--- /dev/null
+/*
+ Unix SMB/CIFS implementation.
+
+ Winbind daemon for ntdom nss module
+
+ Copyright (C) by Tim Potter 2000-2002
+ 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 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.
+*/
+
+#include "includes.h"
+#include "winbindd.h"
+
+BOOL opt_nocache = False;
+static BOOL interactive = False;
+
+extern BOOL override_logfile;
+
+/* Reload configuration */
+
+static BOOL reload_services_file(void)
+{
+ BOOL ret;
+
+ if (lp_loaded()) {
+ pstring fname;
+
+ pstrcpy(fname,lp_configfile());
+ if (file_exist(fname,NULL) && !strcsequal(fname,dyn_CONFIGFILE)) {
+ pstrcpy(dyn_CONFIGFILE,fname);
+ }
+ }
+
+ reopen_logs();
+ ret = lp_load(dyn_CONFIGFILE,False,False,True);
+
+ reopen_logs();
+ load_interfaces();
+
+ return(ret);
+}
+
+
+#if DUMP_CORE
+
+/**************************************************************************** **
+ Prepare to dump a core file - carefully!
+ **************************************************************************** */
+
+static BOOL dump_core(void)
+{
+ char *p;
+ pstring dname;
+ pstrcpy( dname, lp_logfile() );
+ if ((p=strrchr(dname,'/')))
+ *p=0;
+ pstrcat( dname, "/corefiles" );
+ mkdir( dname, 0700 );
+ sys_chown( dname, getuid(), getgid() );
+ chmod( dname, 0700 );
+ if ( chdir(dname) )
+ return( False );
+ umask( ~(0700) );
+
+#ifdef HAVE_GETRLIMIT
+#ifdef RLIMIT_CORE
+ {
+ struct rlimit rlp;
+ getrlimit( RLIMIT_CORE, &rlp );
+ rlp.rlim_cur = MAX( 4*1024*1024, rlp.rlim_cur );
+ setrlimit( RLIMIT_CORE, &rlp );
+ getrlimit( RLIMIT_CORE, &rlp );
+ DEBUG( 3, ( "Core limits now %d %d\n", (int)rlp.rlim_cur, (int)rlp.rlim_max ) );
+ }
+#endif
+#endif
+
+ DEBUG(0,("Dumping core in %s\n",dname));
+ abort();
+ return( True );
+} /* dump_core */
+#endif
+
+/**************************************************************************** **
+ Handle a fault..
+ **************************************************************************** */
+
+static void fault_quit(void)
+{
+#if DUMP_CORE
+ dump_core();
+#endif
+}
+
+static void winbindd_status(void)
+{
+ struct winbindd_cli_state *tmp;
+
+ 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) {
+ DEBUG(2, ("\t\tpid %lu, sock %d\n",
+ (unsigned long)tmp->pid, tmp->sock));
+ }
+ }
+}
+
+/* Print winbindd status to log file */
+
+static void print_winbindd_status(void)
+{
+ winbindd_status();
+}
+
+/* Flush client cache */
+
+static void flush_caches(void)
+{
+ /* We need to invalidate cached user list entries on a SIGHUP
+ otherwise cached access denied errors due to restrict anonymous
+ hang around until the sequence number changes. */
+
+ wcache_invalidate_cache();
+}
+
+/* Handle the signal by unlinking socket and exiting */
+
+static void terminate(void)
+{
+ pstring path;
+
+ idmap_close();
+
+ /* Remove socket file */
+ pstr_sprintf(path, "%s/%s",
+ WINBINDD_SOCKET_DIR, WINBINDD_SOCKET_NAME);
