Add SHOW LOGS command.

sql/ha_berkeley.cc:
  - add berkeley_show_logs()
sql/ha_berkeley.h:
  - add berkeley_show_logs()
sql/mysql_priv.h:
  - add show_logs()
sql/sql_lex.h:
  - add show_logs()
sql/sql_parse.cc:
  - add show_logs()
sql/sql_show.cc:
  - add show_logs()
sql/sql_yacc.yy:
  - add show_logs()
Docs/manual.texi:
  - add show_logs()
BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

BitKeeper/etc/logging_ok

@@ -6,3 +6,4 @@ paul@central.snake.net
 sasha@mysql.sashanet.com
 sasha@work.mysql.com
 serg@serg.mysql.com
+tim@cane.mysql.fi

Docs/manual.texi

@@ -19885,6 +19885,7 @@ or SHOW INDEX FROM tbl_name [FROM db_name]
 or SHOW TABLE STATUS [FROM db_name] [LIKE wild]
 or SHOW STATUS [LIKE wild]
 or SHOW VARIABLES [LIKE wild]
+or SHOW LOGS
 or SHOW [FULL] PROCESSLIST
 or SHOW GRANTS FOR user
 or SHOW CREATE TABLE table_name
@@ -19906,6 +19907,7 @@ and @samp{_} wild-card characters.
 * SHOW TABLE STATUS::           
 * SHOW STATUS::                 
 * SHOW VARIABLES::              
+* SHOW LOGS::              
 * SHOW PROCESSLIST::            
 * SHOW GRANTS::                 
 * SHOW CREATE TABLE::           
@@ -20150,7 +20152,7 @@ your @code{mysqld} @code{sort_buffer} variables is probably too small.
 tables.
 @end itemize
 
-@node SHOW VARIABLES, SHOW PROCESSLIST, SHOW STATUS, SHOW
+@node SHOW VARIABLES, SHOW LOGS, SHOW STATUS, SHOW
 @subsection SHOW VARIABLES
 
 @code{SHOW VARIABLES} shows the values of some @strong{MySQL} system
@@ -20610,11 +20612,27 @@ closing it. See also @code{interactive_timeout}.
 The manual section that describes tuning @strong{MySQL} contains some
 information of how to tune the above variables. @xref{Server parameters}.
 
+@node SHOW LOGS, SHOW PROCESSLIST, SHOW VARIABLES, SHOW
+@subsection SHOW Information About Log Files
+@code{SHOW LOGS} shows you status information about existing log
+files.  It currently only displays information about Berkeley DB log
+files.
+
+@itemize
+@item @code{File} shows the full path to the log file
+@item @code{Type} shows the type of the log file (@code{BDB} for Berkeley
+DB log files})
+@item @code{Status} shows the status of the log file (@code{FREE} if the
+file can be removed, or @code{IN USE} if the file is needed by the transaction
+subsystem)
+@end itemize
+
+
 @cindex threads, display
 @cindex processes, display
 @findex threads
 @findex PROCESSLIST
-@node SHOW PROCESSLIST, SHOW GRANTS, SHOW VARIABLES, SHOW
+@node SHOW PROCESSLIST, SHOW GRANTS, SHOW LOGS, SHOW
 @subsection SHOW Information About Connected Threads (Processes)
 
 @code{SHOW PROCESSLIST} shows you which threads are running.  You can

sql/ha_berkeley.cc

@@ -93,6 +93,7 @@ u_int32_t berkeley_lock_types[]=
 { DB_LOCK_DEFAULT, DB_LOCK_OLDEST, DB_LOCK_RANDOM };
 TYPELIB berkeley_lock_typelib= {array_elements(berkeley_lock_names),"",
 				berkeley_lock_names};
+static MEM_ROOT show_logs_root;
 
 static void berkeley_print_error(const char *db_errpfx, char *buffer);
 static byte* bdb_get_key(BDB_SHARE *share,uint *length,
@@ -210,6 +211,46 @@ int berkeley_rollback(THD *thd, void *trans)
   DBUG_RETURN(error);
 }
 
