utils/net.c

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/* 
   Samba Unix/Linux SMB client library 
   Distributed SMB/CIFS Server Management Utility 
   Copyright (C) 2001 Steve French  (sfrench@us.ibm.com)
   Copyright (C) 2001 Jim McDonough (jmcd@us.ibm.com)
   Copyright (C) 2001 Andrew Tridgell (tridge@samba.org)
   Copyright (C) 2001 Andrew Bartlett (abartlet@samba.org)

   Originally written by Steve and Jim. Largely rewritten by tridge in
   November 2001.

   Reworked again by abartlet in December 2001

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 2 of the License, or
   (at your option) any later version.
   
   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.
   
   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.  */
 
/*****************************************************/
/*                                                   */
/*   Distributed SMB/CIFS Server Management Utility  */
/*                                                   */
/*   The intent was to make the syntax similar       */
/*   to the NET utility (first developed in DOS      */
/*   with additional interesting & useful functions  */
/*   added in later SMB server network operating     */
/*   systems).                                       */
/*                                                   */
/*****************************************************/

#include "includes.h"
#include "utils/net.h"

/***********************************************************************/
/* Beginning of internationalization section.  Translatable constants  */
/* should be kept in this area and referenced in the rest of the code. */
/*                                                                     */
/* No functions, outside of Samba or LSB (Linux Standards Base) should */
/* be used (if possible).                                              */
/***********************************************************************/

#define YES_STRING              "Yes"
#define NO_STRING               "No"

/************************************************************************************/
/*                       end of internationalization section                        */
/************************************************************************************/

/* Yes, these buggers are globals.... */
const char *opt_requester_name = NULL;
const char *opt_host = NULL; 
const char *opt_password = NULL;
const char *opt_user_name = NULL;
BOOL opt_user_specified = False;
const char *opt_workgroup = NULL;
int opt_long_list_entries = 0;
int opt_reboot = 0;
int opt_force = 0;
int opt_stdin = 0;
int opt_port = 0;
int opt_verbose = 0;
int opt_maxusers = -1;
const char *opt_comment = "";
const char *opt_container = NULL;
int opt_flags = -1;
int opt_timeout = 0;
const char *opt_target_workgroup = NULL;
int opt_machine_pass = 0;
BOOL opt_localgroup = False;
BOOL opt_domaingroup = False;
static BOOL do_talloc_report=False;
const char *opt_newntname = "";
int opt_rid = 0;
int opt_acls = 0;
int opt_attrs = 0;
int opt_timestamps = 0;
const char *opt_exclude = NULL;
const char *opt_destination = NULL;

BOOL opt_have_ip = False;
struct in_addr opt_dest_ip;

extern struct in_addr loopback_ip;
extern BOOL AllowDebugChange;

uint32 get_sec_channel_type(const char *param) 
{
        if (!(param && *param)) {
                return get_default_sec_channel();
        } else {
                if (strequal(param, "PDC")) {
                        return SEC_CHAN_BDC;
                } else if (strequal(param, "BDC")) {
                        return SEC_CHAN_BDC;
                } else if (strequal(param, "MEMBER")) {
                        return SEC_CHAN_WKSTA;
#if 0                   
                } else if (strequal(param, "DOMAIN")) {
                        return SEC_CHAN_DOMAIN;
#endif
                } else {
                        return get_default_sec_channel();
                }
        }
}

/*
  run a function from a function table. If not found then
  call the specified usage function 
*/
int net_run_function(int argc, const char **argv, struct functable *table, 
                     int (*usage_fn)(int argc, const char **argv))
{
        int i;
        
        if (argc < 1) {
                d_printf("\nUsage: \n");
                return usage_fn(argc, argv);
        }
        for (i=0; table[i].funcname; i++) {
                if (StrCaseCmp(argv[0], table[i].funcname) == 0)
                        return table[i].fn(argc-1, argv+1);
        }
        d_fprintf(stderr, "No command: %s\n", argv[0]);
        return usage_fn(argc, argv);
}

