2 * citserver's main() function lives here.
4 * Copyright (c) 1987-2018 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);
39 * Create or remove a lock file, so we only have one Citadel Server running at a time.
41 void ctdl_lockfile(int yo) {
42 static char lockfilename[SIZ];
46 syslog(LOG_DEBUG, "main: creating lockfile");
47 snprintf(lockfilename, sizeof lockfilename, "%s/citadel.lock", ctdl_run_dir);
48 fp = fopen(lockfilename, "w");
50 syslog(LOG_ERR, "%s: %m", lockfilename);
53 if (flock(fileno(fp), (LOCK_EX|LOCK_NB)) != 0) {
54 syslog(LOG_ERR, "main: cannot lock %s , is another citserver running?", lockfilename);
60 syslog(LOG_DEBUG, "main: removing lockfile");
62 flock(fileno(fp), LOCK_UN);
68 * Here's where it all begins.
70 int main(int argc, char **argv)
74 int a; /* General-purpose variables */
75 struct passwd pw, *pwp = NULL;
77 int drop_root_perms = 1;
81 int max_log_level = LOG_INFO;
82 char relhome[PATH_MAX]="";
83 char ctdldir[PATH_MAX]=CTDLDIR;
84 int syslog_facility = LOG_DAEMON;
86 struct passwd *p = NULL;
88 struct stat filestats;
91 /* initialize the master context */
93 InitializeMasterTSD();
95 /* parse command-line arguments */
96 while ((a=getopt(argc, argv, "l:dh:x:t:B:Dru:")) != EOF) switch(a) {
99 safestrncpy(facility, optarg, sizeof(facility));
100 syslog_facility = SyslogFacility(facility);
103 /* run in the background if -d was specified */
105 running_as_daemon = 1;
109 relh = optarg[0] != '/';
111 safestrncpy(ctdl_home_directory, optarg, sizeof ctdl_home_directory);
114 safestrncpy(relhome, optarg, sizeof relhome);
120 max_log_level = atoi(optarg);
123 case 't': /* deprecated */
125 case 'B': /* Basesize */
126 basesize = atoi(optarg);
133 /* -r tells the server not to drop root permissions.
134 * Don't use this unless you know what you're doing.
140 /* -u tells the server what uid to run under... */
147 p = getpwnam(optarg);
158 /* any other parameter makes it crash and burn */
159 fprintf(stderr, "citserver: usage: "
170 /* Last ditch effort to determine the user name ... if there's a user called "citadel" then use that */
172 p = getpwnam("citadel");
177 p = getpwnam("guest");
187 if ((ctdluid == 0) && (drop_root_perms == 0)) {
188 fprintf(stderr, "citserver: cannot determine user to run as; please specify -r or -u options\n");
189 exit(CTDLEXIT_UNUSER);
192 StartLibCitadel(basesize);
193 setlogmask(LOG_UPTO(max_log_level));
195 ( running_as_daemon ? (LOG_PID) : (LOG_PID | LOG_PERROR) ),
199 calc_dirs_n_files(relh, home, relhome, ctdldir, dbg);
200 /* daemonize, if we were asked to */
201 if (running_as_daemon) {
206 /* Tell 'em who's in da house */
207 syslog(LOG_INFO, " ");
208 syslog(LOG_INFO, " ");
209 syslog(LOG_INFO, "*** Citadel server engine ***\n");
210 syslog(LOG_INFO, "Version %d (build %s) ***", REV_LEVEL, svn_revision());
211 syslog(LOG_INFO, "Copyright (C) 1987-2018 by the Citadel development team.");
212 syslog(LOG_INFO, " ");
213 syslog(LOG_INFO, "This program is open source software: you can redistribute it and/or");
214 syslog(LOG_INFO, "modify it under the terms of the GNU General Public License, version 3.");
215 syslog(LOG_INFO, " ");
216 syslog(LOG_INFO, "This program is distributed in the hope that it will be useful,");
217 syslog(LOG_INFO, "but WITHOUT ANY WARRANTY; without even the implied warranty of");
218 syslog(LOG_INFO, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
219 syslog(LOG_INFO, "GNU General Public License for more details.");
220 syslog(LOG_INFO, " ");
221 syslog(LOG_INFO, "%s", libcitadel_version_string());
224 /* on some dists rundir gets purged on startup. so we need to recreate it. */
226 if (stat(ctdl_run_dir, &filestats) == -1) {
227 #ifdef HAVE_GETPWUID_R
228 #ifdef SOLARIS_GETPWUID
229 pwp = getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf));
230 #else // SOLARIS_GETPWUID
231 getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
232 #endif // SOLARIS_GETPWUID
233 #else // HAVE_GETPWUID_R
235 #endif // HAVE_GETPWUID_R
237 if ((mkdir(ctdl_run_dir, 0755) != 0) && (errno != EEXIST)) {
238 syslog(LOG_ERR, "main: unable to create run directory [%s]: %m", ctdl_run_dir);
241 if (chown(ctdl_run_dir, ctdluid, (pwp==NULL)?-1:pw.pw_gid) != 0) {
242 syslog(LOG_ERR, "main: unable to set the access rights for [%s]: %m", ctdl_run_dir);
253 * Do non system dependent startup functions.
