1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
|
/* 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 */
/* open a MERGE-database */
#include "mrgdef.h"
#include <stddef.h>
#include <errno.h>
#ifdef VMS
#include "static.c"
#endif
/* open a MERGE-database.
if handle_locking is 0 then exit with error if some database is locked
if handle_locking is 1 then wait if database is locked
*/
MRG_INFO *mrg_open(name,mode,handle_locking)
const char *name;
int mode;
int handle_locking;
{
int save_errno,i,errpos;
uint files,dir_length;
ulonglong file_offset;
char name_buff[FN_REFLEN*2],buff[FN_REFLEN],*end;
MRG_INFO info,*m_info;
FILE *file;
N_INFO *isam,*last_isam;
DBUG_ENTER("mrg_open");
LINT_INIT(last_isam);
isam=0;
errpos=files=0;
bzero((gptr) &info,sizeof(info));
if (!(file=my_fopen(fn_format(name_buff,name,"",MRG_NAME_EXT,4),
O_RDONLY | O_SHARE,MYF(0))))
goto err;
errpos=1;
dir_length=dirname_part(name_buff,name);
info.reclength=0;
while (fgets(buff,FN_REFLEN-1,file))
{
if ((end=strend(buff))[-1] == '\n')
end[-1]='\0';
if (buff[0]) /* Skipp empty lines */
{
last_isam=isam;
if (!test_if_hard_path(buff))
{
VOID(strmake(name_buff+dir_length,buff,
sizeof(name_buff)-1-dir_length));
VOID(cleanup_dirname(buff,name_buff));
}
if (!(isam=nisam_open(buff,mode,test(handle_locking))))
goto err;
files++;
}
last_isam=isam;
if (info.reclength && info.reclength != isam->s->base.reclength)
{
my_errno=HA_ERR_WRONG_IN_RECORD;
goto err;
}
info.reclength=isam->s->base.reclength;
}
if (!(m_info= (MRG_INFO*) my_malloc(sizeof(MRG_INFO)+files*sizeof(MRG_TABLE),
MYF(MY_WME))))
goto err;
*m_info=info;
m_info->open_tables=(MRG_TABLE *) (m_info+1);
m_info->tables=files;
for (i=files ; i-- > 0 ; )
{
m_info->open_tables[i].table=isam;
m_info->options|=isam->s->base.options;
m_info->records+=isam->s->state.records;
m_info->del+=isam->s->state.del;
m_info->data_file_length=isam->s->state.data_file_length;
if (i)
isam=(N_INFO*) (isam->open_list.next->data);
}
/* Fix fileinfo for easyer debugging (actually set by rrnd) */
file_offset=0;
for (i=0 ; (uint) i < files ; i++)
{
m_info->open_tables[i].file_offset=(my_off_t) file_offset;
file_offset+=m_info->open_tables[i].table->s->state.data_file_length;
}
if (sizeof(my_off_t) == 4 && file_offset > (ulonglong) (ulong) ~0L)
{
my_errno=HA_ERR_RECORD_FILE_FULL;
my_free((char*) m_info,MYF(0));
goto err;
}
m_info->end_table=m_info->open_tables+files;
m_info->last_used_table=m_info->open_tables;
VOID(my_fclose(file,MYF(0)));
m_info->open_list.data=(void*) m_info;
pthread_mutex_lock(&THR_LOCK_open);
mrg_open_list=list_add(mrg_open_list,&m_info->open_list);
pthread_mutex_unlock(&THR_LOCK_open);
DBUG_RETURN(m_info);
err:
save_errno=my_errno;
switch (errpos) {
case 1:
VOID(my_fclose(file,MYF(0)));
for (i=files ; i-- > 0 ; )
{
isam=last_isam;
if (i)
last_isam=(N_INFO*) (isam->open_list.next->data);
nisam_close(isam);
}
}
my_errno=save_errno;
DBUG_RETURN (NULL);
}
|
