Bug#39289 libmysqld.a calls exit() upon error

Several functions (mostly in mysqld.cc) directly call
exit() function in case of errors, which is not a desired
behaviour expecially in the embedded-server library.

Fixed by making these functions return error sign instead
of exiting.

per-file comments:
  include/my_getopt.h
Bug#39289 libmysqld.a calls exit() upon error 
  added 'error' retvalue for my_getopt_register_get_addr

  libmysqld/lib_sql.cc
Bug#39289 libmysqld.a calls exit() upon error 
  unireg_clear() function implemented

  mysys/default.c
Bug#39289 libmysqld.a calls exit() upon error 
  error returned instead of exit() call

  mysys/mf_tempdir.c
Bug#39289 libmysqld.a calls exit() upon error 
  free_tmpdir() - fixed so it's not produce crash on uninitialized
    tmpdir structure

  mysys/my_getopt.c
Bug#39289 libmysqld.a calls exit() upon error 
  error returned instead of exit() call

  sql/mysql_priv.h
Bug#39289 libmysqld.a calls exit() upon error 
  unireg_abort definition fixed for the embedded server

  sql/mysqld.cc
Bug#39289 libmysqld.a calls exit() upon error 
  various functions fixed
  error returned instead of exit() call

include/my_getopt.h

@@ -72,7 +72,7 @@ extern void my_cleanup_options(const struct my_option *options);
 extern void my_print_help(const struct my_option *options);
 extern void my_print_variables(const struct my_option *options);
 extern void my_getopt_register_get_addr(uchar ** (*func_addr)(const char *, uint,
-							   const struct my_option *));
+                                        const struct my_option *, int *));
 
 ulonglong getopt_ull_limit_value(ulonglong num, const struct my_option *optp,
                                  my_bool *fix);

libmysqld/lib_sql.cc

@@ -43,6 +43,15 @@ extern char mysql_server_last_error[MYSQL_ERRMSG_SIZE];
 static my_bool emb_read_query_result(MYSQL *mysql);
 
 
+extern "C" void unireg_clear(int exit_code)
+{
+  DBUG_ENTER("unireg_clear");
+  clean_up(!opt_help && (exit_code || !opt_bootstrap)); /* purecov: inspected */
+  my_end(opt_endinfo ? MY_CHECK_ERROR | MY_GIVE_INFO : 0);
+  DBUG_VOID_RETURN;
+}
+
+
 /*
   Reads error information from the MYSQL_DATA and puts
   it into proper MYSQL members

mysys/default.c

@@ -144,6 +144,7 @@ static char *remove_end_comment(char *ptr);
   RETURN
     0  ok
     1  given cinf_file doesn't exist
+    2  out of memory
 
     The global variable 'my_defaults_group_suffix' is updated with value for
     --defaults_group_suffix
@@ -190,7 +191,7 @@ int my_search_option_files(const char *conf_file, int *argc, char ***argv,
     if (!(extra_groups= 
 	  (const char**)alloc_root(ctx->alloc,
                                    (2*group->count+1)*sizeof(char*))))
-      goto err;
+      DBUG_RETURN(2);
     
     for (i= 0; i < group->count; i++)
     {
@@ -199,7 +200,7 @@ int my_search_option_files(const char *conf_file, int *argc, char ***argv,
       
       len= strlen(extra_groups[i]);
       if (!(ptr= alloc_root(ctx->alloc, len+instance_len+1)))
-	goto err;
+        DBUG_RETURN(2);
       
       extra_groups[i+group->count]= ptr;
       
@@ -254,12 +255,11 @@ int my_search_option_files(const char *conf_file, int *argc, char ***argv,
     }
   }
 
-  DBUG_RETURN(error);
+  DBUG_RETURN(0);
 
 err:
   fprintf(stderr,"Fatal error in defaults handling. Program aborted\n");
-  exit(1);
-  return 0;					/* Keep compiler happy */
+  DBUG_RETURN(1);
 }
 
