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main.c

/* $OpenLDAP: pkg/ldap/servers/slapd/main.c,v 1.239.2.13 2008/05/20 00:10:40 quanah Exp $ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
 *
 * Copyright 1998-2008 The OpenLDAP Foundation.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted only as authorized by the OpenLDAP
 * Public License.
 *
 * A copy of this license is available in the file LICENSE in the
 * top-level directory of the distribution or, alternatively, at
 * <http://www.OpenLDAP.org/license.html>.
 */
/* Portions Copyright (c) 1995 Regents of the University of Michigan.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that this notice is preserved and that due credit is given
 * to the University of Michigan at Ann Arbor. The name of the University
 * may not be used to endorse or promote products derived from this
 * software without specific prior written permission. This software
 * is provided ``as is'' without express or implied warranty.
 */

#include "portable.h"

#include <stdio.h>

#include <ac/ctype.h>
#include <ac/socket.h>
#include <ac/string.h>
#include <ac/time.h>
#include <ac/unistd.h>
#include <ac/wait.h>
#include <ac/errno.h>

#include "slap.h"
#include "lutil.h"
#include "ldif.h"

#ifdef LDAP_SLAPI
#include "slapi/slapi.h"
#endif

#ifdef LDAP_SIGCHLD
static RETSIGTYPE wait4child( int sig );
#endif

#ifdef HAVE_NT_SERVICE_MANAGER
#define MAIN_RETURN(x) return
static struct sockaddr_in     bind_addr;

#define SERVICE_EXIT( e, n )  do { \
      if ( is_NT_Service ) { \
            lutil_ServiceStatus.dwWin32ExitCode                   = (e); \
            lutil_ServiceStatus.dwServiceSpecificExitCode   = (n); \
      } \
} while ( 0 )

#else
#define SERVICE_EXIT( e, n )
#define MAIN_RETURN(x) return(x)
#endif

typedef int (MainFunc) LDAP_P(( int argc, char *argv[] ));
extern MainFunc slapadd, slapcat, slapdn, slapindex, slappasswd,
      slaptest, slapauth, slapacl;

static struct {
      char *name;
      MainFunc *func;
} tools[] = {
      {"slapadd", slapadd},
      {"slapcat", slapcat},
      {"slapdn", slapdn},
      {"slapindex", slapindex},
      {"slappasswd", slappasswd},
      {"slaptest", slaptest},
      {"slapauth", slapauth},
      {"slapacl", slapacl},
      /* NOTE: new tools must be added in chronological order,
       * not in alphabetical order, because for backwards
       * compatibility name[4] is used to identify the
       * tools; so name[4]=='a' must refer to "slapadd" and
       * not to "slapauth".  Alphabetical order can be used
       * for tools whose name[4] is not used yet */
      {NULL, NULL}
};

/*
 * when more than one slapd is running on one machine, each one might have
 * it's own LOCAL for syslogging and must have its own pid/args files
 */

#ifndef HAVE_MKVERSION
const char Versionstr[] =
      OPENLDAP_PACKAGE " " OPENLDAP_VERSION " Standalone LDAP Server (slapd)";
#endif

#define     CHECK_NONE  0x00
#define     CHECK_CONFIG      0x01
#define     CHECK_LOGLEVEL    0x02
static int check = CHECK_NONE;
static int version = 0;

void *slap_tls_ctx;
LDAP *slap_tls_ld;

static int
slapd_opt_slp( const char *val, void *arg )
{
#ifdef HAVE_SLP
      /* NULL is default */
      if ( val == NULL || *val == '(' || strcasecmp( val, "on" ) == 0 ) {
            slapd_register_slp = 1;
            slapd_slp_attrs = (val != NULL && *val == '(') ? val : NULL;

      } else if ( strcasecmp( val, "off" ) == 0 ) {
            slapd_register_slp = 0;

      /* NOTE: add support for URL specification? */

      } else {
            fprintf(stderr, "unrecognized value \"%s\" for SLP option\n", val );
            return -1;
      }

      return 0;
            
#else
      fputs( "slapd: SLP support is not available\n", stderr );
      return 0;
#endif
}