/*
 * run a function from a function table.
 */
int net_run_function2(int argc, const char **argv, const char *whoami,
                      struct functable2 *table)
{
        int i;

        if (argc != 0) {
                for (i=0; table[i].funcname; i++) {
                        if (StrCaseCmp(argv[0], table[i].funcname) == 0)
                                return table[i].fn(argc-1, argv+1);
                }
        }

        for (i=0; table[i].funcname != NULL; i++) {
                d_printf("%s %-15s %s\n", whoami, table[i].funcname,
                         table[i].helptext);
        }

        return -1;
}

/****************************************************************************
connect to \\server\service 
****************************************************************************/

NTSTATUS connect_to_service(struct cli_state **c, struct in_addr *server_ip,
                                        const char *server_name, 
                                        const char *service_name, 
                                        const char *service_type)
{
        NTSTATUS nt_status;

        if (!opt_password && !opt_machine_pass) {
                char *pass = getpass("Password:");
                if (pass) {
                        opt_password = SMB_STRDUP(pass);
                }
        }

        nt_status = cli_full_connection(c, NULL, server_name, 
                                        server_ip, opt_port,
                                        service_name, service_type,  
                                        opt_user_name, opt_workgroup,
                                        opt_password, 0, Undefined, NULL);

        if (NT_STATUS_IS_OK(nt_status) ||
            NT_STATUS_EQUAL(nt_status, NT_STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT) ||
            NT_STATUS_EQUAL(nt_status, NT_STATUS_NOLOGON_SERVER_TRUST_ACCOUNT) ||
            NT_STATUS_EQUAL(nt_status, NT_STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT)) {
                return nt_status;
        }

        d_fprintf(stderr, "Could not connect to server %s\n", server_name);

        /* Display a nicer message depending on the result */

        if (NT_STATUS_V(nt_status) ==
            NT_STATUS_V(NT_STATUS_LOGON_FAILURE))
                d_fprintf(stderr, "The username or password was not correct.\n");

        if (NT_STATUS_V(nt_status) ==
            NT_STATUS_V(NT_STATUS_ACCOUNT_LOCKED_OUT))
                d_fprintf(stderr, "The account was locked out.\n");

        if (NT_STATUS_V(nt_status) ==
            NT_STATUS_V(NT_STATUS_ACCOUNT_DISABLED))
                d_fprintf(stderr, "The account was disabled.\n");

        return nt_status;
}


/****************************************************************************
connect to \\server\ipc$  
****************************************************************************/
NTSTATUS connect_to_ipc(struct cli_state **c, struct in_addr *server_ip,
                                        const char *server_name)
{
        return connect_to_service(c, server_ip, server_name, "IPC$", "IPC");
}

/****************************************************************************
connect to \\server\ipc$ anonymously
****************************************************************************/
NTSTATUS connect_to_ipc_anonymous(struct cli_state **c,
                        struct in_addr *server_ip, const char *server_name)
{
        NTSTATUS nt_status;

        nt_status = cli_full_connection(c, opt_requester_name, server_name, 
                                        server_ip, opt_port,
                                        "IPC$", "IPC",  
                                        "", "",
                                        "", 0, Undefined, NULL);
        
        if (NT_STATUS_IS_OK(nt_status)) {
                return nt_status;
        } else {
                DEBUG(1,("Cannot connect to server (anonymously).  Error was %s\n", nt_errstr(nt_status)));
                return nt_status;
        }
}

/****************************************************************************
 Return malloced user@realm for krb5 login.
****************************************************************************/

static char *get_user_and_realm(const char *username)
{
        char *user_and_realm = NULL;

        if (!username) {
                return NULL;
        }
        if (strchr_m(username, '@')) {
                user_and_realm = SMB_STRDUP(username);
        } else {
                if (asprintf(&user_and_realm, "%s@%s", username, lp_realm()) == -1) {
                        user_and_realm = NULL;
                }
        }
        return user_and_realm;
}

/****************************************************************************
connect to \\server\ipc$ using KRB5
****************************************************************************/

NTSTATUS connect_to_ipc_krb5(struct cli_state **c,
                        struct in_addr *server_ip, const char *server_name)
{
        NTSTATUS nt_status;
        char *user_and_realm = NULL;

        if (!opt_password && !opt_machine_pass) {
                char *pass = getpass("Password:");
                if (pass) {
                        opt_password = SMB_STRDUP(pass);
                }
        }

        user_and_realm = get_user_and_realm(opt_user_name);
        if (!user_and_realm) {
                return NT_STATUS_NO_MEMORY;
        }

        nt_status = cli_full_connection(c, NULL, server_name, 
                                        server_ip, opt_port,
                                        "IPC$", "IPC",  
                                        user_and_realm, opt_workgroup,
                                        opt_password, CLI_FULL_CONNECTION_USE_KERBEROS, 
                                        Undefined, NULL);
        
