/*
* citserver's main() function lives here.
*
- * Copyright (c) 1987-2012 by the citadel.org team
+ * Copyright (c) 1987-2017 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.
* 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 "context.h"
-
-#include "modules_init.h"
+#include "user_ops.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";
+void go_threading(void);
+
+/*
+ * Create or remove a lock file, so we only have one Citadel Server running at a time.
+ */
+void ctdl_lockfile(int yo) {
+ static char lockfilename[SIZ];
+ static FILE *fp;
+
+ if (yo) {
+ 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)
{
+ size_t basesize = 64;
char facility[32];
int a; /* General-purpose variables */
struct passwd pw, *pwp = NULL;
int relh=0;
int home=0;
int dbg=0;
+ int max_log_level = LOG_INFO;
char relhome[PATH_MAX]="";
char ctdldir[PATH_MAX]=CTDLDIR;
int syslog_facility = LOG_DAEMON;
+ uid_t u = 0;
+ struct passwd *p = NULL;
#ifdef HAVE_RUN_DIR
struct stat filestats;
#endif
InitializeMasterTSD();
/* parse command-line arguments */
- for (a=1; a<argc; ++a) {
+ while ((a=getopt(argc, argv, "l:dh:x:t:B:Dru:")) != EOF) switch(a) {
- if (!strncmp(argv[a], "-l", 2)) {
- safestrncpy(facility, &argv[a][2], sizeof(facility));
+ case 'l':
+ safestrncpy(facility, optarg, sizeof(facility));
syslog_facility = SyslogFacility(facility);
- }
+ break;
/* run in the background if -d was specified */
- else if (!strcmp(argv[a], "-d")) {
+ case 'd':
running_as_daemon = 1;
- }
+ break;
- else if (!strncmp(argv[a], "-h", 2)) {
- relh=argv[a][2]!='/';
+ case 'h':
+ relh = optarg[0] != '/';
if (!relh) {
- safestrncpy(ctdl_home_directory, &argv[a][2], sizeof ctdl_home_directory);
+ safestrncpy(ctdl_home_directory, optarg, sizeof ctdl_home_directory);
}
else {
- safestrncpy(relhome, &argv[a][2], sizeof relhome);
+ safestrncpy(relhome, optarg, sizeof relhome);
}
home=1;
- }
+ break;
- else if (!strncmp(argv[a], "-x", 2)) {
- /* deprecated */
- }
+ case 'x':
+ max_log_level = atoi(optarg);
+ break;
- else if (!strncmp(argv[a], "-t", 2)) {
- /* deprecated */
- }
+ case 't': /* deprecated */
+ break;
+ case 'B': /* Basesize */
+ basesize = atoi(optarg);
+ break;
- else if (!strncmp(argv[a], "-D", 2)) {
+ 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. this should be
- * removed in the next release if it proves unnecessary. */
- else if (!strcmp(argv[a], "-r")) {
+ /* -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;
+ default:
/* any other parameter makes it crash and burn */
- else {
fprintf(stderr, "citserver: usage: "
"citserver "
- "[-lLogFacility] "
- "[-d] [-D] [-s] "
- "[-hHomeDir]\n"
+ "[-l LogFacility] "
+ "[-x MaxLogLevel] "
+ "[-d] [-D] [-r] "
+ "[-u user] "
+ "[-h HomeDir]\n"
);
exit(1);
+ }
+
+ /* 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;
+ }
+ }
+ 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);
}
+ StartLibCitadel(basesize);
+ setlogmask(LOG_UPTO(max_log_level));
openlog("citserver",
( running_as_daemon ? (LOG_PID) : (LOG_PID | LOG_PERROR) ),
syslog_facility
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, " ");
+ 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) 1987-2017 by the Citadel development team.");
+ syslog(LOG_INFO, "This program is distributed under the terms of the GNU General Public License.");
+ syslog(LOG_INFO, " ");
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));
+ pwp = getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf));
#else // SOLARIS_GETPWUID
- getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
+ getpwuid_r(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 ((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, 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 (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);
+ }
}
-
-
#endif
+ ctdl_lockfile(1);
+
/* Initialize... */
init_sysdep();
/*
* Run any upgrade entry points
*/
- syslog(LOG_INFO, "Upgrading modules.");
+ syslog(LOG_INFO, "main: upgrading modules");
upgrade_modules();
/*
/*
* 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,
/*
* 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();
}
#ifdef HAVE_GETPWUID_R
#ifdef SOLARIS_GETPWUID
- pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
+ pwp = getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf));
#else // SOLARIS_GETPWUID
- getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
+ getpwuid_r(ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
#endif // SOLARIS_GETPWUID
#else // HAVE_GETPWUID_R
pwp = NULL;
#endif // HAVE_GETPWUID_R
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));
+ 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_threading();
- master_cleanup(exit_signal);
- return(0);
+ int exit_code = master_cleanup(exit_signal);
+ ctdl_lockfile(0);
+ return(exit_code);
}