Mercurial > dovecot > original-hg > dovecot-1.2
annotate src/master/main.c @ 805:5ac361acb316 HEAD
Marked all non-trivial buffer modifications with @UNSAFE tag. Several
cleanups and a couple of minor bugfixes.
| author | Timo Sirainen <tss@iki.fi> |
|---|---|
| date | Wed, 18 Dec 2002 17:15:41 +0200 |
| parents | 86224ff16bf6 |
| children | 35abd7a5d381 |
| rev | line source |
|---|---|
| 0 | 1 /* Copyright (C) 2002 Timo Sirainen */ |
| 2 | |
| 3 #include "common.h" | |
| 4 #include "ioloop.h" | |
| 5 #include "lib-signals.h" | |
| 6 #include "network.h" | |
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7 #include "env-util.h" |
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8 #include "fd-close-on-exec.h" |
| 0 | 9 |
| 10 #include "auth-process.h" | |
| 11 #include "login-process.h" | |
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12 #include "ssl-init.h" |
| 0 | 13 |
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14 #include <stdio.h> |
| 0 | 15 #include <stdlib.h> |
| 16 #include <unistd.h> | |
| 17 #include <fcntl.h> | |
| 18 #include <syslog.h> | |
| 19 #include <sys/stat.h> | |
| 20 #include <sys/wait.h> | |
| 21 | |
| 22 const char *process_names[PROCESS_TYPE_MAX] = { | |
| 23 "unknown", | |
| 24 "auth", | |
| 25 "login", | |
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26 "imap", |
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27 "ssl-param" |
| 0 | 28 }; |
| 29 | |
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30 static const char *configfile = SYSCONFDIR "/" PACKAGE ".conf"; |
| 0 | 31 static IOLoop ioloop; |
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32 static Timeout to; |
| 0 | 33 |
| 34 HashTable *pids; | |
| 35 int null_fd, imap_fd, imaps_fd; | |
| 36 | |
| 37 int validate_str(const char *str, int max_len) | |
| 38 { | |
| 39 int i; | |
| 40 | |
| 41 for (i = 0; i < max_len; i++) { | |
| 42 if (str[i] == '\0') | |
| 43 return TRUE; | |
| 44 } | |
| 45 | |
| 46 return FALSE; | |
| 47 } | |
| 48 | |
| 49 void clean_child_process(void) | |
| 50 { | |
| 51 /* remove all environment, we don't need them */ | |
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52 env_clean(); |
| 0 | 53 |
| 54 /* set the failure log */ | |
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55 if (set_log_path != NULL) |
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56 env_put(t_strconcat("IMAP_LOGFILE=", set_log_path, NULL)); |
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57 else |
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58 env_put("IMAP_USE_SYSLOG=1"); |
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59 |
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60 if (set_log_timestamp != NULL) |
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61 env_put(t_strconcat("IMAP_LOGSTAMP=", set_log_timestamp, NULL)); |
| 0 | 62 } |
| 63 | |
| 64 static void sig_quit(int signo __attr_unused__) | |
| 65 { | |
| 66 io_loop_stop(ioloop); | |
| 67 } | |
| 68 | |
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69 static void settings_reload(void) |
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70 { |
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71 i_warning("SIGHUP received - reloading configuration"); |
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72 |
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73 settings_read(configfile); |
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74 |
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75 /* restart auth and login processes */ |
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76 login_processes_destroy_all(); |
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77 auth_processes_destroy_all(); |
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78 } |
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79 |
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80 static const char *get_exit_status_message(FatalExitStatus status) |
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81 { |
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82 switch (status) { |
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83 case FATAL_LOGOPEN: |
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84 return "Can't open log file"; |
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85 case FATAL_LOGWRITE: |
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86 return "Can't write to log file"; |
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87 case FATAL_OUTOFMEM: |
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88 return "Out of memory"; |
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89 case FATAL_EXEC: |
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90 return "exec() failed"; |
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91 |
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92 case FATAL_DEFAULT: |
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93 return NULL; |
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94 } |
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95 |
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96 return NULL; |
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97 } |
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98 |
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99 static void timeout_handler(void *context __attr_unused__, |
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100 Timeout timeout __attr_unused__) |