        SAFE_FREE(user_and_realm);

        if (NT_STATUS_IS_OK(nt_status)) {
                return nt_status;
        } else {
                DEBUG(1,("Cannot connect to server using kerberos.  Error was %s\n", nt_errstr(nt_status)));
                return nt_status;
        }
}

/**
 * Connect a server and open a given pipe
 *
 * @param cli_dst               A cli_state 
 * @param pipe                  The pipe to open
 * @param got_pipe              boolean that stores if we got a pipe
 *
 * @return Normal NTSTATUS return.
 **/
NTSTATUS connect_dst_pipe(struct cli_state **cli_dst, struct rpc_pipe_client **pp_pipe_hnd, int pipe_num)
{
        NTSTATUS nt_status;
        char *server_name = SMB_STRDUP("127.0.0.1");
        struct cli_state *cli_tmp = NULL;
        struct rpc_pipe_client *pipe_hnd = NULL;

        if (server_name == NULL) {
                return NT_STATUS_NO_MEMORY;
        }

        if (opt_destination) {
                SAFE_FREE(server_name);
                if ((server_name = SMB_STRDUP(opt_destination)) == NULL) {
                        return NT_STATUS_NO_MEMORY;
                }
        }

        /* make a connection to a named pipe */
        nt_status = connect_to_ipc(&cli_tmp, NULL, server_name);
        if (!NT_STATUS_IS_OK(nt_status)) {
                SAFE_FREE(server_name);
                return nt_status;
        }

        pipe_hnd = cli_rpc_pipe_open_noauth(cli_tmp, pipe_num, &nt_status);
        if (!pipe_hnd) {
                DEBUG(0, ("couldn't not initialize pipe\n"));
                cli_shutdown(cli_tmp);
                SAFE_FREE(server_name);
                return nt_status;
        }

        *cli_dst = cli_tmp;
        *pp_pipe_hnd = pipe_hnd;
        SAFE_FREE(server_name);

        return nt_status;
}

/****************************************************************************
 Use the local machine account (krb) and password for this session.
****************************************************************************/

int net_use_krb_machine_account(void) 
{
        char *user_name = NULL;

        if (!secrets_init()) {
                d_fprintf(stderr, "ERROR: Unable to open secrets database\n");
                exit(1);
        }

        opt_password = secrets_fetch_machine_password(opt_target_workgroup, NULL, NULL);
        if (asprintf(&user_name, "%s$@%s", global_myname(), lp_realm()) == -1) {
                return -1;
        }
        opt_user_name = user_name;
        return 0;
}

/****************************************************************************
 Use the machine account name and password for this session.
****************************************************************************/

int net_use_machine_account(void)
{
        char *user_name = NULL;
                
        if (!secrets_init()) {
                d_fprintf(stderr, "ERROR: Unable to open secrets database\n");
                exit(1);
        }

        opt_password = secrets_fetch_machine_password(opt_target_workgroup, NULL, NULL);
        if (asprintf(&user_name, "%s$", global_myname()) == -1) {
                return -1;
        }
        opt_user_name = user_name;
        return 0;
}

BOOL net_find_server(const char *domain, unsigned flags, struct in_addr *server_ip, char **server_name)
{
        const char *d = domain ? domain : opt_target_workgroup;

        if (opt_host) {
                *server_name = SMB_STRDUP(opt_host);
        }               

        if (opt_have_ip) {
                *server_ip = opt_dest_ip;
                if (!*server_name) {
                        *server_name = SMB_STRDUP(inet_ntoa(opt_dest_ip));
                }
        } else if (*server_name) {
                /* resolve the IP address */
                if (!resolve_name(*server_name, server_ip, 0x20))  {
                        DEBUG(1,("Unable to resolve server name\n"));
                        return False;
                }
        } else if (flags & NET_FLAGS_PDC) {
                struct in_addr pdc_ip;

                if (get_pdc_ip(d, &pdc_ip)) {
                        fstring dc_name;
                        
