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2d11135a AL |
1 | // -*- mode: cpp; mode: fold -*- |
2 | // Description /*{{{*/ | |
0077d829 | 3 | // $Id: cachefile.cc,v 1.8 2002/04/27 04:28:04 jgg Exp $ |
2d11135a AL |
4 | /* ###################################################################### |
5 | ||
6 | CacheFile - Simple wrapper class for opening, generating and whatnot | |
7 | ||
8 | This class implements a simple 2 line mechanism to open various sorts | |
9 | of caches. It can operate as root, as not root, show progress and so on, | |
10 | it transparently handles everything necessary. | |
11 | ||
12 | ##################################################################### */ | |
13 | /*}}}*/ | |
14 | // Include Files /*{{{*/ | |
ea542140 DK |
15 | #include <config.h> |
16 | ||
2d11135a AL |
17 | #include <apt-pkg/cachefile.h> |
18 | #include <apt-pkg/error.h> | |
19 | #include <apt-pkg/sourcelist.h> | |
20 | #include <apt-pkg/pkgcachegen.h> | |
21 | #include <apt-pkg/configuration.h> | |
b2e465d6 AL |
22 | #include <apt-pkg/policy.h> |
23 | #include <apt-pkg/pkgsystem.h> | |
614adaa0 | 24 | #include <apt-pkg/fileutl.h> |
472ff00e | 25 | #include <apt-pkg/progress.h> |
453b82a3 DK |
26 | #include <apt-pkg/depcache.h> |
27 | #include <apt-pkg/mmap.h> | |
28 | #include <apt-pkg/pkgcache.h> | |
a249b3e6 | 29 | #include <apt-pkg/indexfile.h> |
453b82a3 DK |
30 | |
31 | #include <string.h> | |
32 | #include <unistd.h> | |
33 | #include <string> | |
34 | #include <vector> | |
f40fdaa4 | 35 | #include <memory> |
ea542140 | 36 | |
b2e465d6 | 37 | #include <apti18n.h> |
2d11135a | 38 | /*}}}*/ |
2d11135a | 39 | // CacheFile::CacheFile - Constructor /*{{{*/ |
9112f777 DK |
40 | pkgCacheFile::pkgCacheFile() : d(NULL), ExternOwner(false), Map(NULL), Cache(NULL), |
41 | DCache(NULL), SrcList(NULL), Policy(NULL) | |
42 | { | |
43 | } | |
44 | pkgCacheFile::pkgCacheFile(pkgDepCache * const Owner) : d(NULL), ExternOwner(true), | |
45 | Map(&Owner->GetCache().GetMap()), Cache(&Owner->GetCache()), | |
46 | DCache(Owner), SrcList(NULL), Policy(NULL) | |
2d11135a AL |
47 | { |
48 | } | |
49 | /*}}}*/ | |
b2e465d6 | 50 | // CacheFile::~CacheFile - Destructor /*{{{*/ |
2d11135a AL |
51 | // --------------------------------------------------------------------- |
52 | /* */ | |
53 | pkgCacheFile::~pkgCacheFile() | |
54 | { | |
9112f777 DK |
55 | if (ExternOwner == false) |
56 | { | |
57 | delete DCache; | |
58 | delete Cache; | |
59 | delete Map; | |
60 | } | |
b2e465d6 | 61 | delete Policy; |
3f8621c5 | 62 | delete SrcList; |
9112f777 DK |
63 | if (ExternOwner == false) |
64 | _system->UnLock(true); | |
3f8621c5 | 65 | } |
2d11135a | 66 | /*}}}*/ |
0077d829 | 67 | // CacheFile::BuildCaches - Open and build the cache files /*{{{*/ |
95278287 DK |
68 | class APT_HIDDEN ScopedErrorMerge { |
69 | public: | |
70 | ScopedErrorMerge() { _error->PushToStack(); } | |
71 | ~ScopedErrorMerge() { _error->MergeWithStack(); } | |
72 | }; | |
f40fdaa4 | 73 | |
2e5f4e45 | 74 | bool pkgCacheFile::BuildCaches(OpProgress *Progress, bool WithLock) |
2d11135a | 75 | { |
f40fdaa4 JAK |
76 | std::unique_ptr<pkgCache> Cache; |
77 | std::unique_ptr<MMap> Map; | |
78 | ||
79 | if (this->Cache != NULL) | |
3f8621c5 DK |
80 | return true; |
81 | ||
95278287 | 82 | ScopedErrorMerge sem; |
3f8621c5 DK |
83 | if (_config->FindB("pkgCacheFile::Generate", true) == false) |
