Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/lib-storage/index/shared/shared-storage.c @ 8375:4aafdbe62680 HEAD

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shared mailboxes: Cleanups, fixes and optimizations.
author Timo Sirainen <tss@iki.fi>
date Sat, 01 Nov 2008 16:05:19 +0200
parents 469fc16380da
children 118e07fdfe11
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rev   line source
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1 /* Copyright (c) 2008 Dovecot authors, see the included COPYING file */
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2
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3 #include "lib.h"
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4 #include "array.h"
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5 #include "str.h"
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6 #include "ioloop.h"
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7 #include "auth-master.h"
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8 #include "var-expand.h"
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9 #include "shared-storage.h"
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10
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11 #include <stdlib.h>
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12 #include <ctype.h>
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13
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14 #define SHARED_LIST_CONTEXT(obj) \
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15 MODULE_CONTEXT(obj, shared_mailbox_list_module)
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16
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17 extern struct mail_storage shared_storage;
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18 extern struct mailbox shared_mailbox;
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19
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20 static MODULE_CONTEXT_DEFINE_INIT(shared_mailbox_list_module,
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21 &mailbox_list_module_register);
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22
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23 static struct mail_storage *shared_alloc(void)
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24 {
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25 struct shared_storage *storage;
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26 pool_t pool;
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27
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28 pool = pool_alloconly_create("shared storage", 256);
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29 storage = p_new(pool, struct shared_storage, 1);
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30 storage->storage = shared_storage;
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31 storage->storage.pool = pool;
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32 storage->storage.storage_class = &shared_storage;
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33
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34 storage->base_dir = p_strdup(pool, getenv("BASE_DIR"));
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35 if (storage->base_dir == NULL)
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36 storage->base_dir = PKG_RUNDIR;
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37
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38 return &storage->storage;
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39 }
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40
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41 static int shared_create(struct mail_storage *_storage, const char *data,
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42 const char **error_r)
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43 {
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44 struct shared_storage *storage = (struct shared_storage *)_storage;
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45 struct mailbox_list_settings list_set;
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46 const char *driver, *p;
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47 bool have_username;
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48
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49 /* data must begin with the actual mailbox driver */
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50 p = strchr(data, ':');
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51 if (p == NULL) {
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52 *error_r = "Shared mailbox location not prefixed with driver";
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53 return -1;
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54 }
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55 driver = t_strdup_until(data, p);
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56 storage->location = p_strdup(_storage->pool, data);
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57 storage->storage_class = mail_storage_find_class(driver);
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58 if (storage->storage_class == NULL) {
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59 *error_r = t_strconcat("Unknown shared storage driver: ",
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60 driver, NULL);
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61 return -1;
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62 }
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63 _storage->mailbox_is_file = storage->storage_class->mailbox_is_file;
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64
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65 p = strchr(_storage->ns->prefix, '%');
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66 if (p == NULL) {
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67 *error_r = "Shared namespace prefix doesn't contain %";
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68 return -1;
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69 }
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70 storage->ns_prefix_pattern = p_strdup(_storage->pool, p);
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71 _storage->ns->prefix = p_strdup_until(_storage->ns->user->pool,
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72 _storage->ns->prefix, p);
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73
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74 have_username = FALSE;
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75 for (p = storage->ns_prefix_pattern; *p != '\0'; p++) {
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76 if (*p != '%')
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77 continue;
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78 if (*++p == '\0')
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79 break;
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80 if (*p == 'u' || *p == 'n')
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81 have_username = TRUE;
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82 else if (*p != 'd')
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83 break;
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84 }
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85 if (*p != '\0') {
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86 *error_r = "Shared namespace prefix contains unknown variables";
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87 return -1;
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88 }
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89 if (!have_username) {
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90 *error_r = "Shared namespace prefix doesn't contain %u or %n";