                        if (is_zero_ip(pdc_ip))
                                return False;
                        
                        if ( !name_status_find(d, 0x1b, 0x20, pdc_ip, dc_name) )
                                return False;
                                
                        *server_name = SMB_STRDUP(dc_name);
                        *server_ip = pdc_ip;
                }
        } else if (flags & NET_FLAGS_DMB) {
                struct in_addr msbrow_ip;
                /*  if (!resolve_name(MSBROWSE, &msbrow_ip, 1)) */
                if (!resolve_name(d, &msbrow_ip, 0x1B))  {
                        DEBUG(1,("Unable to resolve domain browser via name lookup\n"));
                        return False;
                } else {
                        *server_ip = msbrow_ip;
                }
                *server_name = SMB_STRDUP(inet_ntoa(opt_dest_ip));
        } else if (flags & NET_FLAGS_MASTER) {
                struct in_addr brow_ips;
                if (!resolve_name(d, &brow_ips, 0x1D))  {
                                /* go looking for workgroups */
                        DEBUG(1,("Unable to resolve master browser via name lookup\n"));
                        return False;
                } else {
                        *server_ip = brow_ips;
                }
                *server_name = SMB_STRDUP(inet_ntoa(opt_dest_ip));
        } else if (!(flags & NET_FLAGS_LOCALHOST_DEFAULT_INSANE)) {
                *server_ip = loopback_ip;
                *server_name = SMB_STRDUP("127.0.0.1");
        }

        if (!server_name || !*server_name) {
                DEBUG(1,("no server to connect to\n"));
                return False;
        }

        return True;
}


BOOL net_find_pdc(struct in_addr *server_ip, fstring server_name, const char *domain_name)
{
        if (get_pdc_ip(domain_name, server_ip)) {
                if (is_zero_ip(*server_ip))
                        return False;
                
                if (!name_status_find(domain_name, 0x1b, 0x20, *server_ip, server_name))
                        return False;
                        
                return True;    
        } 
        else
                return False;
}

struct cli_state *net_make_ipc_connection( unsigned flags )
{
        return net_make_ipc_connection_ex( NULL, NULL, NULL, flags );
}

struct cli_state *net_make_ipc_connection_ex( const char *domain, const char *server,
                                              struct in_addr *ip, unsigned flags)
{
        char *server_name = NULL;
        struct in_addr server_ip;
        struct cli_state *cli = NULL;
        NTSTATUS nt_status = NT_STATUS_UNSUCCESSFUL;

        if ( !server || !ip ) {
                if (!net_find_server(domain, flags, &server_ip, &server_name)) {
                        d_fprintf(stderr, "Unable to find a suitable server\n");
                        return NULL;
                }
        } else {
                server_name = SMB_STRDUP( server );
                server_ip = *ip;
        }

        if (opt_user_name) {
                nt_status = connect_to_ipc(&cli, &server_ip, server_name);
                if (NT_STATUS_IS_OK(nt_status)) {
                        goto connected;
                }
        }
        if (flags & NET_FLAGS_ANONYMOUS) {
                nt_status = connect_to_ipc_anonymous(&cli, &server_ip, server_name);
                if (NT_STATUS_IS_OK(nt_status)) {
                        goto connected;
                }
        }

        SAFE_FREE(server_name);
        d_fprintf(stderr, "Connection failed: %s\n",
                  nt_errstr(nt_status));
        return NULL;

 connected:
        /* store the server in the affinity cache if it was a PDC */

        if ( (flags & NET_FLAGS_PDC) && NT_STATUS_IS_OK(nt_status) )
                saf_store( cli->server_domain, cli->desthost );

        return cli;
}

static int net_user(int argc, const char **argv)
{
        if (net_ads_check() == 0)
                return net_ads_user(argc, argv);