/*
 * Option helper structure:
 * 
 * oh_nam   is left-hand part of <option>[=<value>]
 * oh_fnc   is handler function
 * oh_arg   is an optional arg to oh_fnc
 * oh_usage is the one-line usage string related to the option,
 *          which is assumed to start with <option>[=<value>]
 *
 * please leave valid options in the structure, and optionally #ifdef
 * their processing inside the helper, so that reasonable and helpful
 * error messages can be generated if a disabled option is requested.
 */
struct option_helper {
      struct berval     oh_name;
      int         (*oh_fnc)(const char *val, void *arg);
      void        *oh_arg;
      const char  *oh_usage;
} option_helpers[] = {
      { BER_BVC("slp"), slapd_opt_slp,    NULL, "slp[={on|off|(attrs)}] enable/disable SLP using (attrs)" },
      { BER_BVNULL, 0, NULL, NULL }
};

#if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
#ifdef LOG_LOCAL4
int
parse_syslog_user( const char *arg, int *syslogUser )
{
      static slap_verbmasks syslogUsers[] = {
            { BER_BVC( "LOCAL0" ), LOG_LOCAL0 },
            { BER_BVC( "LOCAL1" ), LOG_LOCAL1 },
            { BER_BVC( "LOCAL2" ), LOG_LOCAL2 },
            { BER_BVC( "LOCAL3" ), LOG_LOCAL3 },
            { BER_BVC( "LOCAL4" ), LOG_LOCAL4 },
            { BER_BVC( "LOCAL5" ), LOG_LOCAL5 },
            { BER_BVC( "LOCAL6" ), LOG_LOCAL6 },
            { BER_BVC( "LOCAL7" ), LOG_LOCAL7 },
#ifdef LOG_USER
            { BER_BVC( "USER" ), LOG_USER },
#endif /* LOG_USER */
#ifdef LOG_DAEMON
            { BER_BVC( "DAEMON" ), LOG_DAEMON },
#endif /* LOG_DAEMON */
            { BER_BVNULL, 0 }
      };
      int i = verb_to_mask( arg, syslogUsers );

      if ( BER_BVISNULL( &syslogUsers[ i ].word ) ) {
            Debug( LDAP_DEBUG_ANY,
                  "unrecognized syslog user \"%s\".\n",
                  arg, 0, 0 );
            return 1;
      }

      *syslogUser = syslogUsers[ i ].mask;

      return 0;
}
#endif /* LOG_LOCAL4 */

int
parse_syslog_level( const char *arg, int *levelp )
{
      static slap_verbmasks   str2syslog_level[] = {
            { BER_BVC( "EMERG" ),   LOG_EMERG },
            { BER_BVC( "ALERT" ),   LOG_ALERT },
            { BER_BVC( "CRIT" ),    LOG_CRIT },
            { BER_BVC( "ERR" ),     LOG_ERR },
            { BER_BVC( "WARNING" ), LOG_WARNING },
            { BER_BVC( "NOTICE" ),  LOG_NOTICE },
            { BER_BVC( "INFO" ),    LOG_INFO },
            { BER_BVC( "DEBUG" ),   LOG_DEBUG },
            { BER_BVNULL, 0 }
      };
      int i = verb_to_mask( arg, str2syslog_level );
      if ( BER_BVISNULL( &str2syslog_level[ i ].word ) ) {
            Debug( LDAP_DEBUG_ANY,
                  "unknown syslog level \"%s\".\n",
                  arg, 0, 0 );
            return 1;
      }
      
