ctdb/common/conf_tool.c

   1 /*
   2    Config options tool
   3
   4    Copyright (C) Amitay Isaacs  2018
   5
   6    This program is free software; you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation; either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program; if not, see <http://www.gnu.org/licenses/>.
  18 */
  19
  20 #include "replace.h"
  21
  22 #include <talloc.h>
  23
  24 #include "lib/util/debug.h"
  25
  26 #include "common/logging.h"
  27 #include "common/cmdline.h"
  28 #include "common/conf.h"
  29 #include "common/path.h"
  30
  31 #include "common/logging_conf.h"
  32 #include "cluster/cluster_conf.h"
  33 #include "database/database_conf.h"
  34 #include "event/event_conf.h"
  35 #include "failover/failover_conf.h"
  36 #include "server/legacy_conf.h"
  37
  38 #include "common/conf_tool.h"
  39
  40 struct conf_tool_context {
  41         struct cmdline_context *cmdline;
  42         const char *conf_file;
  43         struct conf_context *conf;
  44 };
  45
  46 static int conf_tool_dump(TALLOC_CTX *mem_ctx,
  47                           int argc,
  48                           const char **argv,
  49                           void *private_data)
  50 {
  51         struct conf_tool_context *ctx = talloc_get_type_abort(
  52                 private_data, struct conf_tool_context);
  53         int ret;
  54
  55         if (argc != 0) {
  56                 cmdline_usage(ctx->cmdline, "dump");
  57                 return EINVAL;
  58         }
  59
  60         ret = conf_load(ctx->conf, ctx->conf_file, true);
  61         if (ret != 0 && ret != ENOENT) {
  62                 D_ERR("Failed to load config file %s\n", ctx->conf_file);
  63                 return ret;
  64         }
  65
  66         conf_dump(ctx->conf, stdout);
  67         return 0;
  68 }
  69
  70 static int conf_tool_get(TALLOC_CTX *mem_ctx,
  71                          int argc,
  72                          const char **argv,
  73                          void *private_data)
  74 {
  75         struct conf_tool_context *ctx = talloc_get_type_abort(
  76                 private_data, struct conf_tool_context);
  77         const char *section, *option;
  78         enum conf_type type;
  79         int ret;
  80         bool ok;
  81         const char *s_val = NULL;
  82         int i_val;
  83         bool b_val;
  84
  85         if (argc != 2) {
  86                 cmdline_usage(ctx->cmdline, "get");
  87                 return EINVAL;
  88         }
  89
  90         section = argv[0];
  91         option = argv[1];
  92
  93         ok = conf_query(ctx->conf, section, option, &type);
  94         if (!ok) {
  95                 D_ERR("Configuration option [%s] -> \"%s\" not defined\n",
  96                       section, option);
  97                 return ENOENT;
  98         }
  99
 100         ret = conf_load(ctx->conf, ctx->conf_file, true);
 101         if (ret != 0 && ret != ENOENT) {
 102                 D_ERR("Failed to load config file %s\n", ctx->conf_file);
 103                 return ret;
 104         }
 105
 106         switch (type) {
 107         case CONF_STRING:
 108                 ret = conf_get_string(ctx->conf,
 109                                       section,
 110                                       option,
 111                                       &s_val,
 112                                       NULL);
 113                 break;
 114
 115         case CONF_INTEGER:
 116                 ret = conf_get_integer(ctx->conf,
 117                                        section,
 118                                        option,
 119                                        &i_val,
 120                                        NULL);
 121                 break;
 122
 123         case CONF_BOOLEAN:
 124                 ret = conf_get_boolean(ctx->conf,
 125                                        section,
 126                                        option,
 127                                        &b_val,
 128                                        NULL);
 129                 break;
 130
 131         default:
 132                 D_ERR("Unknown configuration option type\n");
 133                 return EINVAL;
 134         }
 135
 136         if (ret != 0) {
 137                 D_ERR("Failed to get configuration option value\n");
 138                 return ret;
 139         }
 140
 141         switch (type) {
 142         case CONF_STRING:
 143                 printf("%s\n", s_val == NULL ? "" : s_val);
 144                 break;
 145
 146         case CONF_INTEGER:
 147                 printf("%d\n", i_val);
 148                 break;
 149
 150         case CONF_BOOLEAN:
 151                 printf("%s\n", b_val ? "true" : "false");
 152                 break;
 153         }
 154
 155         return 0;
 156 }
 157
 158 static int conf_tool_validate(TALLOC_CTX *mem_ctx,
 159                               int argc,
 160                               const char **argv,
