cli.c

   1 /*
   2  * Copyright (C) 2008 Felix Fietkau <nbd@openwrt.org>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2
   6  * as published by the Free Software Foundation
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13 #include <strings.h>
  14 #include <stdlib.h>
  15 #include <unistd.h>
  16 #include "uci.h"
  17
  18 static const char *appname = "uci";
  19 static enum {
  20         CLI_FLAG_MERGE = (1 << 0),
  21         CLI_FLAG_QUIET = (1 << 1)
  22 } flags;
  23 static FILE *input;
  24
  25 static struct uci_context *ctx;
  26 enum {
  27         /* section cmds */
  28         CMD_GET,
  29         CMD_SET,
  30         CMD_DEL,
  31         CMD_RENAME,
  32         /* package cmds */
  33         CMD_SHOW,
  34         CMD_IMPORT,
  35         CMD_EXPORT,
  36         CMD_COMMIT,
  37 };
  38
  39 static void uci_usage(int argc, char **argv)
  40 {
  41         fprintf(stderr,
  42                 "Usage: %s [<options>] <command> [<arguments>]\n\n"
  43                 "Commands:\n"
  44                 "\texport     [<config>]\n"
  45                 "\timport     [<config>]\n"
  46                 "\tshow       [<config>[.<section>[.<option>]]]\n"
  47                 "\tget        <config>.<section>[.<option>]\n"
  48                 "\tset        <config>.<section>[.<option>]=<value>\n"
  49                 "\trename     <config>.<section>[.<option>]=<name>\n"
  50                 "\n"
  51                 "Options:\n"
  52                 "\t-f <file>  use <file> as input instead of stdin\n"
  53                 "\t-m         when importing, merge data into an existing package\n"
  54                 "\t-n         name unnamed sections on export (default)\n"
  55                 "\t-N         don't name unnamed sections\n"
  56                 "\t-q         quiet mode (don't print error messages)\n"
  57                 "\t-s         force strict mode (stop on parser errors, default)\n"
  58                 "\t-S         disable strict mode\n"
  59                 "\n",
  60                 argv[0]
  61         );
  62         exit(255);
  63 }
  64
  65 static void cli_perror(void)
  66 {
  67         if (flags & CLI_FLAG_QUIET)
  68                 return;
  69
  70         uci_perror(ctx, appname);
  71 }
  72
  73 static void uci_show_section(struct uci_section *p)
  74 {
  75         struct uci_element *e;
  76         const char *cname, *sname;
  77
  78         cname = p->package->e.name;
  79         sname = p->e.name;
  80         printf("%s.%s=%s\n", cname, sname, p->type);
  81         uci_foreach_element(&p->options, e) {
  82                 printf("%s.%s.%s=%s\n", cname, sname, e->name, uci_to_option(e)->value);
  83         }
  84 }
  85
  86 static void uci_show_package(struct uci_package *p)
  87 {
  88         struct uci_element *e;
  89
  90         uci_foreach_element( &p->sections, e) {
  91                 uci_show_section(uci_to_section(e));
  92         }
  93 }
  94
  95
  96 static int package_cmd(int cmd, char *package)
  97 {
  98         struct uci_package *p = NULL;
  99
 100         if (uci_load(ctx, package, &p) != UCI_OK) {
 101                 cli_perror();
 102                 return 1;
 103         }
 104         switch(cmd) {
 105         case CMD_COMMIT:
 106                 if (uci_commit(ctx, &p, false) != UCI_OK)
 107                         cli_perror();
 108                 break;
 109         case CMD_EXPORT:
 110                 uci_export(ctx, stdout, p, true);
 111                 break;
 112         case CMD_SHOW:
 113                 uci_show_package(p);
 114                 break;
 115         }
 116
 117         uci_unload(ctx, p);
 118         return 0;
 119 }
 120
 121 static int uci_do_import(int argc, char **argv)
 122 {
 123         struct uci_package *package = NULL;
 124         char *name = NULL;
 125         int ret = UCI_OK;
 126
 127         if (argc > 2)
 128                 return 255;
 129
 130         if (argc == 2)
 131                 name = argv[1];
 132         else if (flags & CLI_FLAG_MERGE)
