git.m6w6.name Git - m6w6/libmemcached/blob - src/bin/memerror.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 <climits>
  23
  24 #include <getopt.h>
  25 #include <iostream>
  26 #include <unistd.h>
  27
  28 #include "libmemcached-1.0/memcached.h"
  29
  30 #include "utilities.h"
  31
  32 #define PROGRAM_NAME        "memerror"
  33 #define PROGRAM_DESCRIPTION "Translate a memcached errror code into a string."
  34
  35 /* Prototypes */
  36 void options_parse(int argc, char *argv[]);
  37
  38 int main(int argc, char *argv[]) {
  39   options_parse(argc, argv);
  40
  41   if (argc < 2) {
  42     return EXIT_FAILURE;
  43   }
  44
  45   while (optind < argc) {
  46     errno = 0;
  47     char *nptr;
  48     unsigned long value = strtoul(argv[optind], &nptr, 10);
  49
  50     if ((errno) or (nptr == argv[optind] and value == 0)
  51         or (value == ULONG_MAX and errno == ERANGE) or (value == 0 and errno == EINVAL))
  52     {
  53       std::cerr << "strtoul() was unable to parse given value" << std::endl;
  54       return EXIT_FAILURE;
  55     }
  56
  57     if (value < MEMCACHED_MAXIMUM_RETURN) {
  58       std::cout << memcached_strerror(NULL, (memcached_return_t) value) << std::endl;
  59     } else {
  60       std::cerr << memcached_strerror(NULL, MEMCACHED_MAXIMUM_RETURN) << std::endl;
  61       return EXIT_FAILURE;
  62     }
  63
  64     optind++;
  65   }
  66
  67   return EXIT_SUCCESS;
  68 }
  69
  70 void options_parse(int argc, char *argv[]) {
  71   static struct option long_options[] = {
  72       {(OPTIONSTRING) "version", no_argument, NULL, OPT_VERSION},
  73       {(OPTIONSTRING) "help", no_argument, NULL, OPT_HELP},
  74       {0, 0, 0, 0},
  75   };
  76
  77   bool opt_version = false;
  78   bool opt_help = false;
  79   int option_index = 0;
  80   while (1) {
  81     int option_rv = getopt_long(argc, argv, "Vhvds:", long_options, &option_index);
  82     if (option_rv == -1) {
  83       break;
  84     }
  85
  86     switch (option_rv) {
  87     case 0:
  88       break;
  89
  90     case OPT_VERSION: /* --version or -V */
  91       opt_version = true;
  92       break;
  93
  94     case OPT_HELP: /* --help or -h */
  95       opt_help = true;
  96       break;
  97
  98     case '?':
  99       /* getopt_long already printed an error message. */
 100       exit(EXIT_FAILURE);
 101
 102     default:
 103       exit(EXIT_FAILURE);
 104     }
 105   }
 106
 107   if (opt_version) {
 108     version_command(PROGRAM_NAME);
 109     exit(EXIT_SUCCESS);
 110   }
 111
 112   if (opt_help) {
 113     help_command(PROGRAM_NAME, PROGRAM_DESCRIPTION, long_options, NULL);
 114     exit(EXIT_SUCCESS);
 115   }
 116 }