Merge branch 'master' of ssh://git.samba.org/data/git/samba
[bbaumbach/samba-autobuild/.git] / source3 / winbindd / winbindd.c
index 57eee20f49dfd7ad80e7d257d0a83a3e4f59df6e..0ecf11d0e5e3f236428b5bbfcfd2b1ae73376b38 100644 (file)
@@ -7,17 +7,17 @@
    Copyright (C) Andrew Tridgell 2002
    Copyright (C) Jelmer Vernooij 2003
    Copyright (C) Volker Lendecke 2004
-   
+
    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 3 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, see <http://www.gnu.org/licenses/>.
 */
@@ -47,27 +47,36 @@ struct messaging_context *winbind_messaging_context(void)
 {
        static struct messaging_context *ctx;
 
-       if (!ctx && !(ctx = messaging_init(NULL, server_id_self(),
-                                          winbind_event_context()))) {
-               smb_panic("Could not init winbind messaging context");
+       if (ctx == NULL) {
+               ctx = messaging_init(NULL, server_id_self(),
+                                    winbind_event_context());
+       }
+       if (ctx == NULL) {
+               DEBUG(0, ("Could not init winbind messaging context.\n"));
        }
        return ctx;
 }
 
 /* Reload configuration */
 
-static bool reload_services_file(void)
+static bool reload_services_file(const char *lfile)
 {
        bool ret;
 
        if (lp_loaded()) {
                const char *fname = lp_configfile();
 
-               if (file_exist(fname,NULL) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
+               if (file_exist(fname) && !strcsequal(fname,get_dyn_CONFIGFILE())) {
                        set_dyn_CONFIGFILE(fname);
                }
        }
 
+       /* if this is a child, restore the logfile to the special
+          name - <domain>, idmap, etc. */
+       if (lfile && *lfile) {
+               lp_set_logfile(lfile);
+       }
+
        reopen_logs();
        ret = lp_load(get_dyn_CONFIGFILE(),False,False,True,True);
 
@@ -94,9 +103,9 @@ static void winbindd_status(void)
        DEBUG(0, ("winbindd status:\n"));
 
        /* Print client state information */
-       
+
        DEBUG(0, ("\t%d clients currently active\n", winbindd_num_clients()));
-       
+
        if (DEBUGLEVEL >= 2 && winbindd_num_clients()) {
                DEBUG(2, ("\tclient list:\n"));
                for(tmp = winbindd_client_list(); tmp; tmp = tmp->next) {
@@ -131,19 +140,24 @@ static void flush_caches(void)
 
 /* Handle the signal by unlinking socket and exiting */
 
-static void terminate(void)
+static void terminate(bool is_parent)
 {
-       char *path = NULL;
-
-       /* Remove socket file */
-       if (asprintf(&path, "%s/%s",
+       if (is_parent) {
+               /* When parent goes away we should
+                * remove the socket file. Not so
+                * when children terminate.
+                */ 
+               char *path = NULL;
+
+               if (asprintf(&path, "%s/%s",
                        get_winbind_pipe_dir(), WINBINDD_SOCKET_NAME) > 0) {
-               unlink(path);
-               SAFE_FREE(path);
+                       unlink(path);
+                       SAFE_FREE(path);
+               }
        }
 
        idmap_close();
-       
+
        trustdom_cache_shutdown();
 
 #if 0
@@ -159,35 +173,35 @@ static void terminate(void)
        exit(0);
 }
 
-static bool do_sigterm;
+static SIG_ATOMIC_T do_sigterm = 0;
 
 static void termination_handler(int signum)
 {
-       do_sigterm = True;
+       do_sigterm = 1;
        sys_select_signal(signum);
 }
 
-static bool do_sigusr2;
+static SIG_ATOMIC_T do_sigusr2 = 0;
 
 static void sigusr2_handler(int signum)
 {
-       do_sigusr2 = True;
+       do_sigusr2 = 1;
        sys_select_signal(SIGUSR2);
 }
 