 133                 /* need a package to merge */
 134                 return 255;
 135
 136         if (flags & CLI_FLAG_MERGE) {
 137                 if (uci_load(ctx, name, &package) != UCI_OK)
 138                         package = NULL;
 139         }
 140         ret = uci_import(ctx, input, name, &package, (name != NULL));
 141         if (ret == UCI_OK) {
 142                 if (flags & CLI_FLAG_MERGE) {
 143                         ret = uci_save(ctx, package);
 144                 } else {
 145                         struct uci_element *e;
 146                         /* loop through all config sections and overwrite existing data */
 147                         uci_foreach_element(&ctx->root, e) {
 148                                 struct uci_package *p = uci_to_package(e);
 149                                 ret = uci_commit(ctx, &p, true);
 150                         }
 151                 }
 152         }
 153
 154         if (ret != UCI_OK) {
 155                 cli_perror();
 156                 return 1;
 157         }
 158
 159         return 0;
 160 }
 161
 162 static int uci_do_package_cmd(int cmd, int argc, char **argv)
 163 {
 164         char **configs = NULL;
 165         char **p;
 166
 167         if (argc > 2)
 168                 return 255;
 169
 170         if (argc == 2)
 171                 return package_cmd(cmd, argv[1]);
 172
 173         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
 174                 cli_perror();
 175                 return 1;
 176         }
 177
 178         for (p = configs; *p; p++) {
 179                 package_cmd(cmd, *p);
 180         }
 181
 182         return 0;
 183 }
 184
 185
 186 static int uci_do_section_cmd(int cmd, int argc, char **argv)
 187 {
 188         struct uci_package *p = NULL;
 189         struct uci_element *e = NULL;
 190         char *package = NULL;
 191         char *section = NULL;
 192         char *option = NULL;
 193         char *value = NULL;
 194         char **ptr = NULL;
 195         int ret = UCI_OK;
 196
 197         if (argc != 2)
 198                 return 255;
 199
 200         switch(cmd) {
 201         case CMD_SET:
 202         case CMD_RENAME:
 203                 ptr = &value;
 204                 break;
 205         default:
 206                 break;
 207         }
 208         if (uci_parse_tuple(ctx, argv[1], &package, &section, &option, ptr) != UCI_OK)
 209                 return 1;
 210
 211         if (uci_load(ctx, package, &p) != UCI_OK) {
 212                 cli_perror();
 213                 return 1;
 214         }
 215
 216         switch(cmd) {
 217         case CMD_GET:
 218                 if (uci_lookup(ctx, &e, p, section, option) != UCI_OK)
 219                         return 1;
 220
 221                 switch(e->type) {
 222                 case UCI_TYPE_SECTION:
 223                         value = uci_to_section(e)->type;
 224                         break;
 225                 case UCI_TYPE_OPTION:
 226                         value = uci_to_option(e)->value;
 227                         break;
 228                 default:
 229                         /* should not happen */
 230                         return 1;
 231                 }
 232                 /* throw the value to stdout */
 233                 printf("%s\n", value);
 234                 break;
 235         case CMD_RENAME:
 236                 ret = uci_rename(ctx, p, section, option, value);
 237                 break;
 238         case CMD_SET:
 239                 ret = uci_set(ctx, p, section, option, value);
 240                 break;
 241         case CMD_DEL:
 242                 ret = uci_delete(ctx, p, section, option);
 243                 break;
 244         }
 245
 246         /* no save necessary for get */
 247         if (cmd == CMD_GET)
 248                 return 0;
 249
 250         /* save changes, but don't commit them yet */
 251         if (ret == UCI_OK)
 252                 ret = uci_save(ctx, p);
 253
 254         if (ret != UCI_OK) {
