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_section(struct uci_section *p)
  95 {
  96         struct uci_element *e;
  97         const char *cname, *sname;
  98
  99         cname = p->package->e.name;
 100         sname = p->e.name;
 101         printf("%s.%s=%s\n", cname, sname, p->type);
 102         uci_foreach_element(&p->options, e) {
 103                 printf("%s.%s.%s=%s\n", cname, sname, e->name, uci_to_option(e)->value);
 104         }
 105 }
 106
 107 static void uci_show_package(struct uci_package *p)
 108 {
 109         struct uci_element *e;
 110
 111         uci_foreach_element( &p->sections, e) {
 112                 uci_show_section(uci_to_section(e));
 113         }
 114 }
 115
 116 static void uci_show_changes(struct uci_package *p)
 117 {
 118         struct uci_element *e;
 119
 120         uci_foreach_element(&p->saved_history, e) {
 121                 struct uci_history *h = uci_to_history(e);
 122
 123                 if (h->cmd == UCI_CMD_REMOVE)
 124                         printf("-");
 125                 printf("%s.%s", p->e.name, h->section);
 126                 if (e->name)
 127                         printf(".%s", e->name);
 128                 if (h->cmd != UCI_CMD_REMOVE)
 129                         printf("=%s", h->value);
 130                 printf("\n");
 131         }
 132 }
 133
 134 static int package_cmd(int cmd, char *package)
 135 {
 136         struct uci_package *p = NULL;
 137         int ret;
 138
 139         ret = uci_load(ctx, package, &p);
 140
 141         if (ret != UCI_OK) {
 142                 cli_perror();
 143                 return 1;
 144         }
 145         if (!p)
 146                 return 0;
 147         switch(cmd) {
 148         case CMD_CHANGES:
 149                 uci_show_changes(p);
 150                 break;
 151         case CMD_COMMIT:
 152                 if (flags & CLI_FLAG_NOCOMMIT)
 153                         return 0;
 154                 if (uci_commit(ctx, &p, false) != UCI_OK)
 155                         cli_perror();
 156                 break;
 157         case CMD_EXPORT:
 158                 uci_export(ctx, stdout, p, true);
 159                 break;
 160         case CMD_SHOW:
 161                 uci_show_package(p);
 162                 break;
 163         }
 164
 165         uci_unload(ctx, p);
 166         return 0;
 167 }
 168
 169 static int uci_do_import(int argc, char **argv)
 170 {
 171         struct uci_package *package = NULL;
 172         char *name = NULL;
 173         int ret = UCI_OK;
 174         bool merge = false;
 175
 176         if (argc > 2)
 177                 return 255;
 178
 179         if (argc == 2)
 180                 name = argv[1];
 181         else if (flags & CLI_FLAG_MERGE)
 182                 /* need a package to merge */
 183                 return 255;
 184
 185         if (flags & CLI_FLAG_MERGE) {
 186                 if (uci_load(ctx, name, &package) != UCI_OK)
 187                         package = NULL;
 188                 else
 189                         merge = true;
 190         }
 191         ret = uci_import(ctx, input, name, &package, (name != NULL));
 192         if (ret == UCI_OK) {
 193                 if (merge) {
 194                         ret = uci_save(ctx, package);
 195                 } else {
 196                         struct uci_element *e;
 197                         /* loop through all config sections and overwrite existing data */
 198                         uci_foreach_element(&ctx->root, e) {
 199                                 struct uci_package *p = uci_to_package(e);
 200                                 ret = uci_commit(ctx, &p, true);
 201                         }
 202                 }
 203         }
 204
 205         if (ret != UCI_OK) {
 206                 cli_perror();
 207                 return 1;
 208         }
 209
 210         return 0;
 211 }
 212
 213 static int uci_do_package_cmd(int cmd, int argc, char **argv)
 214 {
 215         char **configs = NULL;
 216         char **p;
 217
 218         if (argc > 2)
 219                 return 255;
 220
 221         if (argc == 2)
 222                 return package_cmd(cmd, argv[1]);
 223
 224         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
 225                 cli_perror();
 226                 return 1;
 227         }
 228
 229         for (p = configs; *p; p++) {
 230                 package_cmd(cmd, *p);
 231         }
 232
 233         return 0;
 234 }
 235
 236 static int uci_do_add(int argc, char **argv)
 237 {
 238         struct uci_package *p = NULL;
 239         struct uci_section *s = NULL;
 240         int ret;
 241
 242         if (argc != 3)
 243                 return 255;
 244
 245         ret = uci_load(ctx, argv[1], &p);
 246         if (ret != UCI_OK)
 247                 goto done;
 248
 249         ret = uci_add_section(ctx, p, argv[2], &s);
 250         if (ret != UCI_OK)
 251                 goto done;
 252
 253         ret = uci_save(ctx, p);
 254
 255 done:
 256         if (ret != UCI_OK)
 257                 cli_perror();
 258         else if (s)
