2 /* This work is part of OpenLDAP Software <http://www.openldap.org/>.
4 * Copyright 1998-2007 The OpenLDAP Foundation.
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted only as authorized by the OpenLDAP
11 * A copy of this license is available in the file LICENSE in the
12 * top-level directory of the distribution or, alternatively, at
13 * <http://www.OpenLDAP.org/license.html>.
15 /* Portions Copyright (c) 1995 Regents of the University of Michigan.
16 * All rights reserved.
18 * Redistribution and use in source and binary forms are permitted
19 * provided that this notice is preserved and that due credit is given
20 * to the University of Michigan at Ann Arbor. The name of the University
21 * may not be used to endorse or promote products derived from this
22 * software without specific prior written permission. This software
23 * is provided ``as is'' without express or implied warranty.
31 #include <ac/socket.h>
32 #include <ac/string.h>
34 #include <ac/unistd.h>
43 #include "slapi/slapi.h"
47 static RETSIGTYPE wait4child( int sig );
50 #ifdef HAVE_NT_SERVICE_MANAGER
51 #define MAIN_RETURN(x) return
52 static struct sockaddr_in bind_addr;
54 #define SERVICE_EXIT( e, n ) do { \
55 if ( is_NT_Service ) { \
56 lutil_ServiceStatus.dwWin32ExitCode = (e); \
57 lutil_ServiceStatus.dwServiceSpecificExitCode = (n); \
62 #define SERVICE_EXIT( e, n )
63 #define MAIN_RETURN(x) return(x)
66 typedef int (MainFunc) LDAP_P(( int argc, char *argv[] ));
67 extern MainFunc slapadd, slapcat, slapdn, slapindex, slappasswd,
68 slaptest, slapauth, slapacl;
77 {"slapindex", slapindex},
78 {"slappasswd", slappasswd},
79 {"slaptest", slaptest},
80 {"slapauth", slapauth},
82 /* NOTE: new tools must be added in chronological order,
83 * not in alphabetical order, because for backwards
84 * compatibility name[4] is used to identify the
85 * tools; so name[4]=='a' must refer to "slapadd" and
86 * not to "slapauth". Alphabetical order can be used
87 * for tools whose name[4] is not used yet */
92 * when more than one slapd is running on one machine, each one might have
93 * it's own LOCAL for syslogging and must have its own pid/args files
96 #ifndef HAVE_MKVERSION
97 const char Versionstr[] =
98 OPENLDAP_PACKAGE " " OPENLDAP_VERSION " Standalone LDAP Server (slapd)";
101 #define CHECK_NONE 0x00
102 #define CHECK_CONFIG 0x01
103 #define CHECK_LOGLEVEL 0x02
104 static int check = CHECK_NONE;
105 static int version = 0;
111 slapd_opt_slp( const char *val, void *arg )
114 /* NULL is default */
115 if ( val == NULL || *val == '(' || strcasecmp( val, "on" ) == 0 ) {
116 slapd_register_slp = 1;
117 slapd_slp_attrs = (val != NULL && *val == '(') ? val : NULL;
119 } else if ( strcasecmp( val, "off" ) == 0 ) {
120 slapd_register_slp = 0;
122 /* NOTE: add support for URL specification? */
125 fprintf(stderr, "unrecognized value \"%s\" for SLP option\n", val );
132 fputs( "slapd: SLP support is not available\n", stderr );
138 * Option helper structure:
140 * oh_nam is left-hand part of <option>[=<value>]
141 * oh_fnc is handler function
142 * oh_arg is an optional arg to oh_fnc
143 * oh_usage is the one-line usage string related to the option,
144 * which is assumed to start with <option>[=<value>]
146 * please leave valid options in the structure, and optionally #ifdef
147 * their processing inside the helper, so that reasonable and helpful
148 * error messages can be generated if a disabled option is requested.
