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 *appname;
  23 static enum {
  24         CLI_FLAG_MERGE =    (1 << 0),
  25         CLI_FLAG_QUIET =    (1 << 1),
  26         CLI_FLAG_NOCOMMIT = (1 << 2),
  27         CLI_FLAG_BATCH =    (1 << 3),
  28 } flags;
  29
  30 static FILE *input;
  31
  32 static struct uci_context *ctx;
  33 enum {
  34         /* section cmds */
  35         CMD_GET,
  36         CMD_SET,
  37         CMD_DEL,
  38         CMD_RENAME,
  39         CMD_REVERT,
  40         /* package cmds */
  41         CMD_SHOW,
  42         CMD_CHANGES,
  43         CMD_EXPORT,
  44         CMD_COMMIT,
  45         /* other cmds */
  46         CMD_ADD,
  47         CMD_IMPORT,
  48         CMD_HELP,
  49 };
  50
  51 static int uci_cmd(int argc, char **argv);
  52
  53 static void uci_usage(void)
  54 {
  55         fprintf(stderr,
  56                 "Usage: %s [<options>] <command> [<arguments>]\n\n"
  57                 "Commands:\n"
  58                 "\tbatch\n"
  59                 "\texport     [<config>]\n"
  60                 "\timport     [<config>]\n"
  61                 "\tchanges    [<config>]\n"
  62                 "\tcommit     [<config>]\n"
  63                 "\tadd        <config> <section-type>\n"
  64                 "\tshow       [<config>[.<section>[.<option>]]]\n"
  65                 "\tget        <config>.<section>[.<option>]\n"
  66                 "\tset        <config>.<section>[.<option>]=<value>\n"
  67                 "\trename     <config>.<section>[.<option>]=<name>\n"
  68                 "\trevert     <config>[.<section>[.<option>]]\n"
  69                 "\n"
  70                 "Options:\n"
  71                 "\t-c <path>  set the search path for config files (default: /etc/config)\n"
  72                 "\t-f <file>  use <file> as input instead of stdin\n"
  73                 "\t-m         when importing, merge data into an existing package\n"
  74                 "\t-n         name unnamed sections on export (default)\n"
  75                 "\t-N         don't name unnamed sections\n"
  76                 "\t-p <path>  add a search path for config change files\n"
  77                 "\t-P <path>  add a search path for config change files and use as default\n"
  78                 "\t-q         quiet mode (don't print error messages)\n"
  79                 "\t-s         force strict mode (stop on parser errors, default)\n"
  80                 "\t-S         disable strict mode\n"
  81                 "\n",
  82                 appname
  83         );
  84 }
  85
  86 static void cli_perror(void)
  87 {
  88         if (flags & CLI_FLAG_QUIET)
  89                 return;
  90
  91         uci_perror(ctx, appname);
  92 }
  93
  94 static void uci_show_option(struct uci_option *o)
  95 {
  96       printf("%s.%s.%s=%s\n",
  97                       o->section->package->e.name,
  98                       o->section->e.name,
  99                       o->e.name,
 100                         o->value);
 101 }
 102
 103 static void uci_show_section(struct uci_section *p)
 104 {
 105         struct uci_element *e;
 106         const char *cname, *sname;
 107
 108         cname = p->package->e.name;
 109         sname = p->e.name;
 110         printf("%s.%s=%s\n", cname, sname, p->type);
 111         uci_foreach_element(&p->options, e) {
 112                 uci_show_option(uci_to_option(e));
 113         }
 114 }
 115
 116 static void uci_show_package(struct uci_package *p)
 117 {
 118         struct uci_element *e;
 119
 120         uci_foreach_element( &p->sections, e) {
 121                 uci_show_section(uci_to_section(e));
 122         }
 123 }
 124
 125 static void uci_show_changes(struct uci_package *p)
 126 {
 127         struct uci_element *e;
 128
 129         uci_foreach_element(&p->saved_history, e) {
 130                 struct uci_history *h = uci_to_history(e);
 131
 132                 if (h->cmd == UCI_CMD_REMOVE)
 133                         printf("-");
 134                 printf("%s.%s", p->e.name, h->section);
 135                 if (e->name)
 136                         printf(".%s", e->name);
 137                 if (h->cmd != UCI_CMD_REMOVE)
 138                         printf("=%s", h->value);
 139                 printf("\n");
 140         }
 141 }
 142
 143 static int package_cmd(int cmd, char *tuple)
 144 {
 145         struct uci_package *p;
 146         struct uci_section *s;
 147         struct uci_element *e = NULL;
 148
 149         if (uci_lookup_ext(ctx, &e, tuple) != UCI_OK) {
 150                 cli_perror();
 151                 return 1;
 152         }
 153         switch(e->type) {
 154         case UCI_TYPE_PACKAGE:
 155                 p = uci_to_package(e);
 156                 break;
 157         case UCI_TYPE_SECTION:
 158                 s = uci_to_section(e);
 159                 p = s->package;
