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
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
|
/* Utility to pick a temporary filename prefix.
Copyright (C) 1996, 1997, 1998, 2001, 2009 Free Software Foundation, Inc.
This file is part of the libiberty library.
Libiberty 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.
Libiberty 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 libiberty; see the file COPYING.LIB. If not,
write to the Free Software Foundation, Inc., 51 Franklin Street - Fifth Floor,
Boston, MA 02110-1301, USA. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h> /* May get P_tmpdir. */
#include <sys/types.h>
#include <errno.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#ifdef HAVE_SYS_FILE_H
#include <sys/file.h> /* May get R_OK, etc. on some systems. */
#endif
#if defined(_WIN32) && !defined(__CYGWIN__)
#include <windows.h>
#endif
#ifndef R_OK
#define R_OK 4
#define W_OK 2
#define X_OK 1
#endif
#include "libiberty.h"
extern int mkstemps (char *, int);
/* '/' works just fine on MS-DOS based systems. */
#ifndef DIR_SEPARATOR
#define DIR_SEPARATOR '/'
#endif
/* Name of temporary file.
mktemp requires 6 trailing X's. */
#define TEMP_FILE "ccXXXXXX"
#define TEMP_FILE_LEN (sizeof(TEMP_FILE) - 1)
#if !defined(_WIN32) || defined(__CYGWIN__)
/* Subroutine of choose_tmpdir.
If BASE is non-NULL, return it.
Otherwise it checks if DIR is a usable directory.
If success, DIR is returned.
Otherwise NULL is returned. */
static inline const char *try_dir (const char *, const char *);
static inline const char *
try_dir (const char *dir, const char *base)
{
if (base != 0)
return base;
if (dir != 0
&& access (dir, R_OK | W_OK | X_OK) == 0)
return dir;
return 0;
}
static const char tmp[] = { DIR_SEPARATOR, 't', 'm', 'p', 0 };
static const char usrtmp[] =
{ DIR_SEPARATOR, 'u', 's', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
static const char vartmp[] =
{ DIR_SEPARATOR, 'v', 'a', 'r', DIR_SEPARATOR, 't', 'm', 'p', 0 };
#endif
static char *memoized_tmpdir;
/*
@deftypefn Replacement char* choose_tmpdir ()
Returns a pointer to a directory path suitable for creating temporary
files in.
@end deftypefn
*/
char *
choose_tmpdir (void)
{
if (!memoized_tmpdir)
{
#if !defined(_WIN32) || defined(__CYGWIN__)
const char *base = 0;
char *tmpdir;
unsigned int len;
#ifdef VMS
/* Try VMS standard temp logical. */
base = try_dir ("/sys$scratch", base);
#else
base = try_dir (getenv ("TMPDIR"), base);
base = try_dir (getenv ("TMP"), base);
base = try_dir (getenv ("TEMP"), base);
#endif
#ifdef P_tmpdir
/* We really want a directory name here as if concatenated with say \dir
we do not end up with a double \\ which defines an UNC path. */
if (strcmp (P_tmpdir, "\\") == 0)
base = try_dir ("\\.", base);
else
base = try_dir (P_tmpdir, base);
#endif
/* Try /var/tmp, /usr/tmp, then /tmp. */
base = try_dir (vartmp, base);
base = try_dir (usrtmp, base);
base = try_dir (tmp, base);
/* If all else fails, use the current directory! */
if (base == 0)
base = ".";
/* Append DIR_SEPARATOR to the directory we've chosen
and return it. */
len = strlen (base);
tmpdir = XNEWVEC (char, len + 2);
strcpy (tmpdir, base);
tmpdir[len] = DIR_SEPARATOR;
tmpdir[len+1] = '\0';
memoized_tmpdir = tmpdir;
#else /* defined(_WIN32) && !defined(__CYGWIN__) */
DWORD len;
/* Figure out how much space we need. */
len = GetTempPath(0, NULL);
if (len)
{
memoized_tmpdir = XNEWVEC (char, len);
if (!GetTempPath(len, memoized_tmpdir))
{
XDELETEVEC (memoized_tmpdir);
memoized_tmpdir = NULL;
}
}
if (!memoized_tmpdir)
/* If all else fails, use the current directory. */
memoized_tmpdir = xstrdup (".\\");
#endif /* defined(_WIN32) && !defined(__CYGWIN__) */
}
return memoized_tmpdir;
}
/*
@deftypefn Replacement char* make_temp_file (const char *@var{suffix})
Return a temporary file name (as a string) or @code{NULL} if unable to
create one. @var{suffix} is a suffix to append to the file name. The
string is @code{malloc}ed, and the temporary file has been created.
@end deftypefn
*/
char *
make_temp_file (const char *suffix)
{
const char *base = choose_tmpdir ();
char *temp_filename;
int base_len, suffix_len;
int fd;
if (suffix == 0)
suffix = "";
base_len = strlen (base);
suffix_len = strlen (suffix);
temp_filename = XNEWVEC (char, base_len
+ TEMP_FILE_LEN
+ suffix_len + 1);
strcpy (temp_filename, base);
strcpy (temp_filename + base_len, TEMP_FILE);
strcpy (temp_filename + base_len + TEMP_FILE_LEN, suffix);
fd = mkstemps (temp_filename, suffix_len);
/* Mkstemps failed. It may be EPERM, ENOSPC etc. */
if (fd == -1)
{
fprintf (stderr, "Cannot create temporary file in %s: %s\n",
base, strerror (errno));
abort ();
}
/* We abort on failed close out of sheer paranoia. */
if (close (fd))
abort ();
return temp_filename;
}
|
