
16 | #include "crc.h" | |
17 | #include "getopt-min.h" | |
18 | #include "command.h" | |
19 | #include "env.h" | |
20 | ||
21 | ||
22 | #define ENV_SIZE (CONFIG_ENV_SIZE - sizeof(uint16_t) -1) | |
23 | #define ACTIVE_FLAG 1 | |
24 | #define OBSOLETE_FLAG 0 | |
25 | ||
26 | #define ENVLIST_DELETE (1<<0) | |
27 | ||
28 | ||
29 | /* | |
30 | * Default Environment | |
31 | */ | |
32 | ||
33 | #define DELIM "\0" | |
34 | ||
35 | const FLASH char default_env[] = { | |
36 | ENV_BAUDRATE "=" "115200" DELIM | |
37 | ENV_BOOTDELAY "=" "3" DELIM | |
38 | ENV_BOOTCMD "=" "pin ${pins}; loadcpm3; go ${startaddress}" DELIM | |
39 | ENV_CPM3_SYSFILE "=" CONFIG_CPM3_SYSFILE DELIM | |
40 | ENV_PINALIAS "=" "0:PG5,1:PG4,2:PB4,3:PB5,4:PB6,5:PB7," | |
41 | "6:PG3,7:PG2,8:PG1,9:PG0,10:PE7" DELIM | |
42 | ENV_STARTADDRESS "=" "0" DELIM | |
43 | "pins" "=" "2,8 low 9 high 3 2" DELIM | |
44 | DELIM | |
45 | }; | |
46 | ||
47 | ||
48 | /* EEPROM storage */ | |
49 | typedef struct environment_s { | |
50 | uint16_t crc; /* CRC16 over data bytes */ | |
51 | uint8_t flags; /* active/obsolete flags */ | |
52 | char data[ENV_SIZE]; /* Environment data */ | |
53 | } env_t; | |
54 | ||
55 | ||
56 | /* */ | |
57 | typedef struct env_item_s { | |
58 | char * envvar; | |
59 | } env_item_t; | |
60 | ||
61 | ||
62 | static uint8_t env_valid; | |
63 | static env_item_t env_list[CONFIG_ENVVAR_MAX]; | |
64 | static int entrycount; | |
65 | ||
66 | ||
67 | static | |
68 | char env_get_char(uint16_t index) | |
69 | { | |
70 | unsigned int off = CONFIG_ENV_OFFSET; | |
71 | char ret; | |
72 | ||
73 | switch (env_valid) { | |
74 | case 2: | |
75 | off += CONFIG_ENV_SIZE; | |
76 | case 1: | |
77 | ret = (char) eeprom_read_byte((const uint8_t *)off + index + | |
78 | offsetof(env_t, data)); | |
79 | break; | |
80 | ||
81 | default: | |
82 | ret = default_env[index]; | |
83 | } | |
84 | ||
85 | return ret; | |
86 | } | |
87 | ||
88 | ||
89 | static const FLASH char *comp_key; | |
90 | ||
91 | static | |
92 | int comp_env_items(const void *m1, const void *m2) | |
93 | { | |
94 | env_item_t *ep1 = (env_item_t *) m1; | |
95 | env_item_t *ep2 = (env_item_t *) m2; | |
96 | ||
97 | if (ep1 == NULL) | |
98 | return - strcmp_P(ep2->envvar, comp_key); | |
99 | else | |
100 | return strcmp(ep1->envvar, ep2->envvar); | |
101 | } | |
102 | ||
103 | ||
104 | env_item_t *envlist_search(const MEMX char *name) | |
105 | { | |
106 | #ifdef __MEMX | |
107 | if (__builtin_avr_flash_segment(name) != -1) { | |
108 | comp_key = name; | |
109 | return bsearch(0, env_list, entrycount, | |
110 | sizeof(env_item_t), comp_env_items); | |
111 | } else { | |
112 | ||
113 | env_item_t e; | |
114 | e.envvar = (char *) name; | |
115 | ||
116 | return bsearch(&e, env_list, entrycount, | |
117 | sizeof(env_item_t), comp_env_items); | |
118 | } | |
119 | #else | |
120 | env_item_t e; | |
121 | e.envvar = (char *) name; | |
122 | ||
123 | return bsearch(&e, env_list, entrycount, | |
124 | sizeof(env_item_t), comp_env_items); | |