84 | { | |
3d8232bf | 85 | FileFd file(_config->FindFile("Dir::Cache::pkgcache"), FileFd::ReadOnly); |
95278287 DK |
86 | if (file.IsOpen() == false || file.Failed()) |
87 | return false; | |
f40fdaa4 | 88 | Map.reset(new MMap(file, MMap::Public|MMap::ReadOnly)); |
6789e01e DK |
89 | if (unlikely(Map->validData() == false)) |
90 | return false; | |
f40fdaa4 JAK |
91 | Cache.reset(new pkgCache(Map.get())); |
92 | if (_error->PendingError() == true) | |
93 | return false; | |
94 | ||
95 | this->Cache = Cache.release(); | |
96 | this->Map = Map.release(); | |
97 | return true; | |
3f8621c5 DK |
98 | } |
99 | ||
2d11135a | 100 | if (WithLock == true) |
b2e465d6 AL |
101 | if (_system->Lock() == false) |
102 | return false; | |
c4171975 | 103 | |
2d11135a AL |
104 | if (_error->PendingError() == true) |
105 | return false; | |
3f8621c5 | 106 | |
f40fdaa4 JAK |
107 | if (BuildSourceList(Progress) == false) |
108 | return false; | |
b2e465d6 AL |
109 | |
110 | // Read the caches | |
f40fdaa4 JAK |
111 | MMap *TmpMap = nullptr; |
112 | pkgCache *TmpCache = nullptr; | |
113 | bool Res = pkgCacheGenerator::MakeStatusCache(*SrcList,Progress,&TmpMap, &TmpCache, true); | |
114 | Map.reset(TmpMap); | |
115 | Cache.reset(TmpCache); | |
2e5f4e45 DK |
116 | if (Progress != NULL) |
117 | Progress->Done(); | |
b2e465d6 AL |
118 | if (Res == false) |
119 | return _error->Error(_("The package lists or status file could not be parsed or opened.")); | |
120 | ||
121 | /* This sux, remove it someday */ | |
95278287 | 122 | if (_error->PendingError() == true) |
a7c835af | 123 | _error->Warning(_("You may want to run apt-get update to correct these problems")); |
b2e465d6 | 124 | |
f1616039 | 125 | if (Cache == nullptr) |
f40fdaa4 | 126 | Cache.reset(new pkgCache(Map.get())); |
b2e465d6 AL |
127 | if (_error->PendingError() == true) |
128 | return false; | |
f40fdaa4 JAK |
129 | this->Map = Map.release(); |
130 | this->Cache = Cache.release(); | |
131 | ||
0077d829 AL |
132 | return true; |
133 | } | |
134 | /*}}}*/ | |
3f8621c5 DK |
135 | // CacheFile::BuildSourceList - Open and build all relevant sources.list/*{{{*/ |
136 | // --------------------------------------------------------------------- | |
137 | /* */ | |
65512241 | 138 | bool pkgCacheFile::BuildSourceList(OpProgress * /*Progress*/) |
3f8621c5 | 139 | { |
f40fdaa4 JAK |
140 | std::unique_ptr<pkgSourceList> SrcList; |
141 | if (this->SrcList != NULL) | |
3f8621c5 DK |
142 | return true; |
143 | ||
f40fdaa4 | 144 | SrcList.reset(new pkgSourceList()); |
3f8621c5 DK |
145 | if (SrcList->ReadMainList() == false) |
146 | return _error->Error(_("The list of sources could not be read.")); | |
f40fdaa4 | 147 | this->SrcList = SrcList.release(); |
3f8621c5 DK |
148 | return true; |
149 | } | |
150 | /*}}}*/ | |
2e5f4e45 | 151 | // CacheFile::BuildPolicy - Open and build all relevant preferences /*{{{*/ |
0077d829 AL |
152 | // --------------------------------------------------------------------- |
153 | /* */ | |
65512241 | 154 | bool pkgCacheFile::BuildPolicy(OpProgress * /*Progress*/) |
0077d829 | 155 | { |
f40fdaa4 JAK |
156 | std::unique_ptr<pkgPolicy> Policy; |
157 | if (this->Policy != NULL) | |
3f8621c5 DK |
158 | return true; |
159 | ||
f40fdaa4 | 160 | Policy.reset(new pkgPolicy(Cache)); |
b2e465d6 AL |
161 | if (_error->PendingError() == true) |
162 | return false; | |
