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 int running_as_daemon = 0;
  73
  74 /*
  75  * Here's where it all begins.
  76  */
  77 int main(int argc, char **argv)
  78 {
  79         char facility[32];
  80         int a, i;                       /* General-purpose variables */
  81         struct passwd pw, *pwp = NULL;
  82         char pwbuf[SIZ];
  83         int drop_root_perms = 1;
  84         size_t size;
  85         int relh=0;
  86         int home=0;
  87         char relhome[PATH_MAX]="";
  88         char ctdldir[PATH_MAX]=CTDLDIR;
  89 #ifdef HAVE_RUN_DIR
  90         struct stat filestats;
  91 #endif
  92
  93         /* initialize the master context */
  94         InitializeMasterCC();
  95
  96         /* parse command-line arguments */
  97         for (a=1; a<argc; ++a) {
  98
  99                 if (!strncmp(argv[a], "-l", 2)) {
 100                         safestrncpy(facility, &argv[a][2], sizeof(facility));
 101                         syslog_facility = SyslogFacility(facility);
 102                         enable_syslog = 1;
 103                 }
 104
 105                 /* run in the background if -d was specified */
 106                 else if (!strcmp(argv[a], "-d")) {
 107                         running_as_daemon = 1;
 108                 }
 109
 110                 /* -x specifies the desired logging level */
 111                 else if (!strncmp(argv[a], "-x", 2)) {
 112                         verbosity = atoi(&argv[a][2]);
 113                 }
 114
 115                 else if (!strncmp(argv[a], "-h", 2)) {
 116                         relh=argv[a][2]!='/';
 117                         if (!relh) safestrncpy(ctdl_home_directory, &argv[a][2],
 118                                                                    sizeof ctdl_home_directory);
 119                         else
 120                                 safestrncpy(relhome, &argv[a][2],
 121                                                         sizeof relhome);
 122                         home_specified = 1;
 123                         home=1;
 124                 }
 125
 126                 else if (!strncmp(argv[a], "-t", 2)) {
 127                         freopen(&argv[a][2], "w", stderr);
 128                 }
 129
 130                 else if (!strncmp(argv[a], "-f", 2)) {
 131                         do_defrag = 1;
 132                 }
 133
 134                 /* -r tells the server not to drop root permissions. don't use
 135                  * this unless you know what you're doing. this should be
 136                  * removed in the next release if it proves unnecessary. */
 137                 else if (!strcmp(argv[a], "-r"))
 138                         drop_root_perms = 0;
 139
 140                 /* any other parameter makes it crash and burn */
 141                 else {
 142                         lprintf(CTDL_EMERG,     "citserver: usage: "
 143                                         "citserver "
 144                                         "[-lLogFacility] "
 145                                         "[-d] [-f]"
 146                                         " [-tTraceFile]"
 147                                         " [-xLogLevel] [-hHomeDir]\n");
 148                         exit(1);
 149                 }
 150
 151         }
 152
 153         calc_dirs_n_files(relh, home, relhome, ctdldir);
 154
 155         /* daemonize, if we were asked to */
 156         if (running_as_daemon) {
 157                 start_daemon(0);
 158                 drop_root_perms = 1;
 159         }
 160
 161         /* Initialize the syslogger.  Yes, we are really using 0 as the
 162          * facility, because we are going to bitwise-OR the facility to
 163          * the severity of each message, allowing us to write to other
 164          * facilities when we need to...
 165          */
 166         if (enable_syslog) {
 167                 openlog("citadel", LOG_NDELAY, 0);
 168                 setlogmask(LOG_UPTO(verbosity));
 169         }
 170
 171         /* Tell 'em who's in da house */
 172         lprintf(CTDL_NOTICE, "\n");
 173         lprintf(CTDL_NOTICE, "\n");
 174         lprintf(CTDL_NOTICE,
 175                 "*** Citadel server engine v%d.%02d ***\n",
 176                 (REV_LEVEL/100), (REV_LEVEL%100));
 177         lprintf(CTDL_NOTICE,
 178                 "Copyright (C) 1987-2007 by the Citadel development team.\n");
 179         lprintf(CTDL_NOTICE,
 180                 "This program is distributed under the terms of the GNU "
 181                 "General Public License.\n");
 182         lprintf(CTDL_NOTICE, "\n");
 183         lprintf(CTDL_DEBUG, "Called as: %s\n", argv[0]);
 184
 185         /* Load site-specific parameters, and set the ipgm secret */
 186         lprintf(CTDL_INFO, "Loading citadel.config\n");
 187         get_config();
 188         config.c_ipgm_secret = rand();
 189         put_config();
 190
 191         lprintf(CTDL_INFO, "Acquiring control record\n");
 192         get_control();
 193
 194 #ifdef HAVE_RUN_DIR
 195         /* on some dists rundir gets purged on startup. so we need to recreate it. */
 196
 197         if (stat(ctdl_run_dir, &filestats)==-1){
 198 #ifdef SOLARIS_GETPWUID
 199                 pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
 200 #else
 201                 getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
 202 #endif
 203                 mkdir(ctdl_run_dir, 0755);
 204                 chown(ctdl_run_dir, config.c_ctdluid, (pwp==NULL)?-1:pw.pw_gid);
 205         }
 206
 207
 208 #endif
 209
 210         /* Initialize... */
 211         init_sysdep();
 212
 213         /*
 214          * Do non system dependent startup functions.
 215          */
 216         master_startup();
 217
 218         /*
 219          * Bind the server to a Unix-domain socket.
 220          */
 221         CtdlRegisterServiceHook(0,
 222                                                         file_citadel_socket,
 223                                                         citproto_begin_session,
 224                                                         do_command_loop,
 225                                                         do_async_loop);
 226
 227         /*
 228          * Bind the server to our favorite TCP port (usually 504).
 229          */
 230         CtdlRegisterServiceHook(config.c_port_number,
 231                                 NULL,
 232                                 citproto_begin_session,
 233                                 do_command_loop,
 234                                 do_async_loop);
 235
 236         /*
 237          * Load any server-side extensions available here.
 238          */
 239         lprintf(CTDL_INFO, "Initializing server extensions\n");
 240         size = strlen(ctdl_home_directory) + 9;
 241
 242 /*
 243         initialize_server_extensions();
 244 */
 245
 246         initialise_modules();
 247
 248
 249
 250         /*
 251          * If we need host auth, start our chkpwd daemon.
 252          */
 253         if (config.c_auth_mode == 1) {
 254                 start_chkpwd_daemon();
 255         }
 256
 257         /*
 258          * Now that we've bound the sockets, change to the Citadel user id and its
 259          * corresponding group ids
 260          */
 261         if (drop_root_perms) {
 262                 cdb_chmod_data();       /* make sure we own our data files */
 263
 264 #ifdef SOLARIS_GETPWUID
 265                 pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
 266 #else
 267                 getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
 268 #endif
 269                 if (pwp == NULL)
 270                         lprintf(CTDL_CRIT, "WARNING: getpwuid(%ld): %s\n"
 271                                    "Group IDs will be incorrect.\n", (long)CTDLUID,
 272                                 strerror(errno));
 273                 else {
 274                         initgroups(pw.pw_name, pw.pw_gid);
 275                         if (setgid(pw.pw_gid))
 276                                 lprintf(CTDL_CRIT, "setgid(%ld): %s\n", (long)pw.pw_gid,
 277                                         strerror(errno));
 278                 }
 279                 lprintf(CTDL_INFO, "Changing uid to %ld\n", (long)CTDLUID);
 280                 if (setuid(CTDLUID) != 0) {
 281                         lprintf(CTDL_CRIT, "setuid() failed: %s\n", strerror(errno));
 282                 }
 283 #if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
 284                 prctl(PR_SET_DUMPABLE, 1);
 285 #endif
 286         }
 287
 288         /* We want to check for idle sessions once per minute */
 289         CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER);
 290
 291         /*
 292          * Now create a bunch of worker threads.
 293          */
 294         lprintf(CTDL_DEBUG, "Starting %d worker threads\n",
 295                 config.c_min_workers-1);
 296         begin_critical_section(S_WORKER_LIST);
 297         for (i=0; i<(config.c_min_workers-1); ++i) {
 298                 create_worker();
 299         }
 300         end_critical_section(S_WORKER_LIST);
 301
 302         /* Create the indexer thread. */
 303         create_maintenance_threads();
 304
 305         /* This thread is now useless.  It can't be turned into a worker
 306          * thread because its stack is too small, but it can't be killed
 307          * either because the whole server process would exit.  So we just
 308          * join to the first worker thread and exit when it exits.
 309          */
 310         pthread_join(worker_list->tid, NULL);
 311         master_cleanup(0);
 312         return(0);
 313 }