cli.c

   1 /*
   2  * cli - Command Line Interface for the Unified Configuration Interface
   3  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2
   7  * as published by the Free Software Foundation
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <strings.h>
  15 #include <string.h>
  16 #include <stdlib.h>
  17 #include <stdarg.h>
  18 #include <errno.h>
  19 #include <unistd.h>
  20 #include "uci.h"
  21
  22 #define MAX_ARGS        4 /* max command line arguments for batch mode */
  23
  24 static const char *delimiter = " ";
  25 static const char *appname;
  26 static enum {
  27         CLI_FLAG_MERGE =    (1 << 0),
  28         CLI_FLAG_QUIET =    (1 << 1),
  29         CLI_FLAG_NOCOMMIT = (1 << 2),
  30         CLI_FLAG_BATCH =    (1 << 3),
  31         CLI_FLAG_SHOW_EXT = (1 << 4),
  32 } flags;
  33
  34 static FILE *input;
  35
  36 static struct uci_context *ctx;
  37 enum {
  38         /* section cmds */
  39         CMD_GET,
  40         CMD_SET,
  41         CMD_ADD_LIST,
  42         CMD_DEL_LIST,
  43         CMD_DEL,
  44         CMD_RENAME,
  45         CMD_REVERT,
  46         CMD_REORDER,
  47         /* package cmds */
  48         CMD_SHOW,
  49         CMD_CHANGES,
  50         CMD_EXPORT,
  51         CMD_COMMIT,
  52         /* other cmds */
  53         CMD_ADD,
  54         CMD_IMPORT,
  55         CMD_HELP,
  56 };
  57
  58 struct uci_type_list {
  59         unsigned int idx;
  60         const char *name;
  61         struct uci_type_list *next;
  62 };
  63
  64 static struct uci_type_list *type_list = NULL;
  65 static char *typestr = NULL;
  66 static const char *cur_section_ref = NULL;
  67
  68 static int uci_cmd(int argc, char **argv);
  69
  70 static void
  71 uci_reset_typelist(void)
  72 {
  73         struct uci_type_list *type;
  74         while (type_list != NULL) {
  75                         type = type_list;
  76                         type_list = type_list->next;
  77                         free(type);
  78         }
  79         if (typestr) {
  80                 free(typestr);
  81                 typestr = NULL;
  82         }
  83         cur_section_ref = NULL;
  84 }
  85
  86 static char *
  87 uci_lookup_section_ref(struct uci_section *s)
  88 {
  89         struct uci_type_list *ti = type_list;
  90         char *ret;
  91         int maxlen;
  92
  93         if (!(flags & CLI_FLAG_SHOW_EXT))
  94                 return s->e.name;
  95
  96         /* look up in section type list */
  97         while (ti) {
  98                 if (strcmp(ti->name, s->type) == 0)
  99                         break;
 100                 ti = ti->next;
 101         }
 102         if (!ti) {
 103                 ti = malloc(sizeof(struct uci_type_list));
 104                 if (!ti)
 105                         return NULL;
 106                 memset(ti, 0, sizeof(struct uci_type_list));
 107                 ti->next = type_list;
 108                 type_list = ti;
 109                 ti->name = s->type;
 110         }
 111
 112         if (s->anonymous) {
 113                 maxlen = strlen(s->type) + 1 + 2 + 10;
 114                 if (!typestr) {
 115                         typestr = malloc(maxlen);
 116                 } else {
 117                         typestr = realloc(typestr, maxlen);
 118                 }
 119
 120                 if (typestr)
 121                         sprintf(typestr, "@%s[%d]", ti->name, ti->idx);
 122
 123                 ret = typestr;
 124         } else {
 125                 ret = s->e.name;
 126         }
 127
 128         ti->idx++;
 129
 130         return ret;
 131 }
 132
 133 static void uci_usage(void)
 134 {
 135         fprintf(stderr,
 136                 "Usage: %s [<options>] <command> [<arguments>]\n\n"
 137                 "Commands:\n"
 138                 "\tbatch\n"
 139                 "\texport     [<config>]\n"
 140                 "\timport     [<config>]\n"
 141                 "\tchanges    [<config>]\n"
 142                 "\tcommit     [<config>]\n"
 143                 "\tadd        <config> <section-type>\n"
 144                 "\tadd_list   <config>.<section>.<option>=<string>\n"
 145                 "\tdel_list   <config>.<section>.<option>=<string>\n"
 146                 "\tshow       [<config>[.<section>[.<option>]]]\n"
 147                 "\tget        <config>.<section>[.<option>]\n"
 148                 "\tset        <config>.<section>[.<option>]=<value>\n"
