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_SYS_PRCTL_H
  42 #include <sys/prctl.h>
  43 #endif
  44 #include <libcitadel.h>
  45 #include "citadel.h"
  46 #include "server.h"
  47 #include "serv_extensions.h"
  48 #include "sysdep_decls.h"
  49 #include "threads.h"
  50 #include "citserver.h"
  51 #include "support.h"
  52 #include "config.h"
  53 #include "control.h"
  54 #include "database.h"
  55 #include "user_ops.h"
  56 #include "housekeeping.h"
  57 #include "citadel_dirs.c"
  58
  59 #include "modules_init.h"
  60 #include "ecrash.h"
  61
  62 #ifdef HAVE_SYS_SELECT_H
  63 #include <sys/select.h>
  64 #endif
  65
  66 #ifndef HAVE_SNPRINTF
  67 #include "snprintf.h"
  68 #endif
  69 const char *CitadelServiceUDS="citadel-UDS";
  70 const char *CitadelServiceTCP="citadel-TCP";
  71
  72
  73 void go_threading(void);
  74
  75
  76 /*
  77  * Here's where it all begins.
  78  */
  79 int main(int argc, char **argv)
  80 {
  81         char facility[32];
  82         int a;                  /* General-purpose variables */
  83         struct passwd pw, *pwp = NULL;
  84         char pwbuf[SIZ];
  85         int drop_root_perms = 1;
  86         size_t size;
  87         int relh=0;
  88         int home=0;
  89         int dbg=0;
  90         char relhome[PATH_MAX]="";
  91         char ctdldir[PATH_MAX]=CTDLDIR;
  92 #ifdef HAVE_RUN_DIR
  93         struct stat filestats;
  94 #endif
  95 #ifdef HAVE_BACKTRACE
  96         eCrashParameters params;
  97 //      eCrashSymbolTable symbol_table;
  98 #endif
  99         /* initialise semaphores here. Patch by Matt and davew
 100          * its called here as they are needed by CtdlLogPrintf for thread safety
 101          */
 102         CtdlInitBase64Table();
 103         InitialiseSemaphores();
 104
 105         /* initialize the master context */
 106         InitializeMasterCC();
 107
 108         /* parse command-line arguments */
 109         for (a=1; a<argc; ++a) {
 110
 111                 if (!strncmp(argv[a], "-l", 2)) {
 112                         safestrncpy(facility, &argv[a][2], sizeof(facility));
 113                         syslog_facility = SyslogFacility(facility);
 114                         enable_syslog = 1;
 115                 }
 116
 117                 /* run in the background if -d was specified */
 118                 else if (!strcmp(argv[a], "-d")) {
 119                         running_as_daemon = 1;
 120                 }
 121
 122                 /* -x specifies the desired logging level */
 123                 else if (!strncmp(argv[a], "-x", 2)) {
 124                         verbosity = atoi(&argv[a][2]);
 125                 }
 126
 127                 else if (!strncmp(argv[a], "-h", 2)) {
 128                         relh=argv[a][2]!='/';
 129                         if (!relh) safestrncpy(ctdl_home_directory, &argv[a][2],
 130                                                                    sizeof ctdl_home_directory);
 131                         else
 132                                 safestrncpy(relhome, &argv[a][2],
 133                                                         sizeof relhome);
 134                         home_specified = 1;
 135                         home=1;
 136                 }
 137
 138                 else if (!strncmp(argv[a], "-t", 2)) {
 139                         freopen(&argv[a][2], "w", stderr);
 140                 }
 141
 142                 else if (!strncmp(argv[a], "-f", 2)) {
 143                         do_defrag = 1;
 144                 }
 145
 146                 else if (!strncmp(argv[a], "-D", 2)) {
 147                         dbg = 1;
 148                 }
 149
 150                 /* -r tells the server not to drop root permissions. don't use
 151                  * this unless you know what you're doing. this should be
 152                  * removed in the next release if it proves unnecessary. */
 153                 else if (!strcmp(argv[a], "-r"))
 154                         drop_root_perms = 0;
 155
 156                 /* any other parameter makes it crash and burn */
 157                 else {
 158                         CtdlLogPrintf(CTDL_EMERG,       "citserver: usage: "
 159                                         "citserver "
 160                                         "[-lLogFacility] "
 161                                         "[-d] [-f] [-D] "
 162                                         " [-tTraceFile]"
 163                                         " [-xLogLevel] [-hHomeDir]\n");
 164                         exit(1);
 165                 }
 166
 167         }
 168
 169         calc_dirs_n_files(relh, home, relhome, ctdldir, dbg);
 170         /* daemonize, if we were asked to */
 171         if (running_as_daemon) {
 172                 start_daemon(0);
 173                 drop_root_perms = 1;
 174         }
 175
 176 #ifdef HAVE_BACKTRACE
 177         bzero(&params, sizeof(params));
 178         params.filename = file_pid_paniclog;
 179         panic_fd=open(file_pid_paniclog, O_APPEND|O_CREAT|O_DIRECT);
 180         params.filep = fopen(file_pid_paniclog, "a+");
 181         params.debugLevel = ECRASH_DEBUG_VERBOSE;
 182         params.dumpAllThreads = TRUE;
 183         params.useBacktraceSymbols = 1;
 184 ///     BuildSymbolTable(&symbol_table);
 185 //      params.symbolTable = &symbol_table;
 186         params.signals[0]=SIGSEGV;
 187         params.signals[1]=SIGILL;
 188         params.signals[2]=SIGBUS;
 189         params.signals[3]=SIGABRT;
 190
 191         eCrash_Init(&params);
 192
 193         eCrash_RegisterThread("MasterThread", 0);
 194
 195 ///     signal(SIGSEGV, cit_panic_backtrace);
 196 #endif
 197         /* Initialize the syslogger.  Yes, we are really using 0 as the
 198          * facility, because we are going to bitwise-OR the facility to
 199          * the severity of each message, allowing us to write to other
 200          * facilities when we need to...
