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
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; if not, write to the Free
Software Foundation, Inc., 59 Temple Place - Suite 330, Boston,
MA 02111-1307, USA */
#include "mysys_priv.h"
#include <m_string.h>
#include "my_static.h"
#include "mysys_err.h"
#include <errno.h>
#ifdef HAVE_PATHS_H
#include <paths.h>
#endif
#ifdef HAVE_TEMPNAM
#ifndef MSDOS
extern char **environ;
#endif
#endif
/*
Create a temporary file in a given directory
This function should be used instead of my_tempnam() !
*/
File create_temp_file(char *to, const char *dir, const char *prefix,
int mode, myf MyFlags)
{
File file= -1;
DBUG_ENTER("open_temp_file");
#if defined(_MSC_VER)
{
char *end,*res,**old_env,*temp_env[1];
old_env=environ;
if (dir)
{
end=strend(dir)-1;
if (!dir[0])
{ /* Change empty string to current dir */
to[0]= FN_CURLIB;
to[1]= 0;
dir=to;
}
else if (*end == FN_DEVCHAR)
{ /* Get current dir for drive */
_fullpath(temp,dir,FN_REFLEN);
dir=to;
}
else if (*end == FN_LIBCHAR && dir < end && end[-1] != FN_DEVCHAR)
{
strmake(to,dir,(uint) (end-dir)); /* Copy and remove last '\' */
dir=to;
}
environ=temp_env; /* Force use of dir (dir not checked) */
temp_env[0]=0;
}
if ((res=tempnam((char*) dir,(char *) prefix)))
{
strnmov(to,res,FN_REFLEN);
(*free)(res);
file=my_create(to,0, mode, MyFlags);
}
environ=old_env;
}
#elif defined(_ZTC__)
if (!dir)
dir=getenv("TMPDIR");
if ((res=tempnam((char*) dir,(char *) prefix)))
{
strnmov(to,res,FN_REFLEN);
(*free)(res);
file=my_create(to, 0, mode, MyFlags);
}
#elif defined(HAVE_MKSTEMP)
{
char prefix[30];
uint pfx_len;
pfx_len=(strmov(strnmov(prefix,
prefix ? prefix : "tmp.",
sizeof(prefix)-7),"XXXXXX") - prefix);
if (!dir && ! (dir =getenv("TMPDIR")))
dir=P_tmpdir;
if (strlen(dir)+ pfx_len > FN_REFLEN-2)
{
errno=my_errno= ENAMETOOLONG;
return 1;
}
strmov(to,dir);
strmov(convert_dirname(to),prefix);
file=mkstemp(to);
}
#elif defined(HAVE_TEMPNAM)
{
char *res,**old_env,*temp_env[1];
if (dir && !dir[0])
{ /* Change empty string to current dir */
to[0]= FN_CURLIB;
to[1]= 0;
dir=to;
}
old_env=environ;
if (dir)
{ /* Don't use TMPDIR if dir is given */
environ=temp_env;
temp_env[0]=0;
}
if ((res=tempnam((char*) dir, (char*) prefix)))
{
strnmov(to,res,FN_REFLEN);
(*free)(res);
file=my_create(to,0,
(int) (O_RDWR | O_BINARY | O_TRUNC |
O_TEMPORARY | O_SHORT_LIVED),
MYF(MY_WME));
}
else
{
DBUG_PRINT("error",("Got error: %d from tempnam",errno));
}
environ=old_env;
}
#else
{
register long uniq;
register int length;
my_string pos,end_pos;
/* Make an unique number */
pthread_mutex_lock(&THR_LOCK_open);
uniq= ((long) getpid() << 20) + (long) _my_tempnam_used++ ;
pthread_mutex_unlock(&THR_LOCK_open);
if (!dir && !(dir=getenv("TMPDIR"))) /* Use this if possibly */
dir=P_tmpdir; /* Use system default */
length=strlen(dir)+strlen(pfx)+1;
DBUG_PRINT("test",("mallocing %d byte",length+8+sizeof(TMP_EXT)+1));
if (length+8+sizeof(TMP_EXT)+1 > FN_REFLENGTH)
errno=my_errno= ENAMETOOLONG;
else
{
end_pos=strmov(to,dir);
if (end_pos != to && end_pos[-1] != FN_LIBCHAR)
*end_pos++=FN_LIBCHAR;
end_pos=strmov(end_pos,pfx);
for (length=0 ; length < 8 && uniq ; length++)
{
*end_pos++= _dig_vec[(int) (uniq & 31)];
uniq >>= 5;
}
(void) strmov(end_pos,TMP_EXT);
file=my_create(to,0,
(int) (O_RDWR | O_BINARY | O_TRUNC |
O_TEMPORARY | O_SHORT_LIVED),
MYF(MY_WME));
}
}
#endif
DBUG_RETURN(file);
}
|