-static bool do_sighup;
+static SIG_ATOMIC_T do_sighup = 0;
 
 static void sighup_handler(int signum)
 {
-       do_sighup = True;
+       do_sighup = 1;
        sys_select_signal(SIGHUP);
 }
 
-static bool do_sigchld;
+static SIG_ATOMIC_T do_sigchld = 0;
 
 static void sigchld_handler(int signum)
 {
-       do_sigchld = True;
+       do_sigchld = 1;
        sys_select_signal(SIGCHLD);
 }
 
@@ -200,7 +214,7 @@ static void msg_reload_services(struct messaging_context *msg,
 {
         /* Flush various caches */
        flush_caches();
-       reload_services_file();
+       reload_services_file((const char *) private_data);
 }
 
 /* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
@@ -210,7 +224,7 @@ static void msg_shutdown(struct messaging_context *msg,
                         struct server_id server_id,
                         DATA_BLOB *data)
 {
-       do_sigterm = True;
+       do_sigterm = 1;
 }
 
 
@@ -274,7 +288,7 @@ static struct winbindd_dispatch_table {
        void (*fn)(struct winbindd_cli_state *state);
        const char *winbindd_cmd_name;
 } dispatch_table[] = {
-       
+
        /* User functions */
 
        { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
@@ -326,12 +340,10 @@ static struct winbindd_dispatch_table {
        { WINBINDD_SID_TO_GID, winbindd_sid_to_gid, "SID_TO_GID" },
        { WINBINDD_UID_TO_SID, winbindd_uid_to_sid, "UID_TO_SID" },
        { WINBINDD_GID_TO_SID, winbindd_gid_to_sid, "GID_TO_SID" },
-#if 0   /* DISABLED until we fix the interface in Samba 3.0.26 --jerry */
-       { WINBINDD_SIDS_TO_XIDS, winbindd_sids_to_unixids, "SIDS_TO_XIDS" },
-#endif  /* end DISABLED */
        { WINBINDD_ALLOCATE_UID, winbindd_allocate_uid, "ALLOCATE_UID" },
        { WINBINDD_ALLOCATE_GID, winbindd_allocate_gid, "ALLOCATE_GID" },
        { WINBINDD_SET_MAPPING, winbindd_set_mapping, "SET_MAPPING" },
+       { WINBINDD_REMOVE_MAPPING, winbindd_remove_mapping, "REMOVE_MAPPING" },
        { WINBINDD_SET_HWM, winbindd_set_hwm, "SET_HWMS" },
 
        /* Miscellaneous */
@@ -356,7 +368,7 @@ static struct winbindd_dispatch_table {
 
        { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
        { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
-       
+
        /* End of list */
 
        { WINBINDD_NUM_CMDS, NULL, "NONE" }
@@ -523,7 +535,6 @@ static void request_len_recv(void *private_data, bool success);
 static void request_recv(void *private_data, bool success);
 static void request_main_recv(void *private_data, bool success);
 static void request_finished(struct winbindd_cli_state *state);
-void request_finished_cont(void *private_data, bool success);
 static void response_main_sent(void *private_data, bool success);
 static void response_extra_sent(void *private_data, bool success);
 
@@ -532,17 +543,13 @@ static void response_extra_sent(void *private_data, bool success)
        struct winbindd_cli_state *state =
                talloc_get_type_abort(private_data, struct winbindd_cli_state);
 
-       if (state->mem_ctx != NULL) {
-               talloc_destroy(state->mem_ctx);
-               state->mem_ctx = NULL;
-       }
+       TALLOC_FREE(state->mem_ctx);
 
        if (!success) {
                state->finished = True;
                return;
        }
 