 160                 break;
 161         case UCI_TYPE_OPTION:
 162                 s = uci_to_option(e)->section;
 163                 p = s->package;
 164                 break;
 165         default:
 166                 return 0;
 167         }
 168
 169         switch(cmd) {
 170         case CMD_CHANGES:
 171                 uci_show_changes(p);
 172                 break;
 173         case CMD_COMMIT:
 174                 if (flags & CLI_FLAG_NOCOMMIT)
 175                         return 0;
 176                 if (uci_commit(ctx, &p, false) != UCI_OK)
 177                         cli_perror();
 178                 break;
 179         case CMD_EXPORT:
 180                 uci_export(ctx, stdout, p, true);
 181                 break;
 182         case CMD_SHOW:
 183                 switch(e->type) {
 184                         case UCI_TYPE_PACKAGE:
 185                                 uci_show_package(p);
 186                                 break;
 187                         case UCI_TYPE_SECTION:
 188                                 uci_show_section(uci_to_section(e));
 189                                 break;
 190                         case UCI_TYPE_OPTION:
 191                                 uci_show_option(uci_to_option(e));
 192                                 break;
 193                         default:
 194                                 /* should not happen */
 195                                 return 1;
 196                 }
 197                 break;
 198         }
 199
 200         uci_unload(ctx, p);
 201         return 0;
 202 }
 203
 204 static int uci_do_import(int argc, char **argv)
 205 {
 206         struct uci_package *package = NULL;
 207         char *name = NULL;
 208         int ret = UCI_OK;
 209         bool merge = false;
 210
 211         if (argc > 2)
 212                 return 255;
 213
 214         if (argc == 2)
 215                 name = argv[1];
 216         else if (flags & CLI_FLAG_MERGE)
 217                 /* need a package to merge */
 218                 return 255;
 219
 220         if (flags & CLI_FLAG_MERGE) {
 221                 if (uci_load(ctx, name, &package) != UCI_OK)
 222                         package = NULL;
 223                 else
 224                         merge = true;
 225         }
 226         ret = uci_import(ctx, input, name, &package, (name != NULL));
 227         if (ret == UCI_OK) {
 228                 if (merge) {
 229                         ret = uci_save(ctx, package);
 230                 } else {
 231                         struct uci_element *e;
 232                         /* loop through all config sections and overwrite existing data */
 233                         uci_foreach_element(&ctx->root, e) {
 234                                 struct uci_package *p = uci_to_package(e);
 235                                 ret = uci_commit(ctx, &p, true);
 236                         }
 237                 }
 238         }
 239
 240         if (ret != UCI_OK) {
 241                 cli_perror();
 242                 return 1;
 243         }
 244
 245         return 0;
 246 }
 247
 248 static int uci_do_package_cmd(int cmd, int argc, char **argv)
 249 {
 250         char **configs = NULL;
 251         char **p;
 252
 253         if (argc > 2)
 254                 return 255;
 255
 256         if (argc == 2)
 257                 return package_cmd(cmd, argv[1]);
 258
 259         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
 260                 cli_perror();
 261                 return 1;
 262         }
 263
 264         for (p = configs; *p; p++) {
 265                 package_cmd(cmd, *p);
 266         }
 267
 268         return 0;
 269 }
 270
 271 static int uci_do_add(int argc, char **argv)
 272 {
 273         struct uci_package *p = NULL;
 274         struct uci_section *s = NULL;
 275         int ret;
 276
 277         if (argc != 3)
 278                 return 255;
 279
 280         ret = uci_load(ctx, argv[1], &p);
 281         if (ret != UCI_OK)
 282                 goto done;
 283
 284         ret = uci_add_section(ctx, p, argv[2], &s);
 285         if (ret != UCI_OK)
 286                 goto done;
 287
 288         ret = uci_save(ctx, p);
 289
 290 done:
 291         if (ret != UCI_OK)
 292                 cli_perror();
 293         else if (s)
 294                 fprintf(stdout, "%s\n", s->e.name);
 295
 296         return ret;
 297 }
 298
 299 static int uci_do_section_cmd(int cmd, int argc, char **argv)
 300 {
 301         struct uci_package *p = NULL;
 302         struct uci_section *s = NULL;
 303         struct uci_element *e = NULL;
 304         char *section = NULL;
 305         char *option = NULL;
 306         char *value = NULL;
 307         int ret = UCI_OK;
 308
 309         if (argc != 2)
 310                 return 255;
 311
 312         value = strchr(argv[1], '=');
