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