 149                 "\tdelete     <config>[.<section>[[.<option>][=<id>]]]\n"
 150                 "\trename     <config>.<section>[.<option>]=<name>\n"
 151                 "\trevert     <config>[.<section>[.<option>]]\n"
 152                 "\treorder    <config>.<section>=<position>\n"
 153                 "\n"
 154                 "Options:\n"
 155                 "\t-c <path>  set the search path for config files (default: /etc/config)\n"
 156                 "\t-d <str>   set the delimiter for list values in uci show\n"
 157                 "\t-f <file>  use <file> as input instead of stdin\n"
 158                 "\t-m         when importing, merge data into an existing package\n"
 159                 "\t-n         name unnamed sections on export (default)\n"
 160                 "\t-N         don't name unnamed sections\n"
 161                 "\t-p <path>  add a search path for config change files\n"
 162                 "\t-P <path>  add a search path for config change files and use as default\n"
 163                 "\t-q         quiet mode (don't print error messages)\n"
 164                 "\t-s         force strict mode (stop on parser errors, default)\n"
 165                 "\t-S         disable strict mode\n"
 166                 "\t-X         do not use extended syntax on 'show'\n"
 167                 "\n",
 168                 appname
 169         );
 170 }
 171
 172 static void cli_perror(void)
 173 {
 174         if (flags & CLI_FLAG_QUIET)
 175                 return;
 176
 177         uci_perror(ctx, appname);
 178 }
 179
 180 static void cli_error(const char *fmt, ...)
 181 {
 182         va_list ap;
 183
 184         if (flags & CLI_FLAG_QUIET)
 185                 return;
 186
 187         va_start(ap, fmt);
 188         vfprintf(stderr, fmt, ap);
 189         va_end(ap);
 190 }
 191
 192 static void uci_print_value(FILE *f, const char *v)
 193 {
 194         fprintf(f, "'");
 195         while (*v) {
 196                 if (*v != '\'')
 197                         fputc(*v, f);
 198                 else
 199                         fprintf(f, "'\\''");
 200                 v++;
 201         }
 202         fprintf(f, "'");
 203 }
 204
 205 static void uci_show_value(struct uci_option *o, bool quote)
 206 {
 207         struct uci_element *e;
 208         bool sep = false;
 209         char *space;
 210
 211         switch(o->type) {
 212         case UCI_TYPE_STRING:
 213                 if (quote)
 214                         uci_print_value(stdout, o->v.string);
 215                 else
 216                         printf("%s", o->v.string);
 217                 printf("\n");
 218                 break;
 219         case UCI_TYPE_LIST:
 220                 uci_foreach_element(&o->v.list, e) {
 221                         printf("%s", (sep ? delimiter : ""));
 222                         space = strpbrk(e->name, " \t\r\n");
 223                         if (!space && !quote)
 224                                 printf("%s", e->name);
 225                         else
 226                                 uci_print_value(stdout, e->name);
 227                         sep = true;
 228                 }
 229                 printf("\n");
 230                 break;
 231         default:
 232                 printf("<unknown>\n");
 233                 break;
 234         }
 235 }
 236
 237 static void uci_show_option(struct uci_option *o, bool quote)
 238 {
 239         printf("%s.%s.%s=",
 240                 o->section->package->e.name,
 241                 (cur_section_ref ? cur_section_ref : o->section->e.name),
 242                 o->e.name);
 243         uci_show_value(o, quote);
 244 }
 245
 246 static void uci_show_section(struct uci_section *s)
 247 {
 248         struct uci_element *e;
 249         const char *cname;
 250         const char *sname;
 251
 252         cname = s->package->e.name;
 253         sname = (cur_section_ref ? cur_section_ref : s->e.name);
 254         printf("%s.%s=%s\n", cname, sname, s->type);
 255         uci_foreach_element(&s->options, e) {
 256                 uci_show_option(uci_to_option(e), true);
 257         }
 258 }
 259
 260 static void uci_show_package(struct uci_package *p)
 261 {
 262         struct uci_element *e;
 263
 264         uci_reset_typelist();
 265         uci_foreach_element( &p->sections, e) {
 266                 struct uci_section *s = uci_to_section(e);
 267                 cur_section_ref = uci_lookup_section_ref(s);