      *levelp = str2syslog_level[ i ].mask;

      return 0;
}
#endif /* LDAP_DEBUG && LDAP_SYSLOG */

int
parse_debug_unknowns( char **unknowns, int *levelp )
{
      int i, level, rc = 0;

      for ( i = 0; unknowns[ i ] != NULL; i++ ) {
            level = 0;
            if ( str2loglevel( unknowns[ i ], &level )) {
                  fprintf( stderr,
                        "unrecognized log level \"%s\"\n", unknowns[ i ] );
                  rc = 1;
            } else {
                  *levelp |= level;
            }
      }
      return rc;
}

int
parse_debug_level( const char *arg, int *levelp, char ***unknowns )
{
      int   level;

      if ( arg && arg[ 0 ] != '-' && !isdigit( (unsigned char) arg[ 0 ] ) )
      {
            int   i;
            char  **levels;

            levels = ldap_str2charray( arg, "," );

            for ( i = 0; levels[ i ] != NULL; i++ ) {
                  level = 0;

                  if ( str2loglevel( levels[ i ], &level ) ) {
                        /* remember this for later */
                        ldap_charray_add( unknowns, levels[ i ] );
                        fprintf( stderr,
                              "unrecognized log level \"%s\" (deferred)\n",
                              levels[ i ] );
                  } else {
                        *levelp |= level;
                  }
            }

            ldap_charray_free( levels );

      } else {
            if ( lutil_atoix( &level, arg, 0 ) != 0 ) {
                  fprintf( stderr,
                        "unrecognized log level "
                        "\"%s\"\n", arg );
                  return 1;
            }

            if ( level == 0 ) {
                  *levelp = 0;

            } else {
                  *levelp |= level;
            }
      }

      return 0;
}

static void
usage( char *name )
{
      fprintf( stderr,
            "usage: %s options\n", name );
      fprintf( stderr,
            "\t-4\t\tIPv4 only\n"
            "\t-6\t\tIPv6 only\n"
            "\t-T {acl|add|auth|cat|dn|index|passwd|test}\n"
            "\t\t\tRun in Tool mode\n"
            "\t-c cookie\tSync cookie of consumer\n"
            "\t-d level\tDebug level" "\n"
            "\t-f filename\tConfiguration file\n"
            "\t-F dir\tConfiguration directory\n"
#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
            "\t-g group\tGroup (id or name) to run as\n"
#endif
            "\t-h URLs\t\tList of URLs to serve\n"
#ifdef SLAP_DEFAULT_SYSLOG_USER
            "\t-l facility\tSyslog facility (default: LOCAL4)\n"
#endif
            "\t-n serverName\tService name\n"
            "\t-o <opt>[=val] generic means to specify options" );
      if ( !BER_BVISNULL( &option_helpers[0].oh_name ) ) {
            int   i;

            fprintf( stderr, "; supported options:\n" );
            for ( i = 0; !BER_BVISNULL( &option_helpers[i].oh_name ); i++) {
                  fprintf( stderr, "\t\t%s\n", option_helpers[i].oh_usage );
            }
      } else {
            fprintf( stderr, "\n" );
      }
      fprintf( stderr,  
#ifdef HAVE_CHROOT
            "\t-r directory\tSandbox directory to chroot to\n"
#endif
            "\t-s level\tSyslog level\n"
#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
            "\t-u user\t\tUser (id or name) to run as\n"
#endif
            "\t-V\t\tprint version info (-VV only)\n"
    );
}

#ifdef HAVE_NT_SERVICE_MANAGER
void WINAPI ServiceMain( DWORD argc, LPTSTR *argv )
#else
int main( int argc, char **argv )
#endif
{
      int         i, no_detach = 0;
      int         rc = 1;
      char *urls = NULL;
#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
      char *username = NULL;
      char *groupname = NULL;
#endif
#if defined(HAVE_CHROOT)
      char *sandbox = NULL;
#endif
#ifdef SLAP_DEFAULT_SYSLOG_USER
      int syslogUser = SLAP_DEFAULT_SYSLOG_USER;
#endif
      
      int g_argc = argc;
      char **g_argv = argv;

      char *configfile = NULL;
      char *configdir = NULL;
      char *serverName;
      int serverMode = SLAP_SERVER_MODE;

      struct sync_cookie *scp = NULL;
      struct sync_cookie *scp_entry = NULL;

      char **debug_unknowns = NULL;
      char **syslog_unknowns = NULL;

      char *serverNamePrefix = "";
      size_t      l;

      int slapd_pid_file_unlink = 0, slapd_args_file_unlink = 0;
      int firstopt = 1;

