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