150 struct option_helper {
151 struct berval oh_name;
152 int (*oh_fnc)(const char *val, void *arg);
154 const char *oh_usage;
155 } option_helpers[] = {
156 { BER_BVC("slp"), slapd_opt_slp, NULL, "slp[={on|off|(attrs)}] enable/disable SLP using (attrs)" },
157 { BER_BVNULL, 0, NULL, NULL }
160 #if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
163 parse_syslog_user( const char *arg, int *syslogUser )
165 static slap_verbmasks syslogUsers[] = {
166 { BER_BVC( "LOCAL0" ), LOG_LOCAL0 },
167 { BER_BVC( "LOCAL1" ), LOG_LOCAL1 },
168 { BER_BVC( "LOCAL2" ), LOG_LOCAL2 },
169 { BER_BVC( "LOCAL3" ), LOG_LOCAL3 },
170 { BER_BVC( "LOCAL4" ), LOG_LOCAL4 },
171 { BER_BVC( "LOCAL5" ), LOG_LOCAL5 },
172 { BER_BVC( "LOCAL6" ), LOG_LOCAL6 },
173 { BER_BVC( "LOCAL7" ), LOG_LOCAL7 },
175 { BER_BVC( "USER" ), LOG_USER },
176 #endif /* LOG_USER */
178 { BER_BVC( "DAEMON" ), LOG_DAEMON },
179 #endif /* LOG_DAEMON */
182 int i = verb_to_mask( arg, syslogUsers );
184 if ( BER_BVISNULL( &syslogUsers[ i ].word ) ) {
185 Debug( LDAP_DEBUG_ANY,
186 "unrecognized syslog user \"%s\".\n",
191 *syslogUser = syslogUsers[ i ].mask;
195 #endif /* LOG_LOCAL4 */
198 parse_syslog_level( const char *arg, int *levelp )
200 static slap_verbmasks str2syslog_level[] = {
201 { BER_BVC( "EMERG" ), LOG_EMERG },
202 { BER_BVC( "ALERT" ), LOG_ALERT },
203 { BER_BVC( "CRIT" ), LOG_CRIT },
204 { BER_BVC( "ERR" ), LOG_ERR },
205 { BER_BVC( "WARNING" ), LOG_WARNING },
206 { BER_BVC( "NOTICE" ), LOG_NOTICE },
207 { BER_BVC( "INFO" ), LOG_INFO },
208 { BER_BVC( "DEBUG" ), LOG_DEBUG },
211 int i = verb_to_mask( arg, str2syslog_level );
212 if ( BER_BVISNULL( &str2syslog_level[ i ].word ) ) {
213 Debug( LDAP_DEBUG_ANY,
214 "unknown syslog level \"%s\".\n",
219 *levelp = str2syslog_level[ i ].mask;
223 #endif /* LDAP_DEBUG && LDAP_SYSLOG */
226 parse_debug_unknowns( char **unknowns, int *levelp )
228 int i, level, rc = 0;
230 for ( i = 0; unknowns[ i ] != NULL; i++ ) {
232 if ( str2loglevel( unknowns[ i ], &level )) {
234 "unrecognized log level \"%s\"\n", unknowns[ i ] );
244 parse_debug_level( const char *arg, int *levelp, char ***unknowns )
248 if ( arg && arg[ 0 ] != '-' && !isdigit( (unsigned char) arg[ 0 ] ) )
253 levels = ldap_str2charray( arg, "," );
255 for ( i = 0; levels[ i ] != NULL; i++ ) {
258 if ( str2loglevel( levels[ i ], &level ) ) {
259 /* remember this for later */
260 ldap_charray_add( unknowns, levels[ i ] );
262 "unrecognized log level \"%s\" (deferred)\n",
269 ldap_charray_free( levels );
272 if ( lutil_atoix( &level, arg, 0 ) != 0 ) {
274 "unrecognized log level "
294 "usage: %s options\n", name );
296 "\t-4\t\tIPv4 only\n"
297 "\t-6\t\tIPv6 only\n"
298 "\t-T {acl|add|auth|cat|dn|index|passwd|test}\n"
299 "\t\t\tRun in Tool mode\n"
300 "\t-c cookie\tSync cookie of consumer\n"
301 "\t-d level\tDebug level" "\n"
302 "\t-f filename\tConfiguration file\n"
303 "\t-F dir\tConfiguration directory\n"
304 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
305 "\t-g group\tGroup (id or name) to run as\n"
307 "\t-h URLs\t\tList of URLs to serve\n"
309 "\t-l facility\tSyslog facility (default: LOCAL4)\n"
