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Code Activity

sql/log.cc

Browse Source 
Added magic number to binlog
sql/log_event.cc
    distinquish bogus data from truncated logs
sql/log_event.h
    added magic number
    added LOG_READ_TRUNC error
sql/mysqlbinlog.cc
    fixed to handle magic number
    added O_BINARY to my_fopen
sql/mysqld.cc
    added code for replicate-rewrite-db
sql/slave.cc
    replicate-rewrite-db
    O_BINARY
    handle magic
sql/sql_class.h
    added i_string_pair class
sql/sql_repl.cc
    added magic
    better error messages
support-files/magic
    added magic for binlog

Added test case for replication of queries with error
This commit is contained in:
sasha@mysql.sashanet.com
2000-10-05 17:58:16 -06:00
parent a434c8d244
commit f452ab6f90
11 changed files with 175 additions and 15 deletions
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59
sql/sql_repl.cc
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@ -98,6 +98,7 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
LOG_INFO linfo;
char *log_file_name = linfo.log_file_name;
char search_file_name[FN_REFLEN];
char magic[4];
FILE* log = NULL;
String* packet = &thd->packet;
int error;
@ -129,7 +130,25 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
errmsg = "Could not open log file";
goto err;
}
if(my_fread(log, magic, sizeof(magic), MYF(MY_NABP|MY_WME)))
{
errmsg = "I/O error reading binlog magic number";
goto err;
}
if(memcmp(magic, BINLOG_MAGIC, 4))
{
errmsg = "Binlog has bad magic number, fire your magician";
goto err;
}
if(pos < 4)
{
errmsg = "Contratulations! You have hit the magic number and can win \
sweepstakes if you report the bug";
goto err;
}
if(my_fseek(log, pos, MY_SEEK_SET, MYF(MY_WME)) == MY_FILEPOS_ERROR )
{
errmsg = "Error on fseek()";
@ -168,7 +187,21 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
}
if(error != LOG_READ_EOF)
{
errmsg = "error reading log event";
switch(error)
{
case LOG_READ_BOGUS:
errmsg = "bogus data in log event";
break;
case LOG_READ_IO:
errmsg = "I/O error reading log event";
break;
case LOG_READ_MEM:
errmsg = "memory allocation failed reading log event";
break;
case LOG_READ_TRUNC:
errmsg = "binlog truncated in the middle of event";
break;
}
goto err;
}
@ -261,7 +294,8 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
}
else
{
bool loop_breaker = 0; // need this to break out of the for loop from switch
bool loop_breaker = 0;
// need this to break out of the for loop from switch
thd->proc_info = "switching to next log";
switch(mysql_bin_log.find_next_log(&linfo))
{
@ -281,14 +315,31 @@ void mysql_binlog_send(THD* thd, char* log_ident, ulong pos, ushort flags)
(void) my_fclose(log, MYF(MY_WME));
log = my_fopen(log_file_name, O_RDONLY|O_BINARY, MYF(MY_WME));
if(!log)
goto err;
{
errmsg = "Could not open next log";
goto err;
}
//check the magic
if(my_fread(log, magic, sizeof(magic), MYF(MY_NABP|MY_WME)))
{
errmsg = "I/O error reading binlog magic number";
goto err;
}
if(memcmp(magic, BINLOG_MAGIC, 4))
{
errmsg = "Binlog has bad magic number, fire your magician";
goto err;
}
// fake Rotate_log event just in case it did not make it to the log
// otherwise the slave make get confused about the offset
{
char header[LOG_EVENT_HEADER_LEN];
memset(header, 0, 4); // when does not matter
header[EVENT_TYPE_OFFSET] = ROTATE_EVENT;
char* p = strrchr(log_file_name, FN_LIBCHAR); // find the last slash
char* p = strrchr(log_file_name, FN_LIBCHAR);
// find the last slash
if(p)
p++;
else