Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/imap/main.c @ 4165:773c4becceae HEAD

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Added shutdown_clients setting to control if existing imap/pop3 processes should be killed when master is.
author Timo Sirainen <tss@iki.fi>
date Wed, 12 Apr 2006 14:42:57 +0300
parents b10fa8ba01ca
children 32b5045f8d80
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* Copyright (C) 2002-2003 Timo Sirainen */
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2
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3 #include "common.h"
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4 #include "ioloop.h"
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5 #include "network.h"
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6 #include "ostream.h"
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7 #include "str.h"
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8 #include "lib-signals.h"
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9 #include "restrict-access.h"
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10 #include "fd-close-on-exec.h"
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11 #include "process-title.h"
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12 #include "randgen.h"
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13 #include "module-dir.h"
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14 #include "dict-client.h"
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15 #include "mail-storage.h"
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16 #include "commands.h"
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17 #include "namespace.h"
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18
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19 #include <stdio.h>
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20 #include <stdlib.h>
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21 #include <unistd.h>
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22 #include <syslog.h>
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23
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24 #define IS_STANDALONE() \
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25 (getenv("LOGGED_IN") == NULL && getenv("IMAPLOGINTAG") == NULL)
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27 struct client_workaround_list {
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28 const char *name;
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29 enum client_workarounds num;
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30 };
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31
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32 struct client_workaround_list client_workaround_list[] = {
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33 { "delay-newmail", WORKAROUND_DELAY_NEWMAIL },
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34 { "outlook-idle", WORKAROUND_OUTLOOK_IDLE },
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35 { "netscape-eoh", WORKAROUND_NETSCAPE_EOH },
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36 { "tb-extra-mailbox-sep", WORKAROUND_TB_EXTRA_MAILBOX_SEP },
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37 { NULL, 0 }
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38 };
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39
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40 struct ioloop *ioloop;
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41 unsigned int max_keyword_length;
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42 unsigned int imap_max_line_length;
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43 enum client_workarounds client_workarounds = 0;
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44 static struct io *log_io = NULL;
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45
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46 static struct module *modules;
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47 static char log_prefix[128]; /* syslog() needs this to be permanent */
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48 static pool_t namespace_pool;
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49
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50 void (*hook_mail_storage_created)(struct mail_storage *storage) = NULL;
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51 void (*hook_client_created)(struct client **client) = NULL;
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52
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53 string_t *capability_string;
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54
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55 static void sig_die(int signo, void *context __attr_unused__)
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56 {
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57 /* warn about being killed because of some signal, except SIGINT (^C)
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58 which is too common at least while testing :) */
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59 if (signo != SIGINT)
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60 i_warning("Killed with signal %d", signo);
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61 io_loop_stop(ioloop);
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62 }
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63
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64 static void log_error_callback(void *context __attr_unused__)
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65 {
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66 io_loop_stop(ioloop);
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67 }
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68
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69 static void parse_workarounds(void)
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70 {
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71 struct client_workaround_list *list;
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72 const char *env, *const *str;
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73
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74 env = getenv("IMAP_CLIENT_WORKAROUNDS");
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75 if (env == NULL)
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76 return;
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77
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78 for (str = t_strsplit_spaces(env, " ,"); *str != NULL; str++) {
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79 list = client_workaround_list;
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80 for (; list->name != NULL; list++) {
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81 if (strcasecmp(*str, list->name) == 0) {
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82 client_workarounds |= list->num;
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83 break;
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84 }
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85 }
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86 if (list->name == NULL)
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87 i_fatal("Unknown client workaround: %s", *str);
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88 }
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89 }
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90
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91 static void open_logfile(void)
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92 {
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93 const char *user;
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94
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95 if (getenv("LOG_TO_MASTER") != NULL) {
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96 i_set_failure_internal();
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97 return;
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98 }
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99
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100 user = getenv("USER");
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101 if (user == NULL) {
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102 if (IS_STANDALONE())
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103 user = getlogin();
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104 if (user == NULL)
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105 user = "??";
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106 }
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107 if (strlen(user) >= sizeof(log_prefix)-6) {
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108 /* quite a long user name, cut it */
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109 user = t_strndup(user, sizeof(log_prefix)-6-2);
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110 user = t_strconcat(user, "..", NULL);
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111 }
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112 i_snprintf(log_prefix, sizeof(log_prefix), "imap(%s)", user);
