-// DisplayRecord - Displays the complete record for the package /*{{{*/
-// ---------------------------------------------------------------------
-/* This displays the package record from the proper package index file.
- It is not used by DumpAvail for performance reasons. */
-
-static APT_PURE unsigned char const* skipDescriptionFields(unsigned char const * DescP)
-{
- char const * const TagName = "\nDescription";
- size_t const TagLen = strlen(TagName);
- while ((DescP = (unsigned char*)strchr((char*)DescP, '\n')) != NULL)
- {
- if (DescP[1] == ' ')
- DescP += 2;
- else if (strncmp((char*)DescP, TagName, TagLen) == 0)
- DescP += TagLen;
- else
- break;
- }
- if (DescP != NULL)
- ++DescP;
- return DescP;
-}
-static bool DisplayRecord(pkgCacheFile &CacheFile, pkgCache::VerIterator V)
-{
- pkgCache *Cache = CacheFile.GetPkgCache();
- if (unlikely(Cache == NULL))
- return false;
-
- // Find an appropriate file
- pkgCache::VerFileIterator Vf = V.FileList();
- for (; Vf.end() == false; ++Vf)
- if ((Vf.File()->Flags & pkgCache::Flag::NotSource) == 0)
- break;
- if (Vf.end() == true)
- Vf = V.FileList();
-
- // Check and load the package list file
- pkgCache::PkgFileIterator I = Vf.File();
- if (I.IsOk() == false)
- return _error->Error(_("Package file %s is out of sync."),I.FileName());
-
- FileFd PkgF;
- if (PkgF.Open(I.FileName(), FileFd::ReadOnly, FileFd::Extension) == false)
- return false;
-
- // Read the record (and ensure that it ends with a newline and NUL)
- unsigned char *Buffer = new unsigned char[Cache->HeaderP->MaxVerFileSize+2];
- Buffer[Vf->Size] = '\n';
- Buffer[Vf->Size+1] = '\0';
- if (PkgF.Seek(Vf->Offset) == false ||
- PkgF.Read(Buffer,Vf->Size) == false)
- {
- delete [] Buffer;
- return false;
- }
-
- // Get a pointer to start of Description field
- const unsigned char *DescP = (unsigned char*)strstr((char*)Buffer, "\nDescription");
- if (DescP != NULL)
- ++DescP;
- else
- DescP = Buffer + Vf->Size;
-
- // Write all but Description
- size_t const length = DescP - Buffer;
- if (length != 0 && FileFd::Write(STDOUT_FILENO, Buffer, length) == false)
- {
- delete [] Buffer;
- return false;
- }
-
- // Show the right description
- pkgRecords Recs(*Cache);
- pkgCache::DescIterator Desc = V.TranslatedDescription();
- if (Desc.end() == false)
- {
- pkgRecords::Parser &P = Recs.Lookup(Desc.FileList());
- cout << "Description" << ( (strcmp(Desc.LanguageCode(),"") != 0) ? "-" : "" ) << Desc.LanguageCode() << ": " << P.LongDesc();
- cout << std::endl << "Description-md5: " << Desc.md5() << std::endl;
-
- // Find the first field after the description (if there is any)
- DescP = skipDescriptionFields(DescP);
- }
- // else we have no translation, so we found a lonely Description-md5 -> don't skip it
-
- // write the rest of the buffer, but skip mixed in Descriptions* fields
- while (DescP != NULL)
- {
- const unsigned char * const Start = DescP;
- const unsigned char *End = (unsigned char*)strstr((char*)DescP, "\nDescription");
- if (End == NULL)
- {
- End = &Buffer[Vf->Size];
- DescP = NULL;
- }
- else
- {
- ++End; // get the newline into the output
- DescP = skipDescriptionFields(End + strlen("Description"));
- }
- size_t const length = End - Start;
- if (length != 0 && FileFd::Write(STDOUT_FILENO, Start, length) == false)
- {
- delete [] Buffer;
- return false;
- }
- }
-
- // write a final newline after the last field
- cout<<endl;
-
- delete [] Buffer;
- return true;
-}
- /*}}}*/
-struct ExDescFile
-{
- pkgCache::DescFile *Df;
- pkgCache::VerIterator V;
- map_id_t ID;
-};
-
-// Search - Perform a search /*{{{*/
-// ---------------------------------------------------------------------
-/* This searches the package names and package descriptions for a pattern */
-static bool Search(CommandLine &CmdL)
-{
- bool const ShowFull = _config->FindB("APT::Cache::ShowFull",false);
- bool const NamesOnly = _config->FindB("APT::Cache::NamesOnly",false);
- unsigned int const NumPatterns = CmdL.FileSize() -1;
-
- pkgCacheFile CacheFile;
- pkgCache *Cache = CacheFile.GetPkgCache();
- pkgDepCache::Policy *Plcy = CacheFile.GetPolicy();
- if (unlikely(Cache == NULL || Plcy == NULL))
- return false;
-
- // Make sure there is at least one argument
- if (NumPatterns < 1)
- return _error->Error(_("You must give at least one search pattern"));
-
- // Compile the regex pattern
- regex_t *Patterns = new regex_t[NumPatterns];
- memset(Patterns,0,sizeof(*Patterns)*NumPatterns);
- for (unsigned I = 0; I != NumPatterns; I++)
- {
- if (regcomp(&Patterns[I],CmdL.FileList[I+1],REG_EXTENDED | REG_ICASE |
- REG_NOSUB) != 0)
- {
- for (; I != 0; I--)
- regfree(&Patterns[I]);
- return _error->Error("Regex compilation error");
- }
- }
-
- if (_error->PendingError() == true)
- {
- for (unsigned I = 0; I != NumPatterns; I++)
- regfree(&Patterns[I]);
- return false;
- }
-
- size_t const descCount = Cache->HeaderP->GroupCount + 1;
- ExDescFile *DFList = new ExDescFile[descCount];
- memset(DFList,0,sizeof(*DFList) * descCount);
-
- bool *PatternMatch = new bool[descCount * NumPatterns];
- memset(PatternMatch,false,sizeof(*PatternMatch) * descCount * NumPatterns);
-
- // Map versions that we want to write out onto the VerList array.