#ifdef CSRIMALLOC
      FILE *leakfile;
      if( ( leakfile = fopen( "slapd.leak", "w" )) == NULL ) {
            leakfile = stderr;
      }
#endif

      slap_sl_mem_init();

      (void) ldap_pvt_thread_initialize();

      serverName = lutil_progname( "slapd", argc, argv );

      if ( strcmp( serverName, "slapd" ) ) {
            for (i=0; tools[i].name; i++) {
                  if ( !strcmp( serverName, tools[i].name ) ) {
                        rc = tools[i].func(argc, argv);
                        MAIN_RETURN(rc);
                  }
            }
      }

#ifdef HAVE_NT_SERVICE_MANAGER
      {
            int *ip;
            char *newConfigFile;
            char *newConfigDir;
            char *newUrls;
            char *regService = NULL;

            if ( is_NT_Service ) {
                  lutil_CommenceStartupProcessing( serverName, slap_sig_shutdown );
                  if ( strcmp(serverName, SERVICE_NAME) )
                      regService = serverName;
            }

            ip = (int*)lutil_getRegParam( regService, "DebugLevel" );
            if ( ip != NULL ) {
                  slap_debug = *ip;
                  Debug( LDAP_DEBUG_ANY,
                        "new debug level from registry is: %d\n", slap_debug, 0, 0 );
            }

            newUrls = (char *) lutil_getRegParam(regService, "Urls");
            if (newUrls) {
                if (urls)
                  ch_free(urls);

                urls = ch_strdup(newUrls);
                Debug(LDAP_DEBUG_ANY, "new urls from registry: %s\n",
                        urls, 0, 0);
            }

            newConfigFile = (char*)lutil_getRegParam( regService, "ConfigFile" );
            if ( newConfigFile != NULL ) {
                  configfile = newConfigFile;
                  Debug ( LDAP_DEBUG_ANY, "new config file from registry is: %s\n", configfile, 0, 0 );
            }

            newConfigDir = (char*)lutil_getRegParam( regService, "ConfigDir" );
            if ( newConfigDir != NULL ) {
                  configdir = newConfigDir;
                  Debug ( LDAP_DEBUG_ANY, "new config dir from registry is: %s\n", configdir, 0, 0 );
            }
      }
#endif

      while ( (i = getopt( argc, argv,
                       "c:d:f:F:h:n:o:s:tT:V"
#ifdef LDAP_PF_INET6
                        "46"
#endif
#ifdef HAVE_CHROOT
                        "r:"
#endif
#if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
                        "S:"
#ifdef LOG_LOCAL4
                        "l:"
#endif
#endif
#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
                        "u:g:"
#endif
                       )) != EOF ) {
            switch ( i ) {
#ifdef LDAP_PF_INET6
            case '4':
                  slap_inet4or6 = AF_INET;
                  break;
            case '6':
                  slap_inet4or6 = AF_INET6;
                  break;
#endif

            case 'h':   /* listen URLs */
                  if ( urls != NULL ) free( urls );
                  urls = ch_strdup( optarg );
                  break;

            case 'c':   /* provide sync cookie, override if exist in replica */
                  scp = (struct sync_cookie *) ch_calloc( 1,
                                                            sizeof( struct sync_cookie ));
                  ber_str2bv( optarg, 0, 1, &scp->octet_str );
                  
                  /* This only parses out the rid at this point */
                  slap_parse_sync_cookie( scp, NULL );

                  if ( scp->rid == -1 ) {
                        Debug( LDAP_DEBUG_ANY,
                                    "main: invalid cookie \"%s\"\n",
                                    optarg, 0, 0 );
                        slap_sync_cookie_free( scp, 1 );
                        goto destroy;
                  }

