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
|
/*
* Copyright (C) 1997-2004, Michael Jennings
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to
* deal in the Software without restriction, including without limitation the
* rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
* sell copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies of the Software, its documentation and marketing & publicity
* materials, and acknowledgment shall be given in the documentation, materials
* and software packages that this Software was used.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
/**
* @file file.c
* File manipulation routines.
*
* This file contains file-related functions.
*
* @author Michael Jennings <mej@eterm.org>
* $Revision$
* $Date$
*/
static const char __attribute__((unused)) cvs_ident[] = "$Id$";
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <libast_internal.h>
/**
* Create and open a temporary file.
*
* This function creates a temporary file and returns a standard UNIX
* file descriptor for the new file. The file is created in $TMPDIR,
* or $TMP, or /tmp if all else fails. The libc function @c mkstemp()
* does the actual file creation/opening. The umask is set to 0077
* just before the call, and the permissions are forceably changed to
* 0600 immediately after. If the @a len parameter is non-zero, up to
* @a len characters of the path and filename of the newly-created
* file are copied into the buffer pointed to by @a ftemplate. The
* file descriptor is then returned to the caller.
*
* @param ftemplate The initial portion of the filename. If you want
* the path info returned, make sure this buffer is
* sufficiently large.
* @param len The maximum number of bytes @a ftemplate can
* hold.
* @return The file descriptor for the new temp file.
*/
int
spiftool_temp_file(spif_charptr_t ftemplate, size_t len)
{
spif_char_t buff[256];
int fd;
mode_t m;
ASSERT_RVAL(!SPIF_PTR_ISNULL(ftemplate), SPIF_CAST_C(int) -1);
ASSERT_RVAL(len > 0, SPIF_CAST_C(int) -1);
if (getenv("TMPDIR")) {
snprintf(SPIF_CAST_C(char *) buff, sizeof(buff),
"%s/%sXXXXXX", getenv("TMPDIR"), ftemplate);
} else if (getenv("TMP")) {
snprintf(SPIF_CAST_C(char *) buff, sizeof(buff),
"%s/%sXXXXXX", getenv("TMP"), ftemplate);
} else {
snprintf(SPIF_CAST_C(char *) buff, sizeof(buff),
"/tmp/%sXXXXXX", ftemplate);
}
m = umask(0077);
fd = mkstemp(SPIF_CAST_C(char *) buff);
umask(m);
if ((fd < 0) || fchmod(fd, (S_IRUSR | S_IWUSR))) {
return (-1);
}
if (len) {
spiftool_safe_strncpy(ftemplate, buff, len);
}
return (fd);
}
|
