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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
|
/* 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
#if !defined( MSDOS) && !defined(OS2)
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 __attribute__((unused)),
myf MyFlags __attribute__((unused)))
{
File file= -1;
DBUG_ENTER("create_temp_file");
#if defined(_MSC_VER)
{
char temp[FN_REFLEN],*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)))
{
strmake(to,res,FN_REFLEN-1);
(*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)))
{
strmake(to,res,FN_REFLEN-1);
(*free)(res);
file=my_create(to, 0, mode, MyFlags);
}
#elif defined(HAVE_MKSTEMP)
{
char prefix_buff[30];
uint pfx_len;
File org_file;
pfx_len= (uint) (strmov(strnmov(prefix_buff,
prefix ? prefix : "tmp.",
sizeof(prefix_buff)-7),"XXXXXX") -
prefix_buff);
if (!dir && ! (dir =getenv("TMPDIR")))
dir=P_tmpdir;
if (strlen(dir)+ pfx_len > FN_REFLEN-2)
{
errno=my_errno= ENAMETOOLONG;
return 1;
}
strmov(convert_dirname(to,dir,NullS),prefix_buff);
org_file=mkstemp(to);
file=my_register_filename(org_file, to, FILE_BY_MKSTEMP,
EE_CANTCREATEFILE, MyFlags);
/* If we didn't manage to register the name, remove the temp file */
if (org_file >= 0 && file < 0)
{
int tmp=my_errno;
(void) my_delete(to, MYF(MY_WME | ME_NOINPUT));
my_errno=tmp;
}
}
#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;
}
#ifdef OS2
// changing environ variable doesn't work with VACPP
char buffer[256];
sprintf( buffer, "TMP=%s", dir);
// remove ending backslash
if (buffer[strlen(buffer)-1] == '\\')
buffer[strlen(buffer)-1] = '\0';
putenv( buffer);
#else
old_env= (char**) environ;
if (dir)
{ /* Don't use TMPDIR if dir is given */
environ=(const char**) temp_env;
temp_env[0]=0;
}
#endif
if ((res=tempnam((char*) dir, (char*) prefix)))
{
strmake(to,res,FN_REFLEN-1);
(*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));
}
#ifndef OS2
environ=(const char**) old_env;
#endif
}
#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
if (file >= 0)
thread_safe_increment(my_tmp_file_created,&THR_LOCK_open);
DBUG_RETURN(file);
}
|
