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