+++ /dev/null
-// citserver's main() function lives here.
-//
-// Copyright (c) 1987-2022 by the citadel.org team
-//
-// This program is open source software; you can redistribute it and/or modify
-// it under the terms of the GNU General Public License version 3.
-//
-// This program is distributed in the hope that it will be useful,
-// but WITHOUT ANY WARRANTY; without even the implied warranty of
-// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-// GNU General Public License for more details.
-
-#include <stdlib.h>
-#include <unistd.h>
-#include <stdio.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <grp.h>
-#include <sys/file.h>
-#include <libcitadel.h>
-#include "citserver.h"
-#include "svn_revision.h"
-#include "modules_init.h"
-#include "config.h"
-#include "control.h"
-#include "serv_extensions.h"
-#include "citadel_dirs.h"
-#include "user_ops.h"
-
-uid_t ctdluid = 0;
-const char *CitadelServiceUDS="citadel-UDS";
-const char *CitadelServiceTCP="citadel-TCP";
-int sanity_diag_mode = 0;
-
-
-// Create or remove a lock file, so we only have one Citadel Server running at a time.
-// Set 'op' to nonzero to lock, zero to unlock.
-void ctdl_lockfile(int op) {
- static char lockfilename[PATH_MAX];
- static FILE *fp;
-
- if (op) {
- syslog(LOG_DEBUG, "main: creating lockfile");
- snprintf(lockfilename, sizeof lockfilename, "%s/citadel.lock", ctdl_run_dir);
- fp = fopen(lockfilename, "w");
- if (!fp) {
- syslog(LOG_ERR, "%s: %m", lockfilename);
- exit(CTDLEXIT_DB);
- }
- if (flock(fileno(fp), (LOCK_EX|LOCK_NB)) != 0) {
- syslog(LOG_ERR, "main: cannot lock %s , is another citserver running?", lockfilename);
- exit(CTDLEXIT_DB);
- }
- return;
- }
-
- syslog(LOG_DEBUG, "main: removing lockfile");
- unlink(lockfilename);
- flock(fileno(fp), LOCK_UN);
- fclose(fp);
-}
-
-
-// Here's where it all begins.
-int main(int argc, char **argv) {
-
- char facility[32];
- int a; // General-purpose variables
- struct passwd pw, *pwp = NULL;
- char pwbuf[SIZ];
- int drop_root_perms = 1;
- int max_log_level = LOG_INFO;
- char *ctdldir = CTDLDIR;
- int syslog_facility = LOG_DAEMON;
- uid_t u = 0;
- struct passwd *p = NULL;
-#ifdef HAVE_RUN_DIR
- struct stat filestats;
-#endif
-
- // Tell 'em who's in da house
- syslog(LOG_INFO, " ");
- syslog(LOG_INFO, " ");
- syslog(LOG_INFO, "*** Citadel server engine ***\n");
- syslog(LOG_INFO, "Version %d (build %s) ***", REV_LEVEL, svn_revision());
- syslog(LOG_INFO, "Copyright (C) 1987-2022 by the Citadel development team.");
- syslog(LOG_INFO, " ");
- syslog(LOG_INFO, "This program is open source software: you can redistribute it and/or");
- syslog(LOG_INFO, "modify it under the terms of the GNU General Public License, version 3.");
- syslog(LOG_INFO, " ");
- syslog(LOG_INFO, "This program is distributed in the hope that it will be useful,");
- syslog(LOG_INFO, "but WITHOUT ANY WARRANTY; without even the implied warranty of");
- syslog(LOG_INFO, "MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the");
- syslog(LOG_INFO, "GNU General Public License for more details.");
- syslog(LOG_INFO, " ");
- syslog(LOG_INFO, "%s", libcitadel_version_string());
-
- // parse command-line arguments
- while ((a=getopt(argc, argv, "cl:dh:x:t:B:Dru:s:")) != EOF) switch(a) {
-
- // test this binary for compatibility and exit
- case 'c':
- fprintf(stderr, "%s: binary compatibility confirmed\n", argv[0]);
- exit(0);
- break;
-
- // identify the desired syslog facility
- case 'l':
- safestrncpy(facility, optarg, sizeof(facility));
- syslog_facility = SyslogFacility(facility);
- break;
-
- // run in the background if -d was specified
- case 'd':
- running_as_daemon = 1;
- break;
-
- // specify the data directory
- case 'h':
- ctdldir = optarg;
- break;
-
- // identify the desired logging severity level
- case 'x':
- max_log_level = atoi(optarg);
- break;
-
- // deprecated
- case 't':
- break;
-
- // deprecated
- case 'B':
- break;
-
- // deprecated
- case 'D':
- break;
-
- // -r tells the server not to drop root permissions.
- // Don't use this unless you know what you're doing.
- case 'r':
- drop_root_perms = 0;
- break;
-
- // -u tells the server what uid to run under...