                  LDAP_STAILQ_FOREACH( scp_entry, &slap_sync_cookie, sc_next ) {
                        if ( scp->rid == scp_entry->rid ) {
                              Debug( LDAP_DEBUG_ANY,
                                        "main: duplicated replica id in cookies\n",
                                          0, 0, 0 );
                              slap_sync_cookie_free( scp, 1 );
                              goto destroy;
                        }
                  }
                  LDAP_STAILQ_INSERT_TAIL( &slap_sync_cookie, scp, sc_next );
                  break;

            case 'd': { /* set debug level and 'do not detach' flag */
                  int   level = 0;

                  if ( strcmp( optarg, "?" ) == 0 ) {
                        check |= CHECK_LOGLEVEL;
                        break;
                  }

                  no_detach = 1;
                  if ( parse_debug_level( optarg, &level, &debug_unknowns ) ) {
                        goto destroy;
                  }
#ifdef LDAP_DEBUG
                  slap_debug |= level;
#else
                  if ( level != 0 )
                        fputs( "must compile with LDAP_DEBUG for debugging\n",
                               stderr );
#endif
                  } break;

            case 'f':   /* read config file */
                  configfile = ch_strdup( optarg );
                  break;

            case 'F':   /* use config dir */
                  configdir = ch_strdup( optarg );
                  break;

            case 'o': {
                  char        *val = strchr( optarg, '=' );
                  struct berval     opt;

                  opt.bv_val = optarg;
                  
                  if ( val ) {
                        opt.bv_len = ( val - optarg );
                        val++;
                  
                  } else {
                        opt.bv_len = strlen( optarg );
                  }

                  for ( i = 0; !BER_BVISNULL( &option_helpers[i].oh_name ); i++ ) {
                        if ( ber_bvstrcasecmp( &option_helpers[i].oh_name, &opt ) == 0 ) {
                              assert( option_helpers[i].oh_fnc != NULL );
                              if ( (*option_helpers[i].oh_fnc)( val, option_helpers[i].oh_arg ) == -1 ) {
                                    /* we assume the option parsing helper
                                     * issues appropriate and self-explanatory
                                     * error messages... */
                                    goto stop;
                              }
                              break;
                        }
                  }

                  if ( BER_BVISNULL( &option_helpers[i].oh_name ) ) {
                        goto unhandled_option;
                  }
                  break;
            }

            case 's':   /* set syslog level */
                  if ( strcmp( optarg, "?" ) == 0 ) {
                        check |= CHECK_LOGLEVEL;
                        break;
                  }

                  if ( parse_debug_level( optarg, &ldap_syslog, &syslog_unknowns ) ) {
                        goto destroy;
                  }
                  break;

#if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
            case 'S':
                  if ( parse_syslog_level( optarg, &ldap_syslog_level ) ) {
                        goto destroy;
                  }
                  break;

#ifdef LOG_LOCAL4
            case 'l':   /* set syslog local user */
                  if ( parse_syslog_user( optarg, &syslogUser ) ) {
                        goto destroy;
                  }
                  break;
#endif
#endif /* LDAP_DEBUG && LDAP_SYSLOG */

#ifdef HAVE_CHROOT
            case 'r':
                  if( sandbox ) free(sandbox);
                  sandbox = ch_strdup( optarg );
                  break;
#endif

#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
            case 'u':   /* user name */
                  if( username ) free(username);
                  username = ch_strdup( optarg );
                  break;

            case 'g':   /* group name */
                  if( groupname ) free(groupname);
                  groupname = ch_strdup( optarg );
                  break;
#endif /* SETUID && GETUID */

            case 'n':  /* NT service name */
                  serverName = ch_strdup( optarg );
                  break;

            case 't':
                  /* deprecated; use slaptest instead */
                  fprintf( stderr, "option -t deprecated; "
                        "use slaptest command instead\n" );
                  check |= CHECK_CONFIG;
                  break;

            case 'V':
                  version++;
                  break;

            case 'T':
                  if ( firstopt == 0 ) {
                        fprintf( stderr, "warning: \"-T %s\" "
                              "should be the first option.\n",
                              optarg );
                  }

                  /* try full option string first */
                  for ( i = 0; tools[i].name; i++ ) {
                        if ( strcmp( optarg, &tools[i].name[4] ) == 0 ) {
                              rc = tools[i].func( argc, argv );
                              MAIN_RETURN( rc );
                        }
                  }

