Mercurial > dovecot > original-hg > dovecot-1.2

annotate src/imap/main.c @ 4553:d1c0514754d5 HEAD

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
Require that master's version number matches the child's, unless version_ignore=yes. Usually it's an accidental installation problem if the version numbers don't match.
author Timo Sirainen <tss@iki.fi>
date Thu, 10 Aug 2006 21:46:53 +0300
parents e661182eab75
children 93bc9770f938
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 #include "imap-thread.h"
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19
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20 #include <stdio.h>
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21 #include <stdlib.h>
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22 #include <unistd.h>
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23 #include <syslog.h>
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24
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25 #define IS_STANDALONE() \
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26 (getenv("LOGGED_IN") == NULL && getenv("IMAPLOGINTAG") == NULL)
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28 struct client_workaround_list {
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29 const char *name;
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30 enum client_workarounds num;
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31 };
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32
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33 struct client_workaround_list client_workaround_list[] = {
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34 { "delay-newmail", WORKAROUND_DELAY_NEWMAIL },
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35 { "outlook-idle", WORKAROUND_OUTLOOK_IDLE },
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36 { "netscape-eoh", WORKAROUND_NETSCAPE_EOH },
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37 { "tb-extra-mailbox-sep", WORKAROUND_TB_EXTRA_MAILBOX_SEP },
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38 { NULL, 0 }
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39 };
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40
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41 struct ioloop *ioloop;
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42 unsigned int max_keyword_length;
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43 unsigned int imap_max_line_length;
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44 enum client_workarounds client_workarounds = 0;
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45 static struct io *log_io = NULL;
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46
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47 static struct module *modules;
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48 static char log_prefix[128]; /* syslog() needs this to be permanent */
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49 static pool_t namespace_pool;
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50
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51 void (*hook_mail_storage_created)(struct mail_storage *storage) = NULL;
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52 void (*hook_client_created)(struct client **client) = NULL;
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53
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54 string_t *capability_string;
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55
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56 static void sig_die(int signo, void *context __attr_unused__)
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57 {
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58 /* warn about being killed because of some signal, except SIGINT (^C)
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59 which is too common at least while testing :) */
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60 if (signo != SIGINT)
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61 i_warning("Killed with signal %d", signo);
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62 io_loop_stop(ioloop);
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63 }
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64
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65 static void log_error_callback(void *context __attr_unused__)
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66 {
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67 io_loop_stop(ioloop);
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68 }
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69
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70 static void parse_workarounds(void)
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71 {
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72 struct client_workaround_list *list;
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73 const char *env, *const *str;
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74
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75 env = getenv("IMAP_CLIENT_WORKAROUNDS");
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76 if (env == NULL)
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77 return;
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78
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79 for (str = t_strsplit_spaces(env, " ,"); *str != NULL; str++) {
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80 list = client_workaround_list;
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81 for (; list->name != NULL; list++) {
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82 if (strcasecmp(*str, list->name) == 0) {
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83 client_workarounds |= list->num;
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84 break;
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85 }
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86 }
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87 if (list->name == NULL)
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88 i_fatal("Unknown client workaround: %s", *str);
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89 }
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90 }
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91
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92 static void open_logfile(void)
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93 {
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94 const char *user;
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95
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96 if (getenv("LOG_TO_MASTER") != NULL) {
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97 i_set_failure_internal();
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98 return;
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99 }
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100
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101 user = getenv("USER");
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102 if (user == NULL) {
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103 if (IS_STANDALONE())
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104 user = getlogin();
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105 if (user == NULL)
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106 user = "??";
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107 }
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108 if (strlen(user) >= sizeof(log_prefix)-6) {
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109 /* quite a long user name, cut it */
