From 5ea77a75dd2d2158401331879f3c8f47940a732c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 18:35:32 +0200
Subject: Adding upstream version 2.5.13+dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 servers/lloadd/main.c | 949 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 949 insertions(+)
 create mode 100644 servers/lloadd/main.c

(limited to 'servers/lloadd/main.c')

diff --git a/servers/lloadd/main.c b/servers/lloadd/main.c
new file mode 100644
index 0000000..5f24cd4
--- /dev/null
+++ b/servers/lloadd/main.c
@@ -0,0 +1,949 @@
+/* $OpenLDAP$ */
+/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
+ *
+ * Copyright 1998-2022 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 <event2/event.h>
+
+#include "lload.h"
+#include "lutil.h"
+#include "ldif.h"
+
+#ifdef LDAP_SIGCHLD
+static void wait4child( evutil_socket_t sig, short what, void *arg );
+#endif
+
+#ifdef SIGPIPE
+static void sigpipe( evutil_socket_t sig, short what, void *arg );
+#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
+
+struct signal_handler {
+    int signal;
+    event_callback_fn handler;
+    struct event *event;
+} signal_handlers[] = {
+        { LDAP_SIGUSR2, lload_sig_shutdown },
+
+#ifdef SIGPIPE
+        { SIGPIPE, sigpipe },
+#endif
+#ifdef SIGHUP
+        { SIGHUP, lload_sig_shutdown },
+#endif
+        { SIGINT, lload_sig_shutdown },
+        { SIGTERM, lload_sig_shutdown },
+#ifdef SIGTRAP
+        { SIGTRAP, lload_sig_shutdown },
+#endif
+#ifdef LDAP_SIGCHLD
+        { LDAP_SIGCHLD, wait4child },
+#endif
+#ifdef SIGBREAK
+        /* SIGBREAK is generated when Ctrl-Break is pressed. */
+        { SIGBREAK, lload_sig_shutdown },
+#endif
+        { 0, NULL }
+};
+
+/*
+ * when more than one lloadd 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 " LDAP Load Balancer Server (lloadd)";
+#endif
+
+#define CHECK_NONE 0x00
+#define CHECK_CONFIG 0x01
+#define CHECK_LOGLEVEL 0x02
+static int check = CHECK_NONE;
+static int version = 0;
+
+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( "lloadd: 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 );
+        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 );
+        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 {
+        int rc;
+
+        if ( arg[0] == '-' ) {
+            rc = lutil_atoix( &level, arg, 0 );
+        } else {
+            unsigned ulevel;
+
+            rc = lutil_atoux( &ulevel, arg, 0 );
+            level = (int)ulevel;
+        }
+
+        if ( rc ) {
+            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-d level\tDebug level"
+            "\n"
+            "\t-f filename\tConfiguration file\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"
+            "\t-t\t\tCheck configuration file\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 exit afterwards)\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
+
+#ifndef HAVE_WINSOCK
+    int pid, waitfds[2];
+#endif
+    int g_argc = argc;
+    char **g_argv = argv;
+
+    char *configfile = NULL;
+    char *configdir = NULL;
+    char *serverName;
+    int serverMode = SLAP_SERVER_MODE;
+
+    char **debug_unknowns = NULL;
+    char **syslog_unknowns = NULL;
+
+    int slapd_pid_file_unlink = 0, slapd_args_file_unlink = 0;
+    int firstopt = 1;
+
+    slap_sl_mem_init();
+
+    serverName = lutil_progname( "lloadd", argc, argv );
+
+#ifdef HAVE_NT_SERVICE_MANAGER
+    {
+        int *ip;
+        char *newConfigFile;
+        char *newConfigDir;
+        char *newUrls;
+        char *regService = NULL;
+
+        if ( is_NT_Service ) {
+            lutil_CommenceStartupProcessing( serverName, lload_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 );
+        }
+
+        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 );
+        }
+
+        newConfigFile = (char *)lutil_getRegParam( regService, "ConfigFile" );