 268                 uci_show_section(s);
 269         }
 270         uci_reset_typelist();
 271 }
 272
 273 static void uci_show_changes(struct uci_package *p)
 274 {
 275         struct uci_element *e;
 276
 277         uci_foreach_element(&p->saved_delta, e) {
 278                 struct uci_delta *h = uci_to_delta(e);
 279                 char *prefix = "";
 280                 char *op = "=";
 281
 282                 switch(h->cmd) {
 283                 case UCI_CMD_REMOVE:
 284                         prefix = "-";
 285                         break;
 286                 case UCI_CMD_LIST_ADD:
 287                         op = "+=";
 288                         break;
 289                 case UCI_CMD_LIST_DEL:
 290                         op = "-=";
 291                         break;
 292                 default:
 293                         break;
 294                 }
 295                 printf("%s%s.%s", prefix, p->e.name, h->section);
 296                 if (e->name)
 297                         printf(".%s", e->name);
 298                 if (h->cmd != UCI_CMD_REMOVE) {
 299                         printf("%s", op);
 300                         uci_print_value(stdout, h->value);
 301                 }
 302                 printf("\n");
 303         }
 304 }
 305
 306 static int package_cmd(int cmd, char *tuple)
 307 {
 308         struct uci_element *e = NULL;
 309         struct uci_ptr ptr;
 310         int ret = 1;
 311
 312         if (uci_lookup_ptr(ctx, &ptr, tuple, true) != UCI_OK) {
 313                 cli_perror();
 314                 return 1;
 315         }
 316
 317         e = ptr.last;
 318         switch(cmd) {
 319         case CMD_CHANGES:
 320                 uci_show_changes(ptr.p);
 321                 break;
 322         case CMD_COMMIT:
 323                 if (flags & CLI_FLAG_NOCOMMIT) {
 324                         ret = 0;
 325                         goto out;
 326                 }
 327                 if (uci_commit(ctx, &ptr.p, false) != UCI_OK) {
 328                         cli_perror();
 329                         goto out;
 330                 }
 331                 break;
 332         case CMD_EXPORT:
 333                 if (uci_export(ctx, stdout, ptr.p, true) != UCI_OK) {
 334                         goto out;
 335                 }
 336                 break;
 337         case CMD_SHOW:
 338                 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
 339                         ctx->err = UCI_ERR_NOTFOUND;
 340                         cli_perror();
 341                         goto out;
 342                 }
 343                 switch(e->type) {
 344                         case UCI_TYPE_PACKAGE:
 345                                 uci_show_package(ptr.p);
 346                                 break;
 347                         case UCI_TYPE_SECTION:
 348                                 uci_show_section(ptr.s);
 349                                 break;
 350                         case UCI_TYPE_OPTION:
 351                                 uci_show_option(ptr.o, true);
 352                                 break;
 353                         default:
 354                                 /* should not happen */
 355                                 goto out;
 356                 }
 357                 break;
 358         }
 359
 360         ret = 0;
 361
 362 out:
 363         if (ptr.p)
 364                 uci_unload(ctx, ptr.p);
 365         return ret;
 366 }
 367
 368 static int uci_do_import(int argc, char **argv)
 369 {
 370         struct uci_package *package = NULL;
 371         char *name = NULL;
 372         int ret = UCI_OK;
 373         bool merge = false;
 374
 375         if (argc > 2)
 376                 return 255;
 377
 378         if (argc == 2)
 379                 name = argv[1];
 380         else if (flags & CLI_FLAG_MERGE)
 381                 /* need a package to merge */
 382                 return 255;
 383
 384         if (flags & CLI_FLAG_MERGE) {
 385                 if (uci_load(ctx, name, &package) != UCI_OK)
 386                         package = NULL;
 387                 else
 388                         merge = true;
 389         }
 390         ret = uci_import(ctx, input, name, &package, (name != NULL));
 391         if (ret == UCI_OK) {
 392                 if (merge) {
 393                         ret = uci_save(ctx, package);
 394                 } else {
 395                         struct uci_element *e;
