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
|
/*
* lib/krb5/ccache/stdio/scc_destry.c
*
* Copyright 1990 by the Massachusetts Institute of Technology.
* All Rights Reserved.
*
* Export of this software from the United States of America may
* require a specific license from the United States Government.
* It is the responsibility of any person or organization contemplating
* export to obtain such a license before exporting.
*
* WITHIN THAT CONSTRAINT, permission to use, copy, modify, and
* distribute this software and its documentation for any purpose and
* without fee is hereby granted, provided that the above copyright
* notice appear in all copies and that both that copyright notice and
* this permission notice appear in supporting documentation, and that
* the name of M.I.T. not be used in advertising or publicity pertaining
* to distribution of the software without specific, written prior
* permission. M.I.T. makes no representations about the suitability of
* this software for any purpose. It is provided "as is" without express
* or implied warranty.
*
*
* This file contains the source code for krb5_scc_destroy.
*/
#include "scc.h"
#ifndef SEEK_SET
#define SEEK_SET 0
#endif
/*
* Effects:
* Destroys the contents of id.
*
* Errors:
* system errors
*/
krb5_error_code krb5_scc_destroy(context, id)
krb5_context context;
krb5_ccache id;
{
#if 0
unsigned long size;
char zeros[BUFSIZ];
#endif
krb5_scc_data *data = (krb5_scc_data *) id->data;
register int ret;
if (!OPENCLOSE(id)) {
(void) fclose(data->file);
data->file = 0;
}
ret = remove (data->filename);
if (ret < 0) {
ret = krb5_scc_interpret(context, errno);
if (OPENCLOSE(id)) {
(void) fclose(data->file);
data->file = 0;
}
goto cleanup;
}
#if 0
/*
* Possible future extension: Read entire file to determine
* length, then write nulls all over it. This was the UNIX
* version...
*/
ret = fstat(fileno(data->file), &buf);
if (ret < 0) {
ret = krb5_scc_interpret(context, errno);
if (OPENCLOSE(id)) {
(void) fclose(data->file);
data->file = 0;
}
goto cleanup;
}
/* XXX This may not be legal XXX */
size = (unsigned long) buf.st_size;
memset (zeros, 0, BUFSIZ);
for (i=0; i < size / BUFSIZ; i++)
if (fwrite(data->file, zeros, BUFSIZ) < 0) {
ret = krb5_scc_interpret(context, errno);
if (OPENCLOSE(id)) {
(void) fclose(data->file);
data->file = 0;
}
goto cleanup;
}
if (fwrite(data->file, zeros, size % BUFSIZ) < 0) {
ret = krb5_scc_interpret(context, errno);
if (OPENCLOSE(id)) {
(void) fclose(data->file);
data->file = 0;
}
goto cleanup;
}
ret = fclose(data->file);
data->file = 0;
#endif
if (ret)
ret = krb5_scc_interpret(context, errno);
cleanup:
krb5_xfree(data->filename);
krb5_xfree(data);
krb5_xfree(id);
return ret;
}
|