258 * Check that the control record is correct and place sensible values if it isn't
263 * Run any upgrade entry points
265 syslog(LOG_INFO, "main: upgrading modules");
269 * Load the user for the masterCC or create them if they don't exist
271 if (CtdlGetUser(&masterCC.user, "SYS_Citadel"))
273 /* User doesn't exist. We can't use create user here as the user number needs to be 0 */
274 strcpy (masterCC.user.fullname, "SYS_Citadel") ;
275 CtdlPutUser(&masterCC.user);
276 CtdlGetUser(&masterCC.user, "SYS_Citadel"); /* Just to be safe */
280 * Bind the server to a Unix-domain socket (user client access)
282 CtdlRegisterServiceHook(0,
284 citproto_begin_session,
290 * Bind the server to a Unix-domain socket (admin client access)
292 CtdlRegisterServiceHook(0,
293 file_citadel_admin_socket,
294 citproto_begin_admin_session,
298 chmod(file_citadel_admin_socket, S_IRWXU); /* for your eyes only */
301 * Bind the server to our favorite TCP port (usually 504).
303 CtdlRegisterServiceHook(CtdlGetConfigInt("c_port_number"),
305 citproto_begin_session,
314 * Load any server-side extensions available here.
316 syslog(LOG_INFO, "main: initializing server extensions");
318 initialise_modules(0);
321 * If we need host auth, start our chkpwd daemon.
323 if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_HOST) {
324 start_chkpwd_daemon();
328 * check, whether we're fired up another time after a crash.
329 * if, post an aide message, so the admin has a chance to react.
334 * Now that we've bound the sockets, change to the Citadel user id and its
335 * corresponding group ids
337 if (drop_root_perms) {
338 cdb_chmod_data(); /* make sure we own our data files */
340 #ifdef HAVE_GETPWUID_R
341 #ifdef SOLARIS_GETPWUID
342 pwp = getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf));
343 #else // SOLARIS_GETPWUID
344 getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
345 #endif // SOLARIS_GETPWUID
346 #else // HAVE_GETPWUID_R
348 #endif // HAVE_GETPWUID_R
351 syslog(LOG_ERR, "main: WARNING, getpwuid(%ld): %m Group IDs will be incorrect.", (long)CTDLUID);
353 initgroups(pw.pw_name, pw.pw_gid);
354 if (setgid(pw.pw_gid))
355 syslog(LOG_ERR, "main: setgid(%ld): %m", (long)pw.pw_gid);
357 syslog(LOG_INFO, "main: changing uid to %ld", (long)CTDLUID);
358 if (setuid(CTDLUID) != 0) {
359 syslog(LOG_ERR, "main: setuid() failed: %m");
361 #if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
362 prctl(PR_SET_DUMPABLE, 1);
366 /* We want to check for idle sessions once per minute */
367 CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER, PRIO_CLEANUP + 1);
371 int exit_code = master_cleanup(exit_signal);