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