        /* if server is not specified, default to PDC? */
        if (net_rpc_check(NET_FLAGS_PDC))
                return net_rpc_user(argc, argv);

        return net_rap_user(argc, argv);
}

static int net_group(int argc, const char **argv)
{
        if (net_ads_check() == 0)
                return net_ads_group(argc, argv);

        if (argc == 0 && net_rpc_check(NET_FLAGS_PDC))
                return net_rpc_group(argc, argv);

        return net_rap_group(argc, argv);
}

static int net_join(int argc, const char **argv)
{
        if (net_ads_check_our_domain() == 0) {
                if (net_ads_join(argc, argv) == 0)
                        return 0;
                else
                        d_fprintf(stderr, "ADS join did not work, falling back to RPC...\n");
        }
        return net_rpc_join(argc, argv);
}

static int net_changetrustpw(int argc, const char **argv)
{
        if (net_ads_check_our_domain() == 0)
                return net_ads_changetrustpw(argc, argv);

        return net_rpc_changetrustpw(argc, argv);
}

static void set_line_buffering(FILE *f)
{
        setvbuf(f, NULL, _IOLBF, 0);
}

static int net_changesecretpw(int argc, const char **argv)
{
        char *trust_pw;
        uint32 sec_channel_type = SEC_CHAN_WKSTA;

        if(opt_force) {
                if (opt_stdin) {
                        set_line_buffering(stdin);
                        set_line_buffering(stdout);
                        set_line_buffering(stderr);
                }

                trust_pw = get_pass("Enter machine password: ", opt_stdin);

                if (!secrets_store_machine_password(trust_pw, lp_workgroup(), sec_channel_type)) {
                            d_fprintf(stderr, "Unable to write the machine account password in the secrets database");
                            return 1;
                }
                else {
                    d_printf("Modified trust account password in secrets database\n");
                }
        }
        else {
                d_printf("Machine account password change requires the -f flag.\n");
                d_printf("Do NOT use this function unless you know what it does!\n");
                d_printf("This function will change the ADS Domain member machine account password in the secrets.tdb file!\n");
        }

        return 0;
}

static int net_share(int argc, const char **argv)
{
        if (net_rpc_check(0))
                return net_rpc_share(argc, argv);
        return net_rap_share(argc, argv);
}

static int net_file(int argc, const char **argv)
{
        if (net_rpc_check(0))
                return net_rpc_file(argc, argv);
        return net_rap_file(argc, argv);
}

/*
 Retrieve our local SID or the SID for the specified name
 */
static int net_getlocalsid(int argc, const char **argv)
{
        DOM_SID sid;
        const char *name;
        fstring sid_str;

        if (argc >= 1) {
                name = argv[0];
        }
        else {
                name = global_myname();
        }

        if(!initialize_password_db(False)) {
                DEBUG(0, ("WARNING: Could not open passdb - local sid may not reflect passdb\n"
                          "backend knowlege (such as the sid stored in LDAP)\n"));
        }

        /* first check to see if we can even access secrets, so we don't
           panic when we can't. */

        if (!secrets_init()) {
                d_fprintf(stderr, "Unable to open secrets.tdb.  Can't fetch domain SID for name: %s\n", name);
                return 1;
        }

        /* Generate one, if it doesn't exist */
        get_global_sam_sid();

        if (!secrets_fetch_domain_sid(name, &sid)) {
                DEBUG(0, ("Can't fetch domain SID for name: %s\n", name));
                return 1;
        }
        sid_to_string(sid_str, &sid);
        d_printf("SID for domain %s is: %s\n", name, sid_str);
        return 0;
}

static int net_setlocalsid(int argc, const char **argv)
{
        DOM_SID sid;

        if ( (argc != 1)
             || (strncmp(argv[0], "S-1-5-21-", strlen("S-1-5-21-")) != 0)
             || (!string_to_sid(&sid, argv[0]))
             || (sid.num_auths != 4)) {
                d_printf("usage: net setlocalsid S-1-5-21-x-y-z\n");
                return 1;
        }

        if (!secrets_store_domain_sid(global_myname(), &sid)) {
                DEBUG(0,("Can't store domain SID as a pdc/bdc.\n"));
                return 1;
        }

        return 0;
}

static int net_setdomainsid(int argc, const char **argv)
{
        DOM_SID sid;

        if ( (argc != 1)
             || (strncmp(argv[0], "S-1-5-21-", strlen("S-1-5-21-")) != 0)
             || (!string_to_sid(&sid, argv[0]))
             || (sid.num_auths != 4)) {
                d_printf("usage: net setdomainsid S-1-5-21-x-y-z\n");
                return 1;
        }

        if (!secrets_store_domain_sid(lp_workgroup(), &sid)) {
                DEBUG(0,("Can't store domain SID.\n"));
                return 1;
        }

        return 0;
}

static int net_getdomainsid(int argc, const char **argv)
{
        DOM_SID domain_sid;
        fstring sid_str;

        if(!initialize_password_db(False)) {
                DEBUG(0, ("WARNING: Could not open passdb - domain sid may not reflect passdb\n"
                          "backend knowlege (such as the sid stored in LDAP)\n"));
        }