311 "\t-n serverName\tService name\n"
312 "\t-o <opt>[=val] generic means to specify options" );
313 if ( !BER_BVISNULL( &option_helpers[0].oh_name ) ) {
316 fprintf( stderr, "; supported options:\n" );
317 for ( i = 0; !BER_BVISNULL( &option_helpers[i].oh_name ); i++) {
318 fprintf( stderr, "\t\t%s\n", option_helpers[i].oh_usage );
321 fprintf( stderr, "\n" );
325 "\t-r directory\tSandbox directory to chroot to\n"
327 "\t-s level\tSyslog level\n"
328 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
329 "\t-u user\t\tUser (id or name) to run as\n"
331 "\t-V\t\tprint version info (-VV only)\n"
335 #ifdef HAVE_NT_SERVICE_MANAGER
336 void WINAPI ServiceMain( DWORD argc, LPTSTR *argv )
338 int main( int argc, char **argv )
341 int i, no_detach = 0;
344 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
345 char *username = NULL;
346 char *groupname = NULL;
348 #if defined(HAVE_CHROOT)
349 char *sandbox = NULL;
352 int syslogUser = SLAP_DEFAULT_SYSLOG_USER;
356 char **g_argv = argv;
358 char *configfile = NULL;
359 char *configdir = NULL;
361 int serverMode = SLAP_SERVER_MODE;
363 struct sync_cookie *scp = NULL;
364 struct sync_cookie *scp_entry = NULL;
366 char **debug_unknowns = NULL;
367 char **syslog_unknowns = NULL;
369 char *serverNamePrefix = "";
372 int slapd_pid_file_unlink = 0, slapd_args_file_unlink = 0;
377 if( ( leakfile = fopen( "slapd.leak", "w" )) == NULL ) {
384 (void) ldap_pvt_thread_initialize();
386 serverName = lutil_progname( "slapd", argc, argv );
388 if ( strcmp( serverName, "slapd" ) ) {
389 for (i=0; tools[i].name; i++) {
390 if ( !strcmp( serverName, tools[i].name ) ) {
391 rc = tools[i].func(argc, argv);
397 #ifdef HAVE_NT_SERVICE_MANAGER
403 char *regService = NULL;
405 if ( is_NT_Service ) {
406 lutil_CommenceStartupProcessing( serverName, slap_sig_shutdown );
407 if ( strcmp(serverName, SERVICE_NAME) )
408 regService = serverName;
411 i = (int*)lutil_getRegParam( regService, "DebugLevel" );
414 Debug( LDAP_DEBUG_ANY,
415 "new debug level from registry is: %d\n", slap_debug, 0, 0 );
418 newUrls = (char *) lutil_getRegParam(regService, "Urls");
423 urls = ch_strdup(newUrls);
424 Debug(LDAP_DEBUG_ANY, "new urls from registry: %s\n",
428 newConfigFile = (char*)lutil_getRegParam( regService, "ConfigFile" );
429 if ( newConfigFile != NULL ) {
430 configfile = newConfigFile;
431 Debug ( LDAP_DEBUG_ANY, "new config file from registry is: %s\n", configfile, 0, 0 );
434 newConfigDir = (char*)lutil_getRegParam( regService, "ConfigDir" );
435 if ( newConfigDir != NULL ) {
436 configdir = newConfigDir;
437 Debug ( LDAP_DEBUG_ANY, "new config dir from registry is: %s\n", configdir, 0, 0 );
442 while ( (i = getopt( argc, argv,
443 "c:d:f:F:h:n:o:s:tT:V"
450 #if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
456 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
463 slap_inet4or6 = AF_INET;
466 slap_inet4or6 = AF_INET6;
470 case 'h': /* listen URLs */
471 if ( urls != NULL ) free( urls );
472 urls = ch_strdup( optarg );
475 case 'c': /* provide sync cookie, override if exist in replica */