125 | #endif /* __MEMX */ | |
126 | } | |
127 | ||
128 | ||
129 | static | |
130 | env_item_t *envlist_enter(env_item_t *e) | |
131 | { | |
132 | const size_t size = sizeof(env_item_t); | |
133 | env_item_t *ep; | |
134 | ||
135 | ep = bsearch(e, env_list, entrycount, | |
136 | size, comp_env_items); | |
137 | ||
138 | if (ep == NULL) { | |
139 | if (entrycount < CONFIG_ENVVAR_MAX) { | |
140 | ||
141 | env_list[entrycount++] = *e; | |
142 | qsort(env_list, entrycount, size, comp_env_items); | |
143 | ep = bsearch(e, env_list, entrycount, | |
144 | size, comp_env_items); | |
145 | } | |
146 | } else { | |
147 | free(ep->envvar); | |
148 | ep->envvar = e->envvar; | |
149 | } | |
150 | ||
151 | return ep; | |
152 | } | |
153 | ||
154 | ||
155 | static | |
156 | int env_item_delete(env_item_t *ep) | |
157 | { | |
158 | if (entrycount == 0) | |
159 | return -1; | |
160 | ||
161 | free(ep->envvar); | |
162 | ||
163 | entrycount--; | |
164 | size_t size = sizeof(env_item_t); | |
165 | memmove(ep, ep + 1, (env_list - ep)*size + entrycount*size); | |
166 | ||
167 | return 0; | |
168 | } | |
169 | ||
170 | static | |
171 | int envlist_delete(const MEMX char *name) | |
172 | { | |
173 | env_item_t *ep = envlist_search(name); | |
174 | ||
175 | if (ep != NULL) | |
176 | return env_item_delete(ep); | |
177 | ||
178 | return 1; | |
179 | } | |
180 | ||
181 | ||
182 | ||
183 | static | |
184 | int envlist_import(uint8_t flags) | |
185 | { | |
186 | uint16_t index; | |
187 | ||
188 | int len; | |
189 | env_item_t e; | |
190 | char *np, c; | |
191 | uint_fast8_t ef; | |
192 | ||
193 | if ((flags & ENVLIST_DELETE) != 0) | |
194 | while (entrycount != 0) | |
195 | env_item_delete(&env_list[entrycount-1]); | |
196 | ||
197 | for (index = 0; env_get_char(index) != '\0'; ) { | |
198 | for (len = 0; env_get_char(index + len) != '\0'; ++len) { | |
199 | if ((index + len) >= ENV_SIZE) | |
200 | return -1; | |
201 | } | |
202 | ||
203 | np = (char *) xmalloc(len+1); | |
204 | if (np == NULL) { | |
205 | printf_P(PSTR("## Can't malloc %d bytes\n"), len+1); | |
206 | return 1; | |
207 | } | |
208 | e.envvar = np; | |
209 | ef = 0; | |
210 | while ((c = env_get_char(index++)) != '\0') { | |
211 | if (!ef && (c == '=')) { | |
212 | *np = '\0'; | |
213 | ef = 1; | |
214 | } else | |
215 | *np = c; | |
216 | np++; | |
217 | } | |
218 | *np = '\0'; | |
219 | envlist_enter(&e); | |
220 | } | |
221 | ||
222 | ||
223 | return 0; | |
224 | } | |
225 | ||
226 | ||
227 | static | |
228 | uint16_t env_crc(uint16_t data_offset) | |
229 | { | |
230 | uint16_t crc; | |
231 | uint16_t i; | |
232 | char c, c0; | |
233 | ||
234 | crc = 0xffff; | |
235 | c = 0xff; | |
236 | for (i = 0; !(c == 0 && c0 == 0) && i < ENV_SIZE; i++) | |
237 | { | |
238 | c0 = c; | |
239 | c = eeprom_read_byte((const uint8_t *) data_offset + i); | |
240 | crc = crc16(crc, c); | |
241 | } | |
242 | return crc ; | |
243 | } | |
244 | ||
245 | ||
246 | /** | |
247 | * return valid env | |
248 | */ | |
249 | static | |