 

mysys/mf_tempdir.c

@@ -85,8 +85,11 @@ char *my_tmpdir(MY_TMPDIR *tmpdir)
 void free_tmpdir(MY_TMPDIR *tmpdir)
 {
   uint i;
-  for (i=0; i<=tmpdir->max; i++)
-    my_free(tmpdir->list[i], MYF(0));
+  if (tmpdir->full_list.elements)
+  {
+    for (i=0; i<=tmpdir->max; i++)
+      my_free(tmpdir->list[i], MYF(0));
+  }
   delete_dynamic(&tmpdir->full_list);
   pthread_mutex_destroy(&tmpdir->mutex);
 }

mysys/my_getopt.c

@@ -100,10 +100,10 @@ static void default_reporter(enum loglevel level,
   one. Call function 'get_one_option()' once for each option.
 */
 
-static uchar** (*getopt_get_addr)(const char *, uint, const struct my_option *);
+static uchar** (*getopt_get_addr)(const char *, uint, const struct my_option *, int *);
 
 void my_getopt_register_get_addr(uchar** (*func_addr)(const char *, uint,
-						    const struct my_option *))
+						    const struct my_option *, int *))
 {
   getopt_get_addr= func_addr;
 }
@@ -362,8 +362,12 @@ int handle_options(int *argc, char ***argv,
                                      my_progname, optp->name);
 	  return EXIT_NO_ARGUMENT_ALLOWED;
 	}
+        error= 0;
 	value= optp->var_type & GET_ASK_ADDR ?
-	  (*getopt_get_addr)(key_name, (uint) strlen(key_name), optp) : optp->value;
+	  (*getopt_get_addr)(key_name, (uint) strlen(key_name), optp, &error) :
+          optp->value;
+        if (error)
+          return error;
   
 	if (optp->arg_type == NO_ARG)
 	{
@@ -397,9 +401,10 @@ invalid value '%s'",
 				       my_progname, optp->name, optend);
 	      continue;
 	    }
-	    get_one_option(optp->id, optp,
-			   *((my_bool*) value) ?
-			   (char*) "1" : disabled_my_option);
+	    if (get_one_option(optp->id, optp,
+                               *((my_bool*) value) ?
+                               (char*) "1" : disabled_my_option))
+              return EXIT_UNSPECIFIED_ERROR;
 	    continue;
 	  }
 	  argument= optend;
@@ -457,7 +462,8 @@ invalid value '%s'",
 		  optp->arg_type == NO_ARG)
 	      {
 		*((my_bool*) optp->value)= (my_bool) 1;
-		get_one_option(optp->id, optp, argument);
+		if (get_one_option(optp->id, optp, argument))
+                  return EXIT_UNSPECIFIED_ERROR;
 		continue;
 	      }
 	      else if (optp->arg_type == REQUIRED_ARG ||
@@ -476,7 +482,8 @@ invalid value '%s'",
                   {
                     if (optp->var_type == GET_BOOL)
                       *((my_bool*) optp->value)= (my_bool) 1;
-                    get_one_option(optp->id, optp, argument);
+                    if (get_one_option(optp->id, optp, argument))
+                      return EXIT_UNSPECIFIED_ERROR;
                     continue;
                   }
 		  /* Check if there are more arguments after this one */
@@ -501,7 +508,8 @@ invalid value '%s'",
                                          my_progname, argument, optp->name);
 		return error;
 	      }
-	      get_one_option(optp->id, optp, argument);
+	      if (get_one_option(optp->id, optp, argument))
+                return EXIT_UNSPECIFIED_ERROR;
 	      break;
 	    }
 	  }
@@ -524,7 +532,8 @@ invalid value '%s'",
                                  my_progname, argument, optp->name);
 	return error;
       }
-      get_one_option(optp->id, optp, argument);
+      if (get_one_option(optp->id, optp, argument))
+        return EXIT_UNSPECIFIED_ERROR;
 
