2 * citserver's main() function lives here.
4 * Copyright (c) 1987-2019 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.
17 #include <sys/types.h>
21 #include <libcitadel.h>
23 #include "citserver.h"
24 #include "svn_revision.h"
25 #include "modules_init.h"
28 #include "serv_extensions.h"
29 #include "citadel_dirs.h"
33 const char *CitadelServiceUDS="citadel-UDS";
34 const char *CitadelServiceTCP="citadel-TCP";
35 void go_threading(void);
36 int sanity_diag_mode = 0;
40 * Create or remove a lock file, so we only have one Citadel Server running at a time.
42 void ctdl_lockfile(int yo) {
43 static char lockfilename[SIZ];
47 syslog(LOG_DEBUG, "main: creating lockfile");
48 snprintf(lockfilename, sizeof lockfilename, "%s/citadel.lock", ctdl_run_dir);
49 fp = fopen(lockfilename, "w");
51 syslog(LOG_ERR, "%s: %m", lockfilename);
54 if (flock(fileno(fp), (LOCK_EX|LOCK_NB)) != 0) {
55 syslog(LOG_ERR, "main: cannot lock %s , is another citserver running?", lockfilename);
61 syslog(LOG_DEBUG, "main: removing lockfile");
63 flock(fileno(fp), LOCK_UN);
69 * Here's where it all begins.
71 int main(int argc, char **argv)
75 int a; /* General-purpose variables */
76 struct passwd pw, *pwp = NULL;
78 int drop_root_perms = 1;
82 int max_log_level = LOG_INFO;
83 char relhome[PATH_MAX]="";
84 char ctdldir[PATH_MAX]=CTDLDIR;
85 int syslog_facility = LOG_DAEMON;
87 struct passwd *p = NULL;
89 struct stat filestats;
92 /* initialize the master context */
94 InitializeMasterTSD();
96 /* parse command-line arguments */
97 while ((a=getopt(argc, argv, "l:dh:x:t:B:Dru:s:")) != EOF) switch(a) {
100 safestrncpy(facility, optarg, sizeof(facility));
101 syslog_facility = SyslogFacility(facility);
104 /* run in the background if -d was specified */
106 running_as_daemon = 1;
110 relh = optarg[0] != '/';
112 safestrncpy(ctdl_home_directory, optarg, sizeof ctdl_home_directory);
115 safestrncpy(relhome, optarg, sizeof relhome);
121 max_log_level = atoi(optarg);
124 case 't': /* deprecated */
126 case 'B': /* Basesize */
127 basesize = atoi(optarg);
134 /* -r tells the server not to drop root permissions.
135 * Don't use this unless you know what you're doing.
141 /* -u tells the server what uid to run under... */
148 p = getpwnam(optarg);
158 /* -s tells the server to behave differently during sanity checks */
160 sanity_diag_mode = atoi(optarg);
164 /* any other parameter makes it crash and burn */
165 fprintf(stderr, "citserver: usage: "
176 /* Last ditch effort to determine the user name ... if there's a user called "citadel" then use that */
178 p = getpwnam("citadel");
183 p = getpwnam("guest");
193 if ((ctdluid == 0) && (drop_root_perms == 0)) {
194 fprintf(stderr, "citserver: cannot determine user to run as; please specify -r or -u options\n");
195 exit(CTDLEXIT_UNUSER);
198 StartLibCitadel(basesize);
199 setlogmask(LOG_UPTO(max_log_level));
201 ( running_as_daemon ? (LOG_PID) : (LOG_PID | LOG_PERROR) ),
205 calc_dirs_n_files(relh, home, relhome, ctdldir, dbg);
206 /* daemonize, if we were asked to */
207 if (running_as_daemon) {
212 /* Tell 'em who's in da house */
213 syslog(LOG_INFO, " ");
214 syslog(LOG_INFO, " ");
215 syslog(LOG_INFO, "*** Citadel server engine ***\n");
216 syslog(LOG_INFO, "Version %d (build %s) ***", REV_LEVEL, svn_revision());
217 syslog(LOG_INFO, "Copyright (C) 1987-2019 by the Citadel development team.");
218 syslog(LOG_INFO, " ");
219 syslog(LOG_INFO, "This program is open source software: you can redistribute it and/or");
220 syslog(LOG_INFO, "modify it under the terms of the GNU General Public License, version 3.");
221 syslog(LOG_INFO, " ");
222 syslog(LOG_INFO, "This program is distributed in the hope that it will be useful,");
