apt-pkg/indexrecords.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: indexrecords.cc,v 1.1.2.4 2003/12/30 02:11:43 mdz Exp $
   4                                                                         /*}}}*/
   5 // Include Files                                                        /*{{{*/
   6 #include<config.h>
   7
   8 #include <apt-pkg/indexrecords.h>
   9 #include <apt-pkg/tagfile.h>
  10 #include <apt-pkg/error.h>
  11 #include <apt-pkg/strutl.h>
  12 #include <apt-pkg/configuration.h>
  13 #include <apt-pkg/fileutl.h>
  14 #include <apt-pkg/hashes.h>
  15
  16 #include <sys/stat.h>
  17 #include <clocale>
  18
  19 #include <apti18n.h>
  20                                                                         /*}}}*/
  21
  22 using std::string;
  23
  24 string indexRecords::GetDist() const
  25 {
  26    return this->Dist;
  27 }
  28
  29 bool indexRecords::CheckDist(const string MaybeDist) const
  30 {
  31    return (this->Dist == MaybeDist
  32            || this->Suite == MaybeDist);
  33 }
  34
  35 string indexRecords::GetExpectedDist() const
  36 {
  37    return this->ExpectedDist;
  38 }
  39
  40 time_t indexRecords::GetValidUntil() const
  41 {
  42    return this->ValidUntil;
  43 }
  44
  45 const indexRecords::checkSum *indexRecords::Lookup(const string MetaKey)
  46 {
  47    return Entries[MetaKey];
  48 }
  49
  50 bool indexRecords::Exists(string const &MetaKey) const
  51 {
  52    return Entries.count(MetaKey) == 1;
  53 }
  54
  55 bool indexRecords::Load(const string Filename)                          /*{{{*/
  56 {
  57    FileFd Fd(Filename, FileFd::ReadOnly);
  58    pkgTagFile TagFile(&Fd, Fd.Size() + 256); // XXX
  59    if (_error->PendingError() == true)
  60    {
  61       strprintf(ErrorText, _("Unable to parse Release file %s"),Filename.c_str());
  62       return false;
  63    }
  64
  65    pkgTagSection Section;
  66    const char *Start, *End;
  67    // Skip over sections beginning with ----- as this is an idicator for clearsigns
  68    do {
  69       if (TagFile.Step(Section) == false)
  70       {
  71          strprintf(ErrorText, _("No sections in Release file %s"), Filename.c_str());
  72          return false;
  73       }
  74
  75       Section.Get (Start, End, 0);
  76    } while (End - Start > 5 && strncmp(Start, "-----", 5) == 0);
  77
  78    Suite = Section.FindS("Suite");
  79    Dist = Section.FindS("Codename");
  80
  81    int i;
  82    for (i=0;HashString::SupportedHashes()[i] != NULL; i++)
  83    {
  84       if (!Section.Find(HashString::SupportedHashes()[i], Start, End))
  85          continue;
  86
  87       string Name;
  88       string Hash;
  89       unsigned long long Size;
  90       while (Start < End)
  91       {
  92          if (!parseSumData(Start, End, Name, Hash, Size))
  93             return false;
  94          indexRecords::checkSum *Sum = new indexRecords::checkSum;
  95          Sum->MetaKeyFilename = Name;
  96          Sum->Hash = HashString(HashString::SupportedHashes()[i],Hash);
  97          Sum->Size = Size;
  98          Entries[Name] = Sum;
  99       }
 100       break;
 101    }
 102
 103    if(HashString::SupportedHashes()[i] == NULL)
 104    {
 105       strprintf(ErrorText, _("No Hash entry in Release file %s"), Filename.c_str());
 106       return false;
 107    }
 108
 109    string Label = Section.FindS("Label");
 110    string StrDate = Section.FindS("Date");
 111    string StrValidUntil = Section.FindS("Valid-Until");
 112
 113    // if we have a Valid-Until header in the Release file, use it as default
 114    if (StrValidUntil.empty() == false)
 115    {
 116       if(RFC1123StrToTime(StrValidUntil.c_str(), ValidUntil) == false)
 117       {
 118          strprintf(ErrorText, _("Invalid 'Valid-Until' entry in Release file %s"), Filename.c_str());
 119          return false;
