2 * Main source module for the Citadel server
4 * Copyright (c) 1987-2015 by the citadel.org team
6 * This program is open source software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 3.
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
24 #include <libcitadel.h>
26 #include "ctdl_module.h"
27 #include "housekeeping.h"
28 #include "locate_host.h"
29 #include "citserver.h"
34 char *unique_session_numbers;
35 int ScheduledShutdown = 0;
36 time_t server_startup_time;
38 int openid_level_supported = 0;
41 * print the actual stack frame.
43 void cit_backtrace(void)
46 void *stack_frames[50];
50 const char *p = IOSTR;
51 if (p == NULL) p = "";
52 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
53 strings = backtrace_symbols(stack_frames, size);
54 for (i = 0; i < size; i++) {
56 syslog(LOG_ALERT, "%s %s\n", p, strings[i]);
58 syslog(LOG_ALERT, "%s %p\n", p, stack_frames[i]);
64 void cit_oneline_backtrace(void)
67 void *stack_frames[50];
72 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
73 strings = backtrace_symbols(stack_frames, size);
77 for (i = 1; i < size; i++) {
79 StrBufAppendPrintf(Buf, "%s : ", strings[i]);
81 StrBufAppendPrintf(Buf, "%p : ", stack_frames[i]);
84 syslog(LOG_ALERT, "%s %s\n", IOSTR, ChrPtr(Buf));
91 * print the actual stack frame.
93 void cit_panic_backtrace(int SigNum)
96 void *stack_frames[10];
100 printf("caught signal 11\n");
101 size = backtrace(stack_frames, sizeof(stack_frames) / sizeof(void*));
102 strings = backtrace_symbols(stack_frames, size);
103 for (i = 0; i < size; i++) {
105 syslog(LOG_ALERT, "%s\n", strings[i]);
107 syslog(LOG_ALERT, "%p\n", stack_frames[i]);
115 * Various things that need to be initialized at startup
117 void master_startup(void) {
121 struct ctdlroom qrbuf;
126 syslog(LOG_DEBUG, "master_startup() started\n");
127 time(&server_startup_time);
129 syslog(LOG_INFO, "Checking directory access");
130 if ((pw = getpwuid(ctdluid)) == NULL) {
136 if (create_run_directories(CTDLUID, gid) != 0) {
137 syslog(LOG_EMERG, "failed to access & create directories");
140 syslog(LOG_INFO, "Opening databases");
143 /* Load site-specific configuration */
144 syslog(LOG_INFO, "Initializing configuration system");
145 initialize_config_system();
147 migrate_legacy_control_record();
149 /* Check floor reference counts */
152 syslog(LOG_INFO, "Creating base rooms (if necessary)\n");
153 CtdlCreateRoom(CtdlGetConfigStr("c_baseroom"), 0, "", 0, 1, 0, VIEW_BBS);
154 CtdlCreateRoom(AIDEROOM, 3, "", 0, 1, 0, VIEW_BBS);
155 CtdlCreateRoom(SYSCONFIGROOM, 3, "", 0, 1, 0, VIEW_BBS);
156 CtdlCreateRoom(CtdlGetConfigStr("c_twitroom"), 0, "", 0, 1, 0, VIEW_BBS);
158 /* The "Local System Configuration" room doesn't need to be visible */
159 if (CtdlGetRoomLock(&qrbuf, SYSCONFIGROOM) == 0) {
160 qrbuf.QRflags2 |= QR2_SYSTEM;
161 CtdlPutRoomLock(&qrbuf);
164 /* Aide needs to be public postable, else we're not RFC conformant. */
165 if (CtdlGetRoomLock(&qrbuf, AIDEROOM) == 0) {
166 qrbuf.QRflags2 |= QR2_SMTP_PUBLIC;
167 CtdlPutRoomLock(&qrbuf);
170 syslog(LOG_INFO, "Seeding the pseudo-random number generator...\n");
171 urandom = fopen("/dev/urandom", "r");
172 if (urandom != NULL) {
173 rv = fread(&seed, sizeof seed, 1, urandom);
175 syslog(LOG_EMERG, "failed to read random seed: %s\n",
180 gettimeofday(&tv, NULL);
186 syslog(LOG_DEBUG, "master_startup() finished\n");
191 * Cleanup routine to be called when the server is shutting down. Returns the needed exit code.
