InnoDB cleanup: Fix potential buffer overflows,

allow deletion of tablespaces whose names contain "'"


innobase/dict/dict0load.c:
  dict_check_tablespaces_or_store_max_id():
  Dynamically allocate memory for file name
innobase/fil/fil0fil.c:
  Dynamically allocate memory for file names
innobase/os/os0file.c:
  os_file_dirname(): allocate slightly less memory
  os_file_create_subdirs_if_needed(): compare more efficiently
innobase/row/row0mysql.c:
  Allow tablespaces with "'" in their names to be deleted
  Display identifiers with ut_print_name() or dict_index_name_print()

innobase/dict/dict0load.c

@@ -207,7 +207,6 @@ dict_check_tablespaces_or_store_max_id(
 	ulint		space_id;
 	ulint		max_space_id	= 0;
 	mtr_t		mtr;
-	char		name[OS_FILE_MAX_PATH];
 	
 	mutex_enter(&(dict_sys->mutex));
 
@@ -247,9 +246,7 @@ dict_check_tablespaces_or_store_max_id(
 
 		/* We found one */
 
-		ut_a(len < OS_FILE_MAX_PATH - 10);
-		ut_memcpy(name, field, len);
-		name[len] = '\0';
+		char*	name = mem_strdupl(field, len);
 
 		field = rec_get_nth_field(rec, 9, &len);
 		ut_a(len == 4);
@@ -268,6 +265,8 @@ dict_check_tablespaces_or_store_max_id(
 								TRUE, TRUE);
 		}
 
+		mem_free(name);
+
 		if (space_id > max_space_id) {
 			max_space_id = space_id;
 		}

innobase/os/os0file.c

@@ -2331,31 +2331,22 @@ os_file_dirname(
 				pathname */
 	const char*	path)	/* in: pathname */
 {
-	char*	dir;
-	int 	i, length, last_slash;
-
 	/* find the offset of the last slash */
-	length = ut_strlen(path);
-	for (i = length - 1; i >= 0 && path[i] != OS_FILE_PATH_SEPARATOR; i++);
-	last_slash = i;
-
-	if (last_slash < 0) {
+	const char* last_slash = strrchr(path, OS_FILE_PATH_SEPARATOR);
+	if (!last_slash) {
 		/* no slash in the path, return "." */
 		return(mem_strdup("."));
 	}
 
 	/* ok, there is a slash */
 
-	if (last_slash == 0) {
+	if (last_slash == path) {
 		/* last slash is the first char of the path */
 		return(mem_strdup("/"));
 	}
 
 	/* non-trivial directory component */
-	dir = mem_strdup(path);
-	dir[last_slash] = 0;
-
-	return(dir);
+	return(mem_strdupl(path, last_slash - path));
 }
 	
 /********************************************************************
@@ -2369,12 +2360,12 @@ os_file_create_subdirs_if_needed(
 	const char*	path)	/* in: path name */
 {
 	char*		subdir;
-	static char 	rootdir[2] = { OS_FILE_PATH_SEPARATOR, 0 };
 	ibool 		success, subdir_exists;
 	os_file_type_t	type;
 
 	subdir = os_file_dirname(path);
-	if (0 == strcmp(subdir, rootdir) || 0 == strcmp(subdir, ".")) {
+	if (strlen(subdir) == 1
+	    && (*subdir == OS_FILE_PATH_SEPARATOR || *subdir == '.')) {
 		/* subdir is root or cwd, nothing to do */
 		ut_free(subdir);
 		return(TRUE);