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113
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114 if (getenv("USE_SYSLOG") != NULL) {
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115 const char *env = getenv("SYSLOG_FACILITY");
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116 i_set_failure_syslog(log_prefix, LOG_NDELAY,
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117 env == NULL ? LOG_MAIL : atoi(env));
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118 } else {
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119 /* log to file or stderr */
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120 i_set_failure_file(getenv("LOGFILE"), log_prefix);
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121 }
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122
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123 if (getenv("INFOLOGFILE") != NULL)
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124 i_set_info_file(getenv("INFOLOGFILE"));
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125
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126 i_set_failure_timestamp_format(getenv("LOGSTAMP"));
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127 }
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128
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129 static void drop_privileges(void)
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130 {
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131 /* Log file or syslog opening probably requires roots */
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132 open_logfile();
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133
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134 /* Most likely needed. Have to open /dev/urandom before possible
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135 chrooting. */
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136 random_init();
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137
801
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138 restrict_access_by_env(!IS_STANDALONE());
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139 }
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140
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141 static void main_init(void)
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142 {
903
fd8888f6f037 Naming style changes, finally got tired of most of the typedefs. Also the
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143 struct client *client;
1654
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144 const char *user, *str;
550
3a83b05a0be3 --with-rawlog: Build support for logging traffic of user sessions. If
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145
3620
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146 lib_signals_init();
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147 lib_signals_set_handler(SIGINT, TRUE, sig_die, NULL);
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148 lib_signals_set_handler(SIGTERM, TRUE, sig_die, NULL);
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149 lib_signals_set_handler(SIGPIPE, FALSE, NULL, NULL);
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150 lib_signals_set_handler(SIGALRM, FALSE, NULL, NULL);
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151
1193
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152 user = getenv("USER");
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153 if (user == NULL) {
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154 if (IS_STANDALONE())
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155 user = getlogin();
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156 if (user == NULL)
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157 i_fatal("USER environment missing");
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158 }
748
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159
3034
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160 if (getenv("DEBUG") != NULL) {
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161 i_info("Effective uid=%s, gid=%s",
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162 dec2str(geteuid()), dec2str(getegid()));
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163 }
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164
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165 if (getenv("STDERR_CLOSE_SHUTDOWN") != NULL) {
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166 /* If master dies, the log fd gets closed and we'll quit */
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167 log_io = io_add(STDERR_FILENO, IO_ERROR,
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168 log_error_callback, NULL);
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169 }
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170
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171 capability_string = str_new(default_pool, sizeof(CAPABILITY_STRING)+32);
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172 str_append(capability_string, CAPABILITY_STRING);
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173
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174 dict_client_register();
1138
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175 mail_storage_init();
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176 mail_storage_register_all();
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177 clients_init();
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178 commands_init();
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179
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180 if (getenv("MODULE_LIST") == NULL)
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181 modules = NULL;
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182 else {
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183 if (getenv("MODULE_DIR") == NULL)
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184 i_fatal("MODULE_LIST given but MODULE_DIR was not");
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185 modules = module_dir_load(getenv("MODULE_DIR"),
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186 getenv("MODULE_LIST"), TRUE);
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187 }
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188
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189 str = getenv("IMAP_MAX_LINE_LENGTH");
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190 imap_max_line_length = str != NULL ?
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191 (unsigned int)strtoul(str, NULL, 10) :
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192 DEFAULT_IMAP_MAX_LINE_LENGTH;
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diff changeset
193
1959
50e24ce4f9c3 and a few more custom flag -> keyword changes
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194 str = getenv("MAIL_MAX_KEYWORD_LENGTH");
1958
4dec6a3d79fd s/custom flags/keywords/
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diff changeset
195 max_keyword_length = str != NULL ?
1168
03f1455664d7 Added setting to limit length of custom flag names.
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diff changeset
196 (unsigned int)strtoul(str, NULL, 10) :
1958
4dec6a3d79fd s/custom flags/keywords/
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diff changeset
197 DEFAULT_MAX_KEYWORD_LENGTH;
1168
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diff changeset
198
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1c1ed4494aa4 Split client_workarounds to imap_ and pop3_ ones. Added outlook-no-nuls POP3
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diff changeset
199 parse_workarounds();
1c1ed4494aa4 Split client_workarounds to imap_ and pop3_ ones. Added outlook-no-nuls POP3
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diff changeset
200
1654
31c4bb26a1e9 Getting ready for namespaces. LIST is still broken with them.
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diff changeset
201 namespace_pool = pool_alloconly_create("namespaces", 1024);
1694
0fae24674a9a Separated rawlog into it's own binary.
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202 client = client_create(0, 1, namespace_init(namespace_pool, user));
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203
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diff changeset
204 o_stream_cork(client->output);
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diff changeset
205 if (IS_STANDALONE()) {
620
d34ee528aa68 Send PREAUTH if we were started without LOGIN_TAG environment (ie. not
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diff changeset
206 client_send_line(client, t_strconcat(
4015
4aeb58dc4f18 PREAUTH banner should show the capability from capability_string in case
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diff changeset
207 "* PREAUTH [CAPABILITY ",
4aeb58dc4f18 PREAUTH banner should show the capability from capability_string in case
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diff changeset
208 str_c(capability_string), "] "
1193
206190c8c66f Use getlogin() alternatively if USER environment isn't found.
