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/* drizzle/plugin/logging_query/logging_query.cc */
/* need to define DRIZZLE_SERVER to get inside the THD */
#define DRIZZLE_SERVER 1
#include <drizzled/server_includes.h>
#include <drizzled/plugin_logging.h>
#define MAX_MSG_LEN (32*1024)
static char* logging_query_filename= NULL;
static int fd= -1;
// copied from drizzled/sql_parse.cc
const LEX_STRING command_name[]={
{ C_STRING_WITH_LEN("Sleep") },
{ C_STRING_WITH_LEN("Quit") },
{ C_STRING_WITH_LEN("InitDB") },
{ C_STRING_WITH_LEN("Query") },
{ C_STRING_WITH_LEN("FieldList") },
{ C_STRING_WITH_LEN("CreateDB") },
{ C_STRING_WITH_LEN("DropDB") },
{ C_STRING_WITH_LEN("Refresh") },
{ C_STRING_WITH_LEN("Shutdown") },
{ C_STRING_WITH_LEN("Processlist") },
{ C_STRING_WITH_LEN("Connect") },
{ C_STRING_WITH_LEN("Kill") },
{ C_STRING_WITH_LEN("Ping") },
{ C_STRING_WITH_LEN("Time") },
{ C_STRING_WITH_LEN("ChangeUser") },
{ C_STRING_WITH_LEN("BinlogDump") },
{ C_STRING_WITH_LEN("ConnectOut") },
{ C_STRING_WITH_LEN("RegisterSlave") },
{ C_STRING_WITH_LEN("SetOption") },
{ C_STRING_WITH_LEN("Daemon") },
{ C_STRING_WITH_LEN("Error") }
};
bool logging_query_func_pre (THD *thd)
{
char msgbuf[MAX_MSG_LEN];
int msgbuf_len= 0;
int wrv;
if (fd < 0)
return false;
assert(thd != NULL);
msgbuf_len=
snprintf(msgbuf, MAX_MSG_LEN,
"log bgn thread_id=%ld query_id=%ld command=%.*s"
" db=\"%.*s\" query=\"%.*s\"\n",
(unsigned long) thd->thread_id,
(unsigned long) thd->query_id,
(uint32_t)command_name[thd->command].length, command_name[thd->command].str,
thd->db_length, thd->db,
thd->query_length, thd->query);
/* a single write has a OS level thread lock
so there is no need to have mutexes guarding this write,
*/
wrv= write(fd, msgbuf, msgbuf_len);
assert(wrv == msgbuf_len);
return false;
}
bool logging_query_func_post (THD *thd)
{
char msgbuf[MAX_MSG_LEN];
int msgbuf_len= 0;
int wrv;
if (fd < 0) return false;
assert(thd != NULL);
msgbuf_len=
snprintf(msgbuf, MAX_MSG_LEN,
"log end thread_id=%ld query_id=%ld command=%.*s"
" rows.sent=%ld rows.exam=%u\n",
(unsigned long) thd->thread_id,
(unsigned long) thd->query_id,
(uint32_t)command_name[thd->command].length, command_name[thd->command].str,
(unsigned long) thd->sent_row_count,
(uint32_t) thd->examined_row_count);
/* a single write has a OS level thread lock
so there is no need to have mutexes guarding this write,
*/
wrv= write(fd, msgbuf, msgbuf_len);
assert(wrv == msgbuf_len);
return false;
}
static int logging_query_plugin_init(void *p)
{
logging_t *l= (logging_t *) p;
if (logging_query_filename == NULL)
{
/* no destination filename was specified via system variables
return now, dont set the callback pointers
*/
return 0;
}
fd= open(logging_query_filename, O_WRONLY | O_APPEND | O_CREAT,
S_IRUSR|S_IWUSR);
if (fd < 0)
{
fprintf(stderr, "fail open fn=%s er=%s\n",
logging_query_filename,
strerror(errno));
/* we should return an error here, so the plugin doesnt load
but this causes Drizzle to crash
so until that is fixed,
just return a success,
but leave the function pointers as NULL and the fd as -1
*/
return 0;
}
l->logging_pre= logging_query_func_pre;
l->logging_post= logging_query_func_post;
return 0;
}
static int logging_query_plugin_deinit(void *p)
{
logging_st *l= (logging_st *) p;
if (fd >= 0)
{
close(fd);
fd= -1;
}
l->logging_pre= NULL;
l->logging_post= NULL;
return 0;
}
static DRIZZLE_SYSVAR_STR(filename, logging_query_filename,
PLUGIN_VAR_READONLY,
"File to log queries to.",
NULL, NULL, NULL);
static struct st_mysql_sys_var* logging_query_system_variables[]= {
DRIZZLE_SYSVAR(filename),
NULL
};
mysql_declare_plugin(logging_query)
{
DRIZZLE_LOGGER_PLUGIN,
"logging_query",
"0.1",
"Mark Atwood <mark@fallenpegasus.com>",
"Log queries",
PLUGIN_LICENSE_GPL,
logging_query_plugin_init,
logging_query_plugin_deinit,
NULL, /* status variables */
logging_query_system_variables,
NULL
}
mysql_declare_plugin_end;
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