 161                               void *private_data)
 162 {
 163         struct conf_tool_context *ctx = talloc_get_type_abort(
 164                 private_data, struct conf_tool_context);
 165         int ret;
 166
 167         if (argc != 0) {
 168                 cmdline_usage(ctx->cmdline, "validate");
 169                 return EINVAL;
 170         }
 171
 172         ret = conf_load(ctx->conf, ctx->conf_file, false);
 173         if (ret != 0) {
 174                 D_ERR("Failed to load config file %s\n", ctx->conf_file);
 175                 return ret;
 176         }
 177
 178         return 0;
 179 }
 180
 181 struct cmdline_command conf_commands[] = {
 182         { "dump", conf_tool_dump,
 183                 "Dump configuration", NULL },
 184         { "get", conf_tool_get,
 185                 "Get a config value", "<section> <key>" },
 186         { "validate", conf_tool_validate,
 187                 "Validate configuration file", NULL },
 188         CMDLINE_TABLEEND
 189 };
 190
 191 int conf_tool_init(TALLOC_CTX *mem_ctx,
 192                    const char *prog,
 193                    struct poptOption *options,
 194                    int argc,
 195                    const char **argv,
 196                    bool parse_options,
 197                    struct conf_tool_context **result)
 198 {
 199         struct conf_tool_context *ctx;
 200         int ret;
 201
 202         ctx = talloc_zero(mem_ctx, struct conf_tool_context);
 203         if (ctx == NULL) {
 204                 D_ERR("Memory allocation error\n");
 205                 return ENOMEM;
 206         }
 207
 208         ret = cmdline_init(ctx, prog, options, conf_commands, &ctx->cmdline);
 209         if (ret != 0) {
 210                 D_ERR("Failed to initialize cmdline, ret=%d\n", ret);
 211                 talloc_free(ctx);
 212                 return ret;
 213         }
 214
 215         ret = cmdline_parse(ctx->cmdline, argc, argv, parse_options);
 216         if (ret != 0) {
 217                 cmdline_usage(ctx->cmdline, NULL);
 218                 talloc_free(ctx);
 219                 return ret;
 220         }
 221
 222         *result = ctx;
 223         return 0;
 224 }
 225
 226 int conf_tool_run(struct conf_tool_context *ctx, int *result)
 227 {
 228         int ret;
 229
 230         ctx->conf_file = path_config(ctx);
 231         if (ctx->conf_file == NULL) {
 232                 D_ERR("Memory allocation error\n");
 233                 return ENOMEM;
 234         }
 235
 236         ret = conf_init(ctx, &ctx->conf);
 237         if (ret != 0) {
 238                 D_ERR("Failed to initialize config\n");
 239                 return ret;
 240         }
 241
 242         /* Call functions to initialize config sections/variables */
 243         logging_conf_init(ctx->conf, NULL);
 244         cluster_conf_init(ctx->conf);
 245         database_conf_init(ctx->conf);
 246         event_conf_init(ctx->conf);
 247         failover_conf_init(ctx->conf);
 248         legacy_conf_init(ctx->conf);
 249
 250         if (! conf_valid(ctx->conf)) {
 251                 D_ERR("Failed to define configuration options\n");
 252                 return EINVAL;
 253         }
 254
 255         ret = cmdline_run(ctx->cmdline, ctx, result);
 256         return ret;
 257 }
 258
 259 #ifdef CTDB_CONF_TOOL
 260
 261 static struct {
 262         const char *debug;
 263 } conf_data = {
 264         .debug = "ERROR",
 265 };
 266
 267 struct poptOption conf_options[] = {
 268         POPT_AUTOHELP
 269         { "debug", 'd', POPT_ARG_STRING, &conf_data.debug, 0,
 270                 "debug level", "ERROR|WARNING|NOTICE|INFO|DEBUG" },
 271         POPT_TABLEEND
 272 };
 273
 274 int main(int argc, const char **argv)
 275 {
 276         TALLOC_CTX *mem_ctx;
 277         struct conf_tool_context *ctx;
 278         int ret, result;
 279         int level;
 280         bool ok;
 281
 282         mem_ctx = talloc_new(NULL);
 283         if (mem_ctx == NULL) {
 284                 fprintf(stderr, "Memory allocation error\n");
 285                 exit(1);
 286         }
 287
 288         ret = conf_tool_init(mem_ctx,
 289                              "ctdb-config",
 290                              conf_options,
 291                              argc,
 292                              argv,
 293                              true,
 294                              &ctx);
 295         if (ret != 0) {
 296                 talloc_free(mem_ctx);
 297                 exit(1);
 298         }
 299
 300         setup_logging("ctdb-config", DEBUG_STDERR);
 301         ok = debug_level_parse(conf_data.debug, &level);
 302         if (!ok) {
 303                 level = DEBUG_ERR;
 304         }
 305         debuglevel_set(level);
 306
 307         ret = conf_tool_run(ctx, &result);
 308         if (ret != 0) {
 309                 result = 1;
 310         }
 311
 312         talloc_free(mem_ctx);
 313         exit(result);
 314 }
 315
 316 #endif /* CTDB_CONF_TOOL */