--- /dev/null
+// -*- mode: cpp; mode: fold -*-
+// Description /*{{{*/
+// $Id: deblistparser.cc,v 1.29.2.5 2004/01/06 01:43:44 mdz Exp $
+/* ######################################################################
+
+ Package Cache Generator - Generator for the cache structure.
+
+ This builds the cache structure from the abstract package list parser.
+
+ ##################################################################### */
+ /*}}}*/
+// Include Files /*{{{*/
+#include <apt-pkg/deblistparser.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/crc-16.h>
+#include <apt-pkg/md5.h>
+
+#include <ctype.h>
+
+#include <system.h>
+ /*}}}*/
+
+static debListParser::WordList PrioList[] = {{"important",pkgCache::State::Important},
+ {"required",pkgCache::State::Required},
+ {"standard",pkgCache::State::Standard},
+ {"optional",pkgCache::State::Optional},
+ {"extra",pkgCache::State::Extra},
+ {}};
+
+// ListParser::debListParser - Constructor /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+debListParser::debListParser(FileFd *File) : Tags(File)
+{
+ Arch = _config->Find("APT::architecture");
+}
+ /*}}}*/
+// ListParser::UniqFindTagWrite - Find the tag and write a unq string /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned long debListParser::UniqFindTagWrite(const char *Tag)
+{
+ const char *Start;
+ const char *Stop;
+ if (Section.Find(Tag,Start,Stop) == false)
+ return 0;
+ return WriteUniqString(Start,Stop - Start);
+}
+ /*}}}*/
+// ListParser::Package - Return the package name /*{{{*/
+// ---------------------------------------------------------------------
+/* This is to return the name of the package this section describes */
+string debListParser::Package()
+{
+ string Result = Section.FindS("Package");
+ if (Result.empty() == true)
+ _error->Error("Encountered a section with no Package: header");
+ return Result;
+}
+ /*}}}*/
+// ListParser::Version - Return the version string /*{{{*/
+// ---------------------------------------------------------------------
+/* This is to return the string describing the version in debian form,
+ epoch:upstream-release. If this returns the blank string then the
+ entry is assumed to only describe package properties */
+string debListParser::Version()
+{
+ return Section.FindS("Version");
+}
+ /*}}}*/
+// ListParser::NewVersion - Fill in the version structure /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debListParser::NewVersion(pkgCache::VerIterator Ver)
+{
+ Ver->Display = UniqFindTagWrite("Name");
+ if (Ver->Display == 0)
+ Ver->Display = UniqFindTagWrite("Maemo-Display-Name");
+
+ // Parse the section
+ Ver->Section = UniqFindTagWrite("Section");
+ Ver->Arch = UniqFindTagWrite("Architecture");
+
+ // Archive Size
+ Ver->Size = (unsigned)Section.FindI("Size");
+
+ // Unpacked Size (in K)
+ Ver->InstalledSize = (unsigned)Section.FindI("Installed-Size");
+ Ver->InstalledSize *= 1024;
+
+ // Priority
+ const char *Start;
+ const char *Stop;
+ if (Section.Find("Priority",Start,Stop) == true)
+ {
+ if (GrabWord(string(Start,Stop-Start),PrioList,Ver->Priority) == false)
+ Ver->Priority = pkgCache::State::Extra;
+ }
+
+ if (ParseDepends(Ver,"Depends",pkgCache::Dep::Depends) == false)
+ return false;
+ if (ParseDepends(Ver,"Pre-Depends",pkgCache::Dep::PreDepends) == false)
+ return false;
+ if (ParseDepends(Ver,"Suggests",pkgCache::Dep::Suggests) == false)
+ return false;
+ if (ParseDepends(Ver,"Recommends",pkgCache::Dep::Recommends) == false)
+ return false;
+ if (ParseDepends(Ver,"Conflicts",pkgCache::Dep::Conflicts) == false)
+ return false;
+ if (ParseDepends(Ver,"Breaks",pkgCache::Dep::DpkgBreaks) == false)
+ return false;
+ if (ParseDepends(Ver,"Replaces",pkgCache::Dep::Replaces) == false)
+ return false;
+
+ // Obsolete.
