CSC#4944: Adding File_size to output of SHOW BINARY lOGS

mysql-test/r/rpl_log.result:
  Adding File_size to output of SHOW BINARY lOGS
mysql-test/r/rpl_rotate_logs.result:
  Adding File_size to output of SHOW BINARY lOGS
sql/sql_repl.cc:
  Adding File_size to output of SHOW BINARY lOGS

mysql-test/r/rpl_log.result

@@ -67,14 +67,14 @@ master-bin.000002	110	Query	1	110	use `test`; create table t1 (n int)
 master-bin.000002	168	Query	1	168	use `test`; insert into t1 values (1)
 master-bin.000002	228	Query	1	228	use `test`; drop table t1
 show binary logs;
-Log_name
-master-bin.000001
-master-bin.000002
+Log_name	File_size
+master-bin.000001	0
+master-bin.000002	276
 start slave;
 show binary logs;
-Log_name
-slave-bin.000001
-slave-bin.000002
+Log_name	File_size
+slave-bin.000001	0
+slave-bin.000002	170
 show binlog events in 'slave-bin.000001' from 4;
 Log_name	Pos	Event_type	Server_id	Orig_log_pos	Info
 slave-bin.000001	4	Start	2	4	Server ver: VERSION, Binlog ver: 3

mysql-test/r/rpl_rotate_logs.result

@@ -26,10 +26,10 @@ create table t2(m int not null auto_increment primary key);
 insert into t2 values (34),(67),(123);
 flush logs;
 show binary logs;
-Log_name
-master-bin.000001
-master-bin.000002
-master-bin.000003
+Log_name	File_size
+master-bin.000001	0
+master-bin.000002	0
+master-bin.000003	4
 create table t3 select * from temp_table;
 select * from t3;
 a
@@ -42,18 +42,18 @@ set global sql_slave_skip_counter=1;
 start slave;
 purge master logs to 'master-bin.000002';
 show master logs;
-Log_name
-master-bin.000002
-master-bin.000003
+Log_name	File_size
+master-bin.000002	0
+master-bin.000003	229
 purge binary logs to 'master-bin.000002';
 show binary logs;
-Log_name
-master-bin.000002
-master-bin.000003
+Log_name	File_size
+master-bin.000002	0
+master-bin.000003	229
 purge master logs before now();
 show binary logs;
-Log_name
-master-bin.000003
+Log_name	File_size
+master-bin.000003	229
 insert into t2 values (65);
 show slave status;
 Slave_IO_State	Master_Host	Master_User	Master_Port	Connect_Retry	Master_Log_File	Read_Master_Log_Pos	Relay_Log_File	Relay_Log_Pos	Relay_Master_Log_File	Slave_IO_Running	Slave_SQL_Running	Replicate_Do_DB	Replicate_Ignore_DB	Replicate_Do_Table	Replicate_Ignore_Table	Replicate_Wild_Do_Table	Replicate_Wild_Ignore_Table	Last_Errno	Last_Error	Skip_Counter	Exec_Master_Log_Pos	Relay_Log_Space	Until_Condition	Until_Log_File	Until_Log_Pos	Master_SSL_Allowed	Master_SSL_CA_File	Master_SSL_CA_Path	Master_SSL_Cert	Master_SSL_Cipher	Master_SSL_Key	Seconds_Behind_Master
@@ -73,9 +73,9 @@ count(*)
 100
 create table t4 select * from temp_table;
 show binary logs;
-Log_name
-master-bin.000003
-master-bin.000004
+Log_name	File_size
+master-bin.000003	0
+master-bin.000004	2886
 show master status;
 File	Position	Binlog_Do_DB	Binlog_Ignore_DB
 master-bin.000004	2886		

sql/sql_repl.cc

@@ -1337,6 +1337,11 @@ int show_binlog_info(THD* thd)
 int show_binlogs(THD* thd)
 {
   IO_CACHE *index_file;
+  LOG_INFO cur;
+  IO_CACHE log;
+  File file;
+  const char *errmsg= 0;
+  MY_STAT stat_area;
   char fname[FN_REFLEN];
   List<Item> field_list;
   uint length;
@@ -1351,20 +1356,42 @@ int show_binlogs(THD* thd)
   }
 
   field_list.push_back(new Item_empty_string("Log_name", 255));
+  field_list.push_back(new Item_return_int("File_size", 20, 
+                                           MYSQL_TYPE_LONGLONG));
   if (protocol->send_fields(&field_list, 1))
     DBUG_RETURN(1);
   mysql_bin_log.lock_index();
   index_file=mysql_bin_log.get_index_file();
-  
+
+  mysql_bin_log.get_current_log(&cur);
+  int cur_dir_len = dirname_length(cur.log_file_name);
+
   reinit_io_cache(index_file, READ_CACHE, (my_off_t) 0, 0, 0);
 
   /* The file ends with EOF or empty line */
   while ((length=my_b_gets(index_file, fname, sizeof(fname))) > 1)
   {
+    fname[--length] = '\0';  /* remove the newline */
+
     protocol->prepare_for_resend();
     int dir_len = dirname_length(fname);
-    /* The -1 is for removing newline from fname */
-    protocol->store(fname + dir_len, length-1-dir_len, &my_charset_bin);
+    protocol->store(fname + dir_len, length-dir_len, &my_charset_bin);
+    if(!(strncmp(fname+dir_len, cur.log_file_name+cur_dir_len, length-dir_len)))
+    {
+      /* this is the active log, use the active position */
+      protocol->store((ulonglong) cur.pos);
+    } else {
+      /* this is an old log, open it and find the size */
+      if ((file=open_binlog(&log, fname+dir_len, &errmsg)) >= 0)
+      {
+        protocol->store((ulonglong) my_b_filelength(&log));
+        end_io_cache(&log);
+        my_close(file, MYF(0));
+      } else {
+        /* the file wasn't openable, but 0 is an invalid value anyway */
+        protocol->store((ulonglong) 0);
+      }
+    }
     if (protocol->write())
       goto err;
   }