250 | int env_check_valid(void) | |
251 | { | |
252 | const uint16_t offset[2] = {CONFIG_ENV_OFFSET, | |
253 | CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE}; | |
254 | uint_fast8_t flags[2], crc_ok[2]; | |
255 | int rc; | |
256 | ||
257 | /* read FLAGS */ | |
258 | flags[0] = eeprom_read_byte ((uint8_t *) offset[0] + | |
259 | offsetof(env_t, flags)); | |
260 | flags[1] = eeprom_read_byte ((uint8_t *) offset[1] + | |
261 | offsetof(env_t, flags)); | |
262 | ||
263 | /* check CRC */ | |
264 | crc_ok[0] = ( | |
265 | eeprom_read_word((uint16_t *) offset[0] + | |
266 | offsetof(env_t, crc)) | |
267 | == env_crc(offset[0] + offsetof(env_t, data)) | |
268 | ); | |
269 | crc_ok[1] = ( | |
270 | eeprom_read_word((uint16_t *) offset[1] + | |
271 | offsetof(env_t, crc)) | |
272 | == env_crc(offset[1] + offsetof(env_t, data)) | |
273 | ); | |
274 | ||
275 | if (!crc_ok[0] && !crc_ok[1]) { | |
276 | rc = 0; | |
277 | ||
278 | } else if (crc_ok[0] && !crc_ok[1]) { | |
279 | rc = 1; | |
280 | } else if (!crc_ok[0] && crc_ok[1]) { | |
281 | rc = 2; | |
282 | } else { | |
283 | /* both ok - check serial */ | |
284 | #if 1 | |
285 | if (flags[1] == ACTIVE_FLAG && flags[0] != ACTIVE_FLAG) | |
286 | rc = 2; | |
287 | else if (flags[1] == OBSOLETE_FLAG && flags[0] == 0xFF) | |
288 | rc = 2; | |
289 | else | |
290 | rc = 1; | |
291 | #else | |
292 | if (flags[0] == ACTIVE_FLAG && flags[1] == OBSOLETE_FLAG) | |
293 | rc = 1; | |
294 | else if (flags[0] == OBSOLETE_FLAG && flags[1] == ACTIVE_FLAG) | |
295 | rc = 2; | |
296 | else if (flags[0] == 0xFF && flags[1] == 0) | |
297 | rc = 2; | |
298 | else if (flags[1] == 0xFF && flags[0] == 0) | |
299 | rc = 1; | |
300 | else /* flags are equal - almost impossible */ | |
301 | rc = 1; | |
302 | #endif | |
303 | } | |
304 | ||
305 | return rc; | |
306 | } | |
307 | ||
308 | ||
309 | int env_init(void) | |
310 | { | |
311 | env_valid = env_check_valid(); | |
312 | if (env_valid == 0) { | |
313 | printf_P(PSTR("*** Warning - bad CRC, " | |
314 | "using default environment\n\n")); | |
315 | } | |
316 | ||
317 | envlist_import(ENVLIST_DELETE); | |
318 | return 0; | |
319 | } | |
320 | ||
321 | ||
322 | char *getenv_str(const MEMX char *name) | |
323 | { | |
324 | env_item_t *ep; | |
325 | char *ret = NULL; | |
326 | ||
327 | ep = envlist_search(name); | |
328 | if (ep != NULL) | |
329 | ret = ep->envvar + strlen(ep->envvar) +1; | |
330 | return ret; | |
331 | } | |
332 | ||
333 | static | |
334 | int env_item_save(env_item_t *ep, uint16_t offset, int space_left) | |
335 | { | |
336 | int nlen, vlen; | |
337 | char *var = ep->envvar; | |
338 | ||
339 | nlen = strlen(var); | |
340 | if (nlen == 0) | |
341 | return 0; | |
342 | vlen = strlen(var + nlen + 1); | |
343 | if (vlen == 0) | |
344 | return 0; | |
345 | if (nlen + vlen + 2 > space_left) | |
346 | return 0; | |
347 | ||
348 | eeprom_update_block(var, (uint8_t *) offset, nlen); | |
349 | offset += nlen; | |
350 | eeprom_update_byte((uint8_t *) offset++, '='); | |
