X-Git-Url: https://code.citadel.org/?a=blobdiff_plain;f=citadel%2Fserver_main.c;h=9dad4d756ae51602d73882e8ec15acb9752bee5e;hb=b826c3117bb7ddf1386a4811cb2eb47ea4e1097c;hp=bab3ab69f29bc960da866d43e7c5cfd5a1417825;hpb=c409452f51adb3b1a6645334d083487012dd5428;p=citadel.git diff --git a/citadel/server_main.c b/citadel/server_main.c index bab3ab69f..9dad4d756 100644 --- a/citadel/server_main.c +++ b/citadel/server_main.c @@ -1,7 +1,7 @@ /* * citserver's main() function lives here. * - * Copyright (c) 1987-2012 by the citadel.org team + * 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. @@ -11,266 +11,247 @@ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. */ - -#include "sysdep.h" #include #include #include -#include -#include -#include #include #include -#include -#include -#include - -#if TIME_WITH_SYS_TIME -# include -# include -#else -# if HAVE_SYS_TIME_H -# include -# else -# include -# endif -#endif - -#include -#include -#include -#include -#include -#include -#include -#include #include -#include -#ifdef HAVE_SYS_PRCTL_H -#include -#endif +#include #include -#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 -#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 */ 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:")) != 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; + + // 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 + * Load the user for the masterCC or create them if they don't exist */ - check_control(); - - /* - * Run any upgrade entry points - */ - 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 */ } /* @@ -297,68 +278,49 @@ int main(int argc, char **argv) /* * 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); @@ -366,10 +328,17 @@ int main(int argc, char **argv) } /* 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); }