+ unlink(path);
+
+#if 0
+ if (interactive) {
+ TALLOC_CTX *mem_ctx = talloc_init("end_description");
+ char *description = talloc_describe_all(mem_ctx);
+
+ DEBUG(3, ("tallocs left:\n%s\n", description));
+ talloc_destroy(mem_ctx);
+ }
+#endif
+
+ exit(0);
+}
+
+static BOOL do_sigterm;
+
+static void termination_handler(int signum)
+{
+ do_sigterm = True;
+ sys_select_signal(signum);
+}
+
+static BOOL do_sigusr2;
+
+static void sigusr2_handler(int signum)
+{
+ do_sigusr2 = True;
+ sys_select_signal(SIGUSR2);
+}
+
+static BOOL do_sighup;
+
+static void sighup_handler(int signum)
+{
+ do_sighup = True;
+ sys_select_signal(SIGHUP);
+}
+
+static BOOL do_sigchld;
+
+static void sigchld_handler(int signum)
+{
+ do_sigchld = True;
+ sys_select_signal(SIGCHLD);
+}
+
+/* React on 'smbcontrol winbindd reload-config' in the same way as on SIGHUP*/
+static void msg_reload_services(int msg_type, struct process_id src, void *buf, size_t len)
+{
+ /* Flush various caches */
+ flush_caches();
+ reload_services_file();
+}
+
+/* React on 'smbcontrol winbindd shutdown' in the same way as on SIGTERM*/
+static void msg_shutdown(int msg_type, struct process_id src, void *buf, size_t len)
+{
+ do_sigterm = True;
+}
+
+static struct winbindd_dispatch_table {
+ enum winbindd_cmd cmd;
+ void (*fn)(struct winbindd_cli_state *state);
+ const char *winbindd_cmd_name;
+} dispatch_table[] = {
+
+ /* User functions */
+
+ { WINBINDD_GETPWNAM, winbindd_getpwnam, "GETPWNAM" },
+ { WINBINDD_GETPWUID, winbindd_getpwuid, "GETPWUID" },
+
+ { WINBINDD_SETPWENT, winbindd_setpwent, "SETPWENT" },
+ { WINBINDD_ENDPWENT, winbindd_endpwent, "ENDPWENT" },
+ { WINBINDD_GETPWENT, winbindd_getpwent, "GETPWENT" },
+
+ { WINBINDD_GETGROUPS, winbindd_getgroups, "GETGROUPS" },
+ { WINBINDD_GETUSERSIDS, winbindd_getusersids, "GETUSERSIDS" },
+ { WINBINDD_GETUSERDOMGROUPS, winbindd_getuserdomgroups,
+ "GETUSERDOMGROUPS" },
+
+ /* Group functions */
+
+ { WINBINDD_GETGRNAM, winbindd_getgrnam, "GETGRNAM" },
+ { WINBINDD_GETGRGID, winbindd_getgrgid, "GETGRGID" },
+ { WINBINDD_SETGRENT, winbindd_setgrent, "SETGRENT" },
+ { WINBINDD_ENDGRENT, winbindd_endgrent, "ENDGRENT" },
+ { WINBINDD_GETGRENT, winbindd_getgrent, "GETGRENT" },
+ { WINBINDD_GETGRLST, winbindd_getgrent, "GETGRLST" },
+
+ /* PAM auth functions */
+
+ { WINBINDD_PAM_AUTH, winbindd_pam_auth, "PAM_AUTH" },
+ { WINBINDD_PAM_AUTH_CRAP, winbindd_pam_auth_crap, "AUTH_CRAP" },
+ { WINBINDD_PAM_CHAUTHTOK, winbindd_pam_chauthtok, "CHAUTHTOK" },
+
+ /* Enumeration functions */
+
+ { WINBINDD_LIST_USERS, winbindd_list_users, "LIST_USERS" },
+ { WINBINDD_LIST_GROUPS, winbindd_list_groups, "LIST_GROUPS" },
+ { WINBINDD_LIST_TRUSTDOM, winbindd_list_trusted_domains,
+ "LIST_TRUSTDOM" },
+ { WINBINDD_SHOW_SEQUENCE, winbindd_show_sequence, "SHOW_SEQUENCE" },
+
+ /* SID related functions */
+
+ { WINBINDD_LOOKUPSID, winbindd_lookupsid, "LOOKUPSID" },