       (*argc)--; /* option handled (short or long), decrease argument count */
     }
@@ -1085,7 +1094,7 @@ static void init_variables(const struct my_option *options,
     if (options->value)
       init_one_value(options, options->value, options->def_value);
     if (options->var_type & GET_ASK_ADDR &&
-	(variable= (*getopt_get_addr)("", 0, options)))
+	(variable= (*getopt_get_addr)("", 0, options, 0)))
       init_one_value(options, variable, options->def_value);
   }
   DBUG_VOID_RETURN;
@@ -1189,7 +1198,7 @@ void my_print_variables(const struct my_option *options)
   for (optp= options; optp->id; optp++)
   {
     uchar* *value= (optp->var_type & GET_ASK_ADDR ?
-		  (*getopt_get_addr)("", 0, optp) : optp->value);
+		  (*getopt_get_addr)("", 0, optp, 0) : optp->value);
     if (value)
     {
       printf("%s ", optp->name);

sql/mysql_priv.h

@@ -2406,7 +2406,8 @@ extern "C" void unireg_abort(int exit_code) __attribute__((noreturn));
 void kill_delayed_threads(void);
 bool check_stack_overrun(THD *thd, long margin, uchar *dummy);
 #else
-#define unireg_abort(exit_code) DBUG_RETURN(exit_code)
+extern "C" void unireg_clear(int exit_code);
+#define unireg_abort(exit_code) do { unireg_clear(exit_code); DBUG_RETURN(exit_code); } while(0)
 inline void kill_delayed_threads(void) {}
 #define check_stack_overrun(A, B, C) 0
 #endif

sql/mysqld.cc

@@ -733,13 +733,13 @@ uint connection_count= 0;
 /* Function declarations */
 
 pthread_handler_t signal_hand(void *arg);
-static void mysql_init_variables(void);
-static void get_options(int *argc,char **argv);
+static int mysql_init_variables(void);
+static int get_options(int *argc,char **argv);
 extern "C" my_bool mysqld_get_one_option(int, const struct my_option *, char *);
 static void set_server_version(void);
 static int init_thread_environment();
 static char *get_relative_path(const char *path);
-static void fix_paths(void);
+static int fix_paths(void);
 pthread_handler_t handle_connections_sockets(void *arg);
 pthread_handler_t kill_server_thread(void *arg);
 static void bootstrap(FILE *file);
@@ -753,7 +753,7 @@ pthread_handler_t handle_connections_shared_memory(void *arg);
 pthread_handler_t handle_slave(void *arg);
 static ulong find_bit_type(const char *x, TYPELIB *bit_lib);
 static ulong find_bit_type_or_exit(const char *x, TYPELIB *bit_lib,
-                                   const char *option);
+                                   const char *option, int *error);
 static void clean_up(bool print_message);
 static int test_if_case_insensitive(const char *dir_name);
 
@@ -1187,7 +1187,8 @@ extern "C" void unireg_abort(int exit_code)
   my_end(opt_endinfo ? MY_CHECK_ERROR | MY_GIVE_INFO : 0);
   exit(exit_code); /* purecov: inspected */
 }
-#endif
+
+#endif /*EMBEDDED_LIBRARY*/
 
 
 void clean_up(bool print_message)
@@ -3141,12 +3142,12 @@ static int init_common_variables(const char *conf_file_name, int argc,
   if (!rpl_filter || !binlog_filter)
   {
     sql_perror("Could not allocate replication and binlog filters");
-    exit(1);
+    return 1;
   }
 
-  if (init_thread_environment())
+  if (init_thread_environment() ||
+      mysql_init_variables())
     return 1;
-  mysql_init_variables();
 