351 | eeprom_update_block(var + nlen +1, (uint8_t *) offset, vlen+1); | |
352 | ||
353 | return nlen + vlen + 2; | |
354 | } | |
355 | ||
356 | ||
357 | static | |
358 | int saveenv(void) | |
359 | { | |
360 | unsigned int off = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; | |
361 | unsigned int off_red = CONFIG_ENV_OFFSET; | |
362 | unsigned int pos; | |
363 | int len, left; | |
364 | uint16_t crc; | |
365 | int rc = 0; | |
366 | ||
367 | if (env_valid == 2) { | |
368 | off = CONFIG_ENV_OFFSET; | |
369 | off_red = CONFIG_ENV_OFFSET + CONFIG_ENV_SIZE; | |
370 | } | |
371 | ||
372 | eeprom_update_byte((uint8_t *) off + offsetof(env_t, flags), 0xff); | |
373 | ||
374 | pos = off + offsetof(env_t, data); | |
375 | left = ENV_SIZE - 1; | |
376 | for (int i = 0 ; i < entrycount; i++) { | |
377 | len = env_item_save(&env_list[i], pos, left); | |
378 | if (len == 0) { | |
379 | return 1; | |
380 | } | |
381 | pos += len; | |
382 | left -= len; | |
383 | } | |
384 | /* terminate list */ | |
385 | eeprom_update_byte((uint8_t *) pos, 0); | |
386 | crc = env_crc(off + offsetof(env_t, data)); | |
387 | eeprom_update_word((uint16_t *) off + offsetof(env_t, crc), crc); | |
388 | eeprom_update_byte((uint8_t *) off + offsetof(env_t, flags), | |
389 | ACTIVE_FLAG); | |
390 | ||
391 | if (rc == 0) { | |
392 | eeprom_update_byte((uint8_t *) off_red + offsetof(env_t, flags), | |
393 | OBSOLETE_FLAG); | |
394 | env_valid = (env_valid == 2) ? 1 : 2; | |
395 | } | |
396 | ||
397 | return rc; | |
398 | } | |
399 | ||
400 | ||
401 | static | |
402 | int env_item_print(env_item_t *ep, bool mode) | |
403 | { | |
404 | int len; | |
405 | char *ev = ep->envvar; | |
406 | ||
407 | if (mode) { | |
408 | len = printf_P(PSTR("setenv %s "), ev) - 7; | |
409 | len += printf_P(PSTR("'%s'\n"), ev + len) - 2; | |
410 | } else { | |
411 | len = printf_P(PSTR("%s="), ev); | |
412 | len += printf_P(PSTR("%s\n"), ev + len); | |
413 | } | |
414 | return len; | |
415 | } | |
416 | ||
417 | ||
418 | /* | |
419 | * Command interface: print one or all environment variables | |
420 | * | |
421 | * Returns -1 in case of error, or length of printed string | |
422 | */ | |
423 | static | |
424 | int env_print(const MEMX char *name, bool mode) | |
425 | { | |
426 | int len = -1; | |
427 | ||
428 | if (name) { /* print a single name */ | |
429 | ||
430 | env_item_t *ep = envlist_search(name); | |
431 | if (ep != NULL) | |
432 | len = env_item_print(ep, mode); | |
433 | ||
434 | } else { /* print whole list */ | |
435 | len = 0; | |
436 | for (int i = 0 ; i < entrycount; i++) { | |
437 | len += env_item_print(&env_list[i], mode); | |
438 | } | |
439 | } | |
440 | return len; | |
441 | } | |
442 | ||
443 | ||
444 | /** | |
445 | * Set or delete environment variable | |
446 | * | |
447 | * Set a new environment variable, | |
448 | * or replace or delete an existing one. | |
449 | * | |
450 | * @param flag (not used) | |
451 | * @param argc | |
452 | * @param argv[1] Environment variable to set or delete | |