+        if ( newConfigFile != NULL ) {
+            configfile = ch_strdup( newConfigFile );
+            Debug( LDAP_DEBUG_ANY, "new config file from registry is: %s\n",
+                    configfile );
+        }
+
+        newConfigDir = (char *)lutil_getRegParam( regService, "ConfigDir" );
+        if ( newConfigDir != NULL ) {
+            configdir = ch_strdup( newConfigDir );
+            Debug( LDAP_DEBUG_ANY, "new config dir from registry is: %s\n",
+                    configdir );
+        }
+    }
+#endif
+
+    epoch_init();
+
+    while ( (i = getopt( argc, argv,
+                      "c:d:f:F:h:n:o:s:tV"
+#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 '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 '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':
+                check |= CHECK_CONFIG;
+                break;
+
+            case 'V':
+                version++;
+                break;
+
+            default:
+unhandled_option:;
+                usage( argv[0] );
+                rc = 1;
+                SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 15 );
+                goto stop;
+        }
+
+        if ( firstopt ) {
+            firstopt = 0;
+        }
+    }
+
+    if ( optind != argc ) goto unhandled_option;
+
+    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 );
+
+    global_host = ldap_pvt_get_fqdn( NULL );
+
+    if ( check == CHECK_NONE && lloadd_listeners_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;
+        }
+        if ( chdir( "/" ) ) {
+            perror( "chdir" );
+            rc = 1;
+            goto stop;
+        }
+    }
+#endif
+
+#if defined(HAVE_SETUID) && defined(HAVE_SETGID)
+    if ( username != NULL || groupname != NULL ) {
+        slap_init_user( username, groupname );
+    }
+#endif
+
+    rc = lload_init( serverMode, serverName );
+    if ( rc ) {
+        SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 18 );
+        goto destroy;
+    }
+
+    if ( lload_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;
+        }
+    }
+
+#ifdef HAVE_TLS
+    rc = ldap_pvt_tls_init( 1 );
+    if ( rc != 0 ) {
+        Debug( LDAP_DEBUG_ANY, "main: "
+                "TLS init failed: %d\n",
+                rc );
+        rc = 1;
+        SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
+        goto destroy;
+    }
+
+    if ( lload_tls_init() ) {
+        rc = 1;
+        SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
+        goto destroy;
+    }
+#endif
+
+    daemon_base = event_base_new();
+    if ( !daemon_base ) {
+        Debug( LDAP_DEBUG_ANY, "main: "
+                "main event base allocation failed\n" );
+        rc = 1;
+        SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 21 );
+        goto destroy;
+    }
+
+    for ( i = 0; signal_handlers[i].signal; i++ ) {
+        struct event *event;
+        event = evsignal_new( daemon_base, signal_handlers[i].signal,
+                signal_handlers[i].handler, daemon_base );
+        if ( !event || event_add( event, NULL ) ) {
+            Debug( LDAP_DEBUG_ANY, "main: "
+                    "failed to register a handler for signal %d\n",
+                    signal_handlers[i].signal );
+            rc = 1;
+            SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 21 );
+            goto destroy;
+        }
+        signal_handlers[i].event = event;
+    }
+
+#ifndef HAVE_WINSOCK
+    if ( !no_detach ) {
+        if ( lutil_pair( waitfds ) < 0 ) {
+            Debug( LDAP_DEBUG_ANY, "main: "
+                    "lutil_pair failed\n" );
+            rc = 1;
+            goto destroy;
+        }
+        pid = lutil_detach( no_detach, 0 );
+        if ( pid ) {
+            char buf[4];
+            rc = EXIT_SUCCESS;
+            close( waitfds[1] );
