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