 396                         /* loop through all config sections and overwrite existing data */
 397                         uci_foreach_element(&ctx->root, e) {
 398                                 struct uci_package *p = uci_to_package(e);
 399                                 ret = uci_commit(ctx, &p, true);
 400                         }
 401                 }
 402         }
 403
 404         if (ret != UCI_OK) {
 405                 cli_perror();
 406                 return 1;
 407         }
 408
 409         return 0;
 410 }
 411
 412 static int uci_do_package_cmd(int cmd, int argc, char **argv)
 413 {
 414         char **configs = NULL;
 415         char **p;
 416         int ret = 1;
 417
 418         if (argc > 2)
 419                 return 255;
 420
 421         if (argc == 2)
 422                 return package_cmd(cmd, argv[1]);
 423
 424         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
 425                 cli_perror();
 426                 goto out;
 427         }
 428
 429         for (p = configs; *p; p++) {
 430                 package_cmd(cmd, *p);
 431         }
 432
 433         ret = 0;
 434 out:
 435         free(configs);
 436         return ret;
 437 }
 438
 439 static int uci_do_add(int argc, char **argv)
 440 {
 441         struct uci_package *p = NULL;
 442         struct uci_section *s = NULL;
 443         int ret;
 444
 445         if (argc != 3)
 446                 return 255;
 447
 448         ret = uci_load(ctx, argv[1], &p);
 449         if (ret != UCI_OK)
 450                 goto done;
 451
 452         ret = uci_add_section(ctx, p, argv[2], &s);
 453         if (ret != UCI_OK)
 454                 goto done;
 455
 456         ret = uci_save(ctx, p);
 457
 458 done:
 459         if (ret != UCI_OK)
 460                 cli_perror();
 461         else if (s)
 462                 fprintf(stdout, "%s\n", s->e.name);
 463
 464         return ret;
 465 }
 466
 467 static int uci_do_section_cmd(int cmd, int argc, char **argv)
 468 {
 469         struct uci_element *e;
 470         struct uci_ptr ptr;
 471         int ret = UCI_OK;
 472         int dummy;
 473
 474         if (argc != 2)
 475                 return 255;
 476
 477         if (uci_lookup_ptr(ctx, &ptr, argv[1], true) != UCI_OK) {
 478                 cli_perror();
 479                 return 1;
 480         }
 481
 482         if (ptr.value && (cmd != CMD_SET) && (cmd != CMD_DEL) &&
 483             (cmd != CMD_ADD_LIST) && (cmd != CMD_DEL_LIST) &&
 484             (cmd != CMD_RENAME) && (cmd != CMD_REORDER))
 485                 return 1;
 486
 487         e = ptr.last;
 488         switch(cmd) {
 489         case CMD_GET:
 490                 if (!(ptr.flags & UCI_LOOKUP_COMPLETE)) {
 491                         ctx->err = UCI_ERR_NOTFOUND;
 492                         cli_perror();
 493                         return 1;
 494                 }
 495                 switch(e->type) {
 496                 case UCI_TYPE_SECTION:
 497                         printf("%s\n", ptr.s->type);
 498                         break;
 499                 case UCI_TYPE_OPTION:
 500                         uci_show_value(ptr.o, false);
 501                         break;
 502                 default:
 503                         break;
 504                 }
 505                 /* throw the value to stdout */
 506                 break;
 507         case CMD_RENAME:
 508                 ret = uci_rename(ctx, &ptr);
 509                 break;
 510         case CMD_REVERT:
 511                 ret = uci_revert(ctx, &ptr);
 512                 break;
 513         case CMD_SET:
 514                 ret = uci_set(ctx, &ptr);
 515                 break;
 516         case CMD_ADD_LIST:
 517                 ret = uci_add_list(ctx, &ptr);
 518                 break;
 519         case CMD_DEL_LIST:
 520                 ret = uci_del_list(ctx, &ptr);
 521                 break;
 522         case CMD_REORDER:
 523                 if (!ptr.s || !ptr.value) {
 524                         ctx->err = UCI_ERR_NOTFOUND;
 525                         cli_perror();
 526                         return 1;
 527                 }
 528                 ret = uci_reorder_section(ctx, ptr.s, strtoul(ptr.value, NULL, 10));
 529                 break;
 530         case CMD_DEL:
 531                 if (ptr.value && !sscanf(ptr.value, "%d", &dummy))
 532                         return 1;
 533                 ret = uci_delete(ctx, &ptr);
 534                 break;