+ { WINBINDD_LOOKUPNAME, winbindd_lookupname, "LOOKUPNAME" },
+
+ /* Lookup related functions */
+
+ { WINBINDD_SID_TO_UID, winbindd_sid_to_uid, "SID_TO_UID" },
+ { 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" },
+ { WINBINDD_ALLOCATE_RID, winbindd_allocate_rid, "ALLOCATE_RID" },
+ { WINBINDD_ALLOCATE_RID_AND_GID, winbindd_allocate_rid_and_gid,
+ "ALLOCATE_RID_AND_GID" },
+
+ /* Miscellaneous */
+
+ { WINBINDD_CHECK_MACHACC, winbindd_check_machine_acct, "CHECK_MACHACC" },
+ { WINBINDD_PING, winbindd_ping, "PING" },
+ { WINBINDD_INFO, winbindd_info, "INFO" },
+ { WINBINDD_INTERFACE_VERSION, winbindd_interface_version,
+ "INTERFACE_VERSION" },
+ { WINBINDD_DOMAIN_NAME, winbindd_domain_name, "DOMAIN_NAME" },
+ { WINBINDD_DOMAIN_INFO, winbindd_domain_info, "DOMAIN_INFO" },
+ { WINBINDD_NETBIOS_NAME, winbindd_netbios_name, "NETBIOS_NAME" },
+ { WINBINDD_PRIV_PIPE_DIR, winbindd_priv_pipe_dir,
+ "WINBINDD_PRIV_PIPE_DIR" },
+ { WINBINDD_GETDCNAME, winbindd_getdcname, "GETDCNAME" },
+
+ /* WINS functions */
+
+ { WINBINDD_WINS_BYNAME, winbindd_wins_byname, "WINS_BYNAME" },
+ { WINBINDD_WINS_BYIP, winbindd_wins_byip, "WINS_BYIP" },
+
+ /* End of list */
+
+ { WINBINDD_NUM_CMDS, NULL, "NONE" }
+};
+
+static void process_request(struct winbindd_cli_state *state)
+{
+ struct winbindd_dispatch_table *table = dispatch_table;
+
+ /* Free response data - we may be interrupted and receive another
+ command before being able to send this data off. */
+
+ SAFE_FREE(state->response.extra_data);
+
+ ZERO_STRUCT(state->response);
+
+ state->response.result = WINBINDD_PENDING;
+ state->response.length = sizeof(struct winbindd_response);
+
+ state->mem_ctx = talloc_init("winbind request");
+ if (state->mem_ctx == NULL)
+ return;
+
+ /* Process command */
+
+ for (table = dispatch_table; table->fn; table++) {
+ if (state->request.cmd == table->cmd) {
+ DEBUG(10,("process_request: request fn %s\n",
+ table->winbindd_cmd_name ));
+ table->fn(state);
+ break;
+ }
+ }
+
+ if (!table->fn) {
+ DEBUG(10,("process_request: unknown request fn number %d\n",
+ (int)state->request.cmd ));
+ request_error(state);
+ }
+}
+
+/*
+ * A list of file descriptors being monitored by select in the main processing
+ * loop. fd_event->handler is called whenever the socket is readable/writable.
+ */
+
+static struct fd_event *fd_events = NULL;
+
+void add_fd_event(struct fd_event *ev)
+{
+ struct fd_event *match;
+
+ /* only add unique fd_event structs */
+
+ for (match=fd_events; match; match=match->next ) {
+#ifdef DEVELOPER
+ SMB_ASSERT( match != ev );
+#else
+ if ( match == ev )
+ return;
+#endif
+ }
+
+ DLIST_ADD(fd_events, ev);
+}
+
+void remove_fd_event(struct fd_event *ev)
+{
+ DLIST_REMOVE(fd_events, ev);
+}
+
+/*
+ * Handler for fd_events to complete a read/write request, set up by
+ * setup_async_read/setup_async_write.