innobase/row/row0mysql.c

@@ -1951,7 +1951,37 @@ row_discard_tablespace_for_mysql(
 	que_t*		graph			= NULL;
 	ibool		success;
 	ulint		err;
-	char		buf[2 * OS_FILE_MAX_PATH];
+	char*		buf;
+
+	static const char discard_tablespace_proc1[] =
+	"PROCEDURE DISCARD_TABLESPACE_PROC () IS\n"
+	"old_id CHAR;\n"
+	"new_id CHAR;\n"
+	"new_id_low INT;\n"
+	"new_id_high INT;\n"
+	"table_name CHAR;\n"
+	"BEGIN\n"
+	"table_name := ";
+	static const char discard_tablespace_proc2[] =
+	";\n"
+	"new_id_high := %lu;\n"
+	"new_id_low := %lu;\n"
+   "new_id := CONCAT(TO_BINARY(new_id_high, 4), TO_BINARY(new_id_low, 4));\n"
+	"SELECT ID INTO old_id\n"
+	"FROM SYS_TABLES\n"
+	"WHERE NAME = table_name;\n"
+	"IF (SQL %% NOTFOUND) THEN\n"
+	"	COMMIT WORK;\n"
+	"	RETURN;\n"
+	"END IF;\n"
+	"UPDATE SYS_TABLES SET ID = new_id\n"
+	"WHERE ID = old_id;\n"
+	"UPDATE SYS_COLUMNS SET TABLE_ID = new_id\n"
+	"WHERE TABLE_ID = old_id;\n"
+	"UPDATE SYS_INDEXES SET TABLE_ID = new_id\n"
+	"WHERE TABLE_ID = old_id;\n"
+	"COMMIT WORK;\n"
+	"END;\n";
 
 	ut_ad(trx->mysql_thread_id == os_thread_get_curr_id());
 
@@ -1973,9 +2003,10 @@ row_discard_tablespace_for_mysql(
 
 	if (table->space == 0) {
 		ut_print_timestamp(stderr);
-		fprintf(stderr,
-"  InnoDB: Error: table %s\n"
-"InnoDB: is in the system tablespace 0 which cannot be discarded\n", name);
+		fputs("  InnoDB: Error: table ", stderr);
+		ut_print_name(stderr, name);
+		fputs("\n"
+"InnoDB: is in the system tablespace 0 which cannot be discarded\n", stderr);
 		err = DB_ERROR;
 
 		goto funct_exit;
@@ -1983,36 +2014,16 @@ row_discard_tablespace_for_mysql(
 
 	new_id = dict_hdr_get_new_id(DICT_HDR_TABLE_ID);
 
-	sprintf(buf, 
-	"PROCEDURE DISCARD_TABLESPACE_PROC () IS\n"
-	"old_id CHAR;\n"
-	"new_id CHAR;\n"
-	"new_id_low INT;\n"
-	"new_id_high INT;\n"
-	"table_name CHAR;\n"
-	"BEGIN\n"
-	"table_name :='%s';\n"
-	"new_id_high := %lu;\n"
-	"new_id_low := %lu;\n"
-   "new_id := CONCAT(TO_BINARY(new_id_high, 4), TO_BINARY(new_id_low, 4));\n"
-	"SELECT ID INTO old_id\n"
-	"FROM SYS_TABLES\n"
-	"WHERE NAME = table_name;\n"
-	"IF (SQL %% NOTFOUND) THEN\n"
-	"	COMMIT WORK;\n"
-	"	RETURN;\n"
-	"END IF;\n"
-	"UPDATE SYS_TABLES SET ID = new_id\n"
-	"WHERE ID = old_id;\n"
-	"UPDATE SYS_COLUMNS SET TABLE_ID = new_id\n"
-	"WHERE TABLE_ID = old_id;\n"
-	"UPDATE SYS_INDEXES SET TABLE_ID = new_id\n"
-	"WHERE TABLE_ID = old_id;\n"
-	"COMMIT WORK;\n"
-	"END;\n", name, (ulong) ut_dulint_get_high(new_id),
-		(ulong) ut_dulint_get_low(new_id));
+	buf = mem_alloc((sizeof discard_tablespace_proc1) +
+			(sizeof discard_tablespace_proc2) +
+			20 + ut_strlenq(name, '\''));
 