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91 return -1;
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92 }
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93
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94 if (mailbox_list_alloc("shared", &_storage->list, error_r) < 0)
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95 return -1;
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96 MODULE_CONTEXT_SET_FULL(_storage->list, shared_mailbox_list_module,
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97 storage, &storage->list_module_ctx);
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98
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99 memset(&list_set, 0, sizeof(list_set));
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100 list_set.mail_storage_flags = &_storage->flags;
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101 list_set.lock_method = &_storage->lock_method;
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102 mailbox_list_init(_storage->list, _storage->ns, &list_set,
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103 mail_storage_get_list_flags(_storage->flags));
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104 return 0;
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105 }
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106
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107 static void shared_storage_destroy(struct mail_storage *_storage)
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108 {
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109 struct shared_storage *storage = (struct shared_storage *)_storage;
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110
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111 if (storage->auth_master_conn != NULL)
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112 auth_master_deinit(&storage->auth_master_conn);
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113 index_storage_destroy(_storage);
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114 }
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115
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116 static void shared_storage_auth_master_init(struct shared_storage *storage)
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117 {
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118 const char *auth_socket_path;
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119 bool debug;
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120
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121 auth_socket_path = getenv("AUTH_SOCKET_PATH");
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122 if (auth_socket_path == NULL) {
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123 auth_socket_path = t_strconcat(storage->base_dir,
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124 "/auth-master", NULL);
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125 }
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126
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127 debug = (storage->storage.flags & MAIL_STORAGE_FLAG_DEBUG) != 0;
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128 storage->auth_master_conn = auth_master_init(auth_socket_path, debug);
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129 }
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130
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131 static int
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132 shared_storage_lookup_home(struct shared_storage *storage,
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133 const char *user, const char **home_r)
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134 {
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135 struct auth_user_reply reply;
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136 pool_t userdb_pool;
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diff changeset
137 int ret;
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138
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139 if (storage->auth_master_conn == NULL)
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140 shared_storage_auth_master_init(storage);
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141
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142 userdb_pool = pool_alloconly_create("userdb lookup", 512);
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143 ret = auth_master_user_lookup(storage->auth_master_conn, user,
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144 AUTH_SERVICE_INTERNAL,
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diff changeset
145 userdb_pool, &reply);
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diff changeset
146 if (ret > 0)
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147 *home_r = t_strdup(reply.home);
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148 pool_unref(&userdb_pool);
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149 return ret;
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150 }
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151
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152 static void get_nonexisting_user_location(struct shared_storage *storage,
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153 string_t *location)
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154 {
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diff changeset
155 /* user wasn't found. we'll still need to create the storage
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156 to avoid exposing which users exist and which don't. */
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157 str_append(location, storage->storage_class->name);
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158 str_append_c(location, ':');
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159
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160 /* use a reachable but non-existing path as the mail root directory */
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161 str_append(location, storage->base_dir);
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162 str_append(location, PKG_RUNDIR"/user-not-found");
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163 }
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164
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165 int shared_storage_get_namespace(struct mail_storage *_storage,
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166 const char **_name,
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167 struct mail_namespace **ns_r)
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168 {
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169 struct shared_storage *storage = (struct shared_storage *)_storage;
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170 struct mail_user *user = _storage->ns->user;
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171 static struct var_expand_table static_tab[] = {
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172 { 'u', NULL },
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173 { 'n', NULL },
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174 { 'd', NULL },
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175 { 'h', NULL },
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176 { '\0', NULL }
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177 };
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178 struct var_expand_table *tab;
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179 struct mail_namespace *ns;
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180 const char *domain = NULL, *username = NULL, *userdomain = NULL;