476 scp = (struct sync_cookie *) ch_calloc( 1,
477 sizeof( struct sync_cookie ));
478 ber_str2bv( optarg, 0, 1, &scp->octet_str );
480 /* This only parses out the rid at this point */
481 slap_parse_sync_cookie( scp, NULL );
483 if ( scp->rid == -1 ) {
484 Debug( LDAP_DEBUG_ANY,
485 "main: invalid cookie \"%s\"\n",
487 slap_sync_cookie_free( scp, 1 );
491 LDAP_STAILQ_FOREACH( scp_entry, &slap_sync_cookie, sc_next ) {
492 if ( scp->rid == scp_entry->rid ) {
493 Debug( LDAP_DEBUG_ANY,
494 "main: duplicated replica id in cookies\n",
496 slap_sync_cookie_free( scp, 1 );
500 LDAP_STAILQ_INSERT_TAIL( &slap_sync_cookie, scp, sc_next );
503 case 'd': { /* set debug level and 'do not detach' flag */
506 if ( strcmp( optarg, "?" ) == 0 ) {
507 check |= CHECK_LOGLEVEL;
512 if ( parse_debug_level( optarg, &level, &debug_unknowns ) ) {
519 fputs( "must compile with LDAP_DEBUG for debugging\n",
524 case 'f': /* read config file */
525 configfile = ch_strdup( optarg );
528 case 'F': /* use config dir */
529 configdir = ch_strdup( optarg );
533 char *val = strchr( optarg, '=' );
540 opt.bv_len = ( val - optarg );
544 opt.bv_len = strlen( optarg );
547 for ( i = 0; !BER_BVISNULL( &option_helpers[i].oh_name ); i++ ) {
548 if ( ber_bvstrcasecmp( &option_helpers[i].oh_name, &opt ) == 0 ) {
549 assert( option_helpers[i].oh_fnc != NULL );
550 if ( (*option_helpers[i].oh_fnc)( val, option_helpers[i].oh_arg ) == -1 ) {
551 /* we assume the option parsing helper
552 * issues appropriate and self-explanatory
553 * error messages... */
560 if ( BER_BVISNULL( &option_helpers[i].oh_name ) ) {
561 goto unhandled_option;
566 case 's': /* set syslog level */
567 if ( strcmp( optarg, "?" ) == 0 ) {
568 check |= CHECK_LOGLEVEL;
572 if ( parse_debug_level( optarg, &ldap_syslog, &syslog_unknowns ) ) {
577 #if defined(LDAP_DEBUG) && defined(LDAP_SYSLOG)
579 if ( parse_syslog_level( optarg, &ldap_syslog_level ) ) {
585 case 'l': /* set syslog local user */
586 if ( parse_syslog_user( optarg, &syslogUser ) ) {
591 #endif /* LDAP_DEBUG && LDAP_SYSLOG */
595 if( sandbox ) free(sandbox);
596 sandbox = ch_strdup( optarg );
600 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
601 case 'u': /* user name */
602 if( username ) free(username);
603 username = ch_strdup( optarg );
606 case 'g': /* group name */
607 if( groupname ) free(groupname);
608 groupname = ch_strdup( optarg );
610 #endif /* SETUID && GETUID */
612 case 'n': /* NT service name */
613 serverName = ch_strdup( optarg );
617 /* deprecated; use slaptest instead */
618 fprintf( stderr, "option -t deprecated; "
619 "use slaptest command instead\n" );
620 check |= CHECK_CONFIG;
628 if ( firstopt == 0 ) {
629 fprintf( stderr, "warning: \"-T %s\" "
630 "should be the first option.\n",
634 /* try full option string first */
635 for ( i = 0; tools[i].name; i++ ) {
636 if ( strcmp( optarg, &tools[i].name[4] ) == 0 ) {
637 rc = tools[i].func( argc, argv );
642 /* try bits of option string (backward compatibility for single char) */
643 l = strlen( optarg );
644 for ( i = 0; tools[i].name; i++ ) {
645 if ( strncmp( optarg, &tools[i].name[4], l ) == 0 ) {