        /* first check to see if we can even access secrets, so we don't
           panic when we can't. */

        if (!secrets_init()) {
                d_fprintf(stderr, "Unable to open secrets.tdb.  "
                                  "Can't fetch domainSID for name: %s\n",
                                  get_global_sam_name());
                return 1;
        }

        /* Generate one, if it doesn't exist */
        get_global_sam_sid();

        if (!secrets_fetch_domain_sid(global_myname(), &domain_sid)) {
                d_fprintf(stderr, "Could not fetch local SID\n");
                return 1;
        }
        sid_to_string(sid_str, &domain_sid);
        d_printf("SID for domain %s is: %s\n", global_myname(), sid_str);

        if (!secrets_fetch_domain_sid(opt_workgroup, &domain_sid)) {
                d_fprintf(stderr, "Could not fetch domain SID\n");
                return 1;
        }

        sid_to_string(sid_str, &domain_sid);
        d_printf("SID for domain %s is: %s\n", opt_workgroup, sid_str);

        return 0;
}

#ifdef WITH_FAKE_KASERVER

int net_help_afs(int argc, const char **argv)
{
        d_printf("  net afs key filename\n"
                 "\tImports a OpenAFS KeyFile into our secrets.tdb\n\n");
        d_printf("  net afs impersonate <user> <cell>\n"
                 "\tCreates a token for user@cell\n\n");
        return -1;
}

static int net_afs_key(int argc, const char **argv)
{
        int fd;
        struct afs_keyfile keyfile;

        if (argc != 2) {
                d_printf("usage: 'net afs key <keyfile> cell'\n");
                return -1;
        }

        if (!secrets_init()) {
                d_fprintf(stderr, "Could not open secrets.tdb\n");
                return -1;
        }

        if ((fd = open(argv[0], O_RDONLY, 0)) < 0) {
                d_fprintf(stderr, "Could not open %s\n", argv[0]);
                return -1;
        }

        if (read(fd, &keyfile, sizeof(keyfile)) != sizeof(keyfile)) {
                d_fprintf(stderr, "Could not read keyfile\n");
                return -1;
        }

        if (!secrets_store_afs_keyfile(argv[1], &keyfile)) {
                d_fprintf(stderr, "Could not write keyfile to secrets.tdb\n");
                return -1;
        }

        return 0;
}

static int net_afs_impersonate(int argc, const char **argv)
{
        char *token;

        if (argc != 2) {
                fprintf(stderr, "Usage: net afs impersonate <user> <cell>\n");
                exit(1);
        }

        token = afs_createtoken_str(argv[0], argv[1]);

        if (token == NULL) {
                fprintf(stderr, "Could not create token\n");
                exit(1);
        }

        if (!afs_settoken_str(token)) {
                fprintf(stderr, "Could not set token into kernel\n");
                exit(1);
        }

        printf("Success: %s@%s\n", argv[0], argv[1]);
        return 0;
}

static int net_afs(int argc, const char **argv)
{
        struct functable func[] = {
                {"key", net_afs_key},
                {"impersonate", net_afs_impersonate},
                {"help", net_help_afs},
                {NULL, NULL}
        };
        return net_run_function(argc, argv, func, net_help_afs);
}

