git.m6w6.name Git - m6w6/libmemcached/blob - src/bin/memdump.cc

   1 /*
   2     +--------------------------------------------------------------------+
   3     | libmemcached - C/C++ Client Library for memcached                  |
   4     +--------------------------------------------------------------------+
   5     | Redistribution and use in source and binary forms, with or without |
   6     | modification, are permitted under the terms of the BSD license.    |
   7     | You should have received a copy of the license in a bundled file   |
   8     | named LICENSE; in case you did not receive a copy you can review   |
   9     | the terms online at: https://opensource.org/licenses/BSD-3-Clause  |
  10     +--------------------------------------------------------------------+
  11     | Copyright (c) 2006-2014 Brian Aker   https://datadifferential.com/ |
  12     | Copyright (c) 2020 Michael Wallner   <mike@php.net>                |
  13     +--------------------------------------------------------------------+
  14 */
  15
  16 #include "mem_config.h"
  17
  18 #include <cerrno>
  19 #include <cstdio>
  20 #include <cstdlib>
  21 #include <cstring>
  22 #include <fcntl.h>
  23 #include <getopt.h>
  24 #include <inttypes.h>
  25 #include <iostream>
  26 #include <sys/stat.h>
  27 #include <sys/types.h>
  28 #include <sys/types.h>
  29 #include <unistd.h>
  30
  31 #include "libmemcached-1.0/memcached.h"
  32
  33 #include "client_options.h"
  34 #include "utilities.h"
  35
  36 #define PROGRAM_NAME        "memdump"
  37 #define PROGRAM_DESCRIPTION "Dump all values from one or many servers."
  38
  39 /* Prototypes */
  40 static void options_parse(int argc, char *argv[]);
  41
  42 static bool opt_binary = 0;
  43 static int opt_verbose = 0;
  44 static char *opt_servers = NULL;
  45 static char *opt_hash = NULL;
  46 static char *opt_username;
  47 static char *opt_passwd;
  48
  49 /* Print the keys and counter how many were found */
  50 static memcached_return_t key_printer(const memcached_st *, const char *key, size_t key_length,
  51                                       void *) {
  52   std::cout.write(key, key_length);
  53   std::cout << std::endl;
  54
  55   return MEMCACHED_SUCCESS;
  56 }
  57
  58 int main(int argc, char *argv[]) {
  59   memcached_dump_fn callbacks[1];
  60
  61   callbacks[0] = &key_printer;
  62
  63   options_parse(argc, argv);
  64
  65   if (opt_servers == NULL) {
  66     char *temp;
  67
  68     if ((temp = getenv("MEMCACHED_SERVERS"))) {
  69       opt_servers = strdup(temp);
  70     } else if (argc > 1 and argv[--argc]) {
  71       opt_servers = strdup(argv[argc]);
  72     }
  73
  74     if (opt_servers == NULL) {
  75       std::cerr << "No Servers provided" << std::endl;
  76       exit(EXIT_FAILURE);
  77     }
  78   }
  79
  80   memcached_server_st *servers = memcached_servers_parse(opt_servers);
  81   if (servers == NULL or memcached_server_list_count(servers) == 0) {
  82     std::cerr << "Invalid server list provided:" << opt_servers << std::endl;
  83     return EXIT_FAILURE;
  84   }
  85
  86   memcached_st *memc = memcached_create(NULL);
  87   if (memc == NULL) {
  88     std::cerr << "Could not allocate a memcached_st structure.\n" << std::endl;
  89     return EXIT_FAILURE;
  90   }
  91   process_hash_option(memc, opt_hash);
  92
  93   memcached_server_push(memc, servers);
  94   memcached_server_list_free(servers);
  95   memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_BINARY_PROTOCOL, (uint64_t) opt_binary);
  96
  97   if (opt_username and LIBMEMCACHED_WITH_SASL_SUPPORT == 0) {
  98     memcached_free(memc);
  99     std::cerr << "--username was supplied, but binary was not built with SASL support."