453 | * if no more args | |
454 | * @param argv[2] ... Value to set it to | |
455 | * | |
456 | * @return 0 if ok, 1 on error | |
457 | */ | |
458 | static | |
459 | command_ret_t _do_env_set(int flag, int argc, char * const argv[]) | |
460 | { | |
461 | int i, len; | |
462 | char *name, *value, *valp, *p; | |
463 | env_item_t e, *ep; | |
464 | ||
465 | (void) flag; | |
466 | ||
467 | name = argv[1]; | |
468 | value = argv[2]; | |
469 | ||
470 | if (strchr(name, '=')) { | |
471 | printf_P(PSTR("## Error: illegal character '='" | |
472 | "in variable name \"%s\"\n"), name); | |
473 | return CMD_RET_FAILURE; | |
474 | } | |
475 | len = strlen(name); | |
476 | if (len > CONFIG_SYS_ENV_NAMELEN) { | |
477 | printf_P(PSTR("## Error: Variable name \"%s\" too long. " | |
478 | "(max %d characters)\n"), name, CONFIG_SYS_ENV_NAMELEN); | |
479 | return CMD_RET_FAILURE; | |
480 | } | |
481 | /* | |
482 | env_id++; | |
483 | */ | |
484 | /* Delete only ? */ | |
485 | if (argc < 3 || argv[2] == NULL) { | |
486 | int rc = envlist_delete(name); | |
487 | return rc ? CMD_RET_FAILURE : CMD_RET_SUCCESS; | |
488 | } | |
489 | ||
490 | /* | |
491 | * Insert / replace new value | |
492 | */ | |
493 | for (i = 2, len += 1; i < argc; ++i) | |
494 | len += strlen(argv[i]) + 1; | |
495 | ||
496 | value = xmalloc(len); | |
497 | if (value == NULL) { | |
498 | printf_P(PSTR("## Can't malloc %d bytes\n"), len); | |
499 | return CMD_RET_FAILURE; | |
500 | } | |
501 | strcpy(value, name); | |
502 | valp = value + strlen(name) + 1; | |
503 | for (i = 2, p = valp; i < argc; ++i) { | |
504 | char *v = argv[i]; | |
505 | ||
506 | while ((*p++ = *v++) != '\0') | |
507 | ; | |
508 | *(p - 1) = ' '; | |
509 | } | |
510 | if (p != valp) | |
511 | *--p = '\0'; | |
512 | ||
513 | e.envvar = value; | |
514 | ep = envlist_enter(&e); | |
515 | if (!ep) { | |
516 | printf_P(PSTR("## Error inserting \"%s\" variable.\n"), | |
517 | name); | |
518 | return CMD_RET_FAILURE; | |
519 | } | |
520 | ||
521 | return CMD_RET_SUCCESS; | |
522 | } | |
523 | ||
524 | /** | |
525 | * Set an environment variable | |
526 | * | |
527 | * @param varname Environment variable to set | |
528 | * @param varvalue Value to set it to | |
529 | * @return 0 if ok, 1 on error | |
530 | */ | |
531 | static | |
532 | int setenv(const MEMX char *varname, const char *varvalue) | |
533 | { | |
534 | int rc; | |
535 | ||
536 | #ifdef __MEMX | |
537 | char *tmpname = NULL; | |
538 | if (__builtin_avr_flash_segment(varname) != -1) { | |
539 | tmpname = malloc(strlen_P(varname)+1); | |
540 | if (tmpname == NULL) { | |
541 | printf_P(PSTR("setenv: Out of Memory!\n")); | |
542 | return 1; | |
543 | } | |
544 | strcpy_P(tmpname, varname); | |
545 | } else | |
546 | tmpname = (char *) varname; | |
547 | #endif | |
548 | ||
549 | const char * const argv[3] = { NULL, tmpname, varvalue }; | |
550 | int argc = 3; | |
551 | ||
552 | if (varvalue == NULL || varvalue[0] == '\0') | |
553 | --argc; | |
554 | ||