-	ut_a(strlen(buf) < 2 * OS_FILE_MAX_PATH);
+	memcpy(buf, discard_tablespace_proc1, sizeof discard_tablespace_proc1);
+	sprintf(ut_strcpyq(buf + (sizeof discard_tablespace_proc1 - 1),
+			'\'', name),
+		discard_tablespace_proc2,
+		(ulong) ut_dulint_get_high(new_id),
+		(ulong) ut_dulint_get_low(new_id));
 
 	graph = pars_sql(buf);
 
@@ -2126,9 +2137,10 @@ row_import_tablespace_for_mysql(
 
 	if (table->space == 0) {
 		ut_print_timestamp(stderr);
-		fprintf(stderr,
-"  InnoDB: Error: table %s\n"
-"InnoDB: is in the system tablespace 0 which cannot be imported\n", name);
+		fputs("  InnoDB: Error: table ", stderr);
+		ut_print_name(stderr, name);
+		fputs("\n"
+"InnoDB: is in the system tablespace 0 which cannot be imported\n", stderr);
 		err = DB_ERROR;
 
 		goto funct_exit;
@@ -2136,10 +2148,12 @@ row_import_tablespace_for_mysql(
 
 	if (!table->tablespace_discarded) {
 		ut_print_timestamp(stderr);
-		fprintf(stderr,
+		fputs(
 "  InnoDB: Error: you are trying to IMPORT a tablespace\n"
-"InnoDB: %s, though you have not called DISCARD on it yet\n"
-"InnoDB: during the lifetime of the mysqld process!\n", name);
+"InnoDB: ", stderr);
+		ut_print_name(stderr, name);
+		fputs(", though you have not called DISCARD on it yet\n"
+"InnoDB: during the lifetime of the mysqld process!\n", stderr);
 
 		err = DB_ERROR;
 
@@ -2491,8 +2505,10 @@ row_drop_table_for_mysql(
 			if (!success) {
 				ut_print_timestamp(stderr);
 				fprintf(stderr,
-"  InnoDB: Error: not able to delete tablespace %lu of table %s!\n",
-					(ulong) space_id, name);
+"  InnoDB: Error: not able to delete tablespace %lu of table ",
+					(ulong) space_id);
+				ut_print_name(stderr, name);
+				fputs("!\n", stderr);
 				err = DB_ERROR;
 			}
 		}
@@ -2757,15 +2773,14 @@ row_rename_table_for_mysql(
 		err = DB_TABLE_NOT_FOUND;
 	    	ut_print_timestamp(stderr);
 
-		fprintf(stderr, 
-     	"  InnoDB: Error: table %s\n"
-	"InnoDB: does not exist in the InnoDB internal\n"
+                fputs("  InnoDB: Error: table ", stderr);
+                ut_print_name(stderr, old_name);
+                fputs(" does not exist in the InnoDB internal\n"
      	"InnoDB: data dictionary though MySQL is trying to rename the table.\n"
      	"InnoDB: Have you copied the .frm file of the table to the\n"
 	"InnoDB: MySQL database directory from another database?\n"
 	"InnoDB: You can look for further help from section 15.1 of\n"
-        "InnoDB: http://www.innodb.com/ibman.html\n",
-				 old_name);
+        "InnoDB: http://www.innodb.com/ibman.php\n", stderr);
 		goto funct_exit;
 	}
 
@@ -2773,12 +2788,12 @@ row_rename_table_for_mysql(
 		err = DB_TABLE_NOT_FOUND;
 	    	ut_print_timestamp(stderr);
 
-		fprintf(stderr, 
-     	"  InnoDB: Error: table %s\n"
-	"InnoDB: does not have an .ibd file in the database directory.\n"
+                fputs("  InnoDB: Error: table ", stderr);
+                ut_print_name(stderr, old_name);
+                fputs(
+	" does not have an .ibd file in the database directory.\n"
 	"InnoDB: You can look for further help from section 15.1 of\n"
-        "InnoDB: http://www.innodb.com/ibman.html\n",
-				 old_name);
+        "InnoDB: http://www.innodb.com/ibman.php\n", stderr);
 		goto funct_exit;
 	}
 