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diff changeset
209 "Logged in as ", user, NULL));
1316
02dc0b35af64 Support for mailfront.
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diff changeset
210 } else if (getenv("IMAPLOGINTAG") != NULL) {
02dc0b35af64 Support for mailfront.
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diff changeset
211 /* Support for mailfront */
02dc0b35af64 Support for mailfront.
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diff changeset
212 client_send_line(client, t_strconcat(getenv("IMAPLOGINTAG"),
02dc0b35af64 Support for mailfront.
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diff changeset
213 " OK Logged in.", NULL));
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214 }
2421
d141e1bfdd63 We never do blocking reads/writes to network anymore. Changed imap and pop3
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diff changeset
215 o_stream_uncork(client->output);
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216 }
3b1985cbc908 Initial revision
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217
3b1985cbc908 Initial revision
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diff changeset
218 static void main_deinit(void)
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219 {
4149
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diff changeset
220 if (log_io != NULL)
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diff changeset
221 io_remove(&log_io);
3879
928229f8b3e6 deinit, unref, destroy, close, free, etc. functions now take a pointer to
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diff changeset
222 module_dir_unload(&modules);
1465
03dd87873a81 Added support for dynamically loadable imap/pop3 modules.
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diff changeset
223
03dd87873a81 Added support for dynamically loadable imap/pop3 modules.
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diff changeset
224 commands_deinit();
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225 clients_deinit();
1351
6709d9330885 minor memory leak/cleanup fixes
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diff changeset
226 mail_storage_deinit();
3789
0120998fb2d9 Register proxy dictionary support and link libdict. Currently it's used only
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diff changeset
227 dict_client_unregister();
1597
9f503b7851ab Moved all dotlocking code to lib/. Also we now use temp file + link() rather
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parents: 1591
diff changeset
228 random_deinit();
1654
31c4bb26a1e9 Getting ready for namespaces. LIST is still broken with them.
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diff changeset
229 pool_unref(namespace_pool);
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diff changeset
230
3879
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diff changeset
231 str_free(&capability_string);
1967
b6d900688c55 memory leak fixes
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parents: 1959
diff changeset
232
3620
3360cc019737 Implemented new signal handling framework, which makes handling signals much
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diff changeset
233 lib_signals_deinit();
0
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234 closelog();
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diff changeset
235 }
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236
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diff changeset
237 int main(int argc __attr_unused__, char *argv[], char *envp[])
0
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238 {
727
8dd8ebe6bcac We use close-on-exec flag now to make sure that master process closes the
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parents: 621
diff changeset
239 #ifdef DEBUG
2235
dcff4c088f1a DEBUG: If GDB environment is set, don't do fd leak checks.
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parents: 2084
diff changeset
240 if (getenv("LOGGED_IN") != NULL && getenv("GDB") == NULL)
738
1b0205fc4153 DEBUG: We shouldn't verify the fds when running in pre-auth mode (breaks
Timo Sirainen <tss@iki.fi>
parents: 727
diff changeset
241 fd_debug_verify_leaks(3, 1024);
727
8dd8ebe6bcac We use close-on-exec flag now to make sure that master process closes the
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diff changeset
242 #endif
2873
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
243 if (IS_STANDALONE() && getuid() == 0 &&
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
244 net_getpeername(1, NULL, NULL) == 0) {
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
245 printf("* BAD [ALERT] imap binary must not be started from "
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
246 "inetd, use imap-login instead.\n");
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
247 return 1;
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
248 }
72f28a4b964d Make sure imap or pop3 processes cannot be started from inetd.
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diff changeset
249
0
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diff changeset
250 /* NOTE: we start rooted, so keep the code minimal until
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diff changeset
251 restrict_access_by_env() is called */
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diff changeset
252 lib_init();
801
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
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diff changeset
253 drop_privileges();
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
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diff changeset
254
746
ad4292a30b1d Set process title for rawlog process.
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parents: 738
diff changeset
255 process_title_init(argv, envp);
389
60040a9d243f ioloop_create() takes now pool-parameter. io_buffer_create_mmaped() takes
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parents: 35
diff changeset
256 ioloop = io_loop_create(system_pool);
0
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diff changeset
257
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diff changeset
258 main_init();
0
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diff changeset
259 io_loop_run(ioloop);
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diff changeset
260 main_deinit();
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diff changeset
261
3879
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diff changeset
262 io_loop_destroy(&ioloop);
0
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diff changeset
263 lib_deinit();
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diff changeset
264
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265 return 0;
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266 }