+static void *show_logs_alloc(size_t size)
+{
+  return alloc_root(&show_logs_root, size);
+}
+
+int berkeley_show_logs(THD *thd)
+{
+  char **all_logs, **free_logs;
+  String *packet= &thd->packet;
+  int error;
+  DBUG_ENTER("berkeley_show_logs");
+
+  init_alloc_root(&show_logs_root, 1024, 1024);
+  if ((error= log_archive(db_env, &all_logs, DB_ARCH_ABS|DB_ARCH_LOG, show_logs_alloc)) ||
+      (error= log_archive(db_env, &free_logs, DB_ARCH_ABS, show_logs_alloc)))
+  {
+    DBUG_PRINT("error", ("log_archive failed (error %d)", error));
+    db_env->err(db_env, error, "log_archive: DB_ARCH_ABS");
+    DBUG_RETURN(1);
+  }
+
+  for (char **a = all_logs, **f = free_logs; *a; ++a)
+  {
+    packet->length(0);
+    net_store_data(packet,*a);
+    net_store_data(packet,"BDB");
+    if (f && strcmp(*a, *f) == 0)
+    {
+      net_store_data(packet, SHOW_LOG_STATUS_FREE);
+      ++f;
+    }
+    else
+      net_store_data(packet, SHOW_LOG_STATUS_INUSE);
+
+    if (my_net_write(&thd->net,(char*) packet->ptr(),packet->length()))
+      DBUG_RETURN(1); /* purecov: inspected */
+  }
+  free_root(&show_logs_root,MYF(0));
+  DBUG_RETURN(0);
+}
 
 static void berkeley_print_error(const char *db_errpfx, char *buffer)
 {

sql/ha_berkeley.h

@@ -168,3 +168,4 @@ bool berkeley_end(void);
 bool berkeley_flush_logs(void);
 int berkeley_commit(THD *thd, void *trans);
 int berkeley_rollback(THD *thd, void *trans);
+int berkeley_show_logs(THD *thd);

sql/mysql_priv.h

@@ -175,6 +175,10 @@ void kill_one_thread(THD *thd, ulong id);
 
 #define BINLOG_DUMP_NON_BLOCK   1
 
+/* sql_show.cc:show_log_files() */
+#define SHOW_LOG_STATUS_FREE "FREE"
+#define SHOW_LOG_STATUS_INUSE "IN USE"
+
 /* Some portable defines */
 
 #define portable_sizeof_char_ptr 8
@@ -354,6 +358,7 @@ int mysqld_show_tables(THD *thd,const char *db,const char *wild);
 int mysqld_extend_show_tables(THD *thd,const char *db,const char *wild);
 int mysqld_show_fields(THD *thd,TABLE_LIST *table, const char *wild);
 int mysqld_show_keys(THD *thd, TABLE_LIST *table);
+int mysqld_show_logs(THD *thd);
 void mysqld_list_fields(THD *thd,TABLE_LIST *table, const char *wild);
 int mysqld_dump_create_info(THD *thd, TABLE *table, int fd = -1);
 int mysqld_show_create(THD *thd, TABLE_LIST *table_list);

sql/sql_lex.h

@@ -39,7 +39,7 @@ enum enum_sql_command {
   SQLCOM_DELETE, SQLCOM_TRUNCATE, SQLCOM_DROP_TABLE, SQLCOM_DROP_INDEX,
 
   SQLCOM_SHOW_DATABASES, SQLCOM_SHOW_TABLES, SQLCOM_SHOW_FIELDS,
-  SQLCOM_SHOW_KEYS, SQLCOM_SHOW_VARIABLES, SQLCOM_SHOW_STATUS,
+  SQLCOM_SHOW_KEYS, SQLCOM_SHOW_VARIABLES, SQLCOM_SHOW_LOGS, SQLCOM_SHOW_STATUS,
   SQLCOM_SHOW_PROCESSLIST, SQLCOM_SHOW_MASTER_STAT, SQLCOM_SHOW_SLAVE_STAT,
   SQLCOM_SHOW_GRANTS, SQLCOM_SHOW_CREATE,
 

