citadel/server_main.c

   1 /*
   2  * citserver's main() function lives here.
   3  *
   4  * $Id$
   5  */
   6
   7 #include "sysdep.h"
   8 #include <stdlib.h>
   9 #include <unistd.h>
  10 #include <stdio.h>
  11 #include <fcntl.h>
  12 #include <ctype.h>
  13 #include <signal.h>
  14 #include <sys/types.h>
  15 #include <sys/stat.h>
  16 #include <sys/wait.h>
  17 #include <sys/socket.h>
  18 #include <syslog.h>
  19
  20 #if TIME_WITH_SYS_TIME
  21 # include <sys/time.h>
  22 # include <time.h>
  23 #else
  24 # if HAVE_SYS_TIME_H
  25 #  include <sys/time.h>
  26 # else
  27 #  include <time.h>
  28 # endif
  29 #endif
  30
  31 #include <limits.h>
  32 #include <netinet/in.h>
  33 #include <netdb.h>
  34 #include <sys/un.h>
  35 #include <string.h>
  36 #include <pwd.h>
  37 #include <errno.h>
  38 #include <stdarg.h>
  39 #include <grp.h>
  40 #include <pwd.h>
  41 #ifdef HAVE_PTHREAD_H
  42 #include <pthread.h>
  43 #endif
  44 #ifdef HAVE_SYS_PRCTL_H
  45 #include <sys/prctl.h>
  46 #endif
  47 #include "citadel.h"
  48 #include "server.h"
  49 #include "serv_extensions.h"
  50 #include "sysdep_decls.h"
  51 #include "citserver.h"
  52 #include "support.h"
  53 #include "config.h"
  54 #include "control.h"
  55 #include "database.h"
  56 #include "user_ops.h"
  57 #include "housekeeping.h"
  58 #include "tools.h"
  59 #include "citadel_dirs.c"
  60
  61 #include "modules_init.h"
  62
  63
  64 #ifdef HAVE_SYS_SELECT_H
  65 #include <sys/select.h>
  66 #endif
  67
  68 #ifndef HAVE_SNPRINTF
  69 #include "snprintf.h"
  70 #endif
  71
  72 /*
  73  * Here's where it all begins.
  74  */
  75 int main(int argc, char **argv)
  76 {
  77         char facility[32];
  78         int a, i;                       /* General-purpose variables */
  79         struct passwd pw, *pwp = NULL;
  80         char pwbuf[SIZ];
  81         int drop_root_perms = 1;
  82         size_t size;
  83         int relh=0;
  84         int home=0;
  85         char relhome[PATH_MAX]="";
  86         char ctdldir[PATH_MAX]=CTDLDIR;
  87 #ifdef HAVE_RUN_DIR
  88         struct stat filestats;
  89 #endif
  90
  91         /* initialize the master context */
  92         InitializeMasterCC();
  93
  94         /* parse command-line arguments */
  95         for (a=1; a<argc; ++a) {
  96
  97                 if (!strncmp(argv[a], "-l", 2)) {
  98                         safestrncpy(facility, &argv[a][2], sizeof(facility));
  99                         syslog_facility = SyslogFacility(facility);
 100                         enable_syslog = 1;
 101                 }
 102
 103                 /* run in the background if -d was specified */
 104                 else if (!strcmp(argv[a], "-d")) {
 105                         running_as_daemon = 1;
 106                 }
 107
 108                 /* -x specifies the desired logging level */
 109                 else if (!strncmp(argv[a], "-x", 2)) {
 110                         verbosity = atoi(&argv[a][2]);
 111                 }
 112
 113                 else if (!strncmp(argv[a], "-h", 2)) {
 114                         relh=argv[a][2]!='/';
 115                         if (!relh) safestrncpy(ctdl_home_directory, &argv[a][2],
 116                                                                    sizeof ctdl_home_directory);
 117                         else
 118                                 safestrncpy(relhome, &argv[a][2],
 119                                                         sizeof relhome);
 120                         home_specified = 1;
 121                         home=1;
 122                 }
 123
 124                 else if (!strncmp(argv[a], "-t", 2)) {
 125                         freopen(&argv[a][2], "w", stderr);
 126                 }
 127
 128                 else if (!strncmp(argv[a], "-f", 2)) {
 129                         do_defrag = 1;
 130                 }
 131
 132                 /* -r tells the server not to drop root permissions. don't use
 133                  * this unless you know what you're doing. this should be
 134                  * removed in the next release if it proves unnecessary. */
 135                 else if (!strcmp(argv[a], "-r"))
 136                         drop_root_perms = 0;
 137
 138                 /* any other parameter makes it crash and burn */
 139                 else {
 140                         lprintf(CTDL_EMERG,     "citserver: usage: "
 141                                         "citserver "
 142                                         "[-lLogFacility] "
 143                                         "[-d] [-f]"
 144                                         " [-tTraceFile]"
 145                                         " [-xLogLevel] [-hHomeDir]\n");
 146                         exit(1);
 147                 }
 148
 149         }
 150
 151         calc_dirs_n_files(relh, home, relhome, ctdldir);
 152
 153         /* daemonize, if we were asked to */
 154         if (running_as_daemon) {
 155                 start_daemon(0);
 156                 drop_root_perms = 1;
 157         }
 158
 159         /* Initialize the syslogger.  Yes, we are really using 0 as the
 160          * facility, because we are going to bitwise-OR the facility to
 161          * the severity of each message, allowing us to write to other
 162          * facilities when we need to...