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181 const char *name, *p, *next, **dest, *error;
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182 string_t *prefix, *location;
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diff changeset
183 int ret;
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184
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185 *ns_r = NULL;
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186
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187 p = storage->ns_prefix_pattern;
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188 for (name = *_name; *p != '\0';) {
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189 if (*p != '%') {
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190 if (*p != *name)
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191 return -1;
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192 p++; name++;
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193 continue;
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194 }
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195 switch (*++p) {
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196 case 'd':
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197 dest = &domain;
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198 break;
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199 case 'n':
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200 dest = &username;
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201 break;
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202 case 'u':
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203 dest = &userdomain;
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204 break;
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diff changeset
205 default:
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206 /* we checked this already above */
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diff changeset
207 i_unreached();
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208 }
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209 p++;
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diff changeset
210
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211 next = strchr(name, *p != '\0' ? *p : _storage->ns->sep);
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diff changeset
212 if (next == NULL)
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213 return -1;
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diff changeset
214
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215 *dest = t_strdup_until(name, next);
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diff changeset
216 name = next;
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217 }
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diff changeset
218 /* successfully matched the name. */
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diff changeset
219 if (userdomain == NULL) {
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diff changeset
220 i_assert(username != NULL);
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diff changeset
221 userdomain = domain == NULL ? username :
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diff changeset
222 t_strconcat(username, "@", domain, NULL);
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diff changeset
223 } else {
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224 domain = strchr(userdomain, '@');
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diff changeset
225 if (domain == NULL)
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diff changeset
226 username = userdomain;
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diff changeset
227 else {
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diff changeset
228 username = t_strdup_until(userdomain, domain);
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diff changeset
229 domain++;
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230 }
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diff changeset
231 }
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
232
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diff changeset
233 /* expand the namespace prefix and see if it already exists.
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
234 this should normally happen only when the mailbox is being opened */
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parents:
diff changeset
235 tab = t_malloc(sizeof(static_tab));
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parents:
diff changeset
236 memcpy(tab, static_tab, sizeof(static_tab));
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diff changeset
237 tab[0].value = userdomain;
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
238 tab[1].value = username;
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Timo Sirainen <tss@iki.fi>
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diff changeset
239 tab[2].value = domain;
8375
4aafdbe62680 shared mailboxes: Cleanups, fixes and optimizations.
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diff changeset
240
8173
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diff changeset
241 prefix = t_str_new(128);
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Timo Sirainen <tss@iki.fi>
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diff changeset
242 str_append(prefix, _storage->ns->prefix);
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
243 var_expand(prefix, storage->ns_prefix_pattern, tab);
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diff changeset
244
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diff changeset
245 ns = mail_namespace_find_prefix(user->namespaces, str_c(prefix));
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parents:
diff changeset
246 if (ns != NULL) {
8254
c465b10a76fd Shared mailboxes: First mailbox access failed if virtual separator didn't match real separator.
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parents: 8173
diff changeset
247 *_name = mail_namespace_fix_sep(ns, name);
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diff changeset
248 *ns_r = ns;
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diff changeset
249 return 0;
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diff changeset
250 }
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diff changeset
251
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diff changeset
252 if (!var_has_key(storage->location, 'h'))
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diff changeset
253 ret = 1;
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diff changeset
254 else {
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diff changeset
255 /* we'll need to look up the user's home directory */
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diff changeset
256 ret = shared_storage_lookup_home(storage, userdomain,
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diff changeset
257 &tab[3].value);
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diff changeset
258 if (ret < 0) {
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diff changeset
259 mail_storage_set_critical(_storage, "Namespace '%s': "
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diff changeset
260 "Could not lookup home for user %s",
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diff changeset
261 _storage->ns->prefix, userdomain);
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diff changeset
262 return -1;
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diff changeset
263 }
4aafdbe62680 shared mailboxes: Cleanups, fixes and optimizations.
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diff changeset
264 }
4aafdbe62680 shared mailboxes: Cleanups, fixes and optimizations.