646 rc = tools[i].func( argc, argv );
653 serverNamePrefix = "slap";
654 fprintf( stderr, "program name \"%s%s\" unrecognized; "
655 "aborting...\n", serverNamePrefix, serverName );
661 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 15 );
670 ber_set_option(NULL, LBER_OPT_DEBUG_LEVEL, &slap_debug);
671 ldap_set_option(NULL, LDAP_OPT_DEBUG_LEVEL, &slap_debug);
672 ldif_debug = slap_debug;
675 fprintf( stderr, "%s\n", Versionstr );
676 if ( version > 1 ) goto stop;
682 logName = ch_strdup( serverName );
685 logName = serverName;
689 openlog( logName, OPENLOG_OPTIONS, syslogUser );
691 openlog( logName, OPENLOG_OPTIONS );
698 Debug( LDAP_DEBUG_ANY, "%s", Versionstr, 0, 0 );
700 if( check == CHECK_NONE && slapd_daemon_init( urls ) != 0 ) {
702 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 16 );
706 #if defined(HAVE_CHROOT)
708 if ( chdir( sandbox ) ) {
713 if ( chroot( sandbox ) ) {
721 #if defined(HAVE_SETUID) && defined(HAVE_SETGID)
722 if ( username != NULL || groupname != NULL ) {
723 slap_init_user( username, groupname );
732 rc = ldap_create( &slap_tls_ld );
734 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
739 rc = slap_init( serverMode, serverName );
741 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 18 );
745 if ( read_config( configfile, configdir ) != 0 ) {
747 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 19 );
749 if ( check & CHECK_CONFIG ) {
750 fprintf( stderr, "config check failed\n" );
756 if ( debug_unknowns ) {
757 rc = parse_debug_unknowns( debug_unknowns, &slap_debug );
758 ldap_charray_free( debug_unknowns );
759 debug_unknowns = NULL;
763 if ( syslog_unknowns ) {
764 rc = parse_debug_unknowns( syslog_unknowns, &ldap_syslog );
765 ldap_charray_free( syslog_unknowns );
766 syslog_unknowns = NULL;
771 if ( check & CHECK_LOGLEVEL ) {
776 if ( check & CHECK_CONFIG ) {
777 fprintf( stderr, "config check succeeded\n" );
779 check &= ~CHECK_CONFIG;
780 if ( check == CHECK_NONE ) {
786 if ( glue_sub_attach( ) != 0 ) {
787 Debug( LDAP_DEBUG_ANY,
788 "subordinate config error\n",
794 if ( slap_schema_check( ) != 0 ) {
795 Debug( LDAP_DEBUG_ANY,
796 "schema prep error\n",
803 rc = ldap_pvt_tls_init();
805 Debug( LDAP_DEBUG_ANY,
806 "main: TLS init failed: %d\n",
809 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
816 /* Force new ctx to be created */
817 rc = ldap_pvt_tls_set_option( slap_tls_ld, LDAP_OPT_X_TLS_NEWCTX, &opt );
819 /* The ctx's refcount is bumped up here */
820 ldap_pvt_tls_get_option( slap_tls_ld, LDAP_OPT_X_TLS_CTX, &slap_tls_ctx );
821 load_extop( &slap_EXOP_START_TLS, 0, starttls_extop );
822 } else if ( rc != LDAP_NOT_SUPPORTED ) {
823 Debug( LDAP_DEBUG_ANY,
824 "main: TLS init def ctx failed: %d\n",
827 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 20 );
833 #ifdef HAVE_CYRUS_SASL
834 if( global_host == NULL ) {
835 global_host = ldap_pvt_get_fqdn( NULL );
839 (void) SIGNAL( LDAP_SIGUSR1, slap_sig_wake );
840 (void) SIGNAL( LDAP_SIGUSR2, slap_sig_shutdown );
843 (void) SIGNAL( SIGPIPE, SIG_IGN );
846 (void) SIGNAL( SIGHUP, slap_sig_shutdown );
848 (void) SIGNAL( SIGINT, slap_sig_shutdown );