 259                 fprintf(stdout, "%s\n", s->e.name);
 260
 261         return ret;
 262 }
 263
 264 static int uci_do_section_cmd(int cmd, int argc, char **argv)
 265 {
 266         struct uci_package *p = NULL;
 267         struct uci_element *e = NULL;
 268         char *package = NULL;
 269         char *section = NULL;
 270         char *option = NULL;
 271         char *value = NULL;
 272         char **ptr = NULL;
 273         int ret = UCI_OK;
 274
 275         if (argc != 2)
 276                 return 255;
 277
 278         switch(cmd) {
 279         case CMD_SET:
 280         case CMD_RENAME:
 281                 ptr = &value;
 282                 break;
 283         default:
 284                 break;
 285         }
 286         if (uci_parse_tuple(ctx, argv[1], &package, &section, &option, ptr) != UCI_OK)
 287                 return 1;
 288         if (section && !section[0])
 289                 return 1;
 290
 291         if (uci_load(ctx, package, &p) != UCI_OK) {
 292                 cli_perror();
 293                 return 1;
 294         }
 295         if (!p)
 296                 return 0;
 297
 298         switch(cmd) {
 299         case CMD_GET:
 300                 if (uci_lookup(ctx, &e, p, section, option) != UCI_OK)
 301                         return 1;
 302
 303                 switch(e->type) {
 304                 case UCI_TYPE_SECTION:
 305                         value = uci_to_section(e)->type;
 306                         break;
 307                 case UCI_TYPE_OPTION:
 308                         value = uci_to_option(e)->value;
 309                         break;
 310                 default:
 311                         /* should not happen */
 312                         return 1;
 313                 }
 314                 /* throw the value to stdout */
 315                 printf("%s\n", value);
 316                 break;
 317         case CMD_RENAME:
 318                 ret = uci_rename(ctx, p, section, option, value);
 319                 break;
 320         case CMD_REVERT:
 321                 ret = uci_revert(ctx, &p, section, option);
 322                 break;
 323         case CMD_SET:
 324                 ret = uci_set(ctx, p, section, option, value, NULL);
 325                 break;
 326         case CMD_DEL:
 327                 ret = uci_delete(ctx, p, section, option);
 328                 break;
 329         }
 330
 331         /* no save necessary for get */
 332         if ((cmd == CMD_GET) || (cmd == CMD_REVERT))
 333                 return 0;
 334
 335         /* save changes, but don't commit them yet */
 336         if (ret == UCI_OK)
 337                 ret = uci_save(ctx, p);
 338
 339         if (ret != UCI_OK) {
 340                 cli_perror();
 341                 return 1;
 342         }
 343
 344         return 0;
 345 }
 346
 347 static int uci_batch_cmd(void)
 348 {
 349         char *argv[MAX_ARGS];
 350         char *str = NULL;
 351         int ret = 0;
 352         int i, j;
 353
 354         for(i = 0; i <= MAX_ARGS; i++) {
 355                 if (i == MAX_ARGS) {
 356                         fprintf(stderr, "Too many arguments\n");
 357                         return 1;
 358                 }
 359                 argv[i] = NULL;
 360                 if ((ret = uci_parse_argument(ctx, input, &str, &argv[i])) != UCI_OK) {
 361                         cli_perror();
 362                         i = 0;
 363                         break;
 364                 }
 365                 if (!argv[i][0])
 366                         break;
 367                 argv[i] = strdup(argv[i]);
 368                 if (!argv[i]) {
 369                         perror("uci");
 370                         return 1;
 371                 }
 372         }
 373         argv[i] = NULL;
 374
 375         if (i > 0) {
 376                 if (!strcasecmp(argv[0], "exit"))
 377                         return 254;
 378                 ret = uci_cmd(i, argv);
 379         } else
 380                 return 0;
 381
 382         for (j = 0; j < i; j++) {
 383                 if (argv[j])
 384                         free(argv[j]);
 385         }
 386
 387         return ret;
 388 }
 389
 390 static int uci_batch(void)
 391 {
 392         int ret = 0;
 393
 394         while (!feof(input)) {
 395                 struct uci_element *e, *tmp;
 396
 397                 ret = uci_batch_cmd();
 398                 if (ret == 254)
 399                         return 0;
 400                 else if (ret == 255)
 401                         fprintf(stderr, "Unknown command\n");
 402
 403                 /* clean up */
 404                 uci_foreach_element_safe(&ctx->root, tmp, e) {
 405                         uci_unload(ctx, uci_to_package(e));
 406                 }
 407         }
 408         return 0;
 409 }
 410
 411 static int uci_cmd(int argc, char **argv)
 412 {
 413         int cmd = 0;
 414
 415         if (!strcasecmp(argv[0], "batch") && !(flags & CLI_FLAG_BATCH))
 416                 return uci_batch();
 417         else if (!strcasecmp(argv[0], "show"))