223 syslog(LOG_INFO, "but WITHOUT ANY WARRANTY; without even the implied warranty of");
224 syslog(LOG_INFO, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
225 syslog(LOG_INFO, "GNU General Public License for more details.");
226 syslog(LOG_INFO, " ");
227 syslog(LOG_INFO, "%s", libcitadel_version_string());
230 /* on some dists rundir gets purged on startup. so we need to recreate it. */
232 if (stat(ctdl_run_dir, &filestats) == -1) {
233 #ifdef HAVE_GETPWUID_R
234 #ifdef SOLARIS_GETPWUID
235 pwp = getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf));
236 #else // SOLARIS_GETPWUID
237 getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
238 #endif // SOLARIS_GETPWUID
239 #else // HAVE_GETPWUID_R
241 #endif // HAVE_GETPWUID_R
243 if ((mkdir(ctdl_run_dir, 0755) != 0) && (errno != EEXIST)) {
244 syslog(LOG_ERR, "main: unable to create run directory [%s]: %m", ctdl_run_dir);
247 if (chown(ctdl_run_dir, ctdluid, (pwp==NULL)?-1:pw.pw_gid) != 0) {
248 syslog(LOG_ERR, "main: unable to set the access rights for [%s]: %m", ctdl_run_dir);
259 * Do non system dependent startup functions.
264 * Check that the control record is correct and place sensible values if it isn't
269 * Run any upgrade entry points
271 syslog(LOG_INFO, "main: upgrading modules");
275 * Load the user for the masterCC or create them if they don't exist
277 if (CtdlGetUser(&masterCC.user, "SYS_Citadel"))
279 /* User doesn't exist. We can't use create user here as the user number needs to be 0 */
280 strcpy (masterCC.user.fullname, "SYS_Citadel") ;
281 CtdlPutUser(&masterCC.user);
282 CtdlGetUser(&masterCC.user, "SYS_Citadel"); /* Just to be safe */
286 * Bind the server to a Unix-domain socket (user client access)
288 CtdlRegisterServiceHook(0,
290 citproto_begin_session,
296 * Bind the server to a Unix-domain socket (admin client access)
298 CtdlRegisterServiceHook(0,
299 file_citadel_admin_socket,
300 citproto_begin_admin_session,
304 chmod(file_citadel_admin_socket, S_IRWXU); /* for your eyes only */
307 * Bind the server to our favorite TCP port (usually 504).
309 CtdlRegisterServiceHook(CtdlGetConfigInt("c_port_number"),
311 citproto_begin_session,
320 * Load any server-side extensions available here.
322 syslog(LOG_INFO, "main: initializing server extensions");
324 initialise_modules(0);
327 * If we need host auth, start our chkpwd daemon.
329 if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_HOST) {
330 start_chkpwd_daemon();
334 * check, whether we're fired up another time after a crash.
335 * if, post an aide message, so the admin has a chance to react.
340 * Now that we've bound the sockets, change to the Citadel user id and its
341 * corresponding group ids
343 if (drop_root_perms) {
344 cdb_chmod_data(); /* make sure we own our data files */
346 #ifdef HAVE_GETPWUID_R
347 #ifdef SOLARIS_GETPWUID
348 pwp = getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf));
349 #else // SOLARIS_GETPWUID
350 getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
351 #endif // SOLARIS_GETPWUID
352 #else // HAVE_GETPWUID_R
354 #endif // HAVE_GETPWUID_R
357 syslog(LOG_ERR, "main: WARNING, getpwuid(%ld): %m Group IDs will be incorrect.", (long)CTDLUID);
359 initgroups(pw.pw_name, pw.pw_gid);
360 if (setgid(pw.pw_gid))
361 syslog(LOG_ERR, "main: setgid(%ld): %m", (long)pw.pw_gid);
363 syslog(LOG_INFO, "main: changing uid to %ld", (long)CTDLUID);
364 if (setuid(CTDLUID) != 0) {
365 syslog(LOG_ERR, "main: setuid() failed: %m");
367 #if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
368 prctl(PR_SET_DUMPABLE, 1);
372 /* We want to check for idle sessions once per minute */
373 CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER, PRIO_CLEANUP + 1);
377 int exit_code = master_cleanup(exit_signal);