| 0 | 101 { |
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102 const char *process_type_name, *msg; |
| 0 | 103 pid_t pid; |
| 104 int status, process_type; | |
| 105 | |
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106 if (lib_signal_hup != 0) { |
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107 settings_reload(); |
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108 lib_signal_hup = 0; |
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109 } |
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110 |
| 0 | 111 while ((pid = waitpid(-1, &status, WNOHANG)) > 0) { |
| 112 /* get the type and remove from hash */ | |
| 113 process_type = PID_GET_PROCESS_TYPE(pid); | |
| 114 PID_REMOVE_PROCESS_TYPE(pid); | |
| 115 | |
| 116 if (process_type == PROCESS_TYPE_IMAP) | |
| 117 imap_process_destroyed(pid); | |
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118 if (process_type == PROCESS_TYPE_SSL_PARAM) |
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119 ssl_parameter_process_destroyed(pid); |
| 0 | 120 |
| 121 /* write errors to syslog */ | |
| 122 process_type_name = process_names[process_type]; | |
| 123 if (WIFEXITED(status)) { | |
| 124 status = WEXITSTATUS(status); | |
| 125 if (status != 0) { | |
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126 login_process_abormal_exit(pid); |
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127 msg = get_exit_status_message(status); |
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128 if (msg != NULL) |
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129 msg = t_strconcat(" (", msg, ")", NULL); |
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130 i_error("child %d (%s) returned error %d%s", |
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131 (int)pid, process_type_name, |
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132 status, msg); |
| 0 | 133 } |
| 134 } else if (WIFSIGNALED(status)) { | |
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135 login_process_abormal_exit(pid); |
| 0 | 136 i_error("child %d (%s) killed with signal %d", |
| 137 (int)pid, process_type_name, WTERMSIG(status)); | |
| 138 } | |
| 139 } | |
| 140 | |
| 141 if (pid == -1 && errno != EINTR && errno != ECHILD) | |
| 142 i_warning("waitpid() failed: %m"); | |
| 143 } | |
| 144 | |
| 145 static IPADDR *resolve_ip(const char *name) | |
| 146 { | |
| 147 IPADDR *ip; | |
| 148 int ret, ips_count; | |
| 149 | |
| 36 | 150 if (name == NULL || *name == '\0') |
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151 return NULL; /* defaults to "*" or "::" */ |
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152 |
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153 if (strcmp(name, "*") == 0) { |
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154 /* IPv4 any */ |
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155 ip = t_new(IPADDR, 1); |
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156 net_get_ip_any4(ip); |
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157 return ip; |
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158 } |
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159 |
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160 if (strcmp(name, "::") == 0) { |
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161 /* IPv6 any */ |
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162 ip = t_new(IPADDR, 1); |
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163 net_get_ip_any6(ip); |
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164 return ip; |
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165 } |
| 0 | 166 |
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167 /* Return the first IP if there happens to be multiple. */ |
| 0 | 168 ret = net_gethostbyname(name, &ip, &ips_count); |
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169 if (ret != 0) { |
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170 i_fatal("Can't resolve address %s: %s", |
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171 name, net_gethosterror(ret)); |
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172 } |
| 0 | 173 |
| 174 if (ips_count < 1) | |
| 36 | 175 i_fatal("No IPs for address: %s", name); |
| 0 | 176 |
| 177 return ip; | |
| 178 } | |
| 179 | |
| 180 static void open_fds(void) | |
| 181 { | |
| 182 IPADDR *imap_ip, *imaps_ip; | |
| 183 | |
| 184 imap_ip = resolve_ip(set_imap_listen); | |
| 185 imaps_ip = resolve_ip(set_imaps_listen); | |
| 186 | |
| 187 if (imaps_ip == NULL && set_imaps_listen == NULL) | |
| 188 imaps_ip = imap_ip; | |
| 189 | |
| 190 null_fd = open("/dev/null", O_RDONLY); | |
| 191 if (null_fd == -1) | |
| 192 i_fatal("Can't open /dev/null: %m"); | |
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193 fd_close_on_exec(null_fd, TRUE); |
| 0 | 194 |
| 195 imap_fd = set_imap_port == 0 ? dup(null_fd) : | |
| 196 net_listen(imap_ip, &set_imap_port); | |
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197 if (imap_fd == -1) |
| 468 | 198 i_fatal("listen(%d) failed: %m", set_imap_port); |
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199 fd_close_on_exec(imap_fd, TRUE); |
| 0 | 200 |
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201 #ifdef HAVE_SSL |
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202 imaps_fd = set_ssl_disable || set_imaps_port == 0 ? dup(null_fd) : |
| 0 | 203 net_listen(imaps_ip, &set_imaps_port); |