 120       }
 121    }
 122    // get the user settings for this archive and use what expires earlier
 123    int MaxAge = _config->FindI("Acquire::Max-ValidTime", 0);
 124    if (Label.empty() == false)
 125       MaxAge = _config->FindI(string("Acquire::Max-ValidTime::" + Label).c_str(), MaxAge);
 126    int MinAge = _config->FindI("Acquire::Min-ValidTime", 0);
 127    if (Label.empty() == false)
 128       MinAge = _config->FindI(string("Acquire::Min-ValidTime::" + Label).c_str(), MinAge);
 129
 130    if(MaxAge == 0 &&
 131       (MinAge == 0 || ValidUntil == 0)) // No user settings, use the one from the Release file
 132       return true;
 133
 134    time_t date;
 135    if (RFC1123StrToTime(StrDate.c_str(), date) == false)
 136    {
 137       strprintf(ErrorText, _("Invalid 'Date' entry in Release file %s"), Filename.c_str());
 138       return false;
 139    }
 140
 141    if (MinAge != 0 && ValidUntil != 0) {
 142       time_t const min_date = date + MinAge;
 143       if (ValidUntil < min_date)
 144          ValidUntil = min_date;
 145    }
 146    if (MaxAge != 0) {
 147       time_t const max_date = date + MaxAge;
 148       if (ValidUntil == 0 || ValidUntil > max_date)
 149          ValidUntil = max_date;
 150    }
 151
 152    return true;
 153 }
 154                                                                         /*}}}*/
 155 std::vector<string> indexRecords::MetaKeys()                            /*{{{*/
 156 {
 157    std::vector<std::string> keys;
 158    std::map<string,checkSum *>::iterator I = Entries.begin();
 159    while(I != Entries.end()) {
 160       keys.push_back((*I).first);
 161       ++I;
 162    }
 163    return keys;
 164 }
 165                                                                         /*}}}*/
 166 bool indexRecords::parseSumData(const char *&Start, const char *End,    /*{{{*/
 167                                    string &Name, string &Hash, unsigned long long &Size)
 168 {
 169    Name = "";
 170    Hash = "";
 171    Size = 0;
 172    /* Skip over the first blank */
 173    while ((*Start == '\t' || *Start == ' ' || *Start == '\n')
 174           && Start < End)
 175       Start++;
 176    if (Start >= End)
 177       return false;
 178
 179    /* Move EntryEnd to the end of the first entry (the hash) */
 180    const char *EntryEnd = Start;
 181    while ((*EntryEnd != '\t' && *EntryEnd != ' ')
 182           && EntryEnd < End)
 183       EntryEnd++;
 184    if (EntryEnd == End)
 185       return false;
 186
 187    Hash.append(Start, EntryEnd-Start);
 188
 189    /* Skip over intermediate blanks */
 190    Start = EntryEnd;
 191    while (*Start == '\t' || *Start == ' ')
 192       Start++;
 193    if (Start >= End)
 194       return false;
 195
 196    EntryEnd = Start;
 197    /* Find the end of the second entry (the size) */
 198    while ((*EntryEnd != '\t' && *EntryEnd != ' ' )
 199           && EntryEnd < End)
 200       EntryEnd++;
 201    if (EntryEnd == End)
 202       return false;
 203
 204    Size = strtoull (Start, NULL, 10);
 205
 206    /* Skip over intermediate blanks */
 207    Start = EntryEnd;
 208    while (*Start == '\t' || *Start == ' ')
 209       Start++;
 210    if (Start >= End)
 211       return false;
 212
 213    EntryEnd = Start;
 214    /* Find the end of the third entry (the filename) */
 215    while ((*EntryEnd != '\t' && *EntryEnd != ' ' && *EntryEnd != '\n')
 216           && EntryEnd < End)
 217       EntryEnd++;
 218
 219    Name.append(Start, EntryEnd-Start);
 220    Start = EntryEnd; //prepare for the next round
 221    return true;
 222 }
 223                                                                         /*}}}*/
 224 indexRecords::indexRecords()
 225 {
 226 }
 227
 228 indexRecords::indexRecords(const string ExpectedDist) :
 229    ExpectedDist(ExpectedDist), ValidUntil(0)
 230 {
 231 }