text: /* LibMemcached
   * Copyright (C) 2011-2012 Data Differential, http://datadifferential.com/
   * Copyright (C) 2006-2009 Brian Aker
   * All rights reserved.
   *
   * Use and distribution licensed under the BSD license.  See
   * the COPYING file in the parent directory for full text.
   *
   * Summary:
   *
   */
  
  #include "mem_config.h"
  
  #include <cerrno>
  #include <cstdio>
  #include <cstdlib>
  #include <cstring>
  #include <fcntl.h>
  #include <getopt.h>
  #include <inttypes.h>
  #include <iostream>
  #include <sys/stat.h>
  #include <sys/types.h>
  #include <sys/types.h>
  #include <unistd.h>
  
  #include <libmemcached-1.2/memcached.h>
  
  #include "client_options.h"
  #include "utilities.h"
  
  #define PROGRAM_NAME "memdump"
  #define PROGRAM_DESCRIPTION "Dump all values from one or many servers."
  
  /* Prototypes */
  static void options_parse(int argc, char *argv[]);
  
  static bool opt_binary=0;
  static int opt_verbose= 0;
  static char *opt_servers= NULL;
  static char *opt_hash= NULL;
  static char *opt_username;
  static char *opt_passwd;
  
  /* Print the keys and counter how many were found */
  static memcached_return_t key_printer(const memcached_st *,
                                        const char *key, size_t key_length,
                                        void *)
  {
    std::cout.write(key, key_length);
    std::cout << std::endl;
  
    return MEMCACHED_SUCCESS;
  }
  
  int main(int argc, char *argv[])
  {
    memcached_dump_fn callbacks[1];
  
    callbacks[0]= &key_printer;
  
    options_parse(argc, argv);
  
    if (opt_servers == NULL)
    {
      char *temp;
  
      if ((temp= getenv("MEMCACHED_SERVERS")))
      {
        opt_servers= strdup(temp);
      }
      else if (argc >= 1 and argv[--argc])
      {
        opt_servers= strdup(argv[argc]);
      }
  
      if (opt_servers == NULL)
      {
        std::cerr << "No Servers provided" << std::endl;
        exit(EXIT_FAILURE);
      }
    }
  
    memcached_server_st* servers= memcached_servers_parse(opt_servers);
    if (servers == NULL or memcached_server_list_count(servers) == 0)
    {
      std::cerr << "Invalid server list provided:" << opt_servers << std::endl;
      return EXIT_FAILURE;
    }
  
    memcached_st *memc= memcached_create(NULL);
    if (memc == NULL)
    {
      std::cerr << "Could not allocate a memcached_st structure.\n" << std::endl;
      return EXIT_FAILURE;
    }
    process_hash_option(memc, opt_hash);
  
    memcached_server_push(memc, servers);
    memcached_server_list_free(servers);
    memcached_behavior_set(memc, MEMCACHED_BEHAVIOR_BINARY_PROTOCOL,
                           (uint64_t)opt_binary);
  
    if (opt_username and libmemcached_has_feature(LIBMEMCACHED_FEATURE_HAS_SASL) == false)
    {
      memcached_free(memc);
      std::cerr << "--username was supplied, but binary was not built with SASL support." << std::endl;
      return EXIT_FAILURE;
    }
  
    if (opt_username)
    {
      memcached_return_t ret;
      if (memcached_failed(ret= memcached_set_sasl_auth_data(memc, opt_username, opt_passwd)))
      {
        std::cerr << memcached_last_error_message(memc) << std::endl;
        memcached_free(memc);
        return EXIT_FAILURE;
      }
    }
  
    memcached_return_t rc= memcached_dump(memc, callbacks, NULL, 1);
  
    int exit_code= EXIT_SUCCESS;
    if (memcached_failed(rc))
    {
      if (opt_verbose)
      {
        std::cerr << "Failed to dump keys: " << memcached_last_error_message(memc) << std::endl;
      }
      exit_code= EXIT_FAILURE;
    }
  
    memcached_free(memc);
  
    if (opt_servers)
    {
      free(opt_servers);
    }
    if (opt_hash)
    {
      free(opt_hash);
    }
  
    return exit_code;
  }
  
  static void options_parse(int argc, char *argv[])
  {
    static struct option long_options[]=
      {
        {(OPTIONSTRING)"version", no_argument, NULL, OPT_VERSION},
        {(OPTIONSTRING)"help", no_argument, NULL, OPT_HELP},
        {(OPTIONSTRING)"quiet", no_argument, NULL, OPT_QUIET},
        {(OPTIONSTRING)"verbose", no_argument, &opt_verbose, OPT_VERBOSE},
        {(OPTIONSTRING)"debug", no_argument, &opt_verbose, OPT_DEBUG},
        {(OPTIONSTRING)"servers", required_argument, NULL, OPT_SERVERS},
        {(OPTIONSTRING)"hash", required_argument, NULL, OPT_HASH},
        {(OPTIONSTRING)"binary", no_argument, NULL, OPT_BINARY},
        {(OPTIONSTRING)"username", required_argument, NULL, OPT_USERNAME},
        {(OPTIONSTRING)"password", required_argument, NULL, OPT_PASSWD},
        {0, 0, 0, 0}
      };
  
    int option_index= 0;
    bool opt_version= false;
    bool opt_help= false;
    while (1)
    {
      int option_rv= getopt_long(argc, argv, "Vhvds:", long_options, &option_index);
  
      if (option_rv == -1) break;
  
      switch (option_rv)
      {
      case 0:
        break;
  
      case OPT_BINARY:
        opt_binary= true;
        break;
  
      case OPT_VERBOSE: /* --verbose or -v */
        opt_verbose= OPT_VERBOSE;
        break;
  
      case OPT_DEBUG: /* --debug or -d */
        opt_verbose= OPT_DEBUG;
        break;
  
      case OPT_VERSION: /* --version or -V */
        opt_verbose= true;
        break;
  
      case OPT_HELP: /* --help or -h */
        opt_help= true;
        break;
  
      case OPT_SERVERS: /* --servers or -s */
        opt_servers= strdup(optarg);
        break;
  
      case OPT_HASH:
        opt_hash= strdup(optarg);
        break;
  
      case OPT_USERNAME:
         opt_username= optarg;
         break;
  
      case OPT_PASSWD:
         opt_passwd= optarg;
         break;
  
      case OPT_QUIET:
        close_stdio();
        break;
  
      case '?':
        /* getopt_long already printed an error message. */
        exit(1);
      default:
        abort();
      }
    }
  
    if (opt_version)
    {
      version_command(PROGRAM_NAME);
      exit(EXIT_SUCCESS);
    }
  
    if (opt_help)
    {
      help_command(PROGRAM_NAME, PROGRAM_DESCRIPTION, long_options, NULL);
      exit(EXIT_SUCCESS);
    }
  }
  