 313         if (value) {
 314                 *value = 0;
 315                 value++;
 316                 if (!uci_validate_text(value))
 317                         return 1;
 318         }
 319
 320         if (value && (cmd != CMD_SET) && (cmd != CMD_RENAME))
 321                 return 1;
 322
 323         if (uci_lookup_ext(ctx, &e, argv[1]) != UCI_OK) {
 324                 cli_perror();
 325                 return 1;
 326         }
 327
 328         switch(e->type) {
 329         case UCI_TYPE_SECTION:
 330                 s = uci_to_section(e);
 331                 break;
 332         case UCI_TYPE_OPTION:
 333                 option = e->name;
 334                 s = uci_to_option(e)->section;
 335                 break;
 336         default:
 337                 return 1;
 338         }
 339         section = s->e.name;
 340         p = s->package;
 341
 342         switch(cmd) {
 343         case CMD_GET:
 344                 switch(e->type) {
 345                 case UCI_TYPE_SECTION:
 346                         value = s->type;
 347                         break;
 348                 case UCI_TYPE_OPTION:
 349                         value = uci_to_option(e)->value;
 350                         break;
 351                 default:
 352                         break;
 353                 }
 354                 /* throw the value to stdout */
 355                 printf("%s\n", value);
 356                 break;
 357         case CMD_RENAME:
 358                 ret = uci_rename(ctx, p, section, option, value);
 359                 break;
 360         case CMD_REVERT:
 361                 ret = uci_revert(ctx, &p, section, option);
 362                 break;
 363         case CMD_SET:
 364                 ret = uci_set(ctx, p, section, option, value, NULL);
 365                 break;
 366         case CMD_DEL:
 367                 ret = uci_delete(ctx, p, section, option);
 368                 break;
 369         }
 370
 371         /* no save necessary for get */
 372         if ((cmd == CMD_GET) || (cmd == CMD_REVERT))
 373                 return 0;
 374
 375         /* save changes, but don't commit them yet */
 376         if (ret == UCI_OK)
 377                 ret = uci_save(ctx, p);
 378
 379         if (ret != UCI_OK) {
 380                 cli_perror();
 381                 return 1;
 382         }
 383
 384         return 0;
 385 }
 386
 387 static int uci_batch_cmd(void)
 388 {
 389         char *argv[MAX_ARGS];
 390         char *str = NULL;
 391         int ret = 0;
 392         int i, j;
 393
 394         for(i = 0; i <= MAX_ARGS; i++) {
 395                 if (i == MAX_ARGS) {
 396                         fprintf(stderr, "Too many arguments\n");
 397                         return 1;
 398                 }
 399                 argv[i] = NULL;
 400                 if ((ret = uci_parse_argument(ctx, input, &str, &argv[i])) != UCI_OK) {
 401                         cli_perror();
 402                         i = 0;
 403                         break;
 404                 }
 405                 if (!argv[i][0])
 406                         break;
 407                 argv[i] = strdup(argv[i]);
 408                 if (!argv[i]) {
 409                         perror("uci");
 410                         return 1;
 411                 }
 412         }
 413         argv[i] = NULL;
 414
 415         if (i > 0) {
 416                 if (!strcasecmp(argv[0], "exit"))
 417                         return 254;
 418                 ret = uci_cmd(i, argv);
 419         } else
 420                 return 0;
 421
 422         for (j = 0; j < i; j++) {
 423                 if (argv[j])
 424                         free(argv[j]);
 425         }
 426
 427         return ret;
 428 }
 429
 430 static int uci_batch(void)
 431 {
 432         int ret = 0;
 433
 434         while (!feof(input)) {
 435                 struct uci_element *e, *tmp;
 436
 437                 ret = uci_batch_cmd();
 438                 if (ret == 254)
 439                         return 0;
 440                 else if (ret == 255)
 441                         fprintf(stderr, "Unknown command\n");
 442
 443                 /* clean up */
 444                 uci_foreach_element_safe(&ctx->root, tmp, e) {
 445                         uci_unload(ctx, uci_to_package(e));
 446                 }
 447         }
 448         return 0;
 449 }
 450
 451 static int uci_cmd(int argc, char **argv)
 452 {
 453         int cmd = 0;
 454
 455         if (!strcasecmp(argv[0], "batch") && !(flags & CLI_FLAG_BATCH))
 456                 return uci_batch();
 457         else if (!strcasecmp(argv[0], "show"))
 458                 cmd = CMD_SHOW;
 459         else if (!strcasecmp(argv[0], "changes"))
 460                 cmd = CMD_CHANGES;
 461         else if (!strcasecmp(argv[0], "export"))
 462                 cmd = CMD_EXPORT;