- for (pkgCache::GrpIterator G = Cache->GrpBegin(); G.end() == false; ++G)
- {
- size_t const PatternOffset = G->ID * NumPatterns;
- size_t unmatched = 0, matched = 0;
- for (unsigned I = 0; I < NumPatterns; ++I)
- {
- if (PatternMatch[PatternOffset + I] == true)
- ++matched;
- else if (regexec(&Patterns[I],G.Name(),0,0,0) == 0)
- PatternMatch[PatternOffset + I] = true;
- else
- ++unmatched;
- }
-
- // already dealt with this package?
- if (matched == NumPatterns)
- continue;
-
- // Doing names only, drop any that don't match..
- if (NamesOnly == true && unmatched == NumPatterns)
- continue;
-
- // Find the proper version to use
- pkgCache::PkgIterator P = G.FindPreferredPkg();
- if (P.end() == true)
- continue;
- pkgCache::VerIterator V = Plcy->GetCandidateVer(P);
- if (V.end() == false)
- {
- pkgCache::DescIterator const D = V.TranslatedDescription();
- //FIXME: packages without a description can't be found
- if (D.end() == true)
- continue;
- DFList[G->ID].Df = D.FileList();
- DFList[G->ID].V = V;
- DFList[G->ID].ID = G->ID;
- }
-
- if (unmatched == NumPatterns)
- continue;
-
- // Include all the packages that provide matching names too
- for (pkgCache::PrvIterator Prv = P.ProvidesList() ; Prv.end() == false; ++Prv)
- {
- pkgCache::VerIterator V = Plcy->GetCandidateVer(Prv.OwnerPkg());
- if (V.end() == true)
- continue;
-
- unsigned long id = Prv.OwnerPkg().Group()->ID;
- pkgCache::DescIterator const D = V.TranslatedDescription();
- //FIXME: packages without a description can't be found
- if (D.end() == true)
- continue;
- DFList[id].Df = D.FileList();
- DFList[id].V = V;
- DFList[id].ID = id;
-
- size_t const PrvPatternOffset = id * NumPatterns;
- for (unsigned I = 0; I < NumPatterns; ++I)
- PatternMatch[PrvPatternOffset + I] |= PatternMatch[PatternOffset + I];
- }
- }
-
- LocalitySort(&DFList->Df,Cache->HeaderP->GroupCount,sizeof(*DFList));
-
- // Create the text record parser
- pkgRecords Recs(*Cache);
- // Iterate over all the version records and check them
- for (ExDescFile *J = DFList; J->Df != 0; ++J)
- {
- pkgRecords::Parser &P = Recs.Lookup(pkgCache::DescFileIterator(*Cache,J->Df));
- size_t const PatternOffset = J->ID * NumPatterns;
-
- if (NamesOnly == false)
- {
- string const LongDesc = P.LongDesc();
- for (unsigned I = 0; I < NumPatterns; ++I)
- {
- if (PatternMatch[PatternOffset + I] == true)
- continue;
- else if (regexec(&Patterns[I],LongDesc.c_str(),0,0,0) == 0)
- PatternMatch[PatternOffset + I] = true;
- }
- }
-
- bool matchedAll = true;
- for (unsigned I = 0; I < NumPatterns; ++I)
- if (PatternMatch[PatternOffset + I] == false)
- {
- matchedAll = false;
- break;
- }
-
- if (matchedAll == true)
- {
- if (ShowFull == true)
- DisplayRecord(CacheFile, J->V);
- else
- printf("%s - %s\n",P.Name().c_str(),P.ShortDesc().c_str());
- }
- }
-
- delete [] DFList;
- delete [] PatternMatch;
- for (unsigned I = 0; I != NumPatterns; I++)
- regfree(&Patterns[I]);
- delete [] Patterns;
- if (ferror(stdout))
- return _error->Error("Write to stdout failed");
- return true;
-}
- /*}}}*/
projects / apt.git / blobdiff