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94098b22c0
WL#3771
"Audit Plugin Interface"
Implement new plug-in type - AUDIT
New plug-in: audit_null
simply increments counter for how many times it was called.
130 lines
3.4 KiB
C
130 lines
3.4 KiB
C
/* Copyright (C) 2006-2007 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#include <stdio.h>
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#include <mysql/plugin.h>
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#include <mysql/plugin_audit.h>
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#if !defined(__attribute__) && (defined(__cplusplus) || !defined(__GNUC__) || __GNUC__ == 2 && __GNUC_MINOR__ < 8)
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#define __attribute__(A)
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#endif
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static volatile int number_of_calls; /* for SHOW STATUS, see below */
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/*
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Initialize the plugin at server start or plugin installation.
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SYNOPSIS
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audit_null_plugin_init()
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DESCRIPTION
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Does nothing.
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RETURN VALUE
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0 success
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1 failure (cannot happen)
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*/
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static int audit_null_plugin_init(void *arg __attribute__((unused)))
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{
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number_of_calls= 0;
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return(0);
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}
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/*
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Terminate the plugin at server shutdown or plugin deinstallation.
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SYNOPSIS
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audit_null_plugin_deinit()
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Does nothing.
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RETURN VALUE
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0 success
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1 failure (cannot happen)
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*/
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static int audit_null_plugin_deinit(void *arg __attribute__((unused)))
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{
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printf("audit_null was invoked %u times\n", number_of_calls);
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return(0);
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}
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/*
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Foo
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SYNOPSIS
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audit_null_notify()
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thd connection context
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DESCRIPTION
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*/
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static void audit_null_notify(MYSQL_THD thd __attribute__((unused)),
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const struct mysql_event *event
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__attribute__((unused)))
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{
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/* prone to races, oh well */
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number_of_calls++;
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}
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/*
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Plugin type-specific descriptor
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*/
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static struct st_mysql_audit audit_null_descriptor=
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{
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MYSQL_AUDIT_INTERFACE_VERSION, /* interface version */
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NULL, /* release_thd function */
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audit_null_notify, /* notify function */
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{ (unsigned long) -1 } /* class mask */
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};
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/*
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Plugin status variables for SHOW STATUS
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*/
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static struct st_mysql_show_var simple_status[]=
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{
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{"audit_null_called", (char *)&number_of_calls, SHOW_INT},
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{0,0,0}
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};
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/*
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Plugin library descriptor
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*/
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mysql_declare_plugin(audit_null)
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{
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MYSQL_AUDIT_PLUGIN, /* type */
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&audit_null_descriptor, /* descriptor */
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"NULL_AUDIT", /* name */
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"MySQL AB", /* author */
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"Simple NULL Audit", /* description */
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PLUGIN_LICENSE_GPL,
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audit_null_plugin_init, /* init function (when loaded) */
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audit_null_plugin_deinit, /* deinit function (when unloaded) */
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0x0001, /* version */
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simple_status, /* status variables */
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NULL, /* system variables */
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NULL
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}
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mysql_declare_plugin_end;
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