6009e60d | 163 | |
e68ca100 | 164 | if (ReadPinFile(*Policy) == false || ReadPinDir(*Policy) == false) |
b2e465d6 | 165 | return false; |
2e5f4e45 | 166 | |
f40fdaa4 | 167 | this->Policy = Policy.release(); |
2e5f4e45 DK |
168 | return true; |
169 | } | |
170 | /*}}}*/ | |
171 | // CacheFile::BuildDepCache - Open and build the dependency cache /*{{{*/ | |
172 | // --------------------------------------------------------------------- | |
173 | /* */ | |
174 | bool pkgCacheFile::BuildDepCache(OpProgress *Progress) | |
175 | { | |
f40fdaa4 JAK |
176 | std::unique_ptr<pkgDepCache> DCache; |
177 | if (this->DCache != NULL) | |
3f8621c5 DK |
178 | return true; |
179 | ||
592d06b6 MV |
180 | if (BuildPolicy(Progress) == false) |
181 | return false; | |
182 | ||
f40fdaa4 | 183 | DCache.reset(new pkgDepCache(Cache,Policy)); |
b2e465d6 AL |
184 | if (_error->PendingError() == true) |
185 | return false; | |
f40fdaa4 JAK |
186 | if (DCache->Init(Progress) == false) |
187 | return false; | |
2e5f4e45 | 188 | |
f40fdaa4 JAK |
189 | this->DCache = DCache.release(); |
190 | return true; | |
2e5f4e45 DK |
191 | } |
192 | /*}}}*/ | |
193 | // CacheFile::Open - Open the cache files, creating if necessary /*{{{*/ | |
194 | // --------------------------------------------------------------------- | |
195 | /* */ | |
196 | bool pkgCacheFile::Open(OpProgress *Progress, bool WithLock) | |
197 | { | |
198 | if (BuildCaches(Progress,WithLock) == false) | |
199 | return false; | |
200 | ||
201 | if (BuildPolicy(Progress) == false) | |
202 | return false; | |
203 | ||
204 | if (BuildDepCache(Progress) == false) | |
205 | return false; | |
206 | ||
207 | if (Progress != NULL) | |
208 | Progress->Done(); | |
2d11135a AL |
209 | if (_error->PendingError() == true) |
210 | return false; | |
2d11135a AL |
211 | |
212 | return true; | |
213 | } | |
214 | /*}}}*/ | |
a249b3e6 DK |
215 | bool pkgCacheFile::AddIndexFile(pkgIndexFile * const File) /*{{{*/ |
216 | { | |
217 | if (SrcList == NULL) | |
218 | if (BuildSourceList() == false) | |
219 | return false; | |
220 | SrcList->AddVolatileFile(File); | |
221 | ||
222 | if (Cache == nullptr || File->HasPackages() == false || File->Exists() == false) | |
223 | return true; | |
224 | ||
225 | if (File->FindInCache(*Cache).end() == false) | |
226 | return _error->Warning("Duplicate sources.list entry %s", | |
227 | File->Describe().c_str()); | |
228 | ||
229 | if (ExternOwner == false) | |
230 | { | |
231 | delete DCache; | |
232 | delete Cache; | |
233 | } | |
234 | delete Policy; | |
235 | DCache = NULL; | |
236 | Policy = NULL; | |
237 | Cache = NULL; | |
238 | ||
239 | if (ExternOwner == false) | |
240 | { | |
241 | // a dynamic mmap means that we have build at least parts of the cache | |
242 | // in memory – which we might or might not have written to disk. | |
243 | // Throwing away would therefore be a very costly operation we want to avoid | |
244 | DynamicMMap * dynmmap = dynamic_cast<DynamicMMap*>(Map); | |
245 | if (dynmmap != nullptr) | |
246 | { | |
247 | { | |
248 | pkgCacheGenerator Gen(dynmmap, nullptr); | |
a133f79c | 249 | if (Gen.Start() == false || File->Merge(Gen, nullptr) == false) |
a249b3e6 DK |
250 | return false; |
251 | } | |
252 | Cache = new pkgCache(Map); | |
f40fdaa4 JAK |
253 | if (_error->PendingError() == true) { |
254 | delete Cache; | |
255 | Cache = nullptr; | |
256 | return false; | |