+ */
+
+static void rw_callback(struct fd_event *event, int flags)
+{
+ size_t todo;
+ ssize_t done = 0;
+
+ todo = event->length - event->done;
+
+ if (event->flags & EVENT_FD_WRITE) {
+ SMB_ASSERT(flags == EVENT_FD_WRITE);
+ done = sys_write(event->fd,
+ &((char *)event->data)[event->done],
+ todo);
+
+ if (done <= 0) {
+ event->flags = 0;
+ event->finished(event->private_data, False);
+ return;
+ }
+ }
+
+ if (event->flags & EVENT_FD_READ) {
+ SMB_ASSERT(flags == EVENT_FD_READ);
+ done = sys_read(event->fd, &((char *)event->data)[event->done],
+ todo);
+
+ if (done <= 0) {
+ event->flags = 0;
+ event->finished(event->private_data, False);
+ return;
+ }
+ }
+
+ event->done += done;
+
+ if (event->done == event->length) {
+ event->flags = 0;
+ event->finished(event->private_data, True);
+ }
+}
+
+/*
+ * Request an async read/write on a fd_event structure. (*finished) is called
+ * when the request is completed or an error had occurred.
+ */
+
+void setup_async_read(struct fd_event *event, void *data, size_t length,
+ void (*finished)(void *private_data, BOOL success),
+ void *private_data)
+{
+ SMB_ASSERT(event->flags == 0);
+ event->data = data;
+ event->length = length;
+ event->done = 0;
+ event->handler = rw_callback;
+ event->finished = finished;
+ event->private_data = private_data;
+ event->flags = EVENT_FD_READ;
+}
+
+void setup_async_write(struct fd_event *event, void *data, size_t length,
+ void (*finished)(void *private_data, BOOL success),
+ void *private_data)
+{
+ SMB_ASSERT(event->flags == 0);
+ event->data = data;
+ event->length = length;
+ event->done = 0;
+ event->handler = rw_callback;
+ event->finished = finished;
+ event->private_data = private_data;
+ event->flags = EVENT_FD_WRITE;
+}
+
+/*
+ * This is the main event loop of winbind requests. It goes through a
+ * state-machine of 3 read/write requests, 4 if you have extra data to send.
+ *
+ * An idle winbind client has a read request of 4 bytes outstanding,
+ * finalizing function is request_len_recv, checking the length. request_recv
+ * then processes the packet. The processing function then at some point has
+ * to call request_finished which schedules sending the response.
+ */
+
+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);
+
+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;
+ }
+
+ if (!success) {
+ state->finished = True;
+ return;
+ }
+
+ SAFE_FREE(state->request.extra_data);
+ SAFE_FREE(state->response.extra_data);
+
+ setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
+ request_len_recv, state);
+}
+
+static void response_main_sent(void *private_data, BOOL success)
+{
+ struct winbindd_cli_state *state =
+ talloc_get_type_abort(private_data, struct winbindd_cli_state);
+
+ if (!success) {
+ state->finished = True;
+ return;
+ }
+
+ if (state->response.length == sizeof(state->response)) {
+ if (state->mem_ctx != NULL) {
+ talloc_destroy(state->mem_ctx);
+ state->mem_ctx = NULL;
+ }
+
+ setup_async_read(&state->fd_event, &state->request,
+ sizeof(uint32), request_len_recv, state);
+ return;
+ }
+
+ setup_async_write(&state->fd_event, state->response.extra_data,