+ if (ParseDepends(Ver,"Optional",pkgCache::Dep::Suggests) == false)
+ return false;
+
+ if (ParseProvides(Ver) == false)
+ return false;
+
+ return true;
+}
+ /*}}}*/
+// ListParser::Description - Return the description string /*{{{*/
+// ---------------------------------------------------------------------
+/* This is to return the string describing the package in debian
+ form. If this returns the blank string then the entry is assumed to
+ only describe package properties */
+string debListParser::Description()
+{
+ if (DescriptionLanguage().empty())
+ return Section.FindS("Description");
+ else
+ return Section.FindS(("Description-" + pkgIndexFile::LanguageCode()).c_str());
+}
+ /*}}}*/
+// ListParser::DescriptionLanguage - Return the description lang string /*{{{*/
+// ---------------------------------------------------------------------
+/* This is to return the string describing the language of
+ description. If this returns the blank string then the entry is
+ assumed to describe original description. */
+string debListParser::DescriptionLanguage()
+{
+ return Section.FindS("Description").empty() ? pkgIndexFile::LanguageCode() : "";
+}
+ /*}}}*/
+// ListParser::Description - Return the description_md5 MD5SumValue /*{{{*/
+// ---------------------------------------------------------------------
+/* This is to return the md5 string to allow the check if it is the right
+ description. If no Description-md5 is found in the section it will be
+ calculated.
+ */
+MD5SumValue debListParser::Description_md5()
+{
+ string value = Section.FindS("Description-md5");
+
+ if (value.empty())
+ {
+ MD5Summation md5;
+ md5.Add((Description() + "\n").c_str());
+ return md5.Result();
+ } else
+ return MD5SumValue(value);
+}
+ /*}}}*/
+// ListParser::UsePackage - Update a package structure /*{{{*/
+// ---------------------------------------------------------------------
+/* This is called to update the package with any new information
+ that might be found in the section */
+bool debListParser::UsePackage(pkgCache::PkgIterator Pkg,
+ pkgCache::VerIterator Ver)
+{
+ if (Pkg->Display == 0)
+ Pkg->Display = UniqFindTagWrite("Name");
+ if (Pkg->Display == 0)
+ Pkg->Display = UniqFindTagWrite("Maemo-Display-Name");
+ if (Pkg->Section == 0)
+ Pkg->Section = UniqFindTagWrite("Section");
+ if (Section.FindFlag("Essential",Pkg->Flags,pkgCache::Flag::Essential) == false)
+ return false;
+ if (Section.FindFlag("Important",Pkg->Flags,pkgCache::Flag::Important) == false)
+ return false;
+
+ if (strcmp(Pkg.Name(),"apt") == 0)
+ Pkg->Flags |= pkgCache::Flag::Important;
+
+ if (ParseStatus(Pkg,Ver) == false)
+ return false;
+ return true;
+}
+ /*}}}*/
+// ListParser::VersionHash - Compute a unique hash for this version /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned short debListParser::VersionHash()
+{
+ const char *Sections[] ={"Installed-Size",
+ "Depends",
+ "Pre-Depends",
+// "Suggests",
+// "Recommends",
+ "Conflicts",
+ "Breaks",
+ "Replaces",0};
+ unsigned long Result = INIT_FCS;
+ char S[1024];
+ for (const char **I = Sections; *I != 0; I++)
+ {
+ const char *Start;
+ const char *End;
+ if (Section.Find(*I,Start,End) == false || End - Start >= (signed)sizeof(S))
+ continue;
+
+ /* Strip out any spaces from the text, this undoes dpkgs reformatting
+ of certain fields. dpkg also has the rather interesting notion of
+ reformatting depends operators < -> <= */
+ char *I = S;
+ for (; Start != End; Start++)
+ {
+ if (isspace(*Start) == 0)
+ *I++ = tolower(*Start);
+ if (*Start == '<' && Start[1] != '<' && Start[1] != '=')
+ *I++ = '=';
+ if (*Start == '>' && Start[1] != '>' && Start[1] != '=')
+ *I++ = '=';
+ }
+
+ Result = AddCRC16(Result,S,I - S);
+ }
+
+ return Result;
+}
+ /*}}}*/
+// ListParser::ParseStatus - Parse the status field /*{{{*/
+// ---------------------------------------------------------------------
+/* Status lines are of the form,
+ Status: want flag status
+ want = unknown, install, hold, deinstall, purge
+ flag = ok, reinstreq, hold, hold-reinstreq
+ status = not-installed, unpacked, half-configured,
+ half-installed, config-files, post-inst-failed,
+ removal-failed, installed
+
+ Some of the above are obsolete (I think?) flag = hold-* and
+ status = post-inst-failed, removal-failed at least.