-       SAFE_FREE(state->request.extra_data.data);
        SAFE_FREE(state->response.extra_data.data);
 
        setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
@@ -560,10 +567,7 @@ static void response_main_sent(void *private_data, bool success)
        }
 
        if (state->response.length == sizeof(state->response)) {
-               if (state->mem_ctx != NULL) {
-                       talloc_destroy(state->mem_ctx);
-                       state->mem_ctx = NULL;
-               }
+               TALLOC_FREE(state->mem_ctx);
 
                setup_async_read(&state->fd_event, &state->request,
                                 sizeof(uint32), request_len_recv, state);
@@ -577,6 +581,8 @@ static void response_main_sent(void *private_data, bool success)
 
 static void request_finished(struct winbindd_cli_state *state)
 {
+       /* Make sure request.extra_data is freed when finish processing a request */
+       SAFE_FREE(state->request.extra_data.data);
        setup_async_write(&state->fd_event, &state->response,
                          sizeof(state->response), response_main_sent, state);
 }
@@ -595,17 +601,6 @@ void request_ok(struct winbindd_cli_state *state)
        request_finished(state);
 }
 
-void request_finished_cont(void *private_data, bool success)
-{
-       struct winbindd_cli_state *state =
-               talloc_get_type_abort(private_data, struct winbindd_cli_state);
-
-       if (success)
-               request_ok(state);
-       else
-               request_error(state);
-}
-
 static void request_len_recv(void *private_data, bool success)
 {
        struct winbindd_cli_state *state =
@@ -690,9 +685,9 @@ static void new_connection(int listen_sock, bool privileged)
        struct winbindd_cli_state *state;
        socklen_t len;
        int sock;
-       
+
        /* Accept connection */
-       
+
        len = sizeof(sunaddr);
 
        do {
@@ -701,16 +696,16 @@ static void new_connection(int listen_sock, bool privileged)
 
        if (sock == -1)
                return;
-       
+
        DEBUG(6,("accepted socket %d\n", sock));
-       
+
        /* Create new connection structure */
-       
+
        if ((state = TALLOC_ZERO_P(NULL, struct winbindd_cli_state)) == NULL) {
                close(sock);
                return;
        }
-       
+
        state->sock = sock;
 
        state->last_access = time(NULL);        
@@ -725,7 +720,7 @@ static void new_connection(int listen_sock, bool privileged)
                         request_len_recv, state);
 
        /* Add to connection list */
-       
+
        winbindd_add_client(state);
 }
 
@@ -733,35 +728,37 @@ static void new_connection(int listen_sock, bool privileged)
 
 static void remove_client(struct winbindd_cli_state *state)
 {
+       char c = 0;
+
        /* It's a dead client - hold a funeral */
-       
+
        if (state == NULL) {
                return;
        }
-               
+
+       /* tell client, we are closing ... */
+       write(state->sock, &c, sizeof(c));
+
        /* Close socket */
-               
+
        close(state->sock);
-               
+
        /* Free any getent state */
-               
+
        free_getent_state(state->getpwent_state);
        free_getent_state(state->getgrent_state);
-               
+
        /* We may have some extra data that was not freed if the client was
           killed unexpectedly */
 
        SAFE_FREE(state->response.extra_data.data);
 
-       if (state->mem_ctx != NULL) {
-               talloc_destroy(state->mem_ctx);
-               state->mem_ctx = NULL;
-       }
+       TALLOC_FREE(state->mem_ctx);
 
        remove_fd_event(&state->fd_event);
-               
+
        /* Remove from list and free */
-               
+
        winbindd_remove_client(state);
        TALLOC_FREE(state);
 }
@@ -796,24 +793,24 @@ static bool remove_idle_client(void)
 }
 
 /* check if HUP has been received and reload files */
-void winbind_check_sighup(void)
+void winbind_check_sighup(const char *lfile)
 {
        if (do_sighup) {
 
                DEBUG(3, ("got SIGHUP\n"));
 
                flush_caches();
-               reload_services_file();
+               reload_services_file(lfile);
 
-               do_sighup = False;
+               do_sighup = 0;
        }
 }
 
 /* check if TERM has been received */
-void winbind_check_sigterm(void)
+void winbind_check_sigterm(bool is_parent)
 {
        if (do_sigterm)
-               terminate();
+               terminate(is_parent);
 }
 
 /* Process incoming clients on listen_sock.  We use a tricky non-blocking,
@@ -896,7 +893,7 @@ static void process_loop(void)
        }
 