 #ifdef HAVE_TZNAME
   {
@@ -3222,7 +3223,8 @@ static int init_common_variables(const char *conf_file_name, int argc,
   load_defaults(conf_file_name, groups, &argc, &argv);
   defaults_argv=argv;
   defaults_argc=argc;
-  get_options(&defaults_argc, defaults_argv);
+  if (get_options(&defaults_argc, defaults_argv))
+    return 1;
   set_server_version();
 
   DBUG_PRINT("info",("%s  Ver %s for %s on %s\n",my_progname,
@@ -7347,6 +7349,8 @@ SHOW_VAR status_vars[]= {
   {NullS, NullS, SHOW_LONG}
 };
 
+#ifndef EMBEDDED_LIBRARY
+
 static void print_version(void)
 {
   set_server_version();
@@ -7358,7 +7362,6 @@ static void print_version(void)
 	 server_version,SYSTEM_TYPE,MACHINE_TYPE, MYSQL_COMPILATION_COMMENT);
 }
 
-#ifndef EMBEDDED_LIBRARY
 static void usage(void)
 {
   if (!(default_charset_info= get_charset_by_csname(default_character_set_name,
@@ -7423,8 +7426,9 @@ To see what values a running MySQL server is using, type\n\
     as these are initialized by my_getopt.
 */
 
-static void mysql_init_variables(void)
+static int mysql_init_variables(void)
 {
+  int error;
   /* Things reset to zero */
   opt_skip_slave_start= opt_reckless_slave = 0;
   mysql_home[0]= pidfile_name[0]= log_error_file[0]= 0;
@@ -7481,7 +7485,10 @@ static void mysql_init_variables(void)
   delay_key_write_options= (uint) DELAY_KEY_WRITE_ON;
   slave_exec_mode_options= 0;
   slave_exec_mode_options= (uint)
-    find_bit_type_or_exit(slave_exec_mode_str, &slave_exec_mode_typelib, NULL);
+    find_bit_type_or_exit(slave_exec_mode_str, &slave_exec_mode_typelib, NULL,
+                          &error);
+  if (error)
+    return 1;
   opt_specialflag= SPECIAL_ENGLISH;
   unix_sock= ip_sock= INVALID_SOCKET;
   mysql_home_ptr= mysql_home;
@@ -7504,7 +7511,7 @@ static void mysql_init_variables(void)
   key_caches.empty();
   if (!(dflt_key_cache= get_or_create_key_cache(default_key_cache_base.str,
                                                 default_key_cache_base.length)))
-    exit(1);
+    return 1;
   /* set key_cache_hash.default_value = dflt_key_cache */
   multi_keycache_init();
 
@@ -7647,6 +7654,7 @@ static void mysql_init_variables(void)
     tmpenv = DEFAULT_MYSQL_HOME;
   (void) strmake(mysql_home, tmpenv, sizeof(mysql_home)-1);
 #endif
+  return 0;
 }
 
 
@@ -7655,6 +7663,8 @@ mysqld_get_one_option(int optid,
                       const struct my_option *opt __attribute__((unused)),
                       char *argument)
 {
+  int error;
+
   switch(optid) {
   case '#':
 #ifndef DBUG_OFF
@@ -7700,7 +7710,9 @@ mysqld_get_one_option(int optid,
     break;
   case OPT_SLAVE_EXEC_MODE:
     slave_exec_mode_options= (uint)
-      find_bit_type_or_exit(argument, &slave_exec_mode_typelib, "");
+      find_bit_type_or_exit(argument, &slave_exec_mode_typelib, "", &error);
+    if (error)
+      return 1;
     break;
 #endif
   case OPT_SAFEMALLOC_MEM_LIMIT:
@@ -7709,9 +7721,11 @@ mysqld_get_one_option(int optid,
 #endif
     break;
 #include <sslopt-case.h>
+#ifndef EMBEDDED_LIBRARY
   case 'V':
     print_version();
     exit(0);
+#endif /*EMBEDDED_LIBRARY*/
   case 'W':
     if (!argument)
       global_system_variables.log_warnings++;
@@ -7763,18 +7777,16 @@ mysqld_get_one_option(int optid,
 