sql/sql_parse.cc

@@ -1475,6 +1475,18 @@ mysql_execute_command(void)
     res= mysqld_show(thd, (lex->wild ? lex->wild->ptr() : NullS),
 		     init_vars);
     break;
+  case SQLCOM_SHOW_LOGS:
+#ifdef DONT_ALLOW_SHOW_COMMANDS
+    send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */
+    DBUG_VOID_RETURN;
+#else
+    {
+      if (grant_option && check_access(thd, FILE_ACL, any_db))
+	goto error;
+      res= mysqld_show_logs(thd);
+      break;
+    }
+#endif
   case SQLCOM_SHOW_TABLES:
 #ifdef DONT_ALLOW_SHOW_COMMANDS
     send_error(&thd->net,ER_NOT_ALLOWED_COMMAND);	/* purecov: inspected */

sql/sql_show.cc

@@ -24,6 +24,10 @@
 #include "sql_acl.h"
 #include <my_dir.h>
 
+#ifdef HAVE_BERKELEY_DB
+#include "ha_berkeley.h"			// For berkeley_show_logs
+#endif
+
 /* extern "C" pthread_mutex_t THR_LOCK_keycache; */
 
 static const char *grant_names[]={
@@ -402,6 +406,7 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild)
   restore_record(table,2);      // Get empty record
 
   Field **ptr,*field;
+  String *packet= &thd->packet;
   for (ptr=table->field; (field= *ptr) ; ptr++)
   {
     if (!wild || !wild[0] || !wild_case_compare(field->field_name,wild))
@@ -414,7 +419,7 @@ mysqld_show_fields(THD *thd, TABLE_LIST *table_list,const char *wild)
       {
         byte *pos;
         uint flags=field->flags;
-        String *packet= &thd->packet,type(tmp,sizeof(tmp));
+        String type(tmp,sizeof(tmp));
         uint col_access;
         bool null_default_value=0;
 
@@ -526,6 +531,30 @@ mysqld_show_create(THD *thd, TABLE_LIST *table_list)
 }
 
 
+#ifdef HAVE_BERKELEY_DB
+int
+mysqld_show_logs(THD *thd)
+{
+  DBUG_ENTER("mysqld_show_logs");
+
+  List<Item> field_list;
+  Item *item;
+  field_list.push_back(new Item_empty_string("File",FN_REFLEN));
+  field_list.push_back(new Item_empty_string("Type",10));
+  field_list.push_back(new Item_empty_string("Status",10));
+
+  if (send_fields(thd,field_list,1))
+    DBUG_RETURN(1);
+
+  if (berkeley_show_logs(thd))
+    DBUG_RETURN(1);
+
+  send_eof(&thd->net);
+  DBUG_RETURN(0);
+}
+#endif
+
+
 int
 mysqld_show_keys(THD *thd, TABLE_LIST *table_list)
 {
@@ -562,13 +591,13 @@ mysqld_show_keys(THD *thd, TABLE_LIST *table_list)
   if (send_fields(thd,field_list,1))
     DBUG_RETURN(1);
 
+  String *packet= &thd->packet;
   KEY *key_info=table->key_info;
   table->file->info(HA_STATUS_VARIABLE | HA_STATUS_NO_LOCK | HA_STATUS_TIME);
   for (uint i=0 ; i < table->keys ; i++,key_info++)
   {
     KEY_PART_INFO *key_part= key_info->key_part;
     char *end;
-    String *packet= &thd->packet;
     for (uint j=0 ; j < key_info->key_parts ; j++,key_part++)
     {
       packet->length(0);

sql/sql_yacc.yy

@@ -14,7 +14,7 @@
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
 
-/* sql_yacc.y */
+/* sql_yacc.yy */
 
 %{
 #define MYSQL_YACC
@@ -2179,6 +2179,8 @@ show_param:
 	  { Lex->sql_command= SQLCOM_SHOW_PROCESSLIST; Lex->verbose=1; }
 	| VARIABLES wild
 	  { Lex->sql_command= SQLCOM_SHOW_VARIABLES; }
+	| LOGS_SYM
+	  { Lex->sql_command= SQLCOM_SHOW_LOGS; }
 	| GRANTS FOR_SYM user
 	  { Lex->sql_command= SQLCOM_SHOW_GRANTS;
 	    Lex->grant_user=$3; Lex->grant_user->password.str=NullS; }