src/bin/multiuser/userdel.cpp

   1 /*
   2  * Copyright 2013, Ingo Weinhold, ingo_weinhold@gmx.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6 #include <getopt.h>
   7 #include <pwd.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11
  12 #include <OS.h>
  13
  14 #include <RegistrarDefs.h>
  15 #include <user_group.h>
  16 #include <util/KMessage.h>
  17
  18 #include "multiuser_utils.h"
  19
  20
  21 extern const char *__progname;
  22
  23
  24 static const char* kUsage =
  25         "Usage: %s [ <options> ] <user name>\n"
  26         "Deletes the specified user.\n"
  27         "\n"
  28         "Options:\n"
  29         "  -h, --help\n"
  30         "    Print usage info.\n"
  31         ;
  32
  33 static void
  34 print_usage_and_exit(bool error)
  35 {
  36         fprintf(error ? stderr : stdout, kUsage, __progname);
  37         exit(error ? 1 : 0);
  38 }
  39
  40
  41 int
  42 main(int argc, const char* const* argv)
  43 {
  44         while (true) {
  45                 static struct option sLongOptions[] = {
  46                         { "help", no_argument, 0, 'h' },
  47                         { 0, 0, 0, 0 }
  48                 };
  49
  50                 opterr = 0; // don't print errors
  51                 int c = getopt_long(argc, (char**)argv, "h", sLongOptions, NULL);
  52                 if (c == -1)
  53                         break;
  54
  55
  56                 switch (c) {
  57                         case 'h':
  58                                 print_usage_and_exit(false);
  59                                 break;
  60
  61                         default:
  62                                 print_usage_and_exit(true);
  63                                 break;
  64                 }
  65         }
  66
  67         if (optind != argc - 1)
  68                 print_usage_and_exit(true);
  69
  70         const char* user = argv[optind];
  71
  72         if (geteuid() != 0) {
  73                 fprintf(stderr, "Error: Only root may delete users.\n");
  74                 exit(1);
  75         }
  76
  77         if (getpwnam(user) == NULL) {
  78                 fprintf(stderr, "Error: User \"%s\" doesn't exist.\n", user);
  79                 exit(1);
  80         }
  81
  82         // prepare request for the registrar
  83         KMessage message(BPrivate::B_REG_DELETE_USER);
  84         if (message.AddString("name", user) != B_OK) {
  85                 fprintf(stderr, "Error: Out of memory!\n");
  86                 exit(1);
  87         }
  88
  89         // send the request
  90         KMessage reply;
  91         status_t error = send_authentication_request_to_registrar(message, reply);
  92         if (error != B_OK) {
  93                 fprintf(stderr, "Error: Failed to delete user: %s\n", strerror(error));
  94                 exit(1);
  95         }
  96
  97         return 0;
  98 }