 163          */
 164         if (enable_syslog) {
 165                 openlog("citadel", LOG_NDELAY, 0);
 166                 setlogmask(LOG_UPTO(verbosity));
 167         }
 168
 169         /* Tell 'em who's in da house */
 170         lprintf(CTDL_NOTICE, "\n");
 171         lprintf(CTDL_NOTICE, "\n");
 172         lprintf(CTDL_NOTICE,
 173                 "*** Citadel server engine v%d.%02d ***\n",
 174                 (REV_LEVEL/100), (REV_LEVEL%100));
 175         lprintf(CTDL_NOTICE,
 176                 "Copyright (C) 1987-2007 by the Citadel development team.\n");
 177         lprintf(CTDL_NOTICE,
 178                 "This program is distributed under the terms of the GNU "
 179                 "General Public License.\n");
 180         lprintf(CTDL_NOTICE, "\n");
 181         lprintf(CTDL_DEBUG, "Called as: %s\n", argv[0]);
 182
 183         /* Load site-specific parameters, and set the ipgm secret */
 184         lprintf(CTDL_INFO, "Loading citadel.config\n");
 185         get_config();
 186         config.c_ipgm_secret = rand();
 187         put_config();
 188
 189         lprintf(CTDL_INFO, "Acquiring control record\n");
 190         get_control();
 191
 192 #ifdef HAVE_RUN_DIR
 193         /* on some dists rundir gets purged on startup. so we need to recreate it. */
 194
 195         if (stat(ctdl_run_dir, &filestats)==-1){
 196 #ifdef SOLARIS_GETPWUID
 197                 pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
 198 #else
 199                 getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
 200 #endif
 201                 mkdir(ctdl_run_dir, 0755);
 202                 chown(ctdl_run_dir, config.c_ctdluid, (pwp==NULL)?-1:pw.pw_gid);
 203         }
 204
 205
 206 #endif
 207
 208         /* Initialize... */
 209         init_sysdep();
 210
 211         /*
 212          * Do non system dependent startup functions.
 213          */
 214         master_startup();
 215
 216         /*
 217          * Bind the server to a Unix-domain socket.
 218          */
 219         CtdlRegisterServiceHook(0,
 220                                                         file_citadel_socket,
 221                                                         citproto_begin_session,
 222                                                         do_command_loop,
 223                                                         do_async_loop);
 224
 225         /*
 226          * Bind the server to our favorite TCP port (usually 504).
 227          */
 228         CtdlRegisterServiceHook(config.c_port_number,
 229                                 NULL,
 230                                 citproto_begin_session,
 231                                 do_command_loop,
 232                                 do_async_loop);
 233
 234         /*
 235          * Load any server-side extensions available here.
 236          */
 237         lprintf(CTDL_INFO, "Initializing server extensions\n");
 238         size = strlen(ctdl_home_directory) + 9;
 239
 240 /*
 241         initialize_server_extensions();
 242 */
 243
 244         initialise_modules();
 245
 246
 247
 248         /*
 249          * If we need host auth, start our chkpwd daemon.
 250          */
 251         if (config.c_auth_mode == 1) {
 252                 start_chkpwd_daemon();
 253         }
 254
 255         /*
 256          * Now that we've bound the sockets, change to the Citadel user id and its
 257          * corresponding group ids
 258          */
 259         if (drop_root_perms) {
 260                 cdb_chmod_data();       /* make sure we own our data files */
 261
 262 #ifdef SOLARIS_GETPWUID
 263                 pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
 264 #else
 265                 getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
 266 #endif
 267                 if (pwp == NULL)
 268                         lprintf(CTDL_CRIT, "WARNING: getpwuid(%ld): %s\n"
 269                                    "Group IDs will be incorrect.\n", (long)CTDLUID,
 270                                 strerror(errno));
 271                 else {
 272                         initgroups(pw.pw_name, pw.pw_gid);
 273                         if (setgid(pw.pw_gid))
 274                                 lprintf(CTDL_CRIT, "setgid(%ld): %s\n", (long)pw.pw_gid,
 275                                         strerror(errno));
 276                 }
 277                 lprintf(CTDL_INFO, "Changing uid to %ld\n", (long)CTDLUID);
 278                 if (setuid(CTDLUID) != 0) {
 279                         lprintf(CTDL_CRIT, "setuid() failed: %s\n", strerror(errno));
 280                 }
 281 #if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
 282                 prctl(PR_SET_DUMPABLE, 1);
 283 #endif
 284         }
 285
 286         /* We want to check for idle sessions once per minute */
 287         CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER);
 288
 289         /*
 290          * Now create a bunch of worker threads.
 291          */
 292         lprintf(CTDL_DEBUG, "Starting %d worker threads\n",
 293                 config.c_min_workers-1);
 294         begin_critical_section(S_WORKER_LIST);
 295         for (i=0; i<(config.c_min_workers-1); ++i) {
 296                 create_worker();
 297         }
 298         end_critical_section(S_WORKER_LIST);
 299
 300         /* Create the indexer thread. */
 301         create_maintenance_threads();
 302
 303         /* This thread is now useless.  It can't be turned into a worker
 304          * thread because its stack is too small, but it can't be killed
 305          * either because the whole server process would exit.  So we just
 306          * join to the first worker thread and exit when it exits.
 307          */
 308         pthread_join(worker_list->tid, NULL);
 309         master_cleanup(0);
 310         return(0);
 311 }