+ state->response.length - sizeof(state->response),
+ response_extra_sent, state);
+}
+
+static void request_finished(struct winbindd_cli_state *state)
+{
+ setup_async_write(&state->fd_event, &state->response,
+ sizeof(state->response), response_main_sent, state);
+}
+
+void request_error(struct winbindd_cli_state *state)
+{
+ SMB_ASSERT(state->response.result == WINBINDD_PENDING);
+ state->response.result = WINBINDD_ERROR;
+ request_finished(state);
+}
+
+void request_ok(struct winbindd_cli_state *state)
+{
+ SMB_ASSERT(state->response.result == WINBINDD_PENDING);
+ state->response.result = WINBINDD_OK;
+ 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 =
+ talloc_get_type_abort(private_data, struct winbindd_cli_state);
+
+ if (!success) {
+ state->finished = True;
+ return;
+ }
+
+ if (*(uint32 *)(&state->request) != sizeof(state->request)) {
+ DEBUG(0,("request_len_recv: Invalid request size received: %d\n",
+ *(uint32 *)(&state->request)));
+ state->finished = True;
+ return;
+ }
+
+ setup_async_read(&state->fd_event, (uint32 *)(&state->request)+1,
+ sizeof(state->request) - sizeof(uint32),
+ request_main_recv, state);
+}
+
+static void request_main_recv(void *private_data, BOOL success)
+{
+ struct winbindd_cli_state *state =
+ talloc_get_type_abort(private_data, struct winbindd_cli_state);
+
+ if (!success) {
+ state->finished = True;
+ return;
+ }
+
+ if (state->request.extra_len == 0) {
+ state->request.extra_data = NULL;
+ request_recv(state, True);
+ return;
+ }
+
+ if ((!state->privileged) &&
+ (state->request.extra_len > WINBINDD_MAX_EXTRA_DATA)) {
+ DEBUG(3, ("Got request with %d bytes extra data on "
+ "unprivileged socket\n", (int)state->request.extra_len));
+ state->request.extra_data = NULL;
+ state->finished = True;
+ return;
+ }
+
+ state->request.extra_data =
+ SMB_MALLOC_ARRAY(char, state->request.extra_len + 1);
+
+ if (state->request.extra_data == NULL) {
+ DEBUG(0, ("malloc failed\n"));
+ state->finished = True;
+ return;
+ }
+
+ /* Ensure null termination */
+ state->request.extra_data[state->request.extra_len] = '\0';
+
+ setup_async_read(&state->fd_event, state->request.extra_data,
+ state->request.extra_len, request_recv, state);
+}
+
+static void request_recv(void *private_data, BOOL success)
+{
+ struct winbindd_cli_state *state =
+ talloc_get_type_abort(private_data, struct winbindd_cli_state);
+
+ if (!success) {
+ state->finished = True;
+ return;
+ }
+
+ process_request(state);
+}
+
+/* Process a new connection by adding it to the client connection list */
+
+static void new_connection(int listen_sock, BOOL privileged)
+{
+ struct sockaddr_un sunaddr;
+ struct winbindd_cli_state *state;
+ socklen_t len;
+ int sock;
+
+ /* Accept connection */
+
+ len = sizeof(sunaddr);
+
+ do {
+ sock = accept(listen_sock, (struct sockaddr *)&sunaddr, &len);
+ } while (sock == -1 && errno == EINTR);
+
+ 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)
+ return;
+
+ state->sock = sock;
+
+ state->last_access = time(NULL);
+
+ state->privileged = privileged;
+
+ state->fd_event.fd = state->sock;
+ state->fd_event.flags = 0;
