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