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
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
|
/* 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 02110-1335 USA */
#include "mysys_priv.h"
#include "mysys_err.h"
#include <m_string.h>
#include <errno.h>
CREATE_NOSYMLINK_FUNCTION(
open_nosymlinks(const char *pathname, int flags, int mode),
openat(dfd, filename, O_NOFOLLOW | flags, mode),
open(pathname, O_NOFOLLOW | flags, mode)
);
/*
Open a file
SYNOPSIS
my_open()
FileName Fully qualified file name
Flags Read | write
MyFlags Special flags
RETURN VALUE
File descriptor
*/
File my_open(const char *FileName, int Flags, myf MyFlags)
/* Path-name of file */
/* Read | write .. */
/* Special flags */
{
File fd;
DBUG_ENTER("my_open");
DBUG_PRINT("my",("Name: '%s' Flags: %d MyFlags: %lu",
FileName, Flags, MyFlags));
if (!(MyFlags & (MY_WME | MY_FAE | MY_FFNF)))
MyFlags|= my_global_flags;
#if defined(_WIN32)
fd= my_win_open(FileName, Flags);
#else
if (MyFlags & MY_NOSYMLINKS)
fd = open_nosymlinks(FileName, Flags | O_CLOEXEC, my_umask);
else
fd = open(FileName, Flags | O_CLOEXEC, my_umask);
#endif
fd= my_register_filename(fd, FileName, FILE_BY_OPEN,
EE_FILENOTFOUND, MyFlags);
DBUG_RETURN(fd);
} /* my_open */
/*
Close a file
SYNOPSIS
my_close()
fd File sescriptor
myf Special Flags
*/
int my_close(File fd, myf MyFlags)
{
int err;
char *name= NULL;
DBUG_ENTER("my_close");
DBUG_PRINT("my",("fd: %d MyFlags: %lu",fd, MyFlags));
if (!(MyFlags & (MY_WME | MY_FAE)))
MyFlags|= my_global_flags;
if ((uint) fd < my_file_limit && my_file_info[fd].type != UNOPEN)
{
name= my_file_info[fd].name;
my_file_info[fd].name= NULL;
my_file_info[fd].type= UNOPEN;
}
#ifndef _WIN32
err= close(fd);
#else
err= my_win_close(fd);
#endif
if (err)
{
DBUG_PRINT("error",("Got error %d on close",err));
my_errno=errno;
if (MyFlags & (MY_FAE | MY_WME))
my_error(EE_BADCLOSE, MYF(ME_BELL | (MyFlags & (ME_NOTE | ME_ERROR_LOG))),
name,errno);
}
if (name)
{
my_free(name);
}
thread_safe_decrement32(&my_file_opened);
DBUG_RETURN(err);
} /* my_close */
/*
Register file in my_file_info[]
SYNOPSIS
my_register_filename()
fd File number opened, -1 if error on open
FileName File name
type_file_type How file was created
error_message_number Error message number if caller got error (fd == -1)
MyFlags Flags for my_close()
RETURN
-1 error
# Filenumber
*/
File my_register_filename(File fd, const char *FileName, enum file_type
type_of_file, uint error_message_number, myf MyFlags)
{
DBUG_ENTER("my_register_filename");
if ((int) fd >= MY_FILE_MIN)
{
thread_safe_increment32(&my_file_opened);
if ((uint) fd >= my_file_limit)
DBUG_RETURN(fd);
my_file_info[fd].name = (char*) my_strdup(FileName, MyFlags);
statistic_increment(my_file_total_opened,&THR_LOCK_open);
my_file_info[fd].type = type_of_file;
DBUG_PRINT("exit",("fd: %d",fd));
DBUG_RETURN(fd);
}
my_errno= errno;
DBUG_PRINT("error",("Got error %d on open", my_errno));
if (MyFlags & (MY_FFNF | MY_FAE | MY_WME))
{
if (my_errno == EMFILE)
error_message_number= EE_OUT_OF_FILERESOURCES;
my_error(error_message_number,
MYF(ME_BELL | (MyFlags & (ME_NOTE | ME_ERROR_LOG))),
FileName, my_errno);
}
DBUG_RETURN(-1);
}
|