+ add_fd_event(&state->fd_event);
+
+ setup_async_read(&state->fd_event, &state->request, sizeof(uint32),
+ request_len_recv, state);
+
+ /* Add to connection list */
+
+ winbindd_add_client(state);
+}
+
+/* Remove a client connection from client connection list */
+
+static void remove_client(struct winbindd_cli_state *state)
+{
+ /* It's a dead client - hold a funeral */
+
+ if (state != NULL) {
+
+ /* 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);
+
+ if (state->mem_ctx != NULL) {
+ talloc_destroy(state->mem_ctx);
+ state->mem_ctx = NULL;
+ }
+
+ remove_fd_event(&state->fd_event);
+
+ /* Remove from list and free */
+
+ winbindd_remove_client(state);
+ talloc_free(state);
+ }
+}
+
+
+/* Shutdown client connection which has been idle for the longest time */
+
+static BOOL remove_idle_client(void)
+{
+ struct winbindd_cli_state *state, *remove_state = NULL;
+ time_t last_access = 0;
+ int nidle = 0;
+
+ for (state = winbindd_client_list(); state; state = state->next) {
+ if (state->response.result != WINBINDD_PENDING &&
+ !state->getpwent_state && !state->getgrent_state) {
+ nidle++;
+ if (!last_access || state->last_access < last_access) {
+ last_access = state->last_access;
+ remove_state = state;
+ }
+ }
+ }
+
+ if (remove_state) {
+ DEBUG(5,("Found %d idle client connections, shutting down sock %d, pid %u\n",
+ nidle, remove_state->sock, (unsigned int)remove_state->pid));
+ remove_client(remove_state);
+ return True;
+ }
+
+ return False;
+}
+
+/* Process incoming clients on listen_sock. We use a tricky non-blocking,
+ non-forking, non-threaded model which allows us to handle many
+ simultaneous connections while remaining impervious to many denial of
+ service attacks. */
+
+static void process_loop(void)
+{
+ struct winbindd_cli_state *state;
+ struct fd_event *ev;
+ fd_set r_fds, w_fds;
+ int maxfd, listen_sock, listen_priv_sock, selret;
+ struct timeval timeout;
+
+ /* We'll be doing this a lot */
+
+ /* Handle messages */
+
+ message_dispatch();
+
+ /* refresh the trusted domain cache */
+
+ rescan_trusted_domains();
+
+ /* Free up temporary memory */
+
+ lp_talloc_free();
+ main_loop_talloc_free();
+
+ /* Initialise fd lists for select() */
+
+ listen_sock = open_winbindd_socket();
+ listen_priv_sock = open_winbindd_priv_socket();
+
+ if (listen_sock == -1 || listen_priv_sock == -1) {
+ perror("open_winbind_socket");
+ exit(1);
+ }
+
+ maxfd = MAX(listen_sock, listen_priv_sock);
+
+ FD_ZERO(&r_fds);
+ FD_ZERO(&w_fds);
+ FD_SET(listen_sock, &r_fds);
+ FD_SET(listen_priv_sock, &r_fds);
+
+ timeout.tv_sec = WINBINDD_ESTABLISH_LOOP;
+ timeout.tv_usec = 0;
+
+ /* Set up client readers and writers */
+
+ state = winbindd_client_list();
+
+ while (state) {
+
+ struct winbindd_cli_state *next = state->next;
+
+ /* Dispose of client connection if it is marked as
+ finished */
+
+ if (state->finished)
+ remove_client(state);
+
+ state = next;
+ }
+
+ for (ev = fd_events; ev; ev = ev->next) {
+ if (ev->flags & EVENT_FD_READ) {
+ FD_SET(ev->fd, &r_fds);
+ maxfd = MAX(ev->fd, maxfd);
+ }
+ if (ev->flags & EVENT_FD_WRITE) {
+ FD_SET(ev->fd, &w_fds);
+ maxfd = MAX(ev->fd, maxfd);