555 | rc = (int) _do_env_set(0, argc, (char * const *)argv); | |
556 | ||
557 | #ifdef __MEMX | |
558 | free(tmpname); | |
559 | #endif | |
560 | return rc; | |
561 | } | |
562 | ||
563 | /** | |
564 | * Set an environment variable to an integer value | |
565 | * | |
566 | * @param name Environment variable to set | |
567 | * @param value Value to set it to | |
568 | * @param radix Base | |
569 | * @return 0 if ok, 1 on error | |
570 | */ | |
571 | static | |
572 | int setenv_intval(const MEMX char *name, unsigned long value, int radix) | |
573 | { | |
574 | char buf[11]; | |
575 | ||
576 | ultoa(value, buf, radix); | |
577 | ||
578 | return setenv(name, buf); | |
579 | } | |
580 | ||
581 | /** | |
582 | * Set an environment variable to a decimal integer value | |
583 | * | |
584 | * @param name Environment variable to set | |
585 | * @param value Value to set it to | |
586 | * @return 0 if ok, 1 on error | |
587 | */ | |
588 | int setenv_ulong(const MEMX char *name, unsigned long value) | |
589 | { | |
590 | return setenv_intval(name, value, 10); | |
591 | } | |
592 | ||
593 | ||
594 | /** | |
595 | * Set an environment variable to a value in hex | |
596 | * | |
597 | * @param name Environment variable to set | |
598 | * @param value Value to set it to | |
599 | * @return 0 if ok, 1 on error | |
600 | */ | |
601 | int setenv_hex(const MEMX char *name, unsigned long value) | |
602 | { | |
603 | return setenv_intval(name, value, 16); | |
604 | } | |
605 | ||
606 | ||
607 | /** | |
608 | * Decode the integer value of an environment variable and return it. | |
609 | * | |
610 | * @param name Name of environemnt variable | |
611 | * @param base Number base to use (normally 10, or 16 for hex) | |
612 | * @param default_val Default value to return if the variable is not | |
613 | * found | |
614 | * @return the decoded value, or default_val if not found | |
615 | */ | |
616 | unsigned long getenv_ulong(const MEMX char *name, int base, unsigned long default_val) | |
617 | { | |
618 | unsigned long value; | |
619 | char *vp, *endp; | |
620 | ||
621 | env_item_t *ep = envlist_search(name); | |
622 | ||
623 | if (ep != NULL ) { | |
624 | vp = ep->envvar + strlen(ep->envvar) +1; | |
625 | value = strtoul(vp, &endp, base); | |
626 | if (endp != vp) | |
627 | return value; | |
628 | } | |
629 | ||
630 | return default_val; | |
631 | } | |
632 | ||
633 | ||
634 | /* | |
635 | * Read an environment variable as a boolean | |
636 | */ | |
637 | bool getenv_yesno(const MEMX char *name) | |
638 | { | |
639 | char *s = getenv_str(name); | |
640 | ||
641 | if (s == NULL) | |
642 | return false; | |
643 | ||
644 | return strchr_P(PSTR("1yYtT"), *s) != NULL; | |
645 | ||
646 | /* | |
647 | return *s == '1' || *s == 'y' || *s == 'Y' || *s == 't' || *s == 'T' ? | |
648 | 1 : 0; | |
649 | */ | |
650 | } | |
651 | ||
652 | command_ret_t do_env_print(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
653 | { | |
654 | (void) cmdtp; (void) flag; | |
655 | ||
656 | bool mode = 0; | |