- case 'u':
- u = atoi(optarg);
- if (u > 0) {
- ctdluid = u;
- }
- else {
- p = getpwnam(optarg);
- if (p) {
- u = p->pw_uid;
- }
- }
- if (u > 0) {
- ctdluid = u;
- }
- break;
-
- // -s tells the server to behave differently during sanity checks
- case 's':
- sanity_diag_mode = atoi(optarg);
- break;
-
- // any other parameter makes it crash and burn
- default:
- fprintf(stderr, "citserver: usage: "
- "citserver "
- "[-l LogFacility] "
- "[-x MaxLogLevel] "
- "[-d] [-r] "
- "[-u user] "
- "[-h HomeDir]\n"
- );
- exit(1);
- }
-
- if (chdir(ctdldir) != 0) {
- syslog(LOG_ERR, "main: unable to change directory to [%s]: %m", ctdldir);
- exit(CTDLEXIT_HOME);
- }
- else {
- syslog(LOG_INFO, "main: running in data directory %s", ctdldir);
- }
-
- if ((ctdluid == 0) && (drop_root_perms == 0)) {
- fprintf(stderr, "citserver: cannot determine user to run as; please specify -r or -u options\n");
- exit(CTDLEXIT_UNUSER);
- }
-
- // Last ditch effort to determine the user name ... if there's a user called "citadel" then use that
- if (ctdluid == 0) {
- p = getpwnam("citadel");
- if (!p) {
- p = getpwnam("bbs");
- }
- if (!p) {
- p = getpwnam("guest");
- }
- if (p) {
- u = p->pw_uid;
- }
- if (u > 0) {
- ctdluid = u;
- }
- }
-
- // initialize the master context
- InitializeMasterCC();
- InitializeMasterTSD();
-
- setlogmask(LOG_UPTO(max_log_level));
- openlog("citserver",
- ( running_as_daemon ? (LOG_PID) : (LOG_PID | LOG_PERROR) ),
- syslog_facility
- );
-
- // daemonize, if we were asked to
- if (running_as_daemon) {
- start_daemon(0);
- drop_root_perms = 1;
- }
-
- if ((mkdir(ctdl_run_dir, 0755) != 0) && (errno != EEXIST)) {
- syslog(LOG_ERR, "main: unable to create run directory [%s]: %m", ctdl_run_dir);
- }
-
- if (chown(ctdl_run_dir, ctdluid, (pwp==NULL)?-1:pw.pw_gid) != 0) {
- syslog(LOG_ERR, "main: unable to set the access rights for [%s]: %m", ctdl_run_dir);
- }
-
- ctdl_lockfile(1);
- init_sysdep(); // Initialize...
- master_startup(); // Do non system dependent startup functions
- check_control(); // Check/sanitize/initialize control record, fix user indexes
- syslog(LOG_INFO, "main: upgrading modules"); // Run any upgrade entry points
- upgrade_modules();
-
- // Load the user for the masterCC or create them if they don't exist
- if (CtdlGetUser(&masterCC.user, "SYS_Citadel")) {
- // User doesn't exist. We can't use create user here as the user number needs to be 0
- strcpy (masterCC.user.fullname, "SYS_Citadel") ;
- CtdlPutUser(&masterCC.user);
- CtdlGetUser(&masterCC.user, "SYS_Citadel"); // Just to be safe
- }
-
- // Bind the server to a Unix-domain socket (user client access)
- CtdlRegisterServiceHook(0,
- file_citadel_socket,
- citproto_begin_session,
- do_command_loop,
- do_async_loop,
- CitadelServiceUDS);
-
- // Bind the server to a Unix-domain socket (admin client access)
- CtdlRegisterServiceHook(0,
- file_citadel_admin_socket,
- citproto_begin_admin_session,
- do_command_loop,
- do_async_loop,
- CitadelServiceUDS);
- chmod(file_citadel_admin_socket, S_IRWXU); // for your eyes only
-
- // Bind the server to our favorite TCP port (usually 504).
- CtdlRegisterServiceHook(CtdlGetConfigInt("c_port_number"),
- NULL,
- citproto_begin_session,
- do_command_loop,
- do_async_loop,
- CitadelServiceTCP);
-
- // Load any server-side extensions available here.
- syslog(LOG_INFO, "main: initializing server extensions");
- initialise_modules(0);
-
- // If we need host auth, start our chkpwd daemon.
- if (CtdlGetConfigInt("c_auth_mode") == AUTHMODE_HOST) {
- start_chkpwd_daemon();
- }
-
- // check, whether we're fired up another time after a crash.
- // if, post an aide message, so the admin has a chance to react.
- checkcrash();
-
- // Now that we've bound the sockets, change to the Citadel user id and its corresponding group ids
- if (drop_root_perms) {
- cdb_chmod_data(); // make sure we own our data files
- getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
- if (pwp == NULL)
- syslog(LOG_ERR, "main: WARNING, getpwuid(%ld): %m Group IDs will be incorrect.", (long)CTDLUID);
- else {
- initgroups(pw.pw_name, pw.pw_gid);
- if (setgid(pw.pw_gid)) {
- syslog(LOG_ERR, "main: setgid(%ld): %m", (long)pw.pw_gid);
- }
- }
- syslog(LOG_INFO, "main: changing uid to %ld", (long)CTDLUID);
- if (setuid(CTDLUID) != 0) {
- syslog(LOG_ERR, "main: setuid() failed: %m");
- }
-#if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
- prctl(PR_SET_DUMPABLE, 1);
-#endif
- }
-
- // We want to check for idle sessions once per minute
- CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER, PRIO_CLEANUP + 1);
-
- // Go into multithreaded mode. When this call exits, the server is stopping.
- go_threading();
-
- // Get ready to shut down the server.
- int exit_code = master_cleanup(exit_signal);
- ctdl_lockfile(0);
- if (restart_server) {
- syslog(LOG_INFO, "main: *** CITADEL SERVER IS RESTARTING ***");
- execv(argv[0], argv);
- }
- return(exit_code);
-}
projects / citadel.git / blobdiff