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diff changeset
265
8173
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diff changeset
266 /* create the new namespace */
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parents:
diff changeset
267 ns = p_new(user->pool, struct mail_namespace, 1);
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parents:
diff changeset
268 ns->type = NAMESPACE_SHARED;
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Timo Sirainen <tss@iki.fi>
parents:
diff changeset
269 ns->user = user;
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parents:
diff changeset
270 ns->prefix = p_strdup(user->pool, str_c(prefix));
8291
4296aa3fbb75 Subscription handling fixes for subscriptions=no namespaces and shared mailboxes.
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parents: 8254
diff changeset
271 ns->flags = NAMESPACE_FLAG_LIST | NAMESPACE_FLAG_HIDDEN |
4296aa3fbb75 Subscription handling fixes for subscriptions=no namespaces and shared mailboxes.
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diff changeset
272 NAMESPACE_FLAG_AUTOCREATED;
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c465b10a76fd Shared mailboxes: First mailbox access failed if virtual separator didn't match real separator.
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diff changeset
273 ns->sep = _storage->ns->sep;
8173
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diff changeset
274
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diff changeset
275 location = t_str_new(256);
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276 if (ret > 0)
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277 var_expand(location, storage->location, tab);
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278 else
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279 get_nonexisting_user_location(storage, location);
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280 if (mail_storage_create(ns, NULL, str_c(location), _storage->flags,
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281 _storage->lock_method, &error) < 0) {
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282 mail_storage_set_critical(_storage, "Namespace '%s': %s",
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283 ns->prefix, error);
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284 return -1;
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285 }
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286 /* FIXME: we could remove namespaces here that don't have usable
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287 mailboxes. otherwise the memory usage could just keep growing. */
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288 mail_user_add_namespace(user, ns);
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289
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290 *_name = mail_namespace_fix_sep(ns, name);
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291 *ns_r = ns;
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292 return 0;
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293 }
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294
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295 static void shared_mailbox_copy_error(struct mail_storage *shared_storage,
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296 struct mail_namespace *backend_ns)
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297 {
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298 const char *str;
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299 enum mail_error error;
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300
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301 str = mail_storage_get_last_error(backend_ns->storage, &error);
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302 mail_storage_set_error(shared_storage, error, str);
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303 }
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304
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305 static struct mailbox *
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306 shared_mailbox_open(struct mail_storage *storage, const char *name,
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307 struct istream *input, enum mailbox_open_flags flags)
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308 {
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309 struct mail_namespace *ns;
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310 struct mailbox *box;
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311
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312 if (input != NULL) {
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313 mail_storage_set_critical(storage,
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314 "Shared storage doesn't support streamed mailboxes");
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315 return NULL;
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316 }
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317
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318 if (shared_storage_get_namespace(storage, &name, &ns) < 0)
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319 return NULL;
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320
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321 /* if we call the normal mailbox_open() here the plugins will see
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322 mailbox_open() called twice and they could break. */
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323 box = ns->storage->storage_class->v.
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324 mailbox_open(ns->storage, name, NULL, flags);
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325 if (box == NULL)
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326 shared_mailbox_copy_error(storage, ns);
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327 return box;
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328 }
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329
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330 static int shared_mailbox_create(struct mail_storage *storage,
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331 const char *name, bool directory)
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332 {
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333 struct mail_namespace *ns;
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334 int ret;
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335
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336 if (shared_storage_get_namespace(storage, &name, &ns) < 0)
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337 return -1;
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338
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339 ret = mail_storage_mailbox_create(ns->storage, name, directory);
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340 if (ret < 0)
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341 shared_mailbox_copy_error(storage, ns);
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342 return ret;
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343 }
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344
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345 struct mail_storage shared_storage = {
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346 MEMBER(name) SHARED_STORAGE_NAME,
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347 MEMBER(mailbox_is_file) FALSE, /* unknown at this point */
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348
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349 {
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350 NULL,
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351 NULL,
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352 shared_alloc,
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353 shared_create,
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354 shared_storage_destroy,
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355 NULL,
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356 shared_mailbox_open,
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357 shared_mailbox_create
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358 }
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359 };