+ }
+ }
+
+ /* Call select */
+
+ selret = sys_select(maxfd + 1, &r_fds, &w_fds, NULL, &timeout);
+
+ if (selret == 0)
+ goto no_fds_ready;
+
+ if ((selret == -1 && errno != EINTR) || selret == 0) {
+
+ /* Select error, something is badly wrong */
+
+ perror("select");
+ exit(1);
+ }
+
+ ev = fd_events;
+ while (ev != NULL) {
+ struct fd_event *next = ev->next;
+ int flags = 0;
+ if (FD_ISSET(ev->fd, &r_fds))
+ flags |= EVENT_FD_READ;
+ if (FD_ISSET(ev->fd, &w_fds))
+ flags |= EVENT_FD_WRITE;
+ if (flags)
+ ev->handler(ev, flags);
+ ev = next;
+ }
+
+ if (FD_ISSET(listen_sock, &r_fds)) {
+ while (winbindd_num_clients() >
+ WINBINDD_MAX_SIMULTANEOUS_CLIENTS - 1) {
+ DEBUG(5,("winbindd: Exceeding %d client "
+ "connections, removing idle "
+ "connection.\n",
+ WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
+ if (!remove_idle_client()) {
+ DEBUG(0,("winbindd: Exceeding %d "
+ "client connections, no idle "
+ "connection found\n",
+ WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
+ break;
+ }
+ }
+ /* 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) {
+ DEBUG(5,("winbindd: Exceeding %d client "
+ "connections, removing idle "
+ "connection.\n",
+ WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
+ if (!remove_idle_client()) {
+ DEBUG(0,("winbindd: Exceeding %d "
+ "client connections, no idle "
+ "connection found\n",
+ WINBINDD_MAX_SIMULTANEOUS_CLIENTS));
+ break;
+ }
+ }
+ /* new, privileged connection */
+ new_connection(listen_priv_sock, True);
+ }
+
+ no_fds_ready:
+
+#if 0
+ winbindd_check_cache_size(time(NULL));
+#endif
+
+ /* Check signal handling things */
+
+ if (do_sigterm)
+ terminate();
+
+ if (do_sighup) {
+
+ DEBUG(3, ("got SIGHUP\n"));
+
+ msg_reload_services(MSG_SMB_CONF_UPDATED, pid_to_procid(0), NULL, 0);
+ do_sighup = False;
+ }
+
+ if (do_sigusr2) {
+ print_winbindd_status();
+ do_sigusr2 = False;
+ }
+
+ if (do_sigchld) {
+ pid_t pid;
+
+ do_sigchld = False;
+
+ while ((pid = sys_waitpid(-1, NULL, WNOHANG)) > 0) {
+ winbind_child_died(pid);
+ }
+ }
+}
+
+/* Main function */
+
+struct winbindd_state server_state; /* Server state information */
+
+int main(int argc, char **argv)
+{
+ pstring logfile;
+ static BOOL Fork = True;
+ static BOOL log_stdout = False;
+ struct poptOption long_options[] = {
+ POPT_AUTOHELP
+ { "stdout", 'S', POPT_ARG_VAL, &log_stdout, True, "Log to stdout" },
+ { "foreground", 'F', POPT_ARG_VAL, &Fork, False, "Daemon in foreground mode" },
+ { "interactive", 'i', POPT_ARG_NONE, NULL, 'i', "Interactive mode" },
+ { "no-caching", 'n', POPT_ARG_VAL, &opt_nocache, True, "Disable caching" },
+ POPT_COMMON_SAMBA
+ POPT_TABLEEND
+ };
+ poptContext pc;
+ int opt;
+
+ /* glibc (?) likes to print "User defined signal 1" and exit if a
+ SIGUSR[12] is received before a handler is installed */
+
+ CatchSignal(SIGUSR1, SIG_IGN);
+ CatchSignal(SIGUSR2, SIG_IGN);
+
+ fault_setup((void (*)(void *))fault_quit );
+
+ load_case_tables();
+
+ /* Initialise for running in non-root mode */
+
+ sec_init();
+
+ set_remote_machine_name("winbindd", False);
+
+ /* Set environment variable so we don't recursively call ourselves.