                  /* try bits of option string (backward compatibility for single char) */
                  l = strlen( optarg );
                  for ( i = 0; tools[i].name; i++ ) {
                        if ( strncmp( optarg, &tools[i].name[4], l ) == 0 ) {
                              rc = tools[i].func( argc, argv );
                              MAIN_RETURN( rc );
                        }
                  }
                  
                  /* issue error */
                  serverName = optarg;
                  serverNamePrefix = "slap";
                  fprintf( stderr, "program name \"%s%s\" unrecognized; "
                              "aborting...\n", serverNamePrefix, serverName );
                  /* FALLTHRU */
            default:
unhandled_option:;
                  usage( argv[0] );
                  rc = 1;
                  SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 15 );
                  goto stop;
            }

            if ( firstopt ) {
                  firstopt = 0;
            }
      }

      ber_set_option(NULL, LBER_OPT_DEBUG_LEVEL, &slap_debug);
      ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &slap_debug);
      ldif_debug = slap_debug;

      if ( version ) {
            fprintf( stderr, "%s\n", Versionstr );
            if ( version > 1 ) goto stop;
      }

#if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
      {
            char *logName;
#ifdef HAVE_EBCDIC
            logName = ch_strdup( serverName );
            __atoe( logName );
#else
            logName = serverName;
#endif

#ifdef LOG_LOCAL4
            openlog( logName, OPENLOG_OPTIONS, syslogUser );
#elif defined LOG_DEBUG
            openlog( logName, OPENLOG_OPTIONS );
#endif
#ifdef HAVE_EBCDIC
            free( logName );
#endif
      }
#endif /* LDAP_DEBUG && LDAP_SYSLOG */

      Debug( LDAP_DEBUG_ANY, "%s", Versionstr, 0, 0 );

      global_host = ldap_pvt_get_fqdn( NULL );

      if( check == CHECK_NONE && slapd_daemon_init( urls ) != 0 ) {
            rc = 1;
            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 16 );
            goto stop;
      }

#if defined(HAVE_CHROOT)
      if ( sandbox ) {
            if ( chdir( sandbox ) ) {
                  perror("chdir");
                  rc = 1;
                  goto stop;
            }
            if ( chroot( sandbox ) ) {
                  perror("chroot");
                  rc = 1;
                  goto stop;
            }
      }
#endif

#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
      if ( username != NULL || groupname != NULL ) {
            slap_init_user( username, groupname );
      }
#endif

      extops_init();
      lutil_passwd_init();

#ifdef HAVE_TLS
      rc = ldap_create( &slap_tls_ld );
      if ( rc ) {
            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
            goto destroy;
      }
      /* Library defaults to full certificate checking. This is correct when
       * a client is verifying a server because all servers should have a
       * valid cert. But few clients have valid certs, so we want our default
       * to be no checking. The config file can override this as usual.
       */
      rc = LDAP_OPT_X_TLS_NEVER;
      (void) ldap_pvt_tls_set_option( slap_tls_ld, LDAP_OPT_X_TLS_REQUIRE_CERT, &rc );
#endif

      rc = slap_init( serverMode, serverName );
      if ( rc ) {
            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 18 );
            goto destroy;
      }

      if ( read_config( configfile, configdir ) != 0 ) {
            rc = 1;
            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 19 );

            if ( check & CHECK_CONFIG ) {
                  fprintf( stderr, "config check failed\n" );
            }

            goto destroy;
      }

      if ( debug_unknowns ) {
            rc = parse_debug_unknowns( debug_unknowns, &slap_debug );
            ldap_charray_free( debug_unknowns );
            debug_unknowns = NULL;
            if ( rc )
                  goto destroy;
      }
      if ( syslog_unknowns ) {
            rc = parse_debug_unknowns( syslog_unknowns, &ldap_syslog );
            ldap_charray_free( syslog_unknowns );
            syslog_unknowns = NULL;
            if ( rc )
                  goto destroy;
      }     

      if ( check & CHECK_LOGLEVEL ) {
            rc = 0;
            goto destroy;
      }

      if ( check & CHECK_CONFIG ) {
            fprintf( stderr, "config check succeeded\n" );

