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
|
/* Copyright (c) 2004, 2010, 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 */
/**
@file
@brief
Functions for discover of frm file from handler
*/
#include "sql_priv.h"
#include "unireg.h"
#include "discover.h"
#include <my_dir.h>
/**
Read the contents of a .frm file.
frmdata and len are set to 0 on error.
@param name path to table-file "db/name"
@param frmdata frm data
@param len length of the read frmdata
@retval
0 ok
@retval
1 Could not open file
@retval
2 Could not stat file
@retval
3 Could not allocate data for read. Could not read file
*/
int readfrm(const char *name, uchar **frmdata, size_t *len)
{
int error;
char index_file[FN_REFLEN];
File file;
size_t read_len;
uchar *read_data;
MY_STAT state;
DBUG_ENTER("readfrm");
DBUG_PRINT("enter",("name: '%s'",name));
*frmdata= NULL; // In case of errors
*len= 0;
error= 1;
if ((file= mysql_file_open(key_file_frm,
fn_format(index_file, name, "", reg_ext,
MY_UNPACK_FILENAME|MY_APPEND_EXT),
O_RDONLY | O_SHARE,
MYF(0))) < 0)
goto err_end;
// Get length of file
error= 2;
if (mysql_file_fstat(file, &state, MYF(0)))
goto err;
read_len= state.st_size;
// Read whole frm file
error= 3;
read_data= 0; // Nothing to free
if (read_string(file, &read_data, read_len))
goto err;
// Setup return data
*frmdata= (uchar*) read_data;
*len= read_len;
error= 0;
err:
if (file > 0)
(void) mysql_file_close(file, MYF(MY_WME));
err_end: /* Here when no file */
DBUG_RETURN (error);
} /* readfrm */
/*
Write the content of a frm data pointer
to a frm file.
@param name path to table-file "db/name"
@param frmdata frm data
@param len length of the frmdata
@retval
0 ok
@retval
2 Could not write file
*/
int writefrm(const char *name, const uchar *frmdata, size_t len)
{
File file;
char index_file[FN_REFLEN];
int error;
DBUG_ENTER("writefrm");
DBUG_PRINT("enter",("name: '%s' len: %lu ",name, (ulong) len));
error= 0;
if ((file= mysql_file_create(key_file_frm,
fn_format(index_file, name, "", reg_ext,
MY_UNPACK_FILENAME | MY_APPEND_EXT),
CREATE_MODE, O_RDWR | O_TRUNC,
MYF(MY_WME))) >= 0)
{
if (mysql_file_write(file, frmdata, len, MYF(MY_WME | MY_NABP)))
error= 2;
(void) mysql_file_close(file, MYF(0));
}
DBUG_RETURN(error);
} /* writefrm */
|
