-/*
- * citserver's main() function lives here.
- *
- * Copyright (c) 1987-2012 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.
- */
+// citserver's main() function lives here.
+//
+// Copyright (c) 1987-2021 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 "sysdep.h"
#include <stdlib.h>
#include <unistd.h>
#include <stdio.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <signal.h>
#include <sys/types.h>
#include <sys/stat.h>
-#include <sys/wait.h>
-#include <sys/socket.h>
-#include <syslog.h>
-
-#if TIME_WITH_SYS_TIME
-# include <sys/time.h>
-# include <time.h>
-#else
-# if HAVE_SYS_TIME_H
-# include <sys/time.h>
-# else
-# include <time.h>
-# endif
-#endif
-
-#include <limits.h>
-#include <netinet/in.h>
-#include <netdb.h>
-#include <sys/un.h>
-#include <string.h>
-#include <pwd.h>
-#include <errno.h>
-#include <stdarg.h>
#include <grp.h>
-#include <pwd.h>
-#ifdef HAVE_SYS_PRCTL_H
-#include <sys/prctl.h>
-#endif
+#include <sys/file.h>
#include <libcitadel.h>
-#include "citadel.h"
-#include "server.h"
-#include "serv_extensions.h"
-#include "sysdep_decls.h"
-#include "threads.h"
#include "citserver.h"
-#include "support.h"
+#include "svn_revision.h"
+#include "modules_init.h"
#include "config.h"
#include "control.h"
-#include "database.h"
-#include "user_ops.h"
-#include "housekeeping.h"
-#include "svn_revision.h"
+#include "serv_extensions.h"
#include "citadel_dirs.h"
+#include "user_ops.h"
-#include "context.h"
-
-#include "modules_init.h"
-#include "ecrash.h"
-
-#ifdef HAVE_SYS_SELECT_H
-#include <sys/select.h>
-#endif
-
-#ifndef HAVE_SNPRINTF
-#include "snprintf.h"
-#endif
+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);
+}
-void go_threading(void);
/*
* Here's where it all begins.
*/
-int main(int argc, char **argv)
-{
+int main(int argc, char **argv) {
+
char facility[32];
- int a; /* General-purpose variables */
+ int a; // General-purpose variables
struct passwd pw, *pwp = NULL;
char pwbuf[SIZ];
int drop_root_perms = 1;
- int relh=0;
- int home=0;
- int dbg=0;
- char relhome[PATH_MAX]="";
- char ctdldir[PATH_MAX]=CTDLDIR;
+ 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
-#ifdef HAVE_BACKTRACE
- eCrashParameters params;
-// eCrashSymbolTable symbol_table;
#endif
- /* initialize the master context */
- InitializeMasterCC();
- InitializeMasterTSD();
+ /* 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) 1987-2021 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, "l:dh:x:t:Dr")) != EOF) switch(a) {
+ while ((a=getopt(argc, argv, "cl:dh:x:t:B:Dru:s:b:")) != 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 */
+ // run in the background if -d was specified
case 'd':
running_as_daemon = 1;
break;
+ // specify the data directory
case 'h':
- relh = optarg[0] != '/';
- if (!relh) {
- safestrncpy(ctdl_home_directory, optarg, sizeof ctdl_home_directory);
- }
- else {
- safestrncpy(relhome, optarg, sizeof relhome);
- }
- home=1;
+ ctdldir = optarg;
break;
- case 'x': /* deprecated */
+ // identify the desired logging severity level
+ case 'x':
+ max_log_level = atoi(optarg);
break;
- case 't': /* deprecated */
+ // deprecated
+ case 't':
break;
+ // deprecated
+ case 'B':
+ break;
+
+ // deprecated
case 'D':
- dbg = 1;
break;
- /* -r tells the server not to drop root permissions.
- * Don't use this unless you know what you're doing.