+            if ( read( waitfds[0], buf, 1 ) != 1 ) rc = EXIT_FAILURE;
+            _exit( rc );
+        } else {
+            close( waitfds[0] );
+        }
+    }
+#endif /* HAVE_WINSOCK */
+
+    if ( slapd_pid_file != NULL ) {
+        FILE *fp = fopen( slapd_pid_file, "w" );
+
+        if ( fp == NULL ) {
+            char ebuf[128];
+            int save_errno = errno;
+
+            Debug( LDAP_DEBUG_ANY, "unable to open pid file "
+                    "\"%s\": %d (%s)\n",
+                    slapd_pid_file, save_errno,
+                    AC_STRERROR_R( save_errno, ebuf, sizeof(ebuf) ) );
+
+            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 ) {
+            char ebuf[128];
+            int save_errno = errno;
+
+            Debug( LDAP_DEBUG_ANY, "unable to open args file "
+                    "\"%s\": %d (%s)\n",
+                    slapd_args_file, save_errno,
+                    AC_STRERROR_R( save_errno, ebuf, sizeof(ebuf) ) );
+
+            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 lloadd_daemon_task()
+     * because back-monitor db_open() needs it
+     */
+    time( &starttime );
+
+    Debug( LDAP_DEBUG_ANY, "lloadd starting\n" );
+
+#ifndef HAVE_WINSOCK
+    if ( !no_detach ) {
+        write( waitfds[1], "1", 1 );
+        close( waitfds[1] );
+    }
+#endif
+
+#ifdef HAVE_NT_EVENT_LOG
+    if ( is_NT_Service )
+        lutil_LogStartedEvent( serverName, slap_debug,
+                configfile ? configfile : LLOADD_DEFAULT_CONFIGFILE, urls );
+#endif
+
+    rc = lloadd_daemon( daemon_base );
+
+#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
+
+destroy:
+    if ( daemon_base ) {
+        for ( i = 0; signal_handlers[i].signal; i++ ) {
+            if ( signal_handlers[i].event ) {
+                event_del( signal_handlers[i].event );
+                event_free( signal_handlers[i].event );
+            }
+        }
+        event_base_free( daemon_base );
+    }
+
+    if ( check & CHECK_LOGLEVEL ) {
+        (void)loglevel_print( stdout );
+    }
+    /* remember an error during destroy */
+    rc |= lload_destroy();
+
+stop:
+#ifdef HAVE_NT_EVENT_LOG
+    if ( is_NT_Service ) lutil_LogStoppedEvent( serverName );
+#endif
+
+    Debug( LDAP_DEBUG_ANY, "lloadd stopped.\n" );
+
+#ifdef HAVE_NT_SERVICE_MANAGER
+    lutil_ReportShutdownComplete();
+#endif
+
+#ifdef LOG_DEBUG
+    closelog();
+#endif
+    lloadd_daemon_destroy();
+
+#ifdef HAVE_TLS
+    if ( lload_tls_ld ) {
+        ldap_pvt_tls_ctx_free( lload_tls_ctx );
+        ldap_unbind_ext( lload_tls_ld, NULL, NULL );
+    }
+    ldap_pvt_tls_destroy();
+#endif
+
+    if ( slapd_pid_file_unlink ) {
+        unlink( slapd_pid_file );
+    }
+    if ( slapd_args_file_unlink ) {
+        unlink( slapd_args_file );
+    }
+
+    lload_config_destroy();
+
+    if ( configfile ) ch_free( configfile );
+    if ( configdir ) ch_free( configdir );
+    if ( urls ) ch_free( urls );
+    if ( global_host ) ch_free( global_host );
+
+    /* kludge, get symbols referenced */
+    ldap_tavl_free( NULL, NULL );
+
+    MAIN_RETURN(rc);
+}
+
+#ifdef SIGPIPE
+
+/*
+ *  Catch and discard terminated child processes, to avoid zombies.
+ */
+
+static void
+sigpipe( evutil_socket_t sig, short what, void *arg )
+{
+}
+
+#endif /* SIGPIPE */
+
+#ifdef LDAP_SIGCHLD
+
+/*
+ *  Catch and discard terminated child processes, to avoid zombies.
+ */
+
+static void
+wait4child( evutil_socket_t sig, short what, void *arg )
+{
+    int save_errno = errno;
+
+#ifdef WNOHANG
+    do
+        errno = 0;
+#ifdef HAVE_WAITPID
+    while ( waitpid( (pid_t)-1, NULL, WNOHANG ) > 0 || errno == EINTR );
+#else
+    while ( wait3( NULL, WNOHANG, NULL ) > 0 || errno == EINTR );
+#endif
+#else
+    (void)wait( NULL );
+#endif
+    errno = save_errno;
+}
+
+#endif /* LDAP_SIGCHLD */
-- 
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