+ */
+bool debListParser::ParseStatus(pkgCache::PkgIterator Pkg,
+ pkgCache::VerIterator Ver)
+{
+ const char *Start;
+ const char *Stop;
+ if (Section.Find("Status",Start,Stop) == false)
+ return true;
+
+ // Isolate the first word
+ const char *I = Start;
+ for(; I < Stop && *I != ' '; I++);
+ if (I >= Stop || *I != ' ')
+ return _error->Error("Malformed Status line");
+
+ // Process the want field
+ WordList WantList[] = {{"unknown",pkgCache::State::Unknown},
+ {"install",pkgCache::State::Install},
+ {"hold",pkgCache::State::Hold},
+ {"deinstall",pkgCache::State::DeInstall},
+ {"purge",pkgCache::State::Purge},
+ {}};
+ if (GrabWord(string(Start,I-Start),WantList,Pkg->SelectedState) == false)
+ return _error->Error("Malformed 1st word in the Status line");
+
+ // Isloate the next word
+ I++;
+ Start = I;
+ for(; I < Stop && *I != ' '; I++);
+ if (I >= Stop || *I != ' ')
+ return _error->Error("Malformed status line, no 2nd word");
+
+ // Process the flag field
+ WordList FlagList[] = {{"ok",pkgCache::State::Ok},
+ {"reinstreq",pkgCache::State::ReInstReq},
+ {"hold",pkgCache::State::HoldInst},
+ {"hold-reinstreq",pkgCache::State::HoldReInstReq},
+ {}};
+ if (GrabWord(string(Start,I-Start),FlagList,Pkg->InstState) == false)
+ return _error->Error("Malformed 2nd word in the Status line");
+
+ // Isloate the last word
+ I++;
+ Start = I;
+ for(; I < Stop && *I != ' '; I++);
+ if (I != Stop)
+ return _error->Error("Malformed Status line, no 3rd word");
+
+ // Process the flag field
+ WordList StatusList[] = {{"not-installed",pkgCache::State::NotInstalled},
+ {"unpacked",pkgCache::State::UnPacked},
+ {"half-configured",pkgCache::State::HalfConfigured},
+ {"installed",pkgCache::State::Installed},
+ {"half-installed",pkgCache::State::HalfInstalled},
+ {"config-files",pkgCache::State::ConfigFiles},
+ {"triggers-awaited",pkgCache::State::TriggersAwaited},
+ {"triggers-pending",pkgCache::State::TriggersPending},
+ {"post-inst-failed",pkgCache::State::HalfConfigured},
+ {"removal-failed",pkgCache::State::HalfInstalled},
+ {}};
+ if (GrabWord(string(Start,I-Start),StatusList,Pkg->CurrentState) == false)
+ return _error->Error("Malformed 3rd word in the Status line");
+
+ /* A Status line marks the package as indicating the current
+ version as well. Only if it is actually installed.. Otherwise
+ the interesting dpkg handling of the status file creates bogus
+ entries. */
+ if (!(Pkg->CurrentState == pkgCache::State::NotInstalled ||
+ Pkg->CurrentState == pkgCache::State::ConfigFiles))
+ {
+ if (Ver.end() == true)
+ _error->Warning("Encountered status field in a non-version description");
+ else
+ Pkg->CurrentVer = Ver.Index();
+ }
+
+ return true;
+}
+
+const char *debListParser::ConvertRelation(const char *I,unsigned int &Op)
+{
+ // Determine the operator
+ switch (*I)
+ {
+ case '<':
+ I++;
+ if (*I == '=')
+ {
+ I++;
+ Op = pkgCache::Dep::LessEq;
+ break;
+ }
+
+ if (*I == '<')
+ {
+ I++;
+ Op = pkgCache::Dep::Less;
+ break;
+ }
+
+ // < is the same as <= and << is really Cs < for some reason
+ Op = pkgCache::Dep::LessEq;
+ break;
+
+ case '>':
+ I++;
+ if (*I == '=')
+ {
+ I++;
+ Op = pkgCache::Dep::GreaterEq;
+ break;
+ }
+
+ if (*I == '>')
+ {
+ I++;
+ Op = pkgCache::Dep::Greater;
+ break;
+ }
+
+ // > is the same as >= and >> is really Cs > for some reason
+ Op = pkgCache::Dep::GreaterEq;
+ break;
+
+ case '=':
+ Op = pkgCache::Dep::Equals;
+ I++;
+ break;
+
+ // HACK around bad package definitions
+ default:
+ Op = pkgCache::Dep::Equals;
+ break;
+ }
+ return I;
+}
+
+ /*}}}*/
+// ListParser::ParseDepends - Parse a dependency element /*{{{*/
