/*
* citserver's main() function lives here.
*
* $Id: server_main.c 6388 2008-06-16 13:06:14Z davew $
*/
#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.c"
#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";
extern struct CitContext masterCC;
void go_threading(void);
/*
* 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;
size_t size;
int relh=0;
int home=0;
int dbg=0;
char relhome[PATH_MAX]="";
char ctdldir[PATH_MAX]=CTDLDIR;
#ifdef HAVE_RUN_DIR
struct stat filestats;
#endif
#ifdef HAVE_BACKTRACE
eCrashParameters params;
// eCrashSymbolTable symbol_table;
#endif
/* initialise semaphores here. Patch by Matt and davew
* its called here as they are needed by CtdlLogPrintf for thread safety
*/
InitialiseSemaphores();
/* initialize the master context */
InitializeMasterCC();
/* parse command-line arguments */
for (a=1; a<argc; ++a) {
if (!strncmp(argv[a], "-l", 2)) {
safestrncpy(facility, &argv[a][2], sizeof(facility));
syslog_facility = SyslogFacility(facility);
enable_syslog = 1;
}
/* run in the background if -d was specified */
else if (!strcmp(argv[a], "-d")) {
running_as_daemon = 1;
}
/* -x specifies the desired logging level */
else if (!strncmp(argv[a], "-x", 2)) {
verbosity = atoi(&argv[a][2]);
}
else if (!strncmp(argv[a], "-h", 2)) {
relh=argv[a][2]!='/';
if (!relh) safestrncpy(ctdl_home_directory, &argv[a][2],
sizeof ctdl_home_directory);
else
safestrncpy(relhome, &argv[a][2],
sizeof relhome);
home_specified = 1;
home=1;
}
else if (!strncmp(argv[a], "-t", 2)) {
freopen(&argv[a][2], "w", stderr);
}
else if (!strncmp(argv[a], "-D", 2)) {
dbg = 1;
}
/* -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"))
drop_root_perms = 0;
/* any other parameter makes it crash and burn */
else {
CtdlLogPrintf(CTDL_EMERG, "citserver: usage: "
"citserver "
"[-lLogFacility] "
"[-d] [-D] "
" [-tTraceFile]"
" [-xLogLevel] [-hHomeDir]\n");
exit(1);
}
}
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
/* Initialize the syslogger. Yes, we are really using 0 as the
* facility, because we are going to bitwise-OR the facility to
* the severity of each message, allowing us to write to other
* facilities when we need to...
*/
if (enable_syslog) {
openlog("citadel", LOG_NDELAY, 0);
setlogmask(LOG_UPTO(verbosity));
}
/* Tell 'em who's in da house */
CtdlLogPrintf(CTDL_NOTICE, "\n");
CtdlLogPrintf(CTDL_NOTICE, "\n");
CtdlLogPrintf(CTDL_NOTICE,
"*** Citadel server engine v%d.%02d (build %s) ***\n",
(REV_LEVEL/100), (REV_LEVEL%100), svn_revision());
CtdlLogPrintf(CTDL_NOTICE, "Copyright (C) 1987-2008 by the Citadel development team.\n");
CtdlLogPrintf(CTDL_NOTICE, "This program is distributed under the terms of the GNU "
"General Public License.\n");
CtdlLogPrintf(CTDL_NOTICE, "\n");
CtdlLogPrintf(CTDL_DEBUG, "Called as: %s\n", argv[0]);
CtdlLogPrintf(CTDL_INFO, "%s\n", libcitadel_version_string());
/* Load site-specific parameters, and set the ipgm secret */
CtdlLogPrintf(CTDL_INFO, "Loading citadel.config\n");
get_config();
config.c_ipgm_secret = rand();
/* get_control() MUST MUST MUST be called BEFORE the databases are opened!! */
CtdlLogPrintf(CTDL_INFO, "Acquiring control record\n");
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
mkdir(ctdl_run_dir, 0755);
chown(ctdl_run_dir, config.c_ctdluid, (pwp==NULL)?-1:pw.pw_gid);
}
#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
*/
CtdlLogPrintf(CTDL_INFO, "Upgrading modules.\n");
upgrade_modules();
/**
* Load the user for the masterCC or create them if they don't exist
*/
if (getuser(&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") ;
putuser(&masterCC.user);
getuser(&masterCC.user, "SYS_Citadel"); /** Just to be safe */
}
/*
* Bind the server to a Unix-domain socket.
*/
CtdlRegisterServiceHook(0,
file_citadel_socket,
citproto_begin_session,
do_command_loop,
do_async_loop,
CitadelServiceUDS);
/*
* 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.
*/
CtdlLogPrintf(CTDL_INFO, "Initializing server extensions\n");
size = strlen(ctdl_home_directory) + 9;
initialise_modules(0);
/*
* If we need host auth, start our chkpwd daemon.
*/
if (config.c_auth_mode == AUTHMODE_HOST) {
start_chkpwd_daemon();
}
/*
* 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)
CtdlLogPrintf(CTDL_CRIT, "WARNING: getpwuid(%ld): %s\n"
"Group IDs will be incorrect.\n", (long)CTDLUID,
strerror(errno));
else {
initgroups(pw.pw_name, pw.pw_gid);
if (setgid(pw.pw_gid))
CtdlLogPrintf(CTDL_CRIT, "setgid(%ld): %s\n", (long)pw.pw_gid,
strerror(errno));
}
CtdlLogPrintf(CTDL_INFO, "Changing uid to %ld\n", (long)CTDLUID);
if (setuid(CTDLUID) != 0) {
CtdlLogPrintf(CTDL_CRIT, "setuid() failed: %s\n", 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);
go_threading();
master_cleanup(exit_signal);
return(0);
}