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110 user = t_strndup(user, sizeof(log_prefix)-6-2);
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111 user = t_strconcat(user, "..", NULL);
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112 }
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113 i_snprintf(log_prefix, sizeof(log_prefix), "imap(%s)", user);
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114
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115 if (getenv("USE_SYSLOG") != NULL) {
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116 const char *env = getenv("SYSLOG_FACILITY");
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117 i_set_failure_syslog(log_prefix, LOG_NDELAY,
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118 env == NULL ? LOG_MAIL : atoi(env));
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119 } else {
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120 /* log to file or stderr */
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121 i_set_failure_file(getenv("LOGFILE"), log_prefix);
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122 }
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123
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124 if (getenv("INFOLOGFILE") != NULL)
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125 i_set_info_file(getenv("INFOLOGFILE"));
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126
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127 i_set_failure_timestamp_format(getenv("LOGSTAMP"));
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128 }
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129
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diff changeset
130 static void drop_privileges(void)
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diff changeset
131 {
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diff changeset
132 /* Log file or syslog opening probably requires roots */
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diff changeset
133 open_logfile();
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diff changeset
134
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diff changeset
135 /* Most likely needed. Have to open /dev/urandom before possible
9f503b7851ab Moved all dotlocking code to lib/. Also we now use temp file + link() rather
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parents: 1591
diff changeset
136 chrooting. */
9f503b7851ab Moved all dotlocking code to lib/. Also we now use temp file + link() rather
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diff changeset
137 random_init();
9f503b7851ab Moved all dotlocking code to lib/. Also we now use temp file + link() rather
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diff changeset
138
801
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diff changeset
139 restrict_access_by_env(!IS_STANDALONE());
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diff changeset
140 }
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diff changeset
141
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diff changeset
142 static void main_init(void)
0
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143 {
903
fd8888f6f037 Naming style changes, finally got tired of most of the typedefs. Also the
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diff changeset
144 struct client *client;
1654
31c4bb26a1e9 Getting ready for namespaces. LIST is still broken with them.
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145 const char *user, *str;
550
3a83b05a0be3 --with-rawlog: Build support for logging traffic of user sessions. If
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diff changeset
146
4553
d1c0514754d5 Require that master's version number matches the child's, unless
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147 str = getenv("DOVECOT_VERSION");
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diff changeset
148 if (str != NULL && strcmp(str, PACKAGE_VERSION) != 0) {
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149 i_fatal("Dovecot version mismatch: "
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diff changeset
150 "Master is v%s, imap is v"PACKAGE_VERSION" "
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diff changeset
151 "(if you don't care, set version_ignore=yes)", str);
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152 }
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diff changeset
153
3620
3360cc019737 Implemented new signal handling framework, which makes handling signals much
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diff changeset
154 lib_signals_init();
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diff changeset
155 lib_signals_set_handler(SIGINT, TRUE, sig_die, NULL);
3360cc019737 Implemented new signal handling framework, which makes handling signals much
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diff changeset
156 lib_signals_set_handler(SIGTERM, TRUE, sig_die, NULL);
4253
545a747d0347 Use lib_signals_ignore() for signals we really want ignored.
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diff changeset
157 lib_signals_ignore(SIGPIPE);
3689
8b68997d6e34 Ignore SIGALRM signal. We don't want to crash when it happens.
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158 lib_signals_set_handler(SIGALRM, FALSE, NULL, NULL);
801
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diff changeset
159
1193
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diff changeset
160 user = getenv("USER");
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diff changeset
161 if (user == NULL) {
1194
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diff changeset
162 if (IS_STANDALONE())
1193
206190c8c66f Use getlogin() alternatively if USER environment isn't found.
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diff changeset
163 user = getlogin();
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diff changeset
164 if (user == NULL)
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165 i_fatal("USER environment missing");
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166 }
748
474319868e82 Sanity check to make sure USER environment exists.
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diff changeset
167
3034
de1b904c4df2 Print effective uid/gid when mail_debug is enabled.
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diff changeset
168 if (getenv("DEBUG") != NULL) {
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diff changeset
169 i_info("Effective uid=%s, gid=%s",
de1b904c4df2 Print effective uid/gid when mail_debug is enabled.
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170 dec2str(geteuid()), dec2str(getegid()));
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diff changeset
171 }
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diff changeset
172
4165
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diff changeset
173 if (getenv("STDERR_CLOSE_SHUTDOWN") != NULL) {
4149
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174 /* If master dies, the log fd gets closed and we'll quit */
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diff changeset
175 log_io = io_add(STDERR_FILENO, IO_ERROR,
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diff changeset
176 log_error_callback, NULL);
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diff changeset
177 }
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diff changeset
178
1586
898a95426118 Keep capability in string_t so plugins can modify it.
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diff changeset
179 capability_string = str_new(default_pool, sizeof(CAPABILITY_STRING)+32);
898a95426118 Keep capability in string_t so plugins can modify it.
