Mercurial > dovecot > core-2.2

annotate src/pop3/main.c @ 10101:4fe8c4382712 HEAD

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Redesigned how login process passes connections to mail processes and changed related APIs. Master process is no longer in the middle.
author Timo Sirainen <tss@iki.fi>
date Mon, 19 Oct 2009 21:42:09 -0400
parents 4b28edba5ff9
children 1e63221f5c83
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b9faf4db2a9f Updated copyright notices to include year 2009.
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1 /* Copyright (c) 2002-2009 Dovecot authors, see the included COPYING file */
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2
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3 #include "pop3-common.h"
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4 #include "ioloop.h"
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5 #include "buffer.h"
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6 #include "istream.h"
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7 #include "ostream.h"
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8 #include "base64.h"
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9 #include "restrict-access.h"
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10 #include "process-title.h"
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11 #include "master-service.h"
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12 #include "master-login.h"
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13 #include "master-interface.h"
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14 #include "var-expand.h"
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15 #include "mail-storage-service.h"
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16
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17 #include <stdio.h>
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18 #include <stdlib.h>
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19 #include <unistd.h>
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21 #define IS_STANDALONE() \
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22 (getenv(MASTER_UID_ENV) == NULL)
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23
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24 static const struct setting_parser_info *set_roots[] = {
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25 &pop3_setting_parser_info,
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26 NULL
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27 };
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28 static struct master_login *master_login = NULL;
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29 static enum mail_storage_service_flags storage_service_flags = 0;
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30 static bool user_initialized = FALSE;
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31
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32 void (*hook_client_created)(struct client **client) = NULL;
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33
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34 static void client_add_input(struct client *client, const buffer_t *buf)
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35 {
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36 struct ostream *output;
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37
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38 if (buf != NULL && buf->used > 0) {
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39 if (!i_stream_add_data(client->input, buf->data, buf->used))
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40 i_panic("Couldn't add client input to stream");
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41 }
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42
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43 output = client->output;
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44 o_stream_ref(output);
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45 o_stream_cork(output);
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46 if (!IS_STANDALONE())
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47 client_send_line(client, "+OK Logged in.");
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48 (void)client_handle_input(client);
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49 o_stream_uncork(output);
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50 o_stream_unref(&output);
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51 }
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52
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53 static void
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54 main_stdio_init_user(const struct pop3_settings *set, struct mail_user *user)
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55 {
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56 struct client *client;
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57 buffer_t *input_buf;
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58 const char *input_base64;
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59
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60 input_base64 = getenv("CLIENT_INPUT");
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61 input_buf = input_base64 == NULL ? NULL :
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62 t_base64_decode_str(input_base64);
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63
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64 client = client_create(STDIN_FILENO, STDOUT_FILENO, user, set);
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65 client_add_input(client, input_buf);
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66 }
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67
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68 static void main_stdio_run(void)
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69 {
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70 struct mail_storage_service_input input;
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71 struct mail_user *mail_user;
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72 const struct pop3_settings *set;
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73 const char *value;
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74
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75 memset(&input, 0, sizeof(input));
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76 input.module = input.service = "pop3";
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77 input.username = getenv("USER");
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78 if (input.username == NULL && IS_STANDALONE())
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79 input.username = getlogin();
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80 if (input.username == NULL)
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81 i_fatal("USER environment missing");
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82 if ((value = getenv("IP")) != NULL)
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83 net_addr2ip(value, &input.remote_ip);
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84 if ((value = getenv("LOCAL_IP")) != NULL)
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85 net_addr2ip(value, &input.local_ip);
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86
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87 user_initialized = TRUE;
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88 mail_user = mail_storage_service_init_user(master_service,
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89 &input, set_roots,
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90 storage_service_flags);
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91 set = mail_storage_service_get_settings(master_service);
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92 restrict_access_allow_coredumps(TRUE);
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93 if (set->shutdown_clients)
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94 master_service_set_die_with_master(master_service, TRUE);
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95
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96 /* fake that we're running, so we know if client was destroyed
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97 while handling its initial input */
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98 io_loop_set_running(current_ioloop);
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99 main_stdio_init_user(set, mail_user);
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100 }
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101
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102 static void
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103 login_client_connected(const struct master_login_client *client,