        /* Call select */
-        
+
        selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
 
        if (selret == 0) {
@@ -947,7 +944,7 @@ static void process_loop(void)
                /* new, non-privileged connection */
                new_connection(listen_sock, False);
        }
-            
+
        if (FD_ISSET(listen_priv_sock, &r_fds)) {
                while (winbindd_num_clients() >
                       WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
@@ -975,18 +972,18 @@ static void process_loop(void)
 
        /* Check signal handling things */
 
-       winbind_check_sigterm();
-       winbind_check_sighup();
+       winbind_check_sigterm(true);
+       winbind_check_sighup(NULL);
 
        if (do_sigusr2) {
                print_winbindd_status();
-               do_sigusr2 = False;
+               do_sigusr2 = 0;
        }
 
        if (do_sigchld) {
                pid_t pid;
 
-               do_sigchld = False;
+               do_sigchld = 0;
 
                while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
                        winbind_child_died(pid);
@@ -1034,8 +1031,6 @@ int main(int argc, char **argv, char **envp)
 
        load_case_tables();
 
-       db_tdb2_setup_messaging(NULL, false);
-
        /* Initialise for running in non-root mode */
 
        sec_init();
@@ -1102,11 +1097,11 @@ int main(int argc, char **argv, char **envp)
        poptFreeContext(pc);
 
        if (!override_logfile) {
-               char *logfile = NULL;
-               if (asprintf(&logfile,"%s/log.winbindd",
+               char *lfile = NULL;
+               if (asprintf(&lfile,"%s/log.winbindd",
                                get_dyn_LOGFILEBASE()) > 0) {
-                       lp_set_logfile(logfile);
-                       SAFE_FREE(logfile);
+                       lp_set_logfile(lfile);
+                       SAFE_FREE(lfile);
                }
        }
        setup_logging("winbindd", log_stdout);
@@ -1123,18 +1118,15 @@ int main(int argc, char **argv, char **envp)
        /* Initialise messaging system */
 
        if (winbind_messaging_context() == NULL) {
-               DEBUG(0, ("unable to initialize messaging system\n"));
                exit(1);
        }
 
-       db_tdb2_setup_messaging(winbind_messaging_context(), true);
-
-       if (!reload_services_file()) {
+       if (!reload_services_file(NULL)) {
                DEBUG(0, ("error opening config file\n"));
                exit(1);
        }
 
-       if (!directory_exist(lp_lockdir(), NULL)) {
+       if (!directory_exist(lp_lockdir())) {
                mkdir(lp_lockdir(), 0755);
        }
 
@@ -1155,12 +1147,6 @@ int main(int argc, char **argv, char **envp)
 
        namecache_enable();
 
-       /* Winbind daemon initialisation */
-
-       if ( ! NT_STATUS_IS_OK(idmap_init_cache()) ) {
-               DEBUG(1, ("Could not init idmap cache!\n"));            
-       }
-
        /* Unblock all signals we are interested in as they may have been
           blocked by the parent process. */
 
@@ -1173,7 +1159,7 @@ int main(int argc, char **argv, char **envp)
        BlockSignals(False, SIGCHLD);
 
        /* Setup signal handlers */
-       
+
        CatchSignal(SIGINT, termination_handler);      /* Exit on these sigs */
        CatchSignal(SIGQUIT, termination_handler);
        CatchSignal(SIGTERM, termination_handler);
@@ -1242,12 +1228,17 @@ int main(int argc, char **argv, char **envp)
                           MSG_WINBIND_DUMP_DOMAIN_LIST,
                           winbind_msg_dump_domain_list);
 
+       /* Register handler for MSG_DEBUG. */
+       messaging_register(winbind_messaging_context(), NULL,
+                          MSG_DEBUG,
+                          winbind_msg_debug);
+
        netsamlogon_cache_init(); /* Non-critical */
-       
+
        /* clear the cached list of trusted domains */
 
        wcache_tdc_clear();     
-       
+
        if (!init_domain_list()) {
                DEBUG(0,("unable to initialize domain list\n"));
                exit(1);