#endif /* WITH_FAKE_KASERVER */

static BOOL search_maxrid(struct pdb_search *search, const char *type,
                          uint32 *max_rid)
{
        struct samr_displayentry *entries;
        uint32 i, num_entries;

        if (search == NULL) {
                d_fprintf(stderr, "get_maxrid: Could not search %s\n", type);
                return False;
        }

        num_entries = pdb_search_entries(search, 0, 0xffffffff, &entries);
        for (i=0; i<num_entries; i++)
                *max_rid = MAX(*max_rid, entries[i].rid);
        pdb_search_destroy(search);
        return True;
}

static uint32 get_maxrid(void)
{
        uint32 max_rid = 0;

        if (!search_maxrid(pdb_search_users(0), "users", &max_rid))
                return 0;

        if (!search_maxrid(pdb_search_groups(), "groups", &max_rid))
                return 0;

        if (!search_maxrid(pdb_search_aliases(get_global_sam_sid()),
                           "aliases", &max_rid))
                return 0;
        
        return max_rid;
}

static int net_maxrid(int argc, const char **argv)
{
        uint32 rid;

        if (argc != 0) {
                DEBUG(0, ("usage: net maxrid\n"));
                return 1;
        }

        if ((rid = get_maxrid()) == 0) {
                DEBUG(0, ("can't get current maximum rid\n"));
                return 1;
        }

        d_printf("Currently used maximum rid: %d\n", rid);

        return 0;
}

/* main function table */
static struct functable net_func[] = {
        {"RPC", net_rpc},
        {"RAP", net_rap},
        {"ADS", net_ads},

        /* eventually these should auto-choose the transport ... */
        {"FILE", net_file},
        {"SHARE", net_share},
        {"SESSION", net_rap_session},
        {"SERVER", net_rap_server},
        {"DOMAIN", net_rap_domain},
        {"PRINTQ", net_rap_printq},
        {"USER", net_user},
        {"GROUP", net_group},
        {"GROUPMAP", net_groupmap},
        {"SAM", net_sam},
        {"VALIDATE", net_rap_validate},
        {"GROUPMEMBER", net_rap_groupmember},
        {"ADMIN", net_rap_admin},
        {"SERVICE", net_rap_service},   
        {"PASSWORD", net_rap_password},
        {"CHANGETRUSTPW", net_changetrustpw},
        {"CHANGESECRETPW", net_changesecretpw},
        {"TIME", net_time},
        {"LOOKUP", net_lookup},
        {"JOIN", net_join},
        {"CACHE", net_cache},
        {"GETLOCALSID", net_getlocalsid},
        {"SETLOCALSID", net_setlocalsid},
        {"SETDOMAINSID", net_setdomainsid},
        {"GETDOMAINSID", net_getdomainsid},
        {"MAXRID", net_maxrid},
        {"IDMAP", net_idmap},
        {"STATUS", net_status},
        {"USERSHARE", net_usershare},
        {"USERSIDLIST", net_usersidlist},
#ifdef WITH_FAKE_KASERVER
        {"AFS", net_afs},
#endif

        {"HELP", net_help},
        {NULL, NULL}
};


/****************************************************************************
  main program
****************************************************************************/
 int main(int argc, const char **argv)
{
        int opt,i;
        char *p;
        int rc = 0;
        int argc_new = 0;
        const char ** argv_new;
        poptContext pc;

        struct poptOption long_options[] = {
                {"help",        'h', POPT_ARG_NONE,   0, 'h'},
                {"workgroup",   'w', POPT_ARG_STRING, &opt_target_workgroup},
                {"user",        'U', POPT_ARG_STRING, &opt_user_name, 'U'},
                {"ipaddress",   'I', POPT_ARG_STRING, 0,'I'},
                {"port",        'p', POPT_ARG_INT,    &opt_port},
                {"myname",      'n', POPT_ARG_STRING, &opt_requester_name},
                {"server",      'S', POPT_ARG_STRING, &opt_host},
                {"container",   'c', POPT_ARG_STRING, &opt_container},
                {"comment",     'C', POPT_ARG_STRING, &opt_comment},
                {"maxusers",    'M', POPT_ARG_INT,    &opt_maxusers},
                {"flags",       'F', POPT_ARG_INT,    &opt_flags},
                {"long",        'l', POPT_ARG_NONE,   &opt_long_list_entries},
                {"reboot",      'r', POPT_ARG_NONE,   &opt_reboot},
                {"force",       'f', POPT_ARG_NONE,   &opt_force},
                {"stdin",       'i', POPT_ARG_NONE,   &opt_stdin},
                {"timeout",     't', POPT_ARG_INT,    &opt_timeout},
                {"machine-pass",'P', POPT_ARG_NONE,   &opt_machine_pass},
                {"myworkgroup", 'W', POPT_ARG_STRING, &opt_workgroup},
                {"verbose",     'v', POPT_ARG_NONE,   &opt_verbose},
                /* Options for 'net groupmap set' */
                {"local",       'L', POPT_ARG_NONE,   &opt_localgroup},
                {"domain",      'D', POPT_ARG_NONE,   &opt_domaingroup},
                {"ntname",      'N', POPT_ARG_STRING, &opt_newntname},
                {"rid",         'R', POPT_ARG_INT,    &opt_rid},
                /* Options for 'net rpc share migrate' */
                {"acls",        0, POPT_ARG_NONE,     &opt_acls},
                {"attrs",       0, POPT_ARG_NONE,     &opt_attrs},
                {"timestamps",  0, POPT_ARG_NONE,     &opt_timestamps},
                {"exclude",     'e', POPT_ARG_STRING, &opt_exclude},
                {"destination", 0, POPT_ARG_STRING,   &opt_destination},
                {"tallocreport", 0, POPT_ARG_NONE, &do_talloc_report},