+ This may also be useful interactively. */
+
+ setenv(WINBINDD_DONT_ENV, "1", 1);
+
+ /* Initialise samba/rpc client stuff */
+
+ pc = poptGetContext("winbindd", argc, (const char **)argv, long_options,
+ POPT_CONTEXT_KEEP_FIRST);
+
+ while ((opt = poptGetNextOpt(pc)) != -1) {
+ switch (opt) {
+ /* Don't become a daemon */
+ case 'i':
+ interactive = True;
+ log_stdout = True;
+ Fork = False;
+ break;
+ }
+ }
+
+
+ if (log_stdout && Fork) {
+ printf("Can't log to stdout (-S) unless daemon is in foreground +(-F) or interactive (-i)\n");
+ poptPrintUsage(pc, stderr, 0);
+ exit(1);
+ }
+
+ if (!override_logfile) {
+ pstr_sprintf(logfile, "%s/log.winbindd", dyn_LOGFILEBASE);
+ lp_set_logfile(logfile);
+ }
+ setup_logging("winbindd", log_stdout);
+ reopen_logs();
+
+ DEBUG(1, ("winbindd version %s started.\n", SAMBA_VERSION_STRING) );
+ DEBUGADD( 1, ( "Copyright The Samba Team 2000-2004\n" ) );
+
+ if (!reload_services_file()) {
+ DEBUG(0, ("error opening config file\n"));
+ exit(1);
+ }
+
+ /* Setup names. */
+
+ if (!init_names())
+ exit(1);
+
+ load_interfaces();
+
+ if (!secrets_init()) {
+
+ DEBUG(0,("Could not initialize domain trust account secrets. Giving up\n"));
+ return False;
+ }
+
+ /* Enable netbios namecache */
+
+ namecache_enable();
+
+ /* Check winbindd parameters are valid */
+
+ ZERO_STRUCT(server_state);
+
+ /* Winbind daemon initialisation */
+
+ if ( (!winbindd_param_init()) || (!winbindd_upgrade_idmap()) ||
+ (!idmap_init(lp_idmap_backend())) ) {
+ DEBUG(1, ("Could not init idmap -- netlogon proxy only\n"));
+ idmap_set_proxyonly();
+ }
+
+ /* Unblock all signals we are interested in as they may have been
+ blocked by the parent process. */
+
+ BlockSignals(False, SIGINT);
+ BlockSignals(False, SIGQUIT);
+ BlockSignals(False, SIGTERM);
+ BlockSignals(False, SIGUSR1);
+ BlockSignals(False, SIGUSR2);
+ BlockSignals(False, SIGHUP);
+ BlockSignals(False, SIGCHLD);
+
+ /* Setup signal handlers */
+
+ CatchSignal(SIGINT, termination_handler); /* Exit on these sigs */
+ CatchSignal(SIGQUIT, termination_handler);
+ CatchSignal(SIGTERM, termination_handler);
+ CatchSignal(SIGCHLD, sigchld_handler);
+
+ CatchSignal(SIGPIPE, SIG_IGN); /* Ignore sigpipe */
+
+ CatchSignal(SIGUSR2, sigusr2_handler); /* Debugging sigs */
+ CatchSignal(SIGHUP, sighup_handler);
+
+ if (!interactive)
+ become_daemon(Fork);
+
+ pidfile_create("winbindd");
+
+#if HAVE_SETPGID
+ /*
+ * If we're interactive we want to set our own process group for
+ * signal management.
+ */
+ if (interactive)
+ setpgid( (pid_t)0, (pid_t)0);
+#endif
+
+ TimeInit();
+
+ /* Initialise messaging system */
+
+ if (!message_init()) {
+ DEBUG(0, ("unable to initialise messaging system\n"));
+ exit(1);
+ }
+
+ /* React on 'smbcontrol winbindd reload-config' in the same way
+ as to SIGHUP signal */
+ message_register(MSG_SMB_CONF_UPDATED, msg_reload_services);
+ message_register(MSG_SHUTDOWN, msg_shutdown);
+
+ poptFreeContext(pc);
+
+ netsamlogon_cache_init(); /* Non-critical */
+
+ init_domain_list();
+
+ init_idmap_child();
+
+ /* Loop waiting for requests */
+
+ while (1)
+ process_loop();
+
+ trustdom_cache_shutdown();
+
+ return 0;
+}
projects / samba / blobdiff