+// ---------------------------------------------------------------------
+/* This parses the dependency elements out of a standard string in place,
+ bit by bit. */
+const char *debListParser::ParseDepends(const char *Start,const char *Stop,
+ string &Package,string &Ver,
+ unsigned int &Op, bool ParseArchFlags)
+{
+ // Strip off leading space
+ for (;Start != Stop && isspace(*Start) != 0; Start++);
+
+ // Parse off the package name
+ const char *I = Start;
+ for (;I != Stop && isspace(*I) == 0 && *I != '(' && *I != ')' &&
+ *I != ',' && *I != '|'; I++);
+
+ // Malformed, no '('
+ if (I != Stop && *I == ')')
+ return 0;
+
+ if (I == Start)
+ return 0;
+
+ // Stash the package name
+ Package.assign(Start,I - Start);
+
+ // Skip white space to the '('
+ for (;I != Stop && isspace(*I) != 0 ; I++);
+
+ // Parse a version
+ if (I != Stop && *I == '(')
+ {
+ // Skip the '('
+ for (I++; I != Stop && isspace(*I) != 0 ; I++);
+ if (I + 3 >= Stop)
+ return 0;
+ I = ConvertRelation(I,Op);
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+ Start = I;
+ for (;I != Stop && *I != ')'; I++);
+ if (I == Stop || Start == I)
+ return 0;
+
+ // Skip trailing whitespace
+ const char *End = I;
+ for (; End > Start && isspace(End[-1]); End--);
+
+ Ver.assign(Start,End-Start);
+ I++;
+ }
+ else
+ {
+ Ver.clear();
+ Op = pkgCache::Dep::NoOp;
+ }
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+
+ if (ParseArchFlags == true)
+ {
+ string arch = _config->Find("APT::Architecture");
+
+ // Parse an architecture
+ if (I != Stop && *I == '[')
+ {
+ // malformed
+ I++;
+ if (I == Stop)
+ return 0;
+
+ const char *End = I;
+ bool Found = false;
+ bool NegArch = false;
+ while (I != Stop)
+ {
+ // look for whitespace or ending ']'
+ while (End != Stop && !isspace(*End) && *End != ']')
+ End++;
+
+ if (End == Stop)
+ return 0;
+
+ if (*I == '!')
+ {
+ NegArch = true;
+ I++;
+ }
+
+ if (stringcmp(arch,I,End) == 0)
+ Found = true;
+
+ if (*End++ == ']') {
+ I = End;
+ break;
+ }
+
+ I = End;
+ for (;I != Stop && isspace(*I) != 0; I++);
+ }
+
+ if (NegArch)
+ Found = !Found;
+
+ if (Found == false)
+ Package = ""; /* not for this arch */
+ }
+
+ // Skip whitespace
+ for (;I != Stop && isspace(*I) != 0; I++);
+ }
+
+ if (I != Stop && *I == '|')
+ Op |= pkgCache::Dep::Or;
+
+ if (I == Stop || *I == ',' || *I == '|')
+ {
+ if (I != Stop)
+ for (I++; I != Stop && isspace(*I) != 0; I++);
+ return I;
+ }
+
+ return 0;
+}
+ /*}}}*/
+// ListParser::ParseDepends - Parse a dependency list /*{{{*/
+// ---------------------------------------------------------------------
+/* This is the higher level depends parser. It takes a tag and generates
+ a complete depends tree for the given version. */
+bool debListParser::ParseDepends(pkgCache::VerIterator Ver,
+ const char *Tag,unsigned int Type)
+{
+ const char *Start;
+ const char *Stop;
+ if (Section.Find(Tag,Start,Stop) == false)
+ return true;
+
+ string Package;
+ string Version;
+ unsigned int Op;
+
+ while (1)
+ {
+ Start = ParseDepends(Start,Stop,Package,Version,Op);
+ if (Start == 0)
+ return _error->Error("Problem parsing dependency %s",Tag);
+
+ if (NewDepends(Ver,Package,Version,Op,Type) == false)
+ return false;
+ if (Start == Stop)
+ break;
+ }
+ return true;
+}
+ /*}}}*/
+// ListParser::ParseProvides - Parse the provides list /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debListParser::ParseProvides(pkgCache::VerIterator Ver)
+{
+ const char *Start;
+ const char *Stop;
+ if (Section.Find("Provides",Start,Stop) == false)
+ return true;
+
+ string Package;
+ string Version;
