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