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/* Copyright (C) 2012 Monty Program Ab.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA */
#include <mysql/plugin_audit.h>
#include <stdio.h>
#include <time.h>
#include <mysql/service_logger.h>
/*
Disable __attribute__() on non-gcc compilers.
*/
#if !defined(__attribute__) && !defined(__GNUC__)
#define __attribute__(A)
#endif
#ifdef _WIN32
#define localtime_r(a, b) localtime_s(b, a)
#endif /*WIN32*/
/*
rate 0 means the logging was disabled.
*/
static char *filename;
static unsigned int rate;
static unsigned long long size_limit;
static unsigned int rotations;
static char rotate;
static unsigned int count;
LOGGER_HANDLE *logfile;
static void rotate_log(MYSQL_THD thd, struct st_mysql_sys_var *var,
void *var_ptr, const void *save);
static MYSQL_SYSVAR_UINT(rate, rate, PLUGIN_VAR_RQCMDARG,
"Sampling rate. If set to 0(zero), the logging is disabled.", NULL, NULL,
1, 0, 1000000, 1);
static MYSQL_SYSVAR_ULONGLONG(size_limit, size_limit,
PLUGIN_VAR_READONLY, "Log file size limit", NULL, NULL,
1000000, 100, ((long long) 0x7FFFFFFFFFFFFFFFLL), 1);
static MYSQL_SYSVAR_UINT(rotations, rotations,
PLUGIN_VAR_READONLY, "Number of rotations before log is removed.",
NULL, NULL, 9, 1, 999, 1);
static MYSQL_SYSVAR_BOOL(rotate, rotate,
PLUGIN_VAR_OPCMDARG, "Force log rotation", NULL, rotate_log,
0);
static MYSQL_SYSVAR_STR(filename, filename,
PLUGIN_VAR_READONLY | PLUGIN_VAR_RQCMDARG,
"The file to log sql errors to", NULL, NULL,
"sql_errors.log");
static struct st_mysql_sys_var* vars[] = {
MYSQL_SYSVAR(rate),
MYSQL_SYSVAR(size_limit),
MYSQL_SYSVAR(rotations),
MYSQL_SYSVAR(rotate),
MYSQL_SYSVAR(filename),
NULL
};
static void log_sql_errors(MYSQL_THD thd __attribute__((unused)),
unsigned int event_class __attribute__((unused)),
const void *ev)
{
const struct mysql_event_general *event =
(const struct mysql_event_general*)ev;
if (rate &&
event->event_subclass == MYSQL_AUDIT_GENERAL_ERROR)
{
if (++count >= rate)
{
struct tm t;
time_t event_time = event->general_time;
count = 0;
(void) localtime_r(&event_time, &t);
logger_printf(logfile, "%04d-%02d-%02d %2d:%02d:%02d "
"%s ERROR %d: %s : %s\n",
t.tm_year + 1900, t.tm_mon + 1,
t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec,
event->general_user, event->general_error_code,
event->general_command, event->general_query);
}
}
}
static int sql_error_log_init(void *p __attribute__((unused)))
{
logger_init_mutexes();
logfile= logger_open(filename, size_limit, rotations);
if (logfile == NULL) {
fprintf(stderr, "Could not create file '%s'\n",
filename);
return 1;
}
count = 0;
return 0;
}
static int sql_error_log_deinit(void *p __attribute__((unused)))
{
if (logfile)
logger_close(logfile);
return 0;
}
static void rotate_log(MYSQL_THD thd __attribute__((unused)),
struct st_mysql_sys_var *var __attribute__((unused)),
void *var_ptr __attribute__((unused)),
const void *save __attribute__((unused)))
{
(void) logger_rotate(logfile);
}
static struct st_mysql_audit descriptor =
{
MYSQL_AUDIT_INTERFACE_VERSION,
NULL,
log_sql_errors,
{ MYSQL_AUDIT_GENERAL_CLASSMASK }
};
maria_declare_plugin(sql_errlog)
{
MYSQL_AUDIT_PLUGIN,
&descriptor,
"SQL_ERROR_LOG",
"Alexey Botchkov",
"Log SQL level errors to a file with rotation",
PLUGIN_LICENSE_GPL,
sql_error_log_init,
sql_error_log_deinit,
0x0100,
NULL,
vars,
"1.0",
MariaDB_PLUGIN_MATURITY_STABLE
}
maria_declare_plugin_end;
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