 535         }
 536
 537         /* no save necessary for get */
 538         if ((cmd == CMD_GET) || (cmd == CMD_REVERT))
 539                 return 0;
 540
 541         /* save changes, but don't commit them yet */
 542         if (ret == UCI_OK)
 543                 ret = uci_save(ctx, ptr.p);
 544
 545         if (ret != UCI_OK) {
 546                 cli_perror();
 547                 return 1;
 548         }
 549
 550         return 0;
 551 }
 552
 553 static int uci_batch_cmd(void)
 554 {
 555         char *argv[MAX_ARGS + 2];
 556         char *str = NULL;
 557         int ret = 0;
 558         int i, j;
 559
 560         for(i = 0; i <= MAX_ARGS; i++) {
 561                 if (i == MAX_ARGS) {
 562                         cli_error("Too many arguments\n");
 563                         return 1;
 564                 }
 565                 argv[i] = NULL;
 566                 if ((ret = uci_parse_argument(ctx, input, &str, &argv[i])) != UCI_OK) {
 567                         cli_perror();
 568                         i = 0;
 569                         break;
 570                 }
 571                 if (!argv[i][0])
 572                         break;
 573                 argv[i] = strdup(argv[i]);
 574                 if (!argv[i]) {
 575                         cli_error("uci: %s", strerror(errno));
 576                         return 1;
 577                 }
 578         }
 579         argv[i] = NULL;
 580
 581         if (i > 0) {
 582                 if (!strcasecmp(argv[0], "exit"))
 583                         return 254;
 584                 ret = uci_cmd(i, argv);
 585         } else
 586                 return 0;
 587
 588         for (j = 0; j < i; j++) {
 589                 free(argv[j]);
 590         }
 591
 592         return ret;
 593 }
 594
 595 static int uci_batch(void)
 596 {
 597         int ret = 0;
 598
 599         flags |= CLI_FLAG_BATCH;
 600         while (!feof(input)) {
 601                 struct uci_element *e, *tmp;
 602
 603                 ret = uci_batch_cmd();
 604                 if (ret == 254)
 605                         return 0;
 606                 else if (ret == 255)
 607                         cli_error("Unknown command\n");
 608
 609                 /* clean up */
 610                 uci_foreach_element_safe(&ctx->root, tmp, e) {
 611                         uci_unload(ctx, uci_to_package(e));
 612                 }
 613         }
 614         flags &= ~CLI_FLAG_BATCH;
 615
 616         return 0;
 617 }
 618
 619 static int uci_cmd(int argc, char **argv)
 620 {
 621         int cmd = 0;
 622
 623         if (!strcasecmp(argv[0], "batch") && !(flags & CLI_FLAG_BATCH))
 624                 return uci_batch();
 625         else if (!strcasecmp(argv[0], "show"))
 626                 cmd = CMD_SHOW;
 627         else if (!strcasecmp(argv[0], "changes"))
 628                 cmd = CMD_CHANGES;
 629         else if (!strcasecmp(argv[0], "export"))
 630                 cmd = CMD_EXPORT;
 631         else if (!strcasecmp(argv[0], "commit"))
 632                 cmd = CMD_COMMIT;
 633         else if (!strcasecmp(argv[0], "get"))
 634                 cmd = CMD_GET;
 635         else if (!strcasecmp(argv[0], "set"))
 636                 cmd = CMD_SET;
 637         else if (!strcasecmp(argv[0], "ren") ||
 638                  !strcasecmp(argv[0], "rename"))
 639                 cmd = CMD_RENAME;
 640         else if (!strcasecmp(argv[0], "revert"))
 641                 cmd = CMD_REVERT;
 642         else if (!strcasecmp(argv[0], "reorder"))
 643                 cmd = CMD_REORDER;
 644         else if (!strcasecmp(argv[0], "del") ||
 645                  !strcasecmp(argv[0], "delete"))
 646                 cmd = CMD_DEL;
 647         else if (!strcasecmp(argv[0], "import"))
 648                 cmd = CMD_IMPORT;
 649         else if (!strcasecmp(argv[0], "help"))
 650                 cmd = CMD_HELP;
 651         else if (!strcasecmp(argv[0], "add"))
 652                 cmd = CMD_ADD;
 653         else if (!strcasecmp(argv[0], "add_list"))
 654                 cmd = CMD_ADD_LIST;
 655         else if (!strcasecmp(argv[0], "del_list"))
 656                 cmd = CMD_DEL_LIST;
 657         else
 658                 cmd = -1;
 659
 660         switch(cmd) {
 661                 case CMD_ADD_LIST:
 662                 case CMD_DEL_LIST:
 663                 case CMD_GET:
 664                 case CMD_SET:
 665                 case CMD_DEL:
 666                 case CMD_RENAME:
