Cache the underlying filesystem capabilities at connection time.
[samba.git] / source3 / smbd / service.c
index 502fadedc75d7035322a1f37444e8ffa07e77e47..8e69a3b3817482bda2c88921049ef6ea7270fc20 100644 (file)
 
 extern userdom_struct current_user_info;
 
-static bool canonicalize_path(connection_struct *conn, pstring path)
+static bool canonicalize_connect_path(connection_struct *conn)
 {
 #ifdef REALPATH_TAKES_NULL
-       char *resolved_name = SMB_VFS_REALPATH(conn,path,NULL);
+       bool ret;
+       char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,NULL);
        if (!resolved_name) {
-               return False;
+               return false;
        }
-       pstrcpy(path, resolved_name);
+       ret = set_conn_connectpath(conn,resolved_name);
        SAFE_FREE(resolved_name);
-       return True;
+       return ret;
 #else
-#ifdef PATH_MAX
         char resolved_name_buf[PATH_MAX+1];
-#else
-        pstring resolved_name_buf;
-#endif
-       char *resolved_name = SMB_VFS_REALPATH(conn,path,resolved_name_buf);
+       char *resolved_name = SMB_VFS_REALPATH(conn,conn->connectpath,resolved_name_buf);
        if (!resolved_name) {
-               return False;
+               return false;
        }
-       pstrcpy(path, resolved_name);
-       return True;
+       return set_conn_connectpath(conn,resolved_name);
 #endif /* REALPATH_TAKES_NULL */
 }
 
@@ -52,12 +48,18 @@ static bool canonicalize_path(connection_struct *conn, pstring path)
  Observent people will notice a similarity between this and check_path_syntax :-).
 ****************************************************************************/
 
-void set_conn_connectpath(connection_struct *conn, const char *connectpath)
+bool set_conn_connectpath(connection_struct *conn, const char *connectpath)
 {
-       pstring destname;
-       char *d = destname;
+       char *destname;
+       char *d;
        const char *s = connectpath;
-        bool start_of_name_component = True;
+        bool start_of_name_component = true;
+
+       destname = SMB_STRDUP(connectpath);
+       if (!destname) {
+               return false;
+       }
+       d = destname;
 
        *d++ = '/'; /* Always start with root. */
 
@@ -142,7 +144,7 @@ void set_conn_connectpath(connection_struct *conn, const char *connectpath)
                                        break;
                        }
                }
-               start_of_name_component = False;
+               start_of_name_component = false;
        }
        *d = '\0';
 
@@ -155,6 +157,8 @@ void set_conn_connectpath(connection_struct *conn, const char *connectpath)
                lp_servicename(SNUM(conn)), destname ));
 
        string_set(&conn->connectpath, destname);
+       SAFE_FREE(destname);
+       return true;
 }
 
 /****************************************************************************
@@ -312,7 +316,6 @@ static int load_registry_service(const char *servicename)
                TALLOC_FREE(value);
        }
 
-       res = 0;
  error:
 
        TALLOC_FREE(key);
@@ -354,6 +357,7 @@ void load_registry_shares(void)
 int find_service(fstring service)
 {
        int iService;
+       TALLOC_CTX *frame = talloc_stackframe();
 
        all_string_sub(service,"\\","/",0);
 
@@ -361,7 +365,7 @@ int find_service(fstring service)
 
        /* now handle the special case of a home directory */
        if (iService < 0) {
-               char *phome_dir = get_user_home_dir(service);
+               char *phome_dir = get_user_home_dir(talloc_tos(), service);
 
                if(!phome_dir) {
                        /*
@@ -369,7 +373,8 @@ int find_service(fstring service)
                         * be a Windows to unix mapped user name.
                         */
                        if(map_username(service))
-                               phome_dir = get_user_home_dir(service);
+                               phome_dir = get_user_home_dir(
+                                       talloc_tos(), service);
                }
 
                DEBUG(3,("checking for home directory %s gave %s\n",service,
@@ -423,13 +428,17 @@ int find_service(fstring service)
                         * could get overwritten by the recursive find_service() call
                         * below. Fix from Josef Hinteregger <joehtg@joehtg.co.at>.
                         */
-                       pstring defservice;
-                       pstrcpy(defservice, pdefservice);
+                       char *defservice = SMB_STRDUP(pdefservice);
+
+                       if (!defservice) {
+                               goto fail;
+                       }
 