            check &= ~CHECK_CONFIG;
            if ( check == CHECK_NONE ) {
                  rc = 0;
                  goto destroy;
            }
      }

      if ( glue_sub_attach( ) != 0 ) {
            Debug( LDAP_DEBUG_ANY,
                "subordinate config error\n",
                0, 0, 0 );

            goto destroy;
      }

      if ( slap_schema_check( ) != 0 ) {
            Debug( LDAP_DEBUG_ANY,
                "schema prep error\n",
                0, 0, 0 );

            goto destroy;
      }

#ifdef HAVE_TLS
      rc = ldap_pvt_tls_init();
      if( rc != 0) {
            Debug( LDAP_DEBUG_ANY,
                "main: TLS init failed: %d\n",
                0, 0, 0 );
            rc = 1;
            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
            goto destroy;
      }

      {
            int opt = 1;

            /* Force new ctx to be created */
            rc = ldap_pvt_tls_set_option( slap_tls_ld, LDAP_OPT_X_TLS_NEWCTX, &opt );
            if( rc == 0 ) {
                  /* The ctx's refcount is bumped up here */
                  ldap_pvt_tls_get_option( slap_tls_ld, LDAP_OPT_X_TLS_CTX, &slap_tls_ctx );
                  load_extop( &slap_EXOP_START_TLS, 0, starttls_extop );
            } else if ( rc != LDAP_NOT_SUPPORTED ) {
                  Debug( LDAP_DEBUG_ANY,
                      "main: TLS init def ctx failed: %d\n",
                      rc, 0, 0 );
                  rc = 1;
                  SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
                  goto destroy;
            }
      }
#endif

#ifdef HAVE_CYRUS_SASL
      if( sasl_host == NULL ) {
            sasl_host = ch_strdup( global_host );
      }
#endif

      (void) SIGNAL( LDAP_SIGUSR1, slap_sig_wake );
      (void) SIGNAL( LDAP_SIGUSR2, slap_sig_shutdown );

#ifdef SIGPIPE
      (void) SIGNAL( SIGPIPE, SIG_IGN );
#endif
#ifdef SIGHUP
      (void) SIGNAL( SIGHUP, slap_sig_shutdown );
#endif
      (void) SIGNAL( SIGINT, slap_sig_shutdown );
      (void) SIGNAL( SIGTERM, slap_sig_shutdown );
#ifdef SIGTRAP
      (void) SIGNAL( SIGTRAP, slap_sig_shutdown );
#endif
#ifdef LDAP_SIGCHLD
      (void) SIGNAL( LDAP_SIGCHLD, wait4child );
#endif
#ifdef SIGBREAK
      /* SIGBREAK is generated when Ctrl-Break is pressed. */
      (void) SIGNAL( SIGBREAK, slap_sig_shutdown );
#endif

#ifndef HAVE_WINSOCK
      lutil_detach( no_detach, 0 );
#endif /* HAVE_WINSOCK */

#ifdef CSRIMALLOC
      mal_leaktrace(1);
#endif

      if ( slapd_pid_file != NULL ) {
            FILE *fp = fopen( slapd_pid_file, "w" );

            if ( fp == NULL ) {
                  int save_errno = errno;

                  Debug( LDAP_DEBUG_ANY, "unable to open pid file "
                        "\"%s\": %d (%s)\n",
                        slapd_pid_file,
                        save_errno, strerror( save_errno ) );

                  free( slapd_pid_file );
                  slapd_pid_file = NULL;

                  rc = 1;
                  goto destroy;
            }
            fprintf( fp, "%d\n", (int) getpid() );
            fclose( fp );
            slapd_pid_file_unlink = 1;
      }

      if ( slapd_args_file != NULL ) {
            FILE *fp = fopen( slapd_args_file, "w" );

            if ( fp == NULL ) {
                  int save_errno = errno;

                  Debug( LDAP_DEBUG_ANY, "unable to open args file "
                        "\"%s\": %d (%s)\n",
                        slapd_args_file,
                        save_errno, strerror( save_errno ) );

                  free( slapd_args_file );
                  slapd_args_file = NULL;

                  rc = 1;
                  goto destroy;
            }

            for ( i = 0; i < g_argc; i++ ) {
                  fprintf( fp, "%s ", g_argv[i] );
            }
            fprintf( fp, "\n" );
            fclose( fp );
            slapd_args_file_unlink = 1;
      }