 100               << std::endl;
 101     return EXIT_FAILURE;
 102   }
 103
 104   if (opt_username) {
 105     memcached_return_t ret;
 106     if (memcached_failed(ret = memcached_set_sasl_auth_data(memc, opt_username, opt_passwd))) {
 107       std::cerr << memcached_last_error_message(memc) << std::endl;
 108       memcached_free(memc);
 109       return EXIT_FAILURE;
 110     }
 111   }
 112
 113   memcached_return_t rc = memcached_dump(memc, callbacks, NULL, 1);
 114
 115   int exit_code = EXIT_SUCCESS;
 116   if (memcached_failed(rc)) {
 117     if (opt_verbose) {
 118       std::cerr << "Failed to dump keys: " << memcached_last_error_message(memc) << std::endl;
 119     }
 120     exit_code = EXIT_FAILURE;
 121   }
 122
 123   memcached_free(memc);
 124
 125   if (opt_servers) {
 126     free(opt_servers);
 127   }
 128   if (opt_hash) {
 129     free(opt_hash);
 130   }
 131
 132   return exit_code;
 133 }
 134
 135 static void options_parse(int argc, char *argv[]) {
 136   static struct option long_options[] = {
 137       {(OPTIONSTRING) "version", no_argument, NULL, OPT_VERSION},
 138       {(OPTIONSTRING) "help", no_argument, NULL, OPT_HELP},
 139       {(OPTIONSTRING) "quiet", no_argument, NULL, OPT_QUIET},
 140       {(OPTIONSTRING) "verbose", no_argument, &opt_verbose, OPT_VERBOSE},
 141       {(OPTIONSTRING) "debug", no_argument, &opt_verbose, OPT_DEBUG},
 142       {(OPTIONSTRING) "servers", required_argument, NULL, OPT_SERVERS},
 143       {(OPTIONSTRING) "hash", required_argument, NULL, OPT_HASH},
 144       {(OPTIONSTRING) "binary", no_argument, NULL, OPT_BINARY},
 145       {(OPTIONSTRING) "username", required_argument, NULL, OPT_USERNAME},
 146       {(OPTIONSTRING) "password", required_argument, NULL, OPT_PASSWD},
 147       {0, 0, 0, 0}};
 148
 149   int option_index = 0;
 150   bool opt_version = false;
 151   bool opt_help = false;
 152   while (1) {
 153     int option_rv = getopt_long(argc, argv, "Vhvds:", long_options, &option_index);
 154
 155     if (option_rv == -1)
 156       break;
 157
 158     switch (option_rv) {
 159     case 0:
 160       break;
 161
 162     case OPT_BINARY:
 163       opt_binary = true;
 164       break;
 165
 166     case OPT_VERBOSE: /* --verbose or -v */
 167       opt_verbose = OPT_VERBOSE;
 168       break;
 169
 170     case OPT_DEBUG: /* --debug or -d */
 171       opt_verbose = OPT_DEBUG;
 172       break;
 173
 174     case OPT_VERSION: /* --version or -V */
 175       opt_verbose = true;
 176       break;
 177
 178     case OPT_HELP: /* --help or -h */
 179       opt_help = true;
 180       break;
 181
 182     case OPT_SERVERS: /* --servers or -s */
 183       opt_servers = strdup(optarg);
 184       break;
 185
 186     case OPT_HASH:
 187       opt_hash = strdup(optarg);
 188       break;
 189
 190     case OPT_USERNAME:
 191       opt_username = optarg;
 192       break;
 193
 194     case OPT_PASSWD:
 195       opt_passwd = optarg;
 196       break;
 197
 198     case OPT_QUIET:
 199       close_stdio();
 200       break;
 201
 202     case '?':
 203       /* getopt_long already printed an error message. */
 204       exit(1);
 205     default:
 206       abort();
 207     }
 208   }
 209
 210   if (opt_version) {
 211     version_command(PROGRAM_NAME);
 212     exit(EXIT_SUCCESS);
 213   }
 214
 215   if (opt_help) {
 216     help_command(PROGRAM_NAME, PROGRAM_DESCRIPTION, long_options, NULL);
 217     exit(EXIT_SUCCESS);
 218   }
 219 }