                        /* Disallow anything except explicit share names. */
                        if (strequal(defservice,HOMES_NAME) ||
                                        strequal(defservice, PRINTERS_NAME) ||
                                        strequal(defservice, "IPC$")) {
+                               SAFE_FREE(defservice);
                                goto fail;
                        }
 
@@ -438,6 +447,7 @@ int find_service(fstring service)
                                all_string_sub(service, "_","/",0);
                                iService = lp_add_service(service, iService);
                        }
+                       SAFE_FREE(defservice);
                }
        }
 
@@ -453,6 +463,8 @@ int find_service(fstring service)
        if (iService < 0)
                DEBUG(3,("find_service() failed to find service %s\n", service));
 
+       TALLOC_FREE(frame);
+
        return (iService);
 }
 
@@ -589,7 +601,7 @@ static NTSTATUS find_forced_group(bool force_user,
 
        if (!sid_to_gid(&group_sid, &gid)) {
                DEBUG(10, ("sid_to_gid(%s) for %s failed\n",
-                          sid_string_static(&group_sid), groupname));
+                          sid_string_dbg(&group_sid), groupname));
                goto done;
        }
 
@@ -643,6 +655,7 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
        fstring dev;
        int ret;
        char addr[INET6_ADDRSTRLEN];
+       bool on_err_call_dis_hook = false;
 
        *user = 0;
        fstrcpy(dev, pdev);
@@ -735,11 +748,12 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
                        *status = NT_STATUS_WRONG_PASSWORD;
                        return NULL;
                }
-               pass = Get_Pwnam(user);
+               pass = Get_Pwnam_alloc(talloc_tos(), user);
                status2 = create_token_from_username(conn->mem_ctx, pass->pw_name, True,
                                                     &conn->uid, &conn->gid,
                                                     &found_username,
                                                     &conn->nt_user_token);
+               TALLOC_FREE(pass);
                if (!NT_STATUS_IS_OK(status2)) {
                        conn_free(conn);
                        *status = status2;
@@ -758,8 +772,9 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
 
        add_session_user(user);
 
-       safe_strcpy(conn->client_address, client_addr(addr,sizeof(addr)), 
-                   sizeof(conn->client_address)-1);
+       safe_strcpy(conn->client_address,
+                       client_addr(get_client_fd(),addr,sizeof(addr)), 
+                       sizeof(conn->client_address)-1);
        conn->num_files_open = 0;
        conn->lastused = conn->lastused_count = time(NULL);
        conn->used = True;
@@ -875,7 +890,7 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
                        if (!sid_to_gid(sid, &gid)) {
                                DEBUG(10, ("Could not convert SID %s to gid, "
                                           "ignoring it\n",
-                                          sid_string_static(sid)));
+                                          sid_string_dbg(sid)));
                                continue;
                        }
                        if (!add_gid_to_array_unique(conn->mem_ctx, gid, &conn->groups,
@@ -889,16 +904,27 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
        }
 
        {
-               pstring s;
-               pstrcpy(s,lp_pathname(snum));
-               standard_sub_advanced(lp_servicename(SNUM(conn)), conn->user,
-                                     conn->connectpath, conn->gid,
-                                     get_current_username(),
-                                     current_user_info.domain,
-                                     s, sizeof(s));
-               set_conn_connectpath(conn,s);
+               char *s = talloc_sub_advanced(talloc_tos(),
+                                       lp_servicename(SNUM(conn)), conn->user,
+                                       conn->connectpath, conn->gid,
+                                       get_current_username(),
+                                       current_user_info.domain,
+                                       lp_pathname(snum));
+               if (!s) {
+                       conn_free(conn);
+                       *status = NT_STATUS_NO_MEMORY;
+                       return NULL;
+               }
+
+               if (!set_conn_connectpath(conn,s)) {
+                       TALLOC_FREE(s);
+                       conn_free(conn);
+                       *status = NT_STATUS_NO_MEMORY;
+                       return NULL;
+               }
                DEBUG(3,("Connect path is '%s' for service [%s]\n",s,
                         lp_servicename(snum)));
+               TALLOC_FREE(s);
        }
 