193 int master_cleanup(int exitcode) {
194 struct CleanupFunctionHook *fcn;
195 static int already_cleaning_up = 0;
197 if (already_cleaning_up) while(1) usleep(1000000);
198 already_cleaning_up = 1;
200 /* Run any cleanup routines registered by loadable modules */
201 for (fcn = CleanupHookTable; fcn != NULL; fcn = fcn->next) {
202 (*fcn->h_function_pointer)();
205 /* Close the AdjRefCount queue file */
208 /* Do system-dependent stuff */
209 sysdep_master_cleanup();
211 /* Close the configuration system */
212 shutdown_config_system();
214 /* Close databases */
215 syslog(LOG_INFO, "Closing databases\n");
218 /* If the operator requested a halt but not an exit, halt here. */
219 if (shutdown_and_halt) {
220 syslog(LOG_NOTICE, "citserver: Halting server without exiting.\n");
221 fflush(stdout); fflush(stderr);
228 syslog(LOG_NOTICE, "citserver: Exiting with status %d\n", exitcode);
229 fflush(stdout); fflush(stderr);
231 if (restart_server != 0) {
234 else if ((running_as_daemon != 0) && ((exitcode == 0) )) {
235 exitcode = CTDLEXIT_SHUTDOWN;
243 * returns an asterisk if there are any instant messages waiting,
246 char CtdlCheckExpress(void) {
247 if (CC->FirstExpressMessage == NULL) {
257 * Check originating host against the public_clients file. This determines
258 * whether the client is allowed to change the hostname for this session
259 * (for example, to show the location of the user rather than the location
262 int CtdlIsPublicClient(void)
268 char *public_clientspos;
269 char *public_clientsend;
272 static time_t pc_timestamp = 0;
273 static char public_clients[SIZ];
274 static char public_clients_file[SIZ];
276 #define LOCALHOSTSTR "127.0.0.1"
278 snprintf(public_clients_file, sizeof public_clients_file, "%s/public_clients", ctdl_etc_dir);
281 * Check the time stamp on the public_clients file. If it's been
282 * updated since the last time we were here (or if this is the first
283 * time we've been through the loop), read its contents and learn
284 * the IP addresses of the listed hosts.
286 if (stat(public_clients_file, &statbuf) != 0) {
287 /* No public_clients file exists, so bail out */
288 syslog(LOG_WARNING, "Warning: '%s' does not exist\n",
289 public_clients_file);
293 if (statbuf.st_mtime > pc_timestamp) {
294 begin_critical_section(S_PUBLIC_CLIENTS);
295 syslog(LOG_INFO, "Loading %s\n", public_clients_file);
297 public_clientspos = &public_clients[0];
298 public_clientsend = public_clientspos + SIZ;
299 safestrncpy(public_clientspos, LOCALHOSTSTR, sizeof public_clients);
300 public_clientspos += sizeof(LOCALHOSTSTR) - 1;
302 if (hostname_to_dotted_quad(addrbuf, CtdlGetConfigStr("c_fqdn")) == 0) {
303 *(public_clientspos++) = '|';
305 while (!IsEmptyStr (paddr) &&
306 (public_clientspos < public_clientsend))
307 *(public_clientspos++) = *(paddr++);
310 fp = fopen(public_clients_file, "r");
312 while ((fgets(buf, sizeof buf, fp)!=NULL) &&
313 (public_clientspos < public_clientsend)){
316 while (!IsEmptyStr(ptr)) {
324 while (ptr>buf && isspace(*ptr)) {
327 if (hostname_to_dotted_quad(addrbuf, buf) == 0) {
328 *(public_clientspos++) = '|';
330 while (!IsEmptyStr(paddr) &&
331 (public_clientspos < public_clientsend)){
332 *(public_clientspos++) = *(paddr++);
336 if (fp != NULL) fclose(fp);
337 pc_timestamp = time(NULL);
338 end_critical_section(S_PUBLIC_CLIENTS);
341 syslog(LOG_DEBUG, "Checking whether %s is a local or public client\n",
343 for (i=0; i<num_parms(public_clients); ++i) {
344 extract_token(addrbuf, public_clients, i, '|', sizeof addrbuf);
345 if (!strcasecmp(CC->cs_addr, addrbuf)) {
346 syslog(LOG_DEBUG, "... yes its local.\n");
351 /* No hits. This is not a public client. */
352 syslog(LOG_DEBUG, "... no it isn't.\n");
360 void citproto_begin_session() {
361 if (CC->nologin==1) {
362 cprintf("%d %s: Too many users are already online (maximum is %d)\n",
363 ERROR + MAX_SESSIONS_EXCEEDED,
364 CtdlGetConfigStr("c_nodename"), CtdlGetConfigInt("c_maxsessions")
366 CC->kill_me = KILLME_MAX_SESSIONS_EXCEEDED;
369 cprintf("%d %s Citadel server ready.\n", CIT_OK, CtdlGetConfigStr("c_nodename"));
370 CC->can_receive_im = 1;
375 void citproto_begin_admin_session() {
376 CC->internal_pgm = 1;
377 cprintf("%d %s Citadel server ADMIN CONNECTION ready.\n", CIT_OK, CtdlGetConfigStr("c_nodename"));
382 * This loop performs all asynchronous functions.
384 void do_async_loop(void) {
385 PerformSessionHooks(EVT_ASYNC);