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diff changeset
180 str_append(capability_string, CAPABILITY_STRING);
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diff changeset
181
4517
e661182eab75 Berkeley DB dict support is now enabled only when using --with-db configure option.
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diff changeset
182 dict_driver_register(&dict_driver_client);
1138
340dea0150bf Added client_workarounds setting, with currently one workaround for OE6.
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diff changeset
183 mail_storage_init();
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184 mail_storage_register_all();
1465
03dd87873a81 Added support for dynamically loadable imap/pop3 modules.
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diff changeset
185 clients_init();
1464
bd489d13479e Added command_register() and related functions so we can dynamically
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diff changeset
186 commands_init();
4492
e2cbc10c94f4 THREAD command handling is now done through a hash index file. This speeds
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diff changeset
187 imap_thread_init();
1465
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diff changeset
188
4446
6d0ca893eab8 Changed the mail_plugins/mail_plugin_dir settings to be passed as the same
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diff changeset
189 if (getenv("MAIL_PLUGINS") == NULL)
4074
dadc6e2cccb8 Replaced mail_use_modules and mail_modules settings with mail_plugins and
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diff changeset
190 modules = NULL;
dadc6e2cccb8 Replaced mail_use_modules and mail_modules settings with mail_plugins and
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diff changeset
191 else {
4446
6d0ca893eab8 Changed the mail_plugins/mail_plugin_dir settings to be passed as the same
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diff changeset
192 const char *plugin_dir = getenv("MAIL_PLUGIN_DIR");
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diff changeset
193
6d0ca893eab8 Changed the mail_plugins/mail_plugin_dir settings to be passed as the same
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parents: 4253
diff changeset
194 if (plugin_dir == NULL)
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diff changeset
195 plugin_dir = MODULEDIR"/imap";
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parents: 4253
diff changeset
196 modules = module_dir_load(plugin_dir, getenv("MAIL_PLUGINS"),
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parents: 4253
diff changeset
197 TRUE);
4074
dadc6e2cccb8 Replaced mail_use_modules and mail_modules settings with mail_plugins and
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diff changeset
198 }
0
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diff changeset
199
4197
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
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diff changeset
200 if (getenv("DUMP_CAPABILITY") != NULL) {
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
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parents: 4183
diff changeset
201 printf("%s\n", str_c(capability_string));
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
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diff changeset
202 exit(0);
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
Timo Sirainen <tss@iki.fi>
parents: 4183
diff changeset
203 }
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
Timo Sirainen <tss@iki.fi>
parents: 4183
diff changeset
204
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
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diff changeset
205 str = getenv("IMAP_CAPABILITY");
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
Timo Sirainen <tss@iki.fi>
parents: 4183
diff changeset
206 if (str != NULL && *str != '\0') {
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
Timo Sirainen <tss@iki.fi>
parents: 4183
diff changeset
207 /* Overrides all capabilities */
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
Timo Sirainen <tss@iki.fi>
parents: 4183
diff changeset
208 str_truncate(capability_string, 0);
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
Timo Sirainen <tss@iki.fi>
parents: 4183
diff changeset
209 str_append(capability_string, str);
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
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parents: 4183
diff changeset
210 }
c3ded5b815aa If we have plugins set and imap_capability unset, figure out the IMAP
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parents: 4183
diff changeset
211
1591
6eca99b727a0 IMAP parser memory limits are now enforced by bytes per line rather than
Timo Sirainen <tss@iki.fi>
parents: 1586
diff changeset
212 str = getenv("IMAP_MAX_LINE_LENGTH");
6eca99b727a0 IMAP parser memory limits are now enforced by bytes per line rather than
Timo Sirainen <tss@iki.fi>
parents: 1586
diff changeset
213 imap_max_line_length = str != NULL ?
6eca99b727a0 IMAP parser memory limits are now enforced by bytes per line rather than
Timo Sirainen <tss@iki.fi>
parents: 1586
diff changeset
214 (unsigned int)strtoul(str, NULL, 10) :
6eca99b727a0 IMAP parser memory limits are now enforced by bytes per line rather than
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parents: 1586
diff changeset
215 DEFAULT_IMAP_MAX_LINE_LENGTH;
6eca99b727a0 IMAP parser memory limits are now enforced by bytes per line rather than
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parents: 1586
diff changeset
216
1959
50e24ce4f9c3 and a few more custom flag -> keyword changes
Timo Sirainen <tss@iki.fi>
parents: 1958
diff changeset
217 str = getenv("MAIL_MAX_KEYWORD_LENGTH");
1958
4dec6a3d79fd s/custom flags/keywords/
Timo Sirainen <tss@iki.fi>
parents: 1917
diff changeset
218 max_keyword_length = str != NULL ?