+ unsigned int Op;
+
+ while (1)
+ {
+ Start = ParseDepends(Start,Stop,Package,Version,Op);
+ if (Start == 0)
+ return _error->Error("Problem parsing Provides line");
+ if (Op != pkgCache::Dep::NoOp) {
+ _error->Warning("Ignoring Provides line with DepCompareOp for package %s", Package.c_str());
+ } else {
+ if (NewProvides(Ver,Package,Version) == false)
+ return false;
+ }
+
+ if (Start == Stop)
+ break;
+ }
+
+ return true;
+}
+ /*}}}*/
+// ListParser::GrabWord - Matches a word and returns /*{{{*/
+// ---------------------------------------------------------------------
+/* Looks for a word in a list of words - for ParseStatus */
+bool debListParser::GrabWord(string Word,WordList *List,unsigned char &Out)
+{
+ for (unsigned int C = 0; List[C].Str != 0; C++)
+ {
+ if (strcasecmp(Word.c_str(),List[C].Str) == 0)
+ {
+ Out = List[C].Val;
+ return true;
+ }
+ }
+ return false;
+}
+ /*}}}*/
+// ListParser::Step - Move to the next section in the file /*{{{*/
+// ---------------------------------------------------------------------
+/* This has to be carefull to only process the correct architecture */
+bool debListParser::Step()
+{
+ iOffset = Tags.Offset();
+ while (Tags.Step(Section) == true)
+ {
+ /* See if this is the correct Architecture, if it isn't then we
+ drop the whole section. A missing arch tag only happens (in theory)
+ inside the Status file, so that is a positive return */
+ const char *Start;
+ const char *Stop;
+ if (Section.Find("Architecture",Start,Stop) == false)
+ return true;
+
+ if (stringcmp(Arch,Start,Stop) == 0)
+ return true;
+
+ if (stringcmp(Start,Stop,"all") == 0)
+ return true;
+
+ iOffset = Tags.Offset();
+ }
+ return false;
+}
+ /*}}}*/
+// ListParser::LoadReleaseInfo - Load the release information /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debListParser::LoadReleaseInfo(pkgCache::PkgFileIterator FileI,
+ FileFd &File, string component)
+{
+ pkgTagFile Tags(&File, File.Size() + 256); // XXX
+ pkgTagSection Section;
+ if (Tags.Step(Section) == false)
+ return false;
+
+ //mvo: I don't think we need to fill that in (it's unused since apt-0.6)
+ //FileI->Architecture = WriteUniqString(Arch);
+
+ // apt-secure does no longer download individual (per-section) Release
+ // file. to provide Component pinning we use the section name now
+ FileI->Component = WriteUniqString(component);
+
+ const char *Start;
+ const char *Stop;
+ if (Section.Find("Suite",Start,Stop) == true)
+ FileI->Archive = WriteUniqString(Start,Stop - Start);
+ if (Section.Find("Component",Start,Stop) == true)
+ FileI->Component = WriteUniqString(Start,Stop - Start);
+ if (Section.Find("Version",Start,Stop) == true)
+ FileI->Version = WriteUniqString(Start,Stop - Start);
+ if (Section.Find("Origin",Start,Stop) == true)
+ FileI->Origin = WriteUniqString(Start,Stop - Start);
+ if (Section.Find("Label",Start,Stop) == true)
+ FileI->Label = WriteUniqString(Start,Stop - Start);
+ if (Section.Find("Architecture",Start,Stop) == true)
+ FileI->Architecture = WriteUniqString(Start,Stop - Start);
+
+ if (Section.FindFlag("NotAutomatic",FileI->Flags,
+ pkgCache::Flag::NotAutomatic) == false)
+ _error->Warning("Bad NotAutomatic flag");
+
+ return !_error->PendingError();
+}
+ /*}}}*/
+// ListParser::GetPrio - Convert the priority from a string /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+unsigned char debListParser::GetPrio(string Str)
+{
+ unsigned char Out;
+ if (GrabWord(Str,PrioList,Out) == false)
+ Out = pkgCache::State::Extra;
+
+ return Out;
+}
+ /*}}}*/
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