      /*
       * FIXME: moved here from slapd_daemon_task()
       * because back-monitor db_open() needs it
       */
      time( &starttime );

      connections_init();

      if ( slap_startup( NULL ) != 0 ) {
            rc = 1;
            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 21 );
            goto shutdown;
      }

      Debug( LDAP_DEBUG_ANY, "slapd starting\n", 0, 0, 0 );

#ifdef HAVE_NT_EVENT_LOG
      if (is_NT_Service)
      lutil_LogStartedEvent( serverName, slap_debug, configfile ?
            configfile : SLAPD_DEFAULT_CONFIGFILE , urls );
#endif

      rc = slapd_daemon();

#ifdef HAVE_NT_SERVICE_MANAGER
      /* Throw away the event that we used during the startup process. */
      if ( is_NT_Service )
            ldap_pvt_thread_cond_destroy( &started_event );
#endif

shutdown:
      /* remember an error during shutdown */
      rc |= slap_shutdown( NULL );

destroy:
      if ( check & CHECK_LOGLEVEL ) {
            (void)loglevel_print( stdout );
      }
      /* remember an error during destroy */
      rc |= slap_destroy();

      while ( !LDAP_STAILQ_EMPTY( &slap_sync_cookie )) {
            scp = LDAP_STAILQ_FIRST( &slap_sync_cookie );
            LDAP_STAILQ_REMOVE_HEAD( &slap_sync_cookie, sc_next );
            ch_free( scp );
      }

#ifdef SLAPD_MODULES
      module_kill();
#endif

      extops_kill();

      supported_feature_destroy();
      entry_info_destroy();

stop:
#ifdef HAVE_NT_EVENT_LOG
      if (is_NT_Service)
      lutil_LogStoppedEvent( serverName );
#endif

      Debug( LDAP_DEBUG_ANY, "slapd stopped.\n", 0, 0, 0 );


#ifdef HAVE_NT_SERVICE_MANAGER
      lutil_ReportShutdownComplete();
#endif

#ifdef LOG_DEBUG
    closelog();
#endif
      slapd_daemon_destroy();

      controls_destroy();

      filter_destroy();

      schema_destroy();

      lutil_passwd_destroy();

#ifdef HAVE_TLS
      if ( slap_tls_ld ) {
            ldap_pvt_tls_ctx_free( slap_tls_ctx );
            ldap_unbind_ext( slap_tls_ld, NULL, NULL );
      }
      ldap_pvt_tls_destroy();
#endif

      slap_sasl_regexp_destroy();

      if ( slapd_pid_file_unlink ) {
            unlink( slapd_pid_file );
      }
      if ( slapd_args_file_unlink ) {
            unlink( slapd_args_file );
      }

      config_destroy();

      if ( configfile )
            ch_free( configfile );
      if ( configdir )
            ch_free( configdir );
      if ( urls )
            ch_free( urls );

      /* kludge, get symbols referenced */
      tavl_free( NULL, NULL );

#ifdef CSRIMALLOC
      mal_dumpleaktrace( leakfile );
#endif

      MAIN_RETURN(rc);
}


#ifdef LDAP_SIGCHLD

/*
 *  Catch and discard terminated child processes, to avoid zombies.
 */

static RETSIGTYPE
wait4child( int sig )
{
    int save_errno = errno;

#ifdef WNOHANG
    errno = 0;
#ifdef HAVE_WAITPID
    while ( waitpid( (pid_t)-1, NULL, WNOHANG ) > 0 || errno == EINTR )
      ;     /* NULL */
#else
    while ( wait3( NULL, WNOHANG, NULL ) > 0 || errno == EINTR )
      ;     /* NULL */
#endif
#else
    (void) wait( NULL );
#endif
    (void) SIGNAL_REINSTALL( sig, wait4child );
    errno = save_errno;
}

#endif /* LDAP_SIGCHLD */


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