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
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
|
// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: cachefile.cc,v 1.8 2002/04/27 04:28:04 jgg Exp $
/* ######################################################################
CacheFile - Simple wrapper class for opening, generating and whatnot
This class implements a simple 2 line mechanism to open various sorts
of caches. It can operate as root, as not root, show progress and so on,
it transparently handles everything necessary.
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <config.h>
#include <apt-pkg/cachefile.h>
#include <apt-pkg/error.h>
#include <apt-pkg/sourcelist.h>
#include <apt-pkg/pkgcachegen.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/policy.h>
#include <apt-pkg/pkgsystem.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/progress.h>
#include <apt-pkg/depcache.h>
#include <apt-pkg/mmap.h>
#include <apt-pkg/pkgcache.h>
#include <apt-pkg/indexfile.h>
#include <string.h>
#include <unistd.h>
#include <string>
#include <vector>
#include <apti18n.h>
/*}}}*/
// CacheFile::CacheFile - Constructor /*{{{*/
pkgCacheFile::pkgCacheFile() : d(NULL), ExternOwner(false), Map(NULL), Cache(NULL),
DCache(NULL), SrcList(NULL), Policy(NULL)
{
}
pkgCacheFile::pkgCacheFile(pkgDepCache * const Owner) : d(NULL), ExternOwner(true),
Map(&Owner->GetCache().GetMap()), Cache(&Owner->GetCache()),
DCache(Owner), SrcList(NULL), Policy(NULL)
{
}
/*}}}*/
// CacheFile::~CacheFile - Destructor /*{{{*/
// ---------------------------------------------------------------------
/* */
pkgCacheFile::~pkgCacheFile()
{
if (ExternOwner == false)
{
delete DCache;
delete Cache;
delete Map;
}
delete Policy;
delete SrcList;
if (ExternOwner == false)
_system->UnLock(true);
}
/*}}}*/
// CacheFile::BuildCaches - Open and build the cache files /*{{{*/
class APT_HIDDEN ScopedErrorMerge {
public:
ScopedErrorMerge() { _error->PushToStack(); }
~ScopedErrorMerge() { _error->MergeWithStack(); }
};
bool pkgCacheFile::BuildCaches(OpProgress *Progress, bool WithLock)
{
if (Cache != NULL)
return true;
ScopedErrorMerge sem;
if (_config->FindB("pkgCacheFile::Generate", true) == false)
{
FileFd file(_config->FindFile("Dir::Cache::pkgcache"), FileFd::ReadOnly);
if (file.IsOpen() == false || file.Failed())
return false;
Map = new MMap(file, MMap::Public|MMap::ReadOnly);
if (unlikely(Map->validData() == false))
return false;
Cache = new pkgCache(Map);
return _error->PendingError() == false;
}
if (WithLock == true)
if (_system->Lock() == false)
return false;
if (_error->PendingError() == true)
return false;
BuildSourceList(Progress);
// Read the caches
Cache = nullptr;
bool Res = pkgCacheGenerator::MakeStatusCache(*SrcList,Progress,&Map, &Cache, true);
if (Progress != NULL)
Progress->Done();
if (Res == false)
return _error->Error(_("The package lists or status file could not be parsed or opened."));
/* This sux, remove it someday */
if (_error->PendingError() == true)
_error->Warning(_("You may want to run apt-get update to correct these problems"));
if (Cache == nullptr)
Cache = new pkgCache(Map);
if (_error->PendingError() == true)
return false;
return true;
}
/*}}}*/
// CacheFile::BuildSourceList - Open and build all relevant sources.list/*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::BuildSourceList(OpProgress * /*Progress*/)
{
if (SrcList != NULL)
return true;
SrcList = new pkgSourceList();
if (SrcList->ReadMainList() == false)
return _error->Error(_("The list of sources could not be read."));
return true;
}
/*}}}*/
// CacheFile::BuildPolicy - Open and build all relevant preferences /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::BuildPolicy(OpProgress * /*Progress*/)
{
if (Policy != NULL)
return true;
Policy = new pkgPolicy(Cache);
if (_error->PendingError() == true)
return false;
if (ReadPinFile(*Policy) == false || ReadPinDir(*Policy) == false)
return false;
return true;
}
/*}}}*/
