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/* Copyright (c) 2000, 2011, Oracle and/or its affiliates. All rights reserved.
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 St, Fifth Floor, Boston, MA 02110-1301 USA */
/*
Logging of MyISAM commands and records on logfile for debugging
The log can be examined with help of the myisamlog command.
*/
#include "myisamdef.h"
#ifdef __WIN__
#include <fcntl.h>
#endif
#undef GETPID /* For HPUX */
#define GETPID() (log_type == 1 ? (long) myisam_pid : (long) my_thread_dbug_id())
/* Activate logging if flag is 1 and reset logging if flag is 0 */
static int log_type=0;
ulong myisam_pid=0;
int mi_log(int activate_log)
{
int error=0;
char buff[FN_REFLEN];
DBUG_ENTER("mi_log");
log_type=activate_log;
if (activate_log)
{
if (!myisam_pid)
myisam_pid=(ulong) getpid();
if (myisam_log_file < 0)
{
if ((myisam_log_file= mysql_file_create(mi_key_file_log,
fn_format(buff,
myisam_log_filename,
"", ".log", 4),
0,
(O_RDWR | O_BINARY | O_APPEND),
MYF(0))) < 0)
DBUG_RETURN(my_errno);
}
}
else if (myisam_log_file >= 0)
{
error= mysql_file_close(myisam_log_file, MYF(0)) ? my_errno : 0 ;
myisam_log_file= -1;
}
DBUG_RETURN(error);
}
/* Logging of records and commands on logfile */
/* All logs starts with command(1) dfile(2) process(4) result(2) */
void _myisam_log(enum myisam_log_commands command, MI_INFO *info,
const uchar *buffert, uint length)
{
uchar buff[11];
int error,old_errno;
ulong pid=(ulong) GETPID();
old_errno=my_errno;
bzero(buff,sizeof(buff));
buff[0]=(char) command;
mi_int2store(buff+1,info->dfile);
mi_int4store(buff+3,pid);
mi_int2store(buff+9,length);
mysql_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
(void) mysql_file_write(myisam_log_file, buff, sizeof(buff), MYF(0));
(void) mysql_file_write(myisam_log_file, buffert, length, MYF(0));
if (!error)
error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
mysql_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
void _myisam_log_command(enum myisam_log_commands command, MI_INFO *info,
const uchar *buffert, uint length, int result)
{
uchar buff[9];
int error,old_errno;
ulong pid=(ulong) GETPID();
old_errno=my_errno;
buff[0]=(char) command;
mi_int2store(buff+1,info->dfile);
mi_int4store(buff+3,pid);
mi_int2store(buff+7,result);
mysql_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
(void) mysql_file_write(myisam_log_file, buff, sizeof(buff), MYF(0));
if (buffert)
(void) mysql_file_write(myisam_log_file, buffert, length, MYF(0));
if (!error)
error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
mysql_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
void _myisam_log_record(enum myisam_log_commands command, MI_INFO *info,
const uchar *record, my_off_t filepos, int result)
{
uchar buff[21],*pos;
int error,old_errno;
uint length;
ulong pid=(ulong) GETPID();
old_errno=my_errno;
if (!info->s->base.blobs)
length=info->s->base.reclength;
else
length=info->s->base.reclength+ _my_calc_total_blob_length(info,record);
buff[0]=(uchar) command;
mi_int2store(buff+1,info->dfile);
mi_int4store(buff+3,pid);
mi_int2store(buff+7,result);
mi_sizestore(buff+9,filepos);
mi_int4store(buff+17,length);
mysql_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
(void) mysql_file_write(myisam_log_file, buff, sizeof(buff), MYF(0));
(void) mysql_file_write(myisam_log_file, record, info->s->base.reclength, MYF(0));
if (info->s->base.blobs)
{
MI_BLOB *blob,*end;
for (end=info->blobs+info->s->base.blobs, blob= info->blobs;
blob != end ;
blob++)
{
memcpy(&pos, record+blob->offset+blob->pack_length,
sizeof(char*));
(void) mysql_file_write(myisam_log_file, pos, blob->length, MYF(0));
}
}
if (!error)
error=my_lock(myisam_log_file,F_UNLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
mysql_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
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