 255                 cli_perror();
 256                 return 1;
 257         }
 258
 259         return 0;
 260 }
 261
 262 static int uci_cmd(int argc, char **argv)
 263 {
 264         int cmd = 0;
 265
 266         if (!strcasecmp(argv[0], "show"))
 267                 cmd = CMD_SHOW;
 268         else if (!strcasecmp(argv[0], "export"))
 269                 cmd = CMD_EXPORT;
 270         else if (!strcasecmp(argv[0], "commit"))
 271                 cmd = CMD_COMMIT;
 272         else if (!strcasecmp(argv[0], "get"))
 273                 cmd = CMD_GET;
 274         else if (!strcasecmp(argv[0], "set"))
 275                 cmd = CMD_SET;
 276         else if (!strcasecmp(argv[0], "ren") ||
 277                  !strcasecmp(argv[0], "rename"))
 278                 cmd = CMD_RENAME;
 279         else if (!strcasecmp(argv[0], "del"))
 280                 cmd = CMD_DEL;
 281         else if (!strcasecmp(argv[0], "import"))
 282                 cmd = CMD_IMPORT;
 283         else
 284                 cmd = -1;
 285
 286         switch(cmd) {
 287                 case CMD_GET:
 288                 case CMD_SET:
 289                 case CMD_DEL:
 290                 case CMD_RENAME:
 291                         return uci_do_section_cmd(cmd, argc, argv);
 292                 case CMD_SHOW:
 293                 case CMD_EXPORT:
 294                 case CMD_COMMIT:
 295                         return uci_do_package_cmd(cmd, argc, argv);
 296                 case CMD_IMPORT:
 297                         return uci_do_import(argc, argv);
 298                 default:
 299                         return 255;
 300         }
 301 }
 302
 303 int main(int argc, char **argv)
 304 {
 305         int ret;
 306         int c;
 307
 308         input = stdin;
 309         ctx = uci_alloc_context();
 310         if (!ctx) {
 311                 fprintf(stderr, "Out of memory\n");
 312                 return 1;
 313         }
 314
 315         while((c = getopt(argc, argv, "mf:sSnNq")) != -1) {
 316                 switch(c) {
 317                         case 'f':
 318                                 input = fopen(optarg, "r");
 319                                 if (!input) {
 320                                         perror("uci");
 321                                         return 1;
 322                                 }
 323                                 break;
 324                         case 'm':
 325                                 flags |= CLI_FLAG_MERGE;
 326                                 break;
 327                         case 's':
 328                                 ctx->flags |= UCI_FLAG_STRICT;
 329                                 break;
 330                         case 'S':
 331                                 ctx->flags &= ~UCI_FLAG_STRICT;
 332                                 ctx->flags |= UCI_FLAG_PERROR;
 333                                 break;
 334                         case 'n':
 335                                 ctx->flags |= UCI_FLAG_EXPORT_NAME;
 336                                 break;
 337                         case 'N':
 338                                 ctx->flags &= ~UCI_FLAG_EXPORT_NAME;
 339                                 break;
 340                         case 'q':
 341                                 flags |= CLI_FLAG_QUIET;
 342                                 break;
 343                         default:
 344                                 uci_usage(argc, argv);
 345                                 break;
 346                 }
 347         }
 348         if (optind > 1)
 349                 argv[optind - 1] = argv[0];
 350         argv += optind - 1;
 351         argc -= optind - 1;
 352
 353         if (argc < 2)
 354                 uci_usage(argc, argv);
 355         ret = uci_cmd(argc - 1, argv + 1);
 356         if (input != stdin)
 357                 fclose(input);
 358         if (ret == 255)
 359                 uci_usage(argc, argv);
 360
 361         uci_free_context(ctx);
 362
 363         return ret;
 364 }