     if (!(p= strstr(argument, "->")))
     {
-      fprintf(stderr,
-	      "Bad syntax in replicate-rewrite-db - missing '->'!\n");
-      exit(1);
+      sql_print_error("Bad syntax in replicate-rewrite-db - missing '->'!\n");
+      return 1;
     }
     val= p--;
     while (my_isspace(mysqld_charset, *p) && p > argument)
       *p-- = 0;
     if (p == argument)
     {
-      fprintf(stderr,
-	      "Bad syntax in replicate-rewrite-db - empty FROM db!\n");
-      exit(1);
+      sql_print_error("Bad syntax in replicate-rewrite-db - empty FROM db!\n");
+      return 1;
     }
     *val= 0;
     val+= 2;
@@ -7782,9 +7794,8 @@ mysqld_get_one_option(int optid,
       *val++;
     if (!*val)
     {
-      fprintf(stderr,
-	      "Bad syntax in replicate-rewrite-db - empty TO db!\n");
-      exit(1);
+      sql_print_error("Bad syntax in replicate-rewrite-db - empty TO db!\n");
+      return 1;
     }
 
     rpl_filter->add_db_rewrite(key, val);
@@ -7812,8 +7823,8 @@ mysqld_get_one_option(int optid,
   {
     if (rpl_filter->add_do_table(argument))
     {
-      fprintf(stderr, "Could not add do table rule '%s'!\n", argument);
-      exit(1);
+      sql_print_error("Could not add do table rule '%s'!\n", argument);
+      return 1;
     }
     break;
   }
@@ -7821,8 +7832,8 @@ mysqld_get_one_option(int optid,
   {
     if (rpl_filter->add_wild_do_table(argument))
     {
-      fprintf(stderr, "Could not add do table rule '%s'!\n", argument);
-      exit(1);
+      sql_print_error("Could not add do table rule '%s'!\n", argument);
+      return 1;
     }
     break;
   }
@@ -7830,8 +7841,8 @@ mysqld_get_one_option(int optid,
   {
     if (rpl_filter->add_wild_ignore_table(argument))
     {
-      fprintf(stderr, "Could not add ignore table rule '%s'!\n", argument);
-      exit(1);
+      sql_print_error("Could not add ignore table rule '%s'!\n", argument);
+      return 1;
     }
     break;
   }
@@ -7839,8 +7850,8 @@ mysqld_get_one_option(int optid,
   {
     if (rpl_filter->add_ignore_table(argument))
     {
-      fprintf(stderr, "Could not add ignore table rule '%s'!\n", argument);
-      exit(1);
+      sql_print_error("Could not add ignore table rule '%s'!\n", argument);
+      return 1;
     }
     break;
   }
@@ -7863,7 +7874,9 @@ mysqld_get_one_option(int optid,
     {
       log_output_str= argument;
       log_output_options=
-        find_bit_type_or_exit(argument, &log_output_typelib, opt->name);
+        find_bit_type_or_exit(argument, &log_output_typelib, opt->name, &error);
+      if (error)
+        return 1;
   }
     break;
   }
@@ -7873,7 +7886,7 @@ mysqld_get_one_option(int optid,
     sql_perror("Event scheduler is not supported in embedded build.");
 #else
     if (Events::set_opt_event_scheduler(argument))
-	exit(1);
+      return 1;
 #endif
     break;
   case (int) OPT_SKIP_NEW:
@@ -7912,7 +7925,7 @@ mysqld_get_one_option(int optid,
   case (int) OPT_SKIP_NETWORKING:
 #if defined(__NETWARE__)
     sql_perror("Can't start server: skip-networking option is currently not supported on NetWare");
-    exit(1);
+    return 1;
 #endif
     opt_disable_networking=1;
     mysqld_port=0;
@@ -7942,14 +7955,14 @@ mysqld_get_one_option(int optid,
 	if (gethostname(myhostname,sizeof(myhostname)) < 0)
 	{
 	  sql_perror("Can't start server: cannot get my own hostname!");
-	  exit(1);
+          return 1;
 	}
 	ent=gethostbyname(myhostname);
       }
       if (!ent)
       {
 	sql_perror("Can't start server: cannot resolve hostname!");
-	exit(1);
+        return 1;
       }
       my_bind_addr = (ulong) ((in_addr*)ent->h_addr_list[0])->s_addr;
     }
@@ -8083,7 +8096,10 @@ mysqld_get_one_option(int optid,
     {
       myisam_recover_options_str=argument;
       myisam_recover_options=
-        find_bit_type_or_exit(argument, &myisam_recover_typelib, opt->name);
+        find_bit_type_or_exit(argument, &myisam_recover_typelib, opt->name,
+                              &error);
+      if (error)
+        return 1;
     }
     ha_open_options|=HA_OPEN_ABORT_IF_CRASHED;
     break;
@@ -8128,7 +8144,9 @@ mysqld_get_one_option(int optid,
   {
     sql_mode_str= argument;
     global_system_variables.sql_mode=
-      find_bit_type_or_exit(argument, &sql_mode_typelib, opt->name);
+      find_bit_type_or_exit(argument, &sql_mode_typelib, opt->name, &error);
+    if (error)
+      return 1;
     global_system_variables.sql_mode= fix_sql_mode(global_system_variables.
 						   sql_mode);
     break;
@@ -8147,7 +8165,7 @@ mysqld_get_one_option(int optid,
     if (ft_boolean_check_syntax_string((uchar*) argument))
     {
       fprintf(stderr, "Invalid ft-boolean-syntax string: %s\n", argument);
-      exit(1);
+      return 1;
     }
     strmake(ft_boolean_syntax, argument, sizeof(ft_boolean_syntax)-1);
     break;
@@ -8167,13 +8185,17 @@ mysqld_get_one_option(int optid,
 
