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