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
|
/* This file is part of "reprepro"
* Copyright (C) 2012 Bernhard R. Link
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02111-1301 USA
*/
#include <config.h>
#include <errno.h>
#include <assert.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include "error.h"
#include "ignore.h"
#include "strlist.h"
#include "chunks.h"
#include "files.h"
#include "debfile.h"
#include "binaries.h"
#include "descriptions.h"
#include "md5.h"
/* get the description from a .(u)deb file */
static retvalue description_from_package(const char *control, char **description_p) {
struct strlist filekeys;
char *filename;
char *deb_control;
retvalue r;
r = binaries_getfilekeys(control, &filekeys);
if (r == RET_NOTHING)
r = RET_ERROR;
if (RET_WAS_ERROR(r))
return r;
if (filekeys.count != 1) {
fprintf(stderr, "Strange number of files for binary package: %d\n",
filekeys.count);
strlist_done(&filekeys);
return RET_ERROR;
}
filename = files_calcfullfilename(filekeys.values[0]);
strlist_done(&filekeys);
if (FAILEDTOALLOC(filename))
return RET_ERROR_OOM;
if (verbose > 7) {
fprintf(stderr, "Reading '%s' to extract description...\n",
filename);
}
r = extractcontrol(&deb_control, filename);
assert (r != RET_NOTHING);
if (RET_WAS_ERROR(r)) {
free(filename);
return r;
}
r = chunk_getwholedata(deb_control, "Description", description_p);
if (r == RET_NOTHING) {
fprintf(stderr, "Not found any Description within file '%s'!\n",
filename);
}
free(filename);
free(deb_control);
return r;
}
static const char tab[16] = {'0', '1', '2', '3', '4', '5', '6', '7',
'8', '9', 'a', 'b', 'c', 'd', 'e', 'f'};
/* This only matches the official one if the description is well-formed enough.
* If it has less or more leading spaces or anything else our reading has stripped,
* it will not match.... */
static void description_genmd5(const char *description, /*@out@*/ char *d, size_t len) {
struct MD5Context context;
unsigned char md5buffer[MD5_DIGEST_SIZE];
int i;
assert (len == 2*MD5_DIGEST_SIZE + 1);
MD5Init(&context);
MD5Update(&context, (const unsigned char*)description, strlen(description));
MD5Update(&context, (const unsigned char*)"\n", 1);
MD5Final(md5buffer, &context);
for (i=0 ; i < MD5_DIGEST_SIZE ; i++) {
*(d++) = tab[md5buffer[i] >> 4];
*(d++) = tab[md5buffer[i] & 0xF];
}
*d = '\0';
}
/* Currently only normalizing towards a full Description is supported,
* the cached description is not yet used, long descriptions are not stored elsewhere
* and thus also no reference counting is done. */
retvalue description_addpackage(struct target *target, const char *package, const char *control, char **control_p) {
char *description, *description_md5, *deb_description, *newcontrol;
struct fieldtoadd *todo;
size_t dlen;
retvalue r;
/* source packages have no descriptions */
if (target->packagetype == pt_dsc)
return RET_NOTHING;
r = chunk_getwholedata(control, "Description", &description);
if (RET_WAS_ERROR(r))
return r;
if (r == RET_NOTHING) {
fprintf(stderr,
"Strange control data for '%s': no Description at all\n",
package);
return RET_NOTHING;
}
if (strchr(description, '\n') != NULL) {
/* there already is a long description, nothing to do */
free(description);
return RET_NOTHING;
}
dlen = strlen(description);
r = chunk_getwholedata(control, "Description-md5", &description_md5);
if (RET_WAS_ERROR(r)) {
free(description);
return r;
}
if (r == RET_NOTHING) {
/* only short description and no -md5?
* unusual but can happen, especially with .udeb */
free(description);
return RET_NOTHING;
}
r = description_from_package(control, &deb_description);
assert (r != RET_NOTHING);
if (RET_WAS_ERROR(r)) {
fprintf(stderr, "Cannot retrieve long description for package '%s' out of package's files!\n",
package);
free(description);
free(description_md5);
/* not finding the .deb file is not fatal */
return RET_NOTHING;
}
/* check if the existing short description matches the found one */
if (strncmp(description, deb_description, dlen) != 0) {
fprintf(stderr,
"Short Description of package '%s' does not match\n"
"the start of the long descriptiongfound in the .deb\n",
package);
//if (!force) {
free(description);
free(description_md5);
free(deb_description);
/* not fatal, only not processed */
return RET_NOTHING;
//}
}
if (strlen(deb_description) == dlen) {
/* nothing new, only a short description in the .deb, too: */
free(description);
free(description_md5);
free(deb_description);
return RET_NOTHING;
}
free(description);
/* check if Description-md5 matches */
if (description_md5 != NULL) {
char found[2 * MD5_DIGEST_SIZE + 1];
description_genmd5(deb_description, found, sizeof(found));
if (strcmp(found, description_md5) != 0) {
fprintf(stderr,
"Description-md5 of package '%s' does not match\n"
"the md5 of the description found in the .deb\n"
"('%s' != '%s')!\n",
package, description_md5, found);
//if (!force) {
free(description_md5);
/* not fatal, only not processed */
free(deb_description);
return RET_NOTHING;
//}
}
free(description_md5);
}
todo = deletefield_new("Description-md5", NULL);
if (!FAILEDTOALLOC(todo))
todo = addfield_new("Description", deb_description, todo);
newcontrol = chunk_replacefields(control, todo, "Description", false);
addfield_free(todo);
free(deb_description);
if (FAILEDTOALLOC(newcontrol))
return RET_ERROR_OOM;
*control_p = newcontrol;
return RET_OK;
}
|