 /** Handle arguments for multiple key caches. */
 
-extern "C" uchar **mysql_getopt_value(const char *keyname, uint key_length,
-                                      const struct my_option *option);
+extern "C" int mysql_getopt_value(uchar **value,
+                                  const char *keyname, uint key_length,
+                                  const struct my_option *option,
+                                  int *error);
 
-uchar* *
+static uchar* *
 mysql_getopt_value(const char *keyname, uint key_length,
-		   const struct my_option *option)
+		   const struct my_option *option, int *error)
 {
+  if (error)
+    *error= 0;
   switch (option->id) {
   case OPT_KEY_BUFFER_SIZE:
   case OPT_KEY_CACHE_BLOCK_SIZE:
@@ -8182,7 +8204,11 @@ mysql_getopt_value(const char *keyname, uint key_length,
   {
     KEY_CACHE *key_cache;
     if (!(key_cache= get_or_create_key_cache(keyname, key_length)))
-      exit(1);
+    {
+      if (error)
+        *error= EXIT_OUT_OF_MEMORY;
+      return 0;
+    }
     switch (option->id) {
     case OPT_KEY_BUFFER_SIZE:
       return (uchar**) &key_cache->param_buff_size;
@@ -8220,7 +8246,7 @@ void option_error_reporter(enum loglevel level, const char *format, ...)
   @todo
   - FIXME add EXIT_TOO_MANY_ARGUMENTS to "mysys_err.h" and return that code?
 */
-static void get_options(int *argc,char **argv)
+static int get_options(int *argc,char **argv)
 {
   int ho_error;
 
@@ -8234,7 +8260,7 @@ static void get_options(int *argc,char **argv)
 
   if ((ho_error= handle_options(argc, &argv, my_long_options,
                                 mysqld_get_one_option)))
-    exit(ho_error);
+    return ho_error;
   (*argc)++; /* add back one for the progname handle_options removes */
              /* no need to do this for argv as we are discarding it. */
 