849 (void) SIGNAL( SIGTERM, slap_sig_shutdown );
851 (void) SIGNAL( SIGTRAP, slap_sig_shutdown );
854 (void) SIGNAL( LDAP_SIGCHLD, wait4child );
857 /* SIGBREAK is generated when Ctrl-Break is pressed. */
858 (void) SIGNAL( SIGBREAK, slap_sig_shutdown );
862 lutil_detach( no_detach, 0 );
863 #endif /* HAVE_WINSOCK */
869 if ( slapd_pid_file != NULL ) {
870 FILE *fp = fopen( slapd_pid_file, "w" );
873 int save_errno = errno;
875 Debug( LDAP_DEBUG_ANY, "unable to open pid file "
878 save_errno, strerror( save_errno ) );
880 free( slapd_pid_file );
881 slapd_pid_file = NULL;
886 fprintf( fp, "%d\n", (int) getpid() );
888 slapd_pid_file_unlink = 1;
891 if ( slapd_args_file != NULL ) {
892 FILE *fp = fopen( slapd_args_file, "w" );
895 int save_errno = errno;
897 Debug( LDAP_DEBUG_ANY, "unable to open args file "
900 save_errno, strerror( save_errno ) );
902 free( slapd_args_file );
903 slapd_args_file = NULL;
909 for ( i = 0; i < g_argc; i++ ) {
910 fprintf( fp, "%s ", g_argv[i] );
914 slapd_args_file_unlink = 1;
918 * FIXME: moved here from slapd_daemon_task()
919 * because back-monitor db_open() needs it
923 if ( slap_startup( NULL ) != 0 ) {
925 SERVICE_EXIT( ERROR_SERVICE_SPECIFIC_ERROR, 21 );
929 Debug( LDAP_DEBUG_ANY, "slapd starting\n", 0, 0, 0 );
931 #ifdef HAVE_NT_EVENT_LOG
933 lutil_LogStartedEvent( serverName, slap_debug, configfile ?
934 configfile : SLAPD_DEFAULT_CONFIGFILE , urls );
939 #ifdef HAVE_NT_SERVICE_MANAGER
940 /* Throw away the event that we used during the startup process. */
942 ldap_pvt_thread_cond_destroy( &started_event );
946 /* remember an error during shutdown */
947 rc |= slap_shutdown( NULL );
950 if ( check & CHECK_LOGLEVEL ) {
951 (void)loglevel_print( stdout );
953 /* remember an error during destroy */
954 rc |= slap_destroy();
956 while ( !LDAP_STAILQ_EMPTY( &slap_sync_cookie )) {
957 scp = LDAP_STAILQ_FIRST( &slap_sync_cookie );
958 LDAP_STAILQ_REMOVE_HEAD( &slap_sync_cookie, sc_next );
970 supported_feature_destroy();
971 entry_info_destroy();
974 #ifdef HAVE_NT_EVENT_LOG
976 lutil_LogStoppedEvent( serverName );
979 Debug( LDAP_DEBUG_ANY, "slapd stopped.\n", 0, 0, 0 );
982 #ifdef HAVE_NT_SERVICE_MANAGER
983 lutil_ReportShutdownComplete();
989 slapd_daemon_destroy();
995 lutil_passwd_destroy();
999 SSL_CTX_free( slap_tls_ctx );
1000 ldap_unbind_ext( slap_tls_ld, NULL, NULL );
1002 ldap_pvt_tls_destroy();
1005 slap_sasl_regexp_destroy();
1007 if ( slapd_pid_file_unlink ) {
1008 unlink( slapd_pid_file );
1010 if ( slapd_args_file_unlink ) {
1011 unlink( slapd_args_file );
1017 ch_free( configfile );
1019 ch_free( configdir );
1023 /* kludge, get symbols referenced */
1024 tavl_free( NULL, NULL );
1027 mal_dumpleaktrace( leakfile );
1037 * Catch and discard terminated child processes, to avoid zombies.
1041 wait4child( int sig )
1043 int save_errno = errno;
1048 while ( waitpid( (pid_t)-1, NULL, WNOHANG ) > 0 || errno == EINTR )
1051 while ( wait3( NULL, WNOHANG, NULL ) > 0 || errno == EINTR )
1055 (void) wait( NULL );
1057 (void) SIGNAL_REINSTALL( sig, wait4child );
1061 #endif /* LDAP_SIGCHLD */