 463         else if (!strcasecmp(argv[0], "commit"))
 464                 cmd = CMD_COMMIT;
 465         else if (!strcasecmp(argv[0], "get"))
 466                 cmd = CMD_GET;
 467         else if (!strcasecmp(argv[0], "set"))
 468                 cmd = CMD_SET;
 469         else if (!strcasecmp(argv[0], "ren") ||
 470                  !strcasecmp(argv[0], "rename"))
 471                 cmd = CMD_RENAME;
 472         else if (!strcasecmp(argv[0], "revert"))
 473                 cmd = CMD_REVERT;
 474         else if (!strcasecmp(argv[0], "del"))
 475                 cmd = CMD_DEL;
 476         else if (!strcasecmp(argv[0], "import"))
 477                 cmd = CMD_IMPORT;
 478         else if (!strcasecmp(argv[0], "help"))
 479                 cmd = CMD_HELP;
 480         else if (!strcasecmp(argv[0], "add"))
 481                 cmd = CMD_ADD;
 482         else
 483                 cmd = -1;
 484
 485         switch(cmd) {
 486                 case CMD_GET:
 487                 case CMD_SET:
 488                 case CMD_DEL:
 489                 case CMD_RENAME:
 490                 case CMD_REVERT:
 491                         return uci_do_section_cmd(cmd, argc, argv);
 492                 case CMD_SHOW:
 493                 case CMD_EXPORT:
 494                 case CMD_COMMIT:
 495                 case CMD_CHANGES:
 496                         return uci_do_package_cmd(cmd, argc, argv);
 497                 case CMD_IMPORT:
 498                         return uci_do_import(argc, argv);
 499                 case CMD_ADD:
 500                         return uci_do_add(argc, argv);
 501                 case CMD_HELP:
 502                         uci_usage();
 503                         return 0;
 504                 default:
 505                         return 255;
 506         }
 507 }
 508
 509 int main(int argc, char **argv)
 510 {
 511         int ret;
 512         int c;
 513
 514         appname = argv[0];
 515         input = stdin;
 516         ctx = uci_alloc_context();
 517         if (!ctx) {
 518                 fprintf(stderr, "Out of memory\n");
 519                 return 1;
 520         }
 521
 522         while((c = getopt(argc, argv, "c:f:mnNp:P:sSq")) != -1) {
 523                 switch(c) {
 524                         case 'c':
 525                                 uci_set_confdir(ctx, optarg);
 526                                 break;
 527                         case 'f':
 528                                 input = fopen(optarg, "r");
 529                                 if (!input) {
 530                                         perror("uci");
 531                                         return 1;
 532                                 }
 533                                 break;
 534                         case 'm':
 535                                 flags |= CLI_FLAG_MERGE;
 536                                 break;
 537                         case 's':
 538                                 ctx->flags |= UCI_FLAG_STRICT;
 539                                 break;
 540                         case 'S':
 541                                 ctx->flags &= ~UCI_FLAG_STRICT;
 542                                 ctx->flags |= UCI_FLAG_PERROR;
 543                                 break;
 544                         case 'n':
 545                                 ctx->flags |= UCI_FLAG_EXPORT_NAME;
 546                                 break;
 547                         case 'N':
 548                                 ctx->flags &= ~UCI_FLAG_EXPORT_NAME;
 549                                 break;
 550                         case 'p':
 551                                 uci_add_history_path(ctx, optarg);
 552                                 break;
 553                         case 'P':
 554                                 uci_add_history_path(ctx, ctx->savedir);
 555                                 uci_set_savedir(ctx, optarg);
 556                                 flags |= CLI_FLAG_NOCOMMIT;
 557                                 break;
 558                         case 'q':
 559                                 flags |= CLI_FLAG_QUIET;
 560                                 break;
 561                         default:
 562                                 uci_usage();
 563                                 return 0;
 564                 }
 565         }
 566         if (optind > 1)
 567                 argv[optind - 1] = argv[0];
 568         argv += optind - 1;
 569         argc -= optind - 1;
 570
 571         if (argc < 2) {
 572                 uci_usage();
 573                 return 0;
 574         }
 575         ret = uci_cmd(argc - 1, argv + 1);
 576         if (input != stdin)
 577                 fclose(input);
 578         if (ret == 255) {
 579                 uci_usage();
 580                 return 0;
 581         }
 582
 583         uci_free_context(ctx);
 584
 585         return ret;
 586 }