@@ -8273,7 +8299,8 @@ static void get_options(int *argc,char **argv)
   max_allowed_packet= global_system_variables.max_allowed_packet;
   net_buffer_length= global_system_variables.net_buffer_length;
 #endif
-  fix_paths();
+  if (fix_paths())
+    return 1;
 
   /*
     Set some global variables from the global_system_variables
@@ -8300,7 +8327,7 @@ static void get_options(int *argc,char **argv)
 				  &global_system_variables.time_format) ||
       init_global_datetime_format(MYSQL_TIMESTAMP_DATETIME,
 				  &global_system_variables.datetime_format))
-    exit(1);
+    return 1;
 
 #ifdef EMBEDDED_LIBRARY
   one_thread_scheduler(&thread_scheduler);
@@ -8313,6 +8340,7 @@ static void get_options(int *argc,char **argv)
   else
     pool_of_threads_scheduler(&thread_scheduler);  /* purecov: tested */
 #endif
+  return 0;
 }
 
 
@@ -8376,7 +8404,7 @@ fn_format_relative_to_data_home(char * to, const char *name,
 }
 
 
-static void fix_paths(void)
+static int fix_paths(void)
 {
   char buff[FN_REFLEN],*pos;
   convert_dirname(mysql_home,mysql_home,NullS);
@@ -8423,12 +8451,12 @@ static void fix_paths(void)
   charsets_dir=mysql_charsets_dir;
 
   if (init_tmpdir(&mysql_tmpdir_list, opt_mysql_tmpdir))
-    exit(1);
+    return 1;
 #ifdef HAVE_REPLICATION
   if (!slave_load_tmpdir)
   {
     if (!(slave_load_tmpdir = (char*) my_strdup(mysql_tmpdir, MYF(MY_FAE))))
-      exit(1);
+      return 1;
   }
 #endif /* HAVE_REPLICATION */
   /*
@@ -8441,30 +8469,37 @@ static void fix_paths(void)
     my_free(opt_secure_file_priv, MYF(0));
     opt_secure_file_priv= my_strdup(buff, MYF(MY_FAE));
   }
+  return 0;
 }
 
 
 static ulong find_bit_type_or_exit(const char *x, TYPELIB *bit_lib,
-                                   const char *option)
+                                   const char *option, int *error)
 {
-  ulong res;
-
+  ulong result;
   const char **ptr;
   
-  if ((res= find_bit_type(x, bit_lib)) == ~(ulong) 0)
+  *error= 0;
+  if ((result= find_bit_type(x, bit_lib)) == ~(ulong) 0)
   {
+    char *buff= (char *) my_alloca(2048);
+    char *cbuf;
     ptr= bit_lib->type_names;
-    if (!*x)
-      fprintf(stderr, "No option given to %s\n", option);
-    else
-      fprintf(stderr, "Wrong option to %s. Option(s) given: %s\n", option, x);
-    fprintf(stderr, "Alternatives are: '%s'", *ptr);
+    cbuf= buff + ((!*x) ?
+      my_snprintf(buff, 2048, "No option given to %s\n", option) :
+      my_snprintf(buff, 2048, "Wrong option to %s. Option(s) given: %s\n",
+                  option, x));
+    cbuf+= my_snprintf(cbuf, 2048 - (cbuf-buff), "Alternatives are: '%s'", *ptr);
     while (*++ptr)
-      fprintf(stderr, ",'%s'", *ptr);
-    fprintf(stderr, "\n");
-    exit(1);
+      cbuf+= my_snprintf(cbuf, 2048 - (cbuf-buff), ",'%s'", *ptr);
+    my_snprintf(cbuf, 2048 - (cbuf-buff), "\n");
+    sql_perror(buff);
+    *error= 1;
+    my_afree(buff);
+    return 0;
   }
-  return res;
+
+  return result;
 }