257 | } | |
258 | return true; | |
a249b3e6 DK |
259 | } |
260 | else | |
261 | { | |
262 | delete Map; | |
263 | Map = NULL; | |
264 | } | |
265 | } | |
266 | else | |
267 | { | |
268 | ExternOwner = false; | |
269 | Map = NULL; | |
270 | } | |
b6f1b480 | 271 | _system->UnLock(true); |
a249b3e6 DK |
272 | return true; |
273 | } | |
274 | /*}}}*/ | |
8de79b68 DK |
275 | // CacheFile::RemoveCaches - remove all cache files from disk /*{{{*/ |
276 | // --------------------------------------------------------------------- | |
277 | /* */ | |
278 | void pkgCacheFile::RemoveCaches() | |
279 | { | |
280 | std::string const pkgcache = _config->FindFile("Dir::cache::pkgcache"); | |
281 | std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache"); | |
282 | ||
283 | if (pkgcache.empty() == false && RealFileExists(pkgcache) == true) | |
ce1f3a2c | 284 | RemoveFile("RemoveCaches", pkgcache); |
8de79b68 | 285 | if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true) |
ce1f3a2c | 286 | RemoveFile("RemoveCaches", srcpkgcache); |
fbb2c7e0 DK |
287 | if (pkgcache.empty() == false) |
288 | { | |
289 | std::string cachedir = flNotFile(pkgcache); | |
290 | std::string cachefile = flNotDir(pkgcache); | |
c0d58f42 | 291 | if (cachedir.empty() != true && cachefile.empty() != true && DirectoryExists(cachedir) == true) |
fbb2c7e0 DK |
292 | { |
293 | cachefile.append("."); | |
294 | std::vector<std::string> caches = GetListOfFilesInDir(cachedir, false); | |
295 | for (std::vector<std::string>::const_iterator file = caches.begin(); file != caches.end(); ++file) | |
296 | { | |
297 | std::string nuke = flNotDir(*file); | |
298 | if (strncmp(cachefile.c_str(), nuke.c_str(), cachefile.length()) != 0) | |
299 | continue; | |
ce1f3a2c | 300 | RemoveFile("RemoveCaches", *file); |
fbb2c7e0 DK |
301 | } |
302 | } | |
303 | } | |
304 | ||
305 | if (srcpkgcache.empty() == true) | |
306 | return; | |
307 | ||
308 | std::string cachedir = flNotFile(srcpkgcache); | |
309 | std::string cachefile = flNotDir(srcpkgcache); | |
c0d58f42 | 310 | if (cachedir.empty() == true || cachefile.empty() == true || DirectoryExists(cachedir) == false) |
fbb2c7e0 DK |
311 | return; |
312 | cachefile.append("."); | |
313 | std::vector<std::string> caches = GetListOfFilesInDir(cachedir, false); | |
314 | for (std::vector<std::string>::const_iterator file = caches.begin(); file != caches.end(); ++file) | |
315 | { | |
316 | std::string nuke = flNotDir(*file); | |
317 | if (strncmp(cachefile.c_str(), nuke.c_str(), cachefile.length()) != 0) | |
318 | continue; | |
ce1f3a2c | 319 | RemoveFile("RemoveCaches", *file); |
fbb2c7e0 | 320 | } |
8de79b68 DK |
321 | } |
322 | /*}}}*/ | |
b2e465d6 AL |
323 | // CacheFile::Close - close the cache files /*{{{*/ |
324 | // --------------------------------------------------------------------- | |
325 | /* */ | |
326 | void pkgCacheFile::Close() | |
327 | { | |
9112f777 DK |
328 | if (ExternOwner == false) |
329 | { | |
330 | delete DCache; | |
331 | delete Cache; | |
332 | delete Map; | |
333 | } | |
334 | else | |
335 | ExternOwner = false; | |
b2e465d6 | 336 | delete Policy; |
3f8621c5 | 337 | delete SrcList; |
b2e465d6 AL |
338 | _system->UnLock(true); |
339 | ||
3f8621c5 DK |
340 | Map = NULL; |
341 | DCache = NULL; | |
342 | Policy = NULL; | |
343 | Cache = NULL; | |
344 | SrcList = NULL; | |
b2e465d6 AL |
345 | } |
346 | /*}}}*/ |