        /*
@@ -969,10 +995,15 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
         * depend on the realpath() pointer in the vfs table. JRA.
         */
        if (!lp_widelinks(snum)) {
-               pstring s;
-               pstrcpy(s,conn->connectpath);
-               canonicalize_path(conn, s);
-               set_conn_connectpath(conn,s);
+               if (!canonicalize_connect_path(conn)) {
+                       DEBUG(0, ("canonicalize_connect_path failed "
+                       "for service %s, path %s\n",
+                               lp_servicename(snum),
+                               conn->connectpath));
+                       conn_free(conn);
+                       *status = NT_STATUS_BAD_NETWORK_NAME;
+                       return NULL;
+               }
        }
 
        if ((!conn->printer) && (!conn->ipc)) {
@@ -1012,15 +1043,15 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
         * to below */
        /* execute any "root preexec = " line */
        if (*lp_rootpreexec(snum)) {
-               pstring cmd;
-               pstrcpy(cmd,lp_rootpreexec(snum));
-               standard_sub_advanced(lp_servicename(SNUM(conn)), conn->user,
-                                     conn->connectpath, conn->gid,
-                                     get_current_username(),
-                                     current_user_info.domain,
-                                     cmd, sizeof(cmd));
+               char *cmd = talloc_sub_advanced(talloc_tos(),
+                                       lp_servicename(SNUM(conn)), conn->user,
+                                       conn->connectpath, conn->gid,
+                                       get_current_username(),
+                                       current_user_info.domain,
+                                       lp_rootpreexec(snum));
                DEBUG(5,("cmd=%s\n",cmd));
                ret = smbrun(cmd,NULL);
+               TALLOC_FREE(cmd);
                if (ret != 0 && lp_rootpreexec_close(snum)) {
                        DEBUG(1,("root preexec gave %d - failing "
                                 "connection\n", ret));
@@ -1049,22 +1080,19 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
 
        /* execute any "preexec = " line */
        if (*lp_preexec(snum)) {
-               pstring cmd;
-               pstrcpy(cmd,lp_preexec(snum));
-               standard_sub_advanced(lp_servicename(SNUM(conn)), conn->user,
-                                     conn->connectpath, conn->gid,
-                                     get_current_username(),
-                                     current_user_info.domain,
-                                     cmd, sizeof(cmd));
+               char *cmd = talloc_sub_advanced(talloc_tos(),
+                                       lp_servicename(SNUM(conn)), conn->user,
+                                       conn->connectpath, conn->gid,
+                                       get_current_username(),
+                                       current_user_info.domain,
+                                       lp_preexec(snum));
                ret = smbrun(cmd,NULL);
+               TALLOC_FREE(cmd);
                if (ret != 0 && lp_preexec_close(snum)) {
                        DEBUG(1,("preexec gave %d - failing connection\n",
                                 ret));
-                       change_to_root_user();
-                       yield_connection(conn, lp_servicename(snum));
-                       conn_free(conn);
                        *status = NT_STATUS_ACCESS_DENIED;
-                       return NULL;
+                       goto err_root_exit;
                }
        }
 
@@ -1087,13 +1115,13 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
 
        if (SMB_VFS_CONNECT(conn, lp_servicename(snum), user) < 0) {
                DEBUG(0,("make_connection: VFS make connection failed!\n"));
-               change_to_root_user();
-               yield_connection(conn, lp_servicename(snum));
-               conn_free(conn);
                *status = NT_STATUS_UNSUCCESSFUL;
-               return NULL;
+               goto err_root_exit;
        }
 
+       /* Any error exit after here needs to call the disconnect hook. */
+       on_err_call_dis_hook = true;
+
        /* win2000 does not check the permissions on the directory
           during the tree connect, instead relying on permission
           check during individual operations. To match this behaviour
@@ -1111,13 +1139,8 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
                                 conn->connectpath, lp_servicename(snum),
                                 strerror(errno) ));
                }
-               change_to_root_user();
-               /* Call VFS disconnect hook */
-               SMB_VFS_DISCONNECT(conn);
-               yield_connection(conn, lp_servicename(snum));
-               conn_free(conn);
                *status = NT_STATUS_BAD_NETWORK_NAME;
-               return NULL;
+               goto err_root_exit;
        }
 
        string_set(&conn->origpath,conn->connectpath);
@@ -1129,14 +1152,34 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
                char *s = vfs_GetWd(ctx,s);
                if (!s) {
                        *status = map_nt_error_from_unix(errno);
-                       return NULL;
+                       TALLOC_FREE(ctx);
+                       goto err_root_exit;
+               }
+               if (!set_conn_connectpath(conn,s)) {
+                       *status = NT_STATUS_NO_MEMORY;
+                       TALLOC_FREE(ctx);
+                       goto err_root_exit;
                }
-               set_conn_connectpath(conn,s);
                vfs_ChDir(conn,conn->connectpath);
                TALLOC_FREE(ctx);
        }
 #endif
 