 418                 cmd = CMD_SHOW;
 419         else if (!strcasecmp(argv[0], "changes"))
 420                 cmd = CMD_CHANGES;
 421         else if (!strcasecmp(argv[0], "export"))
 422                 cmd = CMD_EXPORT;
 423         else if (!strcasecmp(argv[0], "commit"))
 424                 cmd = CMD_COMMIT;
 425         else if (!strcasecmp(argv[0], "get"))
 426                 cmd = CMD_GET;
 427         else if (!strcasecmp(argv[0], "set"))
 428                 cmd = CMD_SET;
 429         else if (!strcasecmp(argv[0], "ren") ||
 430                  !strcasecmp(argv[0], "rename"))
 431                 cmd = CMD_RENAME;
 432         else if (!strcasecmp(argv[0], "revert"))
 433                 cmd = CMD_REVERT;
 434         else if (!strcasecmp(argv[0], "del"))
 435                 cmd = CMD_DEL;
 436         else if (!strcasecmp(argv[0], "import"))
 437                 cmd = CMD_IMPORT;
 438         else if (!strcasecmp(argv[0], "help"))
 439                 cmd = CMD_HELP;
 440         else if (!strcasecmp(argv[0], "add"))
 441                 cmd = CMD_ADD;
 442         else
 443                 cmd = -1;
 444
 445         switch(cmd) {
 446                 case CMD_GET:
 447                 case CMD_SET:
 448                 case CMD_DEL:
 449                 case CMD_RENAME:
 450                 case CMD_REVERT:
 451                         return uci_do_section_cmd(cmd, argc, argv);
 452                 case CMD_SHOW:
 453                 case CMD_EXPORT:
 454                 case CMD_COMMIT:
 455                 case CMD_CHANGES:
 456                         return uci_do_package_cmd(cmd, argc, argv);
 457                 case CMD_IMPORT:
 458                         return uci_do_import(argc, argv);
 459                 case CMD_ADD:
 460                         return uci_do_add(argc, argv);
 461                 case CMD_HELP:
 462                         uci_usage();
 463                         return 0;
 464                 default:
 465                         return 255;
 466         }
 467 }
 468
 469 int main(int argc, char **argv)
 470 {
 471         int ret;
 472         int c;
 473
 474         appname = argv[0];
 475         input = stdin;
 476         ctx = uci_alloc_context();
 477         if (!ctx) {
 478                 fprintf(stderr, "Out of memory\n");
 479                 return 1;
 480         }
 481
 482         while((c = getopt(argc, argv, "c:f:mnNp:P:sSq")) != -1) {
 483                 switch(c) {
 484                         case 'c':
 485                                 uci_set_confdir(ctx, optarg);
 486                                 break;
 487                         case 'f':
 488                                 input = fopen(optarg, "r");
 489                                 if (!input) {
 490                                         perror("uci");
 491                                         return 1;
 492                                 }
 493                                 break;
 494                         case 'm':
 495                                 flags |= CLI_FLAG_MERGE;
 496                                 break;
 497                         case 's':
 498                                 ctx->flags |= UCI_FLAG_STRICT;
 499                                 break;
 500                         case 'S':
 501                                 ctx->flags &= ~UCI_FLAG_STRICT;
 502                                 ctx->flags |= UCI_FLAG_PERROR;
 503                                 break;
 504                         case 'n':
 505                                 ctx->flags |= UCI_FLAG_EXPORT_NAME;
 506                                 break;
 507                         case 'N':
 508                                 ctx->flags &= ~UCI_FLAG_EXPORT_NAME;
 509                                 break;
 510                         case 'p':
 511                                 uci_add_history_path(ctx, optarg);
 512                                 break;
 513                         case 'P':
 514                                 uci_add_history_path(ctx, ctx->savedir);
 515                                 uci_set_savedir(ctx, optarg);
 516                                 flags |= CLI_FLAG_NOCOMMIT;
 517                                 break;
 518                         case 'q':
 519                                 flags |= CLI_FLAG_QUIET;
 520                                 break;
 521                         default:
 522                                 uci_usage();
 523                                 return 0;
 524                 }
 525         }
 526         if (optind > 1)
 527                 argv[optind - 1] = argv[0];
 528         argv += optind - 1;
 529         argc -= optind - 1;
 530
 531         if (argc < 2) {
 532                 uci_usage();
 533                 return 0;
 534         }
 535         ret = uci_cmd(argc - 1, argv + 1);
 536         if (input != stdin)
 537                 fclose(input);
 538         if (ret == 255) {
 539                 uci_usage();
 540                 return 0;
 541         }
 542
 543         uci_free_context(ctx);
 544
 545         return ret;
 546 }