 667                 case CMD_REVERT:
 668                 case CMD_REORDER:
 669                         return uci_do_section_cmd(cmd, argc, argv);
 670                 case CMD_SHOW:
 671                 case CMD_EXPORT:
 672                 case CMD_COMMIT:
 673                 case CMD_CHANGES:
 674                         return uci_do_package_cmd(cmd, argc, argv);
 675                 case CMD_IMPORT:
 676                         return uci_do_import(argc, argv);
 677                 case CMD_ADD:
 678                         return uci_do_add(argc, argv);
 679                 case CMD_HELP:
 680                         uci_usage();
 681                         return 0;
 682                 default:
 683                         return 255;
 684         }
 685 }
 686
 687 int main(int argc, char **argv)
 688 {
 689         int ret;
 690         int c;
 691
 692         flags = CLI_FLAG_SHOW_EXT;
 693         appname = argv[0];
 694         input = stdin;
 695         ctx = uci_alloc_context();
 696         if (!ctx) {
 697                 cli_error("Out of memory\n");
 698                 return 1;
 699         }
 700
 701         while((c = getopt(argc, argv, "c:d:f:LmnNp:P:sSqX")) != -1) {
 702                 switch(c) {
 703                         case 'c':
 704                                 uci_set_confdir(ctx, optarg);
 705                                 break;
 706                         case 'd':
 707                                 delimiter = optarg;
 708                                 break;
 709                         case 'f':
 710                                 if (input != stdin) {
 711                                         fclose(input);
 712                                         cli_error("Too many input files.\n");
 713                                         return 1;
 714                                 }
 715
 716                                 input = fopen(optarg, "r");
 717                                 if (!input) {
 718                                         cli_error("uci: %s", strerror(errno));
 719                                         return 1;
 720                                 }
 721                                 break;
 722                         case 'm':
 723                                 flags |= CLI_FLAG_MERGE;
 724                                 break;
 725                         case 's':
 726                                 ctx->flags |= UCI_FLAG_STRICT;
 727                                 break;
 728                         case 'S':
 729                                 ctx->flags &= ~UCI_FLAG_STRICT;
 730                                 ctx->flags |= UCI_FLAG_PERROR;
 731                                 break;
 732                         case 'n':
 733                                 ctx->flags |= UCI_FLAG_EXPORT_NAME;
 734                                 break;
 735                         case 'N':
 736                                 ctx->flags &= ~UCI_FLAG_EXPORT_NAME;
 737                                 break;
 738                         case 'p':
 739                                 uci_add_delta_path(ctx, optarg);
 740                                 break;
 741                         case 'P':
 742                                 uci_add_delta_path(ctx, ctx->savedir);
 743                                 uci_set_savedir(ctx, optarg);
 744                                 flags |= CLI_FLAG_NOCOMMIT;
 745                                 break;
 746                         case 'q':
 747                                 flags |= CLI_FLAG_QUIET;
 748                                 break;
 749                         case 'X':
 750                                 flags &= ~CLI_FLAG_SHOW_EXT;
 751                                 break;
 752                         default:
 753                                 uci_usage();
 754                                 return 0;
 755                 }
 756         }
 757         if (optind > 1)
 758                 argv[optind - 1] = argv[0];
 759         argv += optind - 1;
 760         argc -= optind - 1;
 761
 762         if (argc < 2) {
 763                 uci_usage();
 764                 return 0;
 765         }
 766
 767         ret = uci_cmd(argc - 1, argv + 1);
 768         if (input != stdin)
 769                 fclose(input);
 770
 771         if (ret == 255)
 772                 uci_usage();
 773
 774         uci_free_context(ctx);
 775
 776         return ret;
 777 }