657 | command_ret_t rc = CMD_RET_SUCCESS; | |
658 | ||
659 | /* reset getopt() */ | |
660 | optind = 0; | |
661 | ||
662 | int opt; | |
663 | while ((opt = getopt(argc, argv, PSTR("s"))) != -1) { | |
664 | switch (opt) { | |
665 | case 's': | |
666 | mode = 1; | |
667 | break; | |
668 | default: /* '?' */ | |
669 | return CMD_RET_USAGE; | |
670 | } | |
671 | } | |
672 | ||
673 | if (optind == argc) { | |
674 | /* print all env vars */ | |
675 | int size = env_print(NULL, mode); | |
676 | if (size < 0) | |
677 | return CMD_RET_FAILURE; | |
678 | if (mode == 0) | |
679 | printf_P(PSTR("\nEnvironment size: %d/%d bytes\n"), | |
680 | size, ENV_SIZE); | |
681 | return CMD_RET_SUCCESS; | |
682 | } | |
683 | ||
684 | /* print selected env vars */ | |
685 | while (optind < argc) { | |
686 | int rc = env_print(argv[optind], mode); | |
687 | if (rc < 0) { | |
688 | printf_P(PSTR("## Error: \"%s\" not defined\n"), argv[optind]); | |
689 | rc = CMD_RET_FAILURE; | |
690 | } | |
691 | optind++; | |
692 | } | |
693 | ||
694 | return rc; | |
695 | } | |
696 | ||
697 | ||
698 | command_ret_t do_env_set(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
699 | { | |
700 | (void) cmdtp; | |
701 | ||
702 | if (argc < 2) | |
703 | return CMD_RET_USAGE; | |
704 | ||
705 | return _do_env_set(flag, argc, argv); | |
706 | } | |
707 | ||
708 | ||
709 | command_ret_t do_env_default(cmd_tbl_t *cmdtp, int flag, | |
710 | int argc, char * const argv[]) | |
711 | { | |
712 | (void) cmdtp; (void) flag; (void) argc; (void) argv; | |
713 | ||
714 | uint8_t tmp = env_valid; | |
715 | env_valid = 0; | |
716 | ||
717 | /* Reset the whole environment */ | |
718 | printf_P(PSTR("## Resetting to default environment\n")); | |
719 | envlist_import(ENVLIST_DELETE); | |
720 | ||
721 | env_valid = tmp; | |
722 | ||
723 | return CMD_RET_SUCCESS; | |
724 | } | |
725 | ||
726 | ||
727 | command_ret_t do_env_save(cmd_tbl_t *cmdtp, int flag, int argc, char * const argv[]) | |
728 | { | |
729 | (void) cmdtp; (void) flag; (void) argc; (void) argv; | |
730 | ||
731 | printf_P(PSTR("Saving Environment ...\n")); | |
732 | return saveenv() ? CMD_RET_FAILURE : CMD_RET_SUCCESS; | |
733 | } | |
734 | ||
735 | ||
736 | #if defined(CONFIG_AUTO_COMPLETE) | |
737 | int env_complete(char *var, int maxv, char *cmdv[], int bufsz, char *buf) | |
738 | { | |
739 | ENTRY *match; | |
740 | int found, idx; | |
741 | ||
742 | idx = 0; | |
743 | found = 0; | |
744 | cmdv[0] = NULL; | |
745 | ||
746 | while ((idx = hmatch_r(var, idx, &match, &env_htab))) { | |
747 | int vallen = strlen(match->key) + 1; | |
748 | ||
749 | if (found >= maxv - 2 || bufsz < vallen) | |
750 | break; | |
751 | ||
752 | cmdv[found++] = buf; | |
753 | memcpy(buf, match->key, vallen); | |
754 | buf += vallen; | |
755 | bufsz -= vallen; | |
756 | } | |
757 | ||
758 | qsort(cmdv, found, sizeof(cmdv[0]), strcmp_compar); | |
759 | ||
760 | if (idx) | |
761 | cmdv[found++] = "..."; | |
762 | ||
763 | cmdv[found] = NULL; | |
764 | return found; | |
765 | } | |
766 | #endif |