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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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; either version 2 of the License, or
(at your option) any later version.
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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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"
#if defined(MSDOS) || defined(__WIN__)
#include <fcntl.h>
#ifndef __WIN__
#include <process.h>
#endif
#endif
#ifdef VMS
#include <processes.h>
#endif
#undef GETPID /* For HPUX */
#ifdef THREAD
#define GETPID() (log_type == 1 ? (long) myisam_pid : (long) my_thread_id());
#else
#define GETPID() myisam_pid
#endif
/* 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 = my_create(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=my_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 byte *buffert, uint length)
{
char 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);
pthread_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
VOID(my_write(myisam_log_file,buff,sizeof(buff),MYF(0)));
VOID(my_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));
pthread_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
void _myisam_log_command(enum myisam_log_commands command, MI_INFO *info,
const byte *buffert, uint length, int result)
{
char 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);
pthread_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
VOID(my_write(myisam_log_file,buff,sizeof(buff),MYF(0)));
if (buffert)
VOID(my_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));
pthread_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
void _myisam_log_record(enum myisam_log_commands command, MI_INFO *info,
const byte *record, my_off_t filepos, int result)
{
char 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]=(char) 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);
pthread_mutex_lock(&THR_LOCK_myisam);
error=my_lock(myisam_log_file,F_WRLCK,0L,F_TO_EOF,MYF(MY_SEEK_NOT_DONE));
VOID(my_write(myisam_log_file,buff,sizeof(buff),MYF(0)));
VOID(my_write(myisam_log_file,(byte*) 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_fixed(&pos,record+blob->offset+blob->pack_length,sizeof(char*));
VOID(my_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));
pthread_mutex_unlock(&THR_LOCK_myisam);
my_errno=old_errno;
}
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