// CacheFile::BuildDepCache - Open and build the dependency cache /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::BuildDepCache(OpProgress *Progress)
{
if (DCache != NULL)
return true;
if (BuildPolicy(Progress) == false)
return false;
DCache = new pkgDepCache(Cache,Policy);
if (_error->PendingError() == true)
return false;
return DCache->Init(Progress);
}
/*}}}*/
// CacheFile::Open - Open the cache files, creating if necessary /*{{{*/
// ---------------------------------------------------------------------
/* */
bool pkgCacheFile::Open(OpProgress *Progress, bool WithLock)
{
if (BuildCaches(Progress,WithLock) == false)
return false;
if (BuildPolicy(Progress) == false)
return false;
if (BuildDepCache(Progress) == false)
return false;
if (Progress != NULL)
Progress->Done();
if (_error->PendingError() == true)
return false;
return true;
}
/*}}}*/
bool pkgCacheFile::AddIndexFile(pkgIndexFile * const File) /*{{{*/
{
if (SrcList == NULL)
if (BuildSourceList() == false)
return false;
SrcList->AddVolatileFile(File);
if (Cache == nullptr || File->HasPackages() == false || File->Exists() == false)
return true;
if (File->FindInCache(*Cache).end() == false)
return _error->Warning("Duplicate sources.list entry %s",
File->Describe().c_str());
if (ExternOwner == false)
{
delete DCache;
delete Cache;
}
delete Policy;
DCache = NULL;
Policy = NULL;
Cache = NULL;
if (ExternOwner == false)
{
// a dynamic mmap means that we have build at least parts of the cache
// in memory – which we might or might not have written to disk.
// Throwing away would therefore be a very costly operation we want to avoid
DynamicMMap * dynmmap = dynamic_cast<DynamicMMap*>(Map);
if (dynmmap != nullptr)
{
{
pkgCacheGenerator Gen(dynmmap, nullptr);
if (File->Merge(Gen, nullptr) == false)
return false;
}
Cache = new pkgCache(Map);
return _error->PendingError() == false;
}
else
{
delete Map;
Map = NULL;
}
}
else
{
ExternOwner = false;
Map = NULL;
}
return true;
}
/*}}}*/
// CacheFile::RemoveCaches - remove all cache files from disk /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgCacheFile::RemoveCaches()
{
std::string const pkgcache = _config->FindFile("Dir::cache::pkgcache");
std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache");
if (pkgcache.empty() == false && RealFileExists(pkgcache) == true)
RemoveFile("RemoveCaches", pkgcache);
if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true)
RemoveFile("RemoveCaches", srcpkgcache);
if (pkgcache.empty() == false)
{
std::string cachedir = flNotFile(pkgcache);
std::string cachefile = flNotDir(pkgcache);
if (cachedir.empty() != true && cachefile.empty() != true && DirectoryExists(cachedir) == true)
{
cachefile.append(".");
std::vector<std::string> caches = GetListOfFilesInDir(cachedir, false);
for (std::vector<std::string>::const_iterator file = caches.begin(); file != caches.end(); ++file)
{
std::string nuke = flNotDir(*file);
if (strncmp(cachefile.c_str(), nuke.c_str(), cachefile.length()) != 0)
continue;
RemoveFile("RemoveCaches", *file);
}
}
}
if (srcpkgcache.empty() == true)
return;
std::string cachedir = flNotFile(srcpkgcache);
std::string cachefile = flNotDir(srcpkgcache);
if (cachedir.empty() == true || cachefile.empty() == true || DirectoryExists(cachedir) == false)
return;
cachefile.append(".");
std::vector<std::string> caches = GetListOfFilesInDir(cachedir, false);
for (std::vector<std::string>::const_iterator file = caches.begin(); file != caches.end(); ++file)
{
std::string nuke = flNotDir(*file);
if (strncmp(cachefile.c_str(), nuke.c_str(), cachefile.length()) != 0)
continue;
RemoveFile("RemoveCaches", *file);
}
}
/*}}}*/
// CacheFile::Close - close the cache files /*{{{*/
// ---------------------------------------------------------------------
/* */
void pkgCacheFile::Close()
{
if (ExternOwner == false)
{
delete DCache;
delete Cache;
delete Map;
}
else
ExternOwner = false;
delete Policy;
delete SrcList;
_system->UnLock(true);
Map = NULL;
DCache = NULL;
Policy = NULL;
Cache = NULL;
SrcList = NULL;
}
/*}}}*/
|