1168
03f1455664d7 Added setting to limit length of custom flag names.
Timo Sirainen <tss@iki.fi>
parents: 1138
diff changeset
219 (unsigned int)strtoul(str, NULL, 10) :
1958
4dec6a3d79fd s/custom flags/keywords/
Timo Sirainen <tss@iki.fi>
parents: 1917
diff changeset
220 DEFAULT_MAX_KEYWORD_LENGTH;
1168
03f1455664d7 Added setting to limit length of custom flag names.
Timo Sirainen <tss@iki.fi>
parents: 1138
diff changeset
221
2316
1c1ed4494aa4 Split client_workarounds to imap_ and pop3_ ones. Added outlook-no-nuls POP3
Timo Sirainen <tss@iki.fi>
parents: 2235
diff changeset
222 parse_workarounds();
1c1ed4494aa4 Split client_workarounds to imap_ and pop3_ ones. Added outlook-no-nuls POP3
Timo Sirainen <tss@iki.fi>
parents: 2235
diff changeset
223
1654
31c4bb26a1e9 Getting ready for namespaces. LIST is still broken with them.
Timo Sirainen <tss@iki.fi>
parents: 1652
diff changeset
224 namespace_pool = pool_alloconly_create("namespaces", 1024);
1694
0fae24674a9a Separated rawlog into it's own binary.
Timo Sirainen <tss@iki.fi>
parents: 1654
diff changeset
225 client = client_create(0, 1, namespace_init(namespace_pool, user));
0
3b1985cbc908 Initial revision
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parents:
diff changeset
226
1498
5a247fb1673c Minor speedup
Timo Sirainen <tss@iki.fi>
parents: 1465
diff changeset
227 o_stream_cork(client->output);
801
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 765
diff changeset
228 if (IS_STANDALONE()) {
620
d34ee528aa68 Send PREAUTH if we were started without LOGIN_TAG environment (ie. not
Timo Sirainen <tss@iki.fi>
parents: 597
diff changeset
229 client_send_line(client, t_strconcat(
4015
4aeb58dc4f18 PREAUTH banner should show the capability from capability_string in case
Timo Sirainen <tss@iki.fi>
parents: 3879
diff changeset
230 "* PREAUTH [CAPABILITY ",
4aeb58dc4f18 PREAUTH banner should show the capability from capability_string in case
Timo Sirainen <tss@iki.fi>
parents: 3879
diff changeset
231 str_c(capability_string), "] "
1193
206190c8c66f Use getlogin() alternatively if USER environment isn't found.
Timo Sirainen <tss@iki.fi>
parents: 1172
diff changeset
232 "Logged in as ", user, NULL));
1316
02dc0b35af64 Support for mailfront.
Timo Sirainen <tss@iki.fi>
parents: 1194
diff changeset
233 } else if (getenv("IMAPLOGINTAG") != NULL) {
02dc0b35af64 Support for mailfront.
Timo Sirainen <tss@iki.fi>
parents: 1194
diff changeset
234 /* Support for mailfront */
02dc0b35af64 Support for mailfront.
Timo Sirainen <tss@iki.fi>
parents: 1194
diff changeset
235 client_send_line(client, t_strconcat(getenv("IMAPLOGINTAG"),
02dc0b35af64 Support for mailfront.
Timo Sirainen <tss@iki.fi>
parents: 1194
diff changeset
236 " OK Logged in.", NULL));
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
237 }
2421
d141e1bfdd63 We never do blocking reads/writes to network anymore. Changed imap and pop3
Timo Sirainen <tss@iki.fi>
parents: 2316
diff changeset
238 o_stream_uncork(client->output);
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
239 }
3b1985cbc908 Initial revision
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parents:
diff changeset
240
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
241 static void main_deinit(void)
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
242 {
4149
b10fa8ba01ca When master dies (by closing log file descriptor), kill ourself also.
