apt-pkg/contrib/configuration.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 // $Id: configuration.cc,v 1.28 2004/04/30 04:00:15 mdz Exp $
   4 /* ######################################################################
   5
   6    Configuration Class
   7
   8    This class provides a configuration file and command line parser
   9    for a tree-oriented configuration environment. All runtime configuration
  10    is stored in here.
  11
  12    This source is placed in the Public Domain, do with it what you will
  13    It was originally written by Jason Gunthorpe <jgg@debian.org>.
  14
  15    ##################################################################### */
  16                                                                         /*}}}*/
  17 // Include files                                                        /*{{{*/
  18 #include <apt-pkg/configuration.h>
  19 #include <apt-pkg/error.h>
  20 #include <apt-pkg/strutl.h>
  21 #include <apt-pkg/fileutl.h>
  22 #include <apti18n.h>
  23
  24 #include <vector