+       /* Figure out the characteristics of the underlying filesystem. This
+        * assumes that all the filesystem mounted withing a share path have
+        * the same characteristics, which is likely but not guaranteed.
+        */
+       {
+               vfs_statvfs_struct svfs;
+
+               conn->fs_capabilities =
+                   FILE_CASE_SENSITIVE_SEARCH | FILE_CASE_PRESERVED_NAMES;
+
+               if (SMB_VFS_STATVFS(conn, conn->connectpath, &svfs) == 0) {
+                       conn->fs_capabilities = svfs.FsCapabilities;
+               }
+       }
+
        /*
         * Print out the 'connected as' stuff here as we need
         * to know the effective uid and gid we will be using
@@ -1156,6 +1199,17 @@ static connection_struct *make_connection_snum(int snum, user_struct *vuser,
        /* we've finished with the user stuff - go back to root */
        change_to_root_user();
        return(conn);
+
+  err_root_exit:
+
+       change_to_root_user();
+       if (on_err_call_dis_hook) {
+               /* Call VFS disconnect hook */
+               SMB_VFS_DISCONNECT(conn);
+       }
+       yield_connection(conn, lp_servicename(snum));
+       conn_free(conn);
+       return NULL;
 }
 
 /***************************************************************************************
@@ -1303,7 +1357,7 @@ connection_struct *make_connection(const char *service_in, DATA_BLOB password,
 
                DEBUG(0,("%s (%s) couldn't find service %s\n",
                        get_remote_machine_name(),
-                       client_addr(addr,sizeof(addr)),
+                       client_addr(get_client_fd(),addr,sizeof(addr)),
                        service));
                *status = NT_STATUS_BAD_NETWORK_NAME;
                return NULL;
@@ -1356,28 +1410,28 @@ void close_cnum(connection_struct *conn, uint16 vuid)
        /* execute any "postexec = " line */
        if (*lp_postexec(SNUM(conn)) && 
            change_to_user(conn, vuid))  {
-               pstring cmd;
-               pstrcpy(cmd,lp_postexec(SNUM(conn)));
-               standard_sub_advanced(lp_servicename(SNUM(conn)), conn->user,
-                                     conn->connectpath, conn->gid,
-                                     get_current_username(),
-                                     current_user_info.domain,
-                                     cmd, sizeof(cmd));
+               char *cmd = talloc_sub_advanced(talloc_tos(),
+                                       lp_servicename(SNUM(conn)), conn->user,
+                                       conn->connectpath, conn->gid,
+                                       get_current_username(),
+                                       current_user_info.domain,
+                                       lp_postexec(SNUM(conn)));
                smbrun(cmd,NULL);
+               TALLOC_FREE(cmd);
                change_to_root_user();
        }
 
        change_to_root_user();
        /* execute any "root postexec = " line */
        if (*lp_rootpostexec(SNUM(conn)))  {
-               pstring cmd;
-               pstrcpy(cmd,lp_rootpostexec(SNUM(conn)));
-               standard_sub_advanced(lp_servicename(SNUM(conn)), conn->user,
-                                     conn->connectpath, conn->gid,
-                                     get_current_username(),
-                                     current_user_info.domain,
-                                     cmd, sizeof(cmd));
+               char *cmd = talloc_sub_advanced(talloc_tos(),
+                                       lp_servicename(SNUM(conn)), conn->user,
+                                       conn->connectpath, conn->gid,
+                                       get_current_username(),
+                                       current_user_info.domain,
+                                       lp_rootpostexec(SNUM(conn)));
                smbrun(cmd,NULL);
+               TALLOC_FREE(cmd);
        }
 
        conn_free(conn);