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204 #else |
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205 imaps_fd = dup(null_fd); |
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206 #endif |
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207 if (imaps_fd == -1) |
| 0 | 208 i_fatal("listen(%d) failed: %m", set_imaps_port); |
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209 fd_close_on_exec(imaps_fd, TRUE); |
| 0 | 210 } |
| 211 | |
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212 static void open_logfile(void) |
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213 { |
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214 if (set_log_path == NULL) |
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215 i_set_failure_syslog("imap-master", LOG_NDELAY, LOG_MAIL); |
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216 else { |
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217 /* log to file or stderr */ |
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218 i_set_failure_file(set_log_path, "imap-master"); |
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219 i_set_failure_timestamp_format(set_log_timestamp); |
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220 } |
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221 } |
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222 |
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50
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223 static void main_init(void) |
| 0 | 224 { |
| 225 /* deny file access from everyone else except owner */ | |
| 226 (void)umask(0077); | |
| 227 | |
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228 open_logfile(); |
| 0 | 229 |
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230 lib_init_signals(sig_quit); |
| 0 | 231 |
| 232 pids = hash_create(default_pool, 128, NULL, NULL); | |
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233 to = timeout_add(100, timeout_handler, NULL); |
| 0 | 234 |
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235 ssl_init(); |
| 0 | 236 auth_processes_init(); |
| 237 login_processes_init(); | |
| 238 } | |
| 239 | |
| 240 static void main_deinit(void) | |
| 241 { | |
| 242 if (lib_signal_kill != 0) | |
| 243 i_warning("Killed with signal %d", lib_signal_kill); | |
| 244 | |
| 245 login_processes_deinit(); | |
| 246 auth_processes_deinit(); | |
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247 ssl_deinit(); |
| 0 | 248 |
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249 timeout_remove(to); |
| 0 | 250 |
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251 if (close(null_fd) < 0) |
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252 i_error("close(null_fd) failed: %m"); |
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253 if (close(imap_fd) < 0) |
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254 i_error("close(imap_fd) failed: %m"); |
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255 if (close(imaps_fd) < 0) |
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256 i_error("close(imaps_fd) failed: %m"); |
| 0 | 257 |
| 258 hash_destroy(pids); | |
| 259 closelog(); | |
| 260 } | |
| 261 | |
| 262 static void daemonize(void) | |
| 263 { | |
| 264 pid_t pid; | |
| 265 | |
| 266 pid = fork(); | |
| 267 if (pid < 0) | |
| 268 i_fatal("fork() failed: %m"); | |
| 269 | |
| 270 if (pid != 0) | |
| 271 _exit(0); | |
| 610 | 272 |
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273 if (setsid() < 0) |
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274 i_fatal("setsid() failed: %m"); |
| 0 | 275 } |
| 276 | |
|
279
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277 static void print_help(void) |
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278 { |
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279 printf("Usage: imap-master [-F] [-c <config file>]\n"); |
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280 } |
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281 |
| 0 | 282 int main(int argc, char *argv[]) |
| 283 { | |
| 284 /* parse arguments */ | |
| 285 int foreground = FALSE; | |
| 286 int i; | |
| 287 | |
| 288 lib_init(); | |
| 289 | |
| 290 for (i = 1; i < argc; i++) { | |
| 291 if (strcmp(argv[i], "-F") == 0) { | |
| 292 /* foreground */ | |
| 293 foreground = TRUE; | |
| 294 } else if (strcmp(argv[i], "-c") == 0) { | |
| 295 /* config file */ | |
| 296 i++; | |
| 297 if (i == argc) i_fatal("Missing config file argument"); | |
| 298 configfile = argv[i]; | |
| 299 } else { | |
|
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300 print_help(); |
| 0 | 301 i_fatal("Unknown argument: %s", argv[1]); |
| 302 } | |
| 303 } | |
| 304 | |
| 305 /* read and verify settings before forking */ | |
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306 settings_init(); |
| 0 | 307 settings_read(configfile); |
| 308 open_fds(); | |
| 309 | |
| 310 if (!foreground) | |
| 311 daemonize(); | |
| 312 | |
|
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60040a9d243f
ioloop_create() takes now pool-parameter. io_buffer_create_mmaped() takes
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313 ioloop = io_loop_create(system_pool); |
| 0 | 314 |
|
35
b420373f88f6
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315 main_init(); |
| 0 | 316 io_loop_run(ioloop); |
| 317 main_deinit(); | |
| 318 | |
| 319 io_loop_destroy(ioloop); | |
| 320 lib_deinit(); | |
| 321 | |
| 322 return 0; | |
| 323 } |