@@ -2905,23 +2920,25 @@ row_rename_table_for_mysql(
 	if (err != DB_SUCCESS) {
 		if (err == DB_DUPLICATE_KEY) {
 	    		ut_print_timestamp(stderr);
-			fprintf(stderr,
-     "  InnoDB: Error: table %s exists in the InnoDB internal data\n"
-     "InnoDB: dictionary though MySQL is trying rename table %s to it.\n"
+                fputs("  InnoDB: Error: table ", stderr);
+                ut_print_name(stderr, new_name);
+                fputs(" exists in the InnoDB internal data\n"
+     "InnoDB: dictionary though MySQL is trying rename table ", stderr);
+                ut_print_name(stderr, old_name);
+		fputs(" to it.\n"
      "InnoDB: Have you deleted the .frm file and not used DROP TABLE?\n"
      "InnoDB: You can look for further help from section 15.1 of\n"
-     "InnoDB: http://www.innodb.com/ibman.html\n",
-			new_name, old_name);
-			fprintf(stderr,
-     "InnoDB: If table %s is a temporary table #sql..., then it can be that\n"
+	      "InnoDB: http://www.innodb.com/ibman.php\n"
+     "InnoDB: If table ", stderr);
+		ut_print_name(stderr, new_name);
+		fputs(" is a temporary table #sql..., then it can be that\n"
      "InnoDB: there are still queries running on the table, and it will be\n"
-     "InnoDB: dropped automatically when the queries end.\n", new_name);
-			fprintf(stderr,
+     "InnoDB: dropped automatically when the queries end.\n"
      "InnoDB: You can drop the orphaned table inside InnoDB by\n"
      "InnoDB: creating an InnoDB table with the same name in another\n"
      "InnoDB: database and moving the .frm file to the current database.\n"
      "InnoDB: Then MySQL thinks the table exists, and DROP TABLE will\n"
-     "InnoDB: succeed.\n");
+     "InnoDB: succeed.\n", stderr);
 		}
 		trx->error_state = DB_SUCCESS;
 		trx_general_rollback_for_mysql(trx, FALSE, NULL);
@@ -2937,9 +2954,12 @@ row_rename_table_for_mysql(
 			trx_general_rollback_for_mysql(trx, FALSE, NULL);
 			trx->error_state = DB_SUCCESS;
 			ut_print_timestamp(stderr);
-				fprintf(stderr,
-" InnoDB: Error in table rename, cannot rename %s to %s\n", old_name,
-								new_name);
+			fputs(" InnoDB: Error in table rename, cannot rename ",
+				stderr);
+			ut_print_name(stderr, old_name);
+			fputs(" to ", stderr);
+			ut_print_name(stderr, new_name);
+			putc('\n', stderr);
 			err = DB_ERROR;
 
 			goto funct_exit;
@@ -2958,11 +2978,14 @@ row_rename_table_for_mysql(
 
 			if (err != DB_SUCCESS) {
 	    			ut_print_timestamp(stderr);
-				fprintf(stderr,
-     "  InnoDB: Error: in ALTER TABLE table %s\n"
+				fputs("  InnoDB: Error: in ALTER TABLE ",
+					stderr);
+				ut_print_name(stderr, new_name);
+				fputs("\n"
 	"InnoDB: has or is referenced in foreign key constraints\n"
 	"InnoDB: which are not compatible with the new table definition.\n",
-     new_name);
+					stderr);
+
 				ut_a(dict_table_rename_in_cache(table,
 							old_name, FALSE));
 				trx->error_state = DB_SUCCESS;
@@ -3160,9 +3183,11 @@ row_check_table_for_mysql(
 
 				ret = DB_ERROR;
  
+				fputs("Error: ", stderr);
+				dict_index_name_print(stderr, index);
 				fprintf(stderr,
-		"Error: index %s contains %lu entries, should be %lu\n",
-					index->name, (ulong) n_rows,
+				" contains %lu entries, should be %lu\n",
+					(ulong) n_rows,
 					(ulong) n_rows_in_table);
 			}
 		}