- */
+ // -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;
+
+ case 'b':
+ backtrace_filename = strdup(optarg);
+ break;
+
+ // any other parameter makes it crash and burn
default:
- /* any other parameter makes it crash and burn */
fprintf(stderr, "citserver: usage: "
"citserver "
"[-l LogFacility] "
- "[-d] [-D] [-r] "
+ "[-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
);
- calc_dirs_n_files(relh, home, relhome, ctdldir, dbg);
/* daemonize, if we were asked to */
if (running_as_daemon) {
start_daemon(0);
drop_root_perms = 1;
}
-#ifdef HAVE_BACKTRACE
- bzero(¶ms, sizeof(params));
- params.filename = file_pid_paniclog;
- panic_fd=open(file_pid_paniclog, O_APPEND|O_CREAT|O_DIRECT);
- params.filep = fopen(file_pid_paniclog, "a+");
- params.debugLevel = ECRASH_DEBUG_VERBOSE;
- params.dumpAllThreads = TRUE;
- params.useBacktraceSymbols = 1;
- params.signals[0]=SIGSEGV;
- params.signals[1]=SIGILL;
- params.signals[2]=SIGBUS;
- params.signals[3]=SIGABRT;
- eCrash_Init(¶ms);
- eCrash_RegisterThread("MasterThread", 0);
-#endif
-
- /* Tell 'em who's in da house */
- syslog(LOG_NOTICE, " ");
- syslog(LOG_NOTICE, " ");
- syslog(LOG_NOTICE,
- "*** Citadel server engine v%d.%02d (build %s) ***",
- (REV_LEVEL/100), (REV_LEVEL%100), svn_revision());
- syslog(LOG_NOTICE, "Copyright (C) 1987-2012 by the Citadel development team.");
- syslog(LOG_NOTICE, "This program is distributed under the terms of the GNU "
- "General Public License.");
- syslog(LOG_NOTICE, " ");
- syslog(LOG_DEBUG, "Called as: %s", argv[0]);
- syslog(LOG_INFO, "%s", libcitadel_version_string());
-
- /* Load site-specific configuration */
- syslog(LOG_INFO, "Loading citadel.config");
- get_config();
-
- /* get_control() MUST MUST MUST be called BEFORE the databases are opened!! */
- syslog(LOG_INFO, "Acquiring control record");
- get_control();
-
- put_config();
-
-#ifdef HAVE_RUN_DIR
- /* on some dists rundir gets purged on startup. so we need to recreate it. */
-
- if (stat(ctdl_run_dir, &filestats)==-1){
-#ifdef HAVE_GETPWUID_R
-#ifdef SOLARIS_GETPWUID
- pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
-#else // SOLARIS_GETPWUID
- getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
-#endif // SOLARIS_GETPWUID
-#else // HAVE_GETPWUID_R
- pwp = NULL;
-#endif // HAVE_GETPWUID_R
-
- if ((mkdir(ctdl_run_dir, 0755) != 0) && (errno != EEXIST))
- syslog(LOG_EMERG,
- "unable to create run directory [%s]: %s",
- ctdl_run_dir, strerror(errno));
-
- if (chown(ctdl_run_dir, config.c_ctdluid, (pwp==NULL)?-1:pw.pw_gid) != 0)
- syslog(LOG_EMERG,
- "unable to set the access rights for [%s]: %s",
- ctdl_run_dir, strerror(errno));
+ if ((mkdir(ctdl_run_dir, 0755) != 0) && (errno != EEXIST)) {
+ syslog(LOG_ERR, "main: unable to create run directory [%s]: %m", ctdl_run_dir);
}
-
-
-#endif
- /* Initialize... */
- init_sysdep();
+ 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);
+ }
- /*
- * Do non system dependent startup functions.
- */
- master_startup();
+ 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();
/*
- * Check that the control record is correct and place sensible values if it isn't
- */
- check_control();
-
- /*
- * Run any upgrade entry points
+ * Load the user for the masterCC or create them if they don't exist
*/
- syslog(LOG_INFO, "Upgrading modules.");
- upgrade_modules();
-
-/*
- * Load the user for the masterCC or create them if they don't exist
- */
- if (CtdlGetUser(&masterCC.user, "SYS_Citadel"))
- {
+ 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 */
+ CtdlGetUser(&masterCC.user, "SYS_Citadel"); /* Just to be safe */
}
/*
/*
* Bind the server to our favorite TCP port (usually 504).
*/
- CtdlRegisterServiceHook(config.c_port_number,
+ 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, "Initializing server extensions");
-
+ syslog(LOG_INFO, "main: initializing server extensions");
initialise_modules(0);
/*
* If we need host auth, start our chkpwd daemon.
*/
- if (config.c_auth_mode == AUTHMODE_HOST) {
+ 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 ();
-
+ checkcrash();
/*
- * Now that we've bound the sockets, change to the Citadel user id and its
- * corresponding group ids
+ * 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 */
-
-#ifdef HAVE_GETPWUID_R
-#ifdef SOLARIS_GETPWUID
- pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
-#else // SOLARIS_GETPWUID
- getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
-#endif // SOLARIS_GETPWUID
-#else // HAVE_GETPWUID_R
- pwp = NULL;
-#endif // HAVE_GETPWUID_R
-
+ getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
if (pwp == NULL)
- syslog(LOG_CRIT, "WARNING: getpwuid(%ld): %s"
- "Group IDs will be incorrect.\n", (long)CTDLUID,
- strerror(errno));
+ 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_CRIT, "setgid(%ld): %s", (long)pw.pw_gid,
- strerror(errno));
+ if (setgid(pw.pw_gid)) {
+ syslog(LOG_ERR, "main: setgid(%ld): %m", (long)pw.pw_gid);
+ }
}
- syslog(LOG_INFO, "Changing uid to %ld", (long)CTDLUID);
+ syslog(LOG_INFO, "main: changing uid to %ld", (long)CTDLUID);
if (setuid(CTDLUID) != 0) {
- syslog(LOG_CRIT, "setuid() failed: %s", strerror(errno));
+ syslog(LOG_ERR, "main: setuid() failed: %m");
}
#if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
prctl(PR_SET_DUMPABLE, 1);
}
/* We want to check for idle sessions once per minute */
- CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER);
+ CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER, PRIO_CLEANUP + 1);
+ /* Go into multithreaded mode. When this call exits, the server is stopping. */
go_threading();
- master_cleanup(exit_signal);
- return(0);
+ /* 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