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104 const char *username, const char *const *extra_fields)
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105 {
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106 struct mail_storage_service_input input;
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107 struct mail_user *mail_user;
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108 struct client *pop3_client;
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109 const struct pop3_settings *set;
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110 buffer_t input_buf;
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111
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112 if (pop3_clients != NULL) {
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113 i_error("Can't handle more than one connection currently");
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114 (void)close(client->fd);
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115 return;
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116 }
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117 i_assert(!user_initialized);
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118
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119 memset(&input, 0, sizeof(input));
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120 input.module = input.service = "pop3";
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121 input.local_ip = client->auth_req.local_ip;
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122 input.remote_ip = client->auth_req.remote_ip;
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123 input.username = username;
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124 input.userdb_fields = extra_fields;
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125
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126 if (input.username == NULL) {
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127 i_error("login client: Username missing from auth reply");
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128 (void)close(client->fd);
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129 return;
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130 }
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131 user_initialized = TRUE;
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132 master_login_deinit(&master_login);
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133
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134 mail_user = mail_storage_service_init_user(master_service,
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135 &input, set_roots,
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136 storage_service_flags);
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137 set = mail_storage_service_get_settings(master_service);
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138 restrict_access_allow_coredumps(TRUE);
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139 if (set->shutdown_clients)
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140 master_service_set_die_with_master(master_service, TRUE);
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141
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142 /* fake that we're running, so we know if client was destroyed
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143 while handling its initial input */
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144 io_loop_set_running(current_ioloop);
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145
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146 buffer_create_const_data(&input_buf, client->data,
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147 client->auth_req.data_size);
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148 pop3_client = client_create(client->fd, client->fd, mail_user, set);
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149 T_BEGIN {
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150 client_add_input(pop3_client, &input_buf);
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151 } T_END;
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152 }
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153
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154 static void client_connected(const struct master_service_connection *conn)
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155 {
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156 if (master_login == NULL) {
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157 /* running standalone, we shouldn't even get here */
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158 (void)close(conn->fd);
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159 } else {
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160 master_login_add(master_login, conn->fd);
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161 }
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162 }
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163
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164 int main(int argc, char *argv[], char *envp[])
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165 {
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166 enum master_service_flags service_flags = 0;
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167 int c;
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168
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169 if (IS_STANDALONE() && getuid() == 0 &&
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170 net_getpeername(1, NULL, NULL) == 0) {
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171 printf("-ERR pop3 binary must not be started from "
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172 "inetd, use pop3-login instead.\n");
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173 return 1;
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174 }
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175
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176 if (IS_STANDALONE()) {
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177 service_flags |= MASTER_SERVICE_FLAG_STANDALONE |
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178 MASTER_SERVICE_FLAG_STD_CLIENT;
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179 } else {
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180 storage_service_flags |=
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181 MAIL_STORAGE_SERVICE_FLAG_DISALLOW_ROOT;
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182 }
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183
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184 master_service = master_service_init("pop3", service_flags, argc, argv);
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185 while ((c = getopt(argc, argv, master_service_getopt_string())) > 0) {
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186 if (!master_service_parse_option(master_service, c, optarg))
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187 exit(FATAL_DEFAULT);
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188 }
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189 process_title_init(argv, envp);
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190 master_service_init_finish(master_service);
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191
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192 if (IS_STANDALONE()) {
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193 T_BEGIN {
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194 main_stdio_run();
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195 } T_END;
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196 } else {
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197 master_login = master_login_init("auth-master",
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198 login_client_connected);
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199 io_loop_set_running(current_ioloop);
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200 }
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201
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202 if (io_loop_is_running(current_ioloop))
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203 master_service_run(master_service, client_connected);
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204 clients_destroy_all();
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205
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206 if (master_login != NULL)
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207 master_login_deinit(&master_login);
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208 if (user_initialized)
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209 mail_storage_service_deinit_user();
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210 master_service_deinit(&master_service);
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211 return 0;
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212 }