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) != 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 **configs = NULL;
 113         char *name = NULL;
 114         int ret = UCI_OK;
 115         char **p;
 116
 117         if (argc > 2)
 118                 return 255;
 119
 120         if (argc == 2)
 121                 name = argv[1];
 122         else if (flags & CLI_FLAG_MERGE)
 123                 /* need a package to merge */
 124                 return 255;
 125
 126         if (flags & CLI_FLAG_MERGE) {
 127                 if (uci_load(ctx, name, &package) != UCI_OK)
 128                         package = NULL;
 129         }
 130         ret = uci_import(ctx, input, name, &package, (name != NULL));
 131         if ((ret == UCI_OK) && (flags & CLI_FLAG_MERGE)) {
 132                 ret = uci_save(ctx, package);
 133         }
 134
 135         if (ret != UCI_OK) {
 136                 uci_perror(ctx, appname);
 137                 return 1;
 138         }
 139
 140         return 0;
 141 }
 142
 143 static int uci_do_package_cmd(int cmd, int argc, char **argv)
 144 {
 145         char **configs = NULL;
 146         char **p;
 147
 148         if (argc > 2)
 149                 return 255;
 150
 151         if (argc == 2)
 152                 return package_cmd(cmd, argv[1]);
 153
 154         if ((uci_list_configs(ctx, &configs) != UCI_OK) || !configs) {
 155                 uci_perror(ctx, appname);
 156                 return 1;
 157         }
 158
 159         for (p = configs; *p; p++) {
 160                 package_cmd(cmd, *p);
 161         }
 162
 163         return 0;
 164 }
 165
 166
 167 static int uci_do_section_cmd(int cmd, int argc, char **argv)
 168 {
 169         struct uci_package *p = NULL;
 170         struct uci_element *e = NULL;
 171         char *package = NULL;
 172         char *section = NULL;
 173         char *option = NULL;
 174         char *value = NULL;
 175         char **ptr = NULL;
 176         int ret = UCI_OK;
 177
 178         if (argc != 2)
 179                 return 255;
 180
 181         switch(cmd) {
 182         case CMD_SET:
 183         case CMD_RENAME:
 184                 ptr = &value;
 185                 break;
 186         default:
 187                 break;
 188         }
 189         if (uci_parse_tuple(ctx, argv[1], &package, &section, &option, ptr) != UCI_OK)
 190                 return 1;
 191
 192         if (uci_load(ctx, package, &p) != UCI_OK) {
 193                 uci_perror(ctx, appname);
 194                 return 1;
 195         }
 196
 197         switch(cmd) {
 198         case CMD_GET:
 199                 if (uci_lookup(ctx, &e, p, section, option) != UCI_OK)
 200                         return 1;
 201
 202                 switch(e->type) {
 203                 case UCI_TYPE_SECTION:
 204                         value = uci_to_section(e)->type;
 205                         break;
 206                 case UCI_TYPE_OPTION:
 207                         value = uci_to_option(e)->value;
 208                         break;
 209                 default:
 210                         /* should not happen */
 211                         return 1;
 212                 }
 213                 /* throw the value to stdout */
 214                 printf("%s\n", value);
 215                 break;
 216         case CMD_RENAME:
 217                 ret = uci_rename(ctx, p, section, option, value);
 218                 break;
 219         case CMD_SET:
 220                 ret = uci_set(ctx, p, section, option, value);
 221                 break;
 222         case CMD_DEL:
 223                 ret = uci_delete(ctx, p, section, option);
 224                 break;
 225         }
 226
 227         /* no save necessary for get */
 228         if (cmd == CMD_GET)
 229                 return 0;
 230
 231         /* save changes, but don't commit them yet */
 232         if (ret == UCI_OK)
 233                 ret = uci_save(ctx, p);
 234
 235         if (ret != UCI_OK) {
 236                 uci_perror(ctx, appname);
 237                 return 1;
 238         }
 239
 240         return 0;
 241 }
 242
 243 static int uci_cmd(int argc, char **argv)
 244 {
 245         int cmd = 0;
 246
 247         if (!strcasecmp(argv[0], "show"))
 248                 cmd = CMD_SHOW;
 249         else if (!strcasecmp(argv[0], "export"))
 250                 cmd = CMD_EXPORT;
 251         else if (!strcasecmp(argv[0], "commit"))
 252                 cmd = CMD_COMMIT;
 253         else if (!strcasecmp(argv[0], "get"))
 254                 cmd = CMD_GET;
 255         else if (!strcasecmp(argv[0], "set"))
 256                 cmd = CMD_SET;
 257         else if (!strcasecmp(argv[0], "ren") ||
 258                  !strcasecmp(argv[0], "rename"))
 259                 cmd = CMD_RENAME;
 260         else if (!strcasecmp(argv[0], "del"))
 261                 cmd = CMD_DEL;
 262         else if (!strcasecmp(argv[0], "import"))
 263                 cmd = CMD_IMPORT;
 264         else
 265                 cmd = -1;
 266
 267         switch(cmd) {
 268                 case CMD_GET:
 269                 case CMD_SET:
 270                 case CMD_DEL:
 271                 case CMD_RENAME:
 272                         return uci_do_section_cmd(cmd, argc, argv);
 273                 case CMD_SHOW:
 274                 case CMD_EXPORT:
 275                 case CMD_COMMIT:
 276                         return uci_do_package_cmd(cmd, argc, argv);
 277                 case CMD_IMPORT:
 278                         return uci_do_import(argc, argv);
 279                 default:
 280                         return 255;
 281         }
 282 }
 283
 284 int main(int argc, char **argv)
 285 {
 286         int ret;
 287         int c;
 288
 289         ctx = uci_alloc_context();
 290         if (!ctx) {
 291                 fprintf(stderr, "Out of memory\n");
 292                 return 1;
 293         }
 294
 295         while((c = getopt(argc, argv, "mfsS")) != -1) {
 296                 switch(c) {
 297                         case 'f':
 298                                 input = fopen(optarg, "r");
 299                                 if (!input) {
 300                                         perror("uci");
 301                                         return 1;
 302                                 }
 303                                 break;
 304                         case 'm':
 305                                 flags |= CLI_FLAG_MERGE;
 306                                 break;
 307                         case 's':
 308                                 ctx->flags |= UCI_FLAG_STRICT;
 309                                 break;
 310                         case 'S':
 311                                 ctx->flags &= ~UCI_FLAG_STRICT;
 312                                 ctx->flags |= UCI_FLAG_PERROR;
 313                                 break;
 314                         default:
 315                                 uci_usage(argc, argv);
 316                                 break;
 317                 }
 318         }
 319         if (optind > 1)
 320                 argv[optind - 1] = argv[0];
 321         argv += optind - 1;
 322         argc -= optind - 1;
 323
 324         if (argc < 2)
 325                 uci_usage(argc, argv);
 326         ret = uci_cmd(argc - 1, argv + 1);
 327         if (input != stdin)
 328                 fclose(input);
 329         if (ret == 255)
 330                 uci_usage(argc, argv);
 331
 332         uci_free_context(ctx);
 333
 334         return ret;
 335 }