                POPT_COMMON_SAMBA
                { 0, 0, 0, 0}
        };

        zero_ip(&opt_dest_ip);

        load_case_tables();

        /* set default debug level to 0 regardless of what smb.conf sets */
        DEBUGLEVEL_CLASS[DBGC_ALL] = 0;
        dbf = x_stderr;
        
        pc = poptGetContext(NULL, argc, (const char **) argv, long_options, 
                            POPT_CONTEXT_KEEP_FIRST);
        
        while((opt = poptGetNextOpt(pc)) != -1) {
                switch (opt) {
                case 'h':
                        net_help(argc, argv);
                        exit(0);
                        break;
                case 'I':
                        opt_dest_ip = *interpret_addr2(poptGetOptArg(pc));
                        if (is_zero_ip(opt_dest_ip))
                                d_fprintf(stderr, "\nInvalid ip address specified\n");
                        else
                                opt_have_ip = True;
                        break;
                case 'U':
                        opt_user_specified = True;
                        opt_user_name = SMB_STRDUP(opt_user_name);
                        p = strchr(opt_user_name,'%');
                        if (p) {
                                *p = 0;
                                opt_password = p+1;
                        }
                        break;
                default:
                        d_fprintf(stderr, "\nInvalid option %s: %s\n", 
                                 poptBadOption(pc, 0), poptStrerror(opt));
                        net_help(argc, argv);
                        exit(1);
                }
        }
        
        /*
         * Don't load debug level from smb.conf. It should be
         * set by cmdline arg or remain default (0)
         */
        AllowDebugChange = False;
        lp_load(dyn_CONFIGFILE,True,False,False,True);
        
        argv_new = (const char **)poptGetArgs(pc);

        argc_new = argc;
        for (i=0; i<argc; i++) {
                if (argv_new[i] == NULL) {
                        argc_new = i;
                        break;
                }
        }

        if (do_talloc_report) {
                talloc_enable_leak_report();
        }

        if (opt_requester_name) {
                set_global_myname(opt_requester_name);
        }

        if (!opt_user_name && getenv("LOGNAME")) {
                opt_user_name = getenv("LOGNAME");
        }

        if (!opt_user_name) {
                opt_user_name = "";
        }

        if (!opt_workgroup) {
                opt_workgroup = smb_xstrdup(lp_workgroup());
        }
        
        if (!opt_target_workgroup) {
                opt_target_workgroup = smb_xstrdup(lp_workgroup());
        }
        
        if (!init_names())
                exit(1);

        load_interfaces();
        
        /* this makes sure that when we do things like call scripts, 
           that it won't assert becouse we are not root */
        sec_init();

        if (opt_machine_pass) {
                /* it is very useful to be able to make ads queries as the
                   machine account for testing purposes and for domain leave */

                net_use_krb_machine_account();
        }

        if (!opt_password) {
                opt_password = getenv("PASSWD");
        }
         
        rc = net_run_function(argc_new-1, argv_new+1, net_func, net_help);
        
        DEBUG(2,("return code = %d\n", rc));
        return rc;
}

---