Timo Sirainen <tss@iki.fi>
parents: 4074
diff changeset
243 if (log_io != NULL)
b10fa8ba01ca When master dies (by closing log file descriptor), kill ourself also.
Timo Sirainen <tss@iki.fi>
parents: 4074
diff changeset
244 io_remove(&log_io);
4183
32b5045f8d80 Destroy client connection at deinit before unloading modules.
Timo Sirainen <tss@iki.fi>
parents: 4165
diff changeset
245 clients_deinit();
1465
03dd87873a81 Added support for dynamically loadable imap/pop3 modules.
Timo Sirainen <tss@iki.fi>
parents: 1464
diff changeset
246
4183
32b5045f8d80 Destroy client connection at deinit before unloading modules.
Timo Sirainen <tss@iki.fi>
parents: 4165
diff changeset
247 module_dir_unload(&modules);
4492
e2cbc10c94f4 THREAD command handling is now done through a hash index file. This speeds
Timo Sirainen <tss@iki.fi>
parents: 4446
diff changeset
248 imap_thread_deinit();
1465
03dd87873a81 Added support for dynamically loadable imap/pop3 modules.
Timo Sirainen <tss@iki.fi>
parents: 1464
diff changeset
249 commands_deinit();
1351
6709d9330885 minor memory leak/cleanup fixes
Timo Sirainen <tss@iki.fi>
parents: 1316
diff changeset
250 mail_storage_deinit();
4517
e661182eab75 Berkeley DB dict support is now enabled only when using --with-db configure option.
Timo Sirainen <timo.sirainen@movial.fi>
parents: 4492
diff changeset
251 dict_driver_unregister(&dict_driver_client);
1597
9f503b7851ab Moved all dotlocking code to lib/. Also we now use temp file + link() rather
Timo Sirainen <tss@iki.fi>
parents: 1591
diff changeset
252 random_deinit();
1654
31c4bb26a1e9 Getting ready for namespaces. LIST is still broken with them.
Timo Sirainen <tss@iki.fi>
parents: 1652
diff changeset
253 pool_unref(namespace_pool);
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
254
3879
928229f8b3e6 deinit, unref, destroy, close, free, etc. functions now take a pointer to
Timo Sirainen <tss@iki.fi>
parents: 3789
diff changeset
255 str_free(&capability_string);
1967
b6d900688c55 memory leak fixes
Timo Sirainen <tss@iki.fi>
parents: 1959
diff changeset
256
3620
3360cc019737 Implemented new signal handling framework, which makes handling signals much
Timo Sirainen <tss@iki.fi>
parents: 3505
diff changeset
257 lib_signals_deinit();
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
258 closelog();
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
259 }
3b1985cbc908 Initial revision
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parents:
diff changeset
260
801
86224ff16bf6 Drop root privileges earlier. Close syslog more later in imap-master when
Timo Sirainen <tss@iki.fi>
parents: 765
diff changeset
261 int main(int argc __attr_unused__, char *argv[], char *envp[])
0
3b1985cbc908 Initial revision
Timo Sirainen <tss@iki.fi>
parents:
diff changeset
262 {
727
8dd8ebe6bcac We use close-on-exec flag now to make sure that master process closes the
Timo Sirainen <tss@iki.fi>
parents: 621
diff changeset
263 #ifdef DEBUG
2235
dcff4c088f1a DEBUG: If GDB environment is set, don't do fd leak checks.
Timo Sirainen <tss@iki.fi>
parents: 2084
diff changeset
264 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
265 fd_debug_verify_leaks(3, 1024);
727
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266 #endif
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267 if (IS_STANDALONE() && getuid() == 0 &&
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268 net_getpeername(1, NULL, NULL) == 0) {
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269 printf("* BAD [ALERT] imap binary must not be started from "
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270 "inetd, use imap-login instead.\n");
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271 return 1;
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272 }
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273
0
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274 /* NOTE: we start rooted, so keep the code minimal until
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275 restrict_access_by_env() is called */
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276 lib_init();
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277 drop_privileges();
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278
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279 process_title_init(argv, envp);
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280 ioloop = io_loop_create(system_pool);
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281
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282 main_init();
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283 io_loop_run(ioloop);
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284 main_deinit();
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285
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286 io_loop_destroy(&ioloop);
0
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287 lib_deinit();
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288
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289 return 0;
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290 }