 201          */
 202         if (enable_syslog) {
 203                 openlog("citadel", LOG_NDELAY, 0);
 204                 setlogmask(LOG_UPTO(verbosity));
 205         }
 206
 207         /* Tell 'em who's in da house */
 208         CtdlLogPrintf(CTDL_NOTICE, "\n");
 209         CtdlLogPrintf(CTDL_NOTICE, "\n");
 210         CtdlLogPrintf(CTDL_NOTICE,
 211                 "*** Citadel server engine v%d.%02d ***\n",
 212                 (REV_LEVEL/100), (REV_LEVEL%100));
 213         CtdlLogPrintf(CTDL_NOTICE,
 214                 "Copyright (C) 1987-2007 by the Citadel development team.\n");
 215         CtdlLogPrintf(CTDL_NOTICE,
 216                 "This program is distributed under the terms of the GNU "
 217                 "General Public License.\n");
 218         CtdlLogPrintf(CTDL_NOTICE, "\n");
 219         CtdlLogPrintf(CTDL_DEBUG, "Called as: %s\n", argv[0]);
 220         CtdlLogPrintf(CTDL_INFO, "%s\n", libcitadel_version_string());
 221
 222         /* Load site-specific parameters, and set the ipgm secret */
 223         CtdlLogPrintf(CTDL_INFO, "Loading citadel.config\n");
 224         get_config();
 225         config.c_ipgm_secret = rand();
 226         put_config();
 227
 228 #ifdef HAVE_RUN_DIR
 229         /* on some dists rundir gets purged on startup. so we need to recreate it. */
 230
 231         if (stat(ctdl_run_dir, &filestats)==-1){
 232 #ifdef SOLARIS_GETPWUID
 233                 pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
 234 #else
 235                 getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
 236 #endif
 237                 mkdir(ctdl_run_dir, 0755);
 238                 chown(ctdl_run_dir, config.c_ctdluid, (pwp==NULL)?-1:pw.pw_gid);
 239         }
 240
 241
 242 #endif
 243
 244         /* Initialize... */
 245         init_sysdep();
 246
 247         /*
 248          * Do non system dependent startup functions.
 249          */
 250         master_startup();
 251
 252         CtdlLogPrintf(CTDL_INFO, "Acquiring control record\n");
 253         get_control();
 254
 255         /*
 256          * Bind the server to a Unix-domain socket.
 257          */
 258         CtdlRegisterServiceHook(0,
 259                                 file_citadel_socket,
 260                                 citproto_begin_session,
 261                                 do_command_loop,
 262                                 do_async_loop,
 263                                 CitadelServiceUDS);
 264
 265         /*
 266          * Bind the server to our favorite TCP port (usually 504).
 267          */
 268         CtdlRegisterServiceHook(config.c_port_number,
 269                                 NULL,
 270                                 citproto_begin_session,
 271                                 do_command_loop,
 272                                 do_async_loop,
 273                                 CitadelServiceTCP);
 274
 275
 276         /*
 277          * Run any upgrade entry points
 278          */
 279         CtdlLogPrintf(CTDL_INFO, "Upgrading modules.\n");
 280         upgrade_modules();
 281
 282
 283         /*
 284          * Load any server-side extensions available here.
 285          */
 286         CtdlLogPrintf(CTDL_INFO, "Initializing server extensions\n");
 287         size = strlen(ctdl_home_directory) + 9;
 288
 289         initialise_modules(0);
 290
 291
 292
 293         /*
 294          * If we need host auth, start our chkpwd daemon.
 295          */
 296         if (config.c_auth_mode == 1) {
 297                 start_chkpwd_daemon();
 298         }
 299
 300         /*
 301          * Now that we've bound the sockets, change to the Citadel user id and its
 302          * corresponding group ids
 303          */
 304         if (drop_root_perms) {
 305                 cdb_chmod_data();       /* make sure we own our data files */
 306
 307 #ifdef SOLARIS_GETPWUID
 308                 pwp = getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf));
 309 #else
 310                 getpwuid_r(config.c_ctdluid, &pw, pwbuf, sizeof(pwbuf), &pwp);
 311 #endif
 312                 if (pwp == NULL)
 313                         CtdlLogPrintf(CTDL_CRIT, "WARNING: getpwuid(%ld): %s\n"
 314                                    "Group IDs will be incorrect.\n", (long)CTDLUID,
 315                                 strerror(errno));
 316                 else {
 317                         initgroups(pw.pw_name, pw.pw_gid);
 318                         if (setgid(pw.pw_gid))
 319                                 CtdlLogPrintf(CTDL_CRIT, "setgid(%ld): %s\n", (long)pw.pw_gid,
 320                                         strerror(errno));
 321                 }
 322                 CtdlLogPrintf(CTDL_INFO, "Changing uid to %ld\n", (long)CTDLUID);
 323                 if (setuid(CTDLUID) != 0) {
 324                         CtdlLogPrintf(CTDL_CRIT, "setuid() failed: %s\n", strerror(errno));
 325                 }
 326 #if defined (HAVE_SYS_PRCTL_H) && defined (PR_SET_DUMPABLE)
 327                 prctl(PR_SET_DUMPABLE, 1);
 328 #endif
 329         }
 330
 331         /* We want to check for idle sessions once per minute */
 332         CtdlRegisterSessionHook(terminate_idle_sessions, EVT_TIMER);
 333
 334         go_threading();
 335
 336
 337         master_cleanup(exit_signal);
 338         return(0);
 339 }