/*
* 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.
*/
#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 <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 "config.h"
#include "control.h"
#include "database.h"
#include "user_ops.h"
#include "housekeeping.h"
#include "svn_revision.h"
#include "citadel_dirs.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
const char *CitadelServiceUDS="citadel-UDS";
const char *CitadelServiceTCP="citadel-TCP";
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;
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 syslog_facility = LOG_DAEMON;
const char *eDebuglist[] = {NULL, NULL};
#ifdef HAVE_RUN_DIR
struct stat filestats;
#endif
#ifdef HAVE_BACKTRACE
eCrashParameters params;
// eCrashSymbolTable symbol_table;
#endif
/* initialize the master context */
InitializeMasterCC();
InitializeMasterTSD();
/* parse command-line arguments */
while ((a=getopt(argc, argv, "l:dh:x:t:B:Dr")) != EOF) switch(a) {
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;
case 'h':
relh = optarg[0] != '/';
if (!relh) {
safestrncpy(ctdl_home_directory, optarg, sizeof ctdl_home_directory);
}
else {
safestrncpy(relhome, optarg, sizeof relhome);
}
home=1;
break;
case 'x':
eDebuglist [0] = optarg;
break;
case 't': /* deprecated */
break;
case 'B': /* Basesize */
basesize = atoi(optarg);
break;
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.
*/
case 'r':
drop_root_perms = 0;
break;
default:
/* any other parameter makes it crash and burn */
fprintf(stderr, "citserver: usage: "
"citserver "
"[-l LogFacility] "
"[-d] [-D] [-r] "
"[-h HomeDir]\n"
);
exit(1);
}
StartLibCitadel(basesize);
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) 1987-2013 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));
}
#endif
/* Initialize... */
init_sysdep();
/*
* Do non system dependent startup functions.
*/
master_startup();
/*
* Check that the control record is correct and place sensible values if it isn't
*/
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"))
{
/* 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(config.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");
initialise_modules(0);
eDebuglist[1] = getenv("CITADEL_LOGDEBUG");
CtdlSetDebugLogFacilities(eDebuglist, 2);
/*
* If we need host auth, start our chkpwd daemon.
*/
if (config.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 */
#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 (pwp == NULL)
syslog(LOG_CRIT, "WARNING: getpwuid(%ld): %s"
"Group IDs will be incorrect.\n", (long)CTDLUID,
strerror(errno));
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_INFO, "Changing uid to %ld", (long)CTDLUID);
if (setuid(CTDLUID) != 0) {
syslog(LOG_CRIT, "setuid() failed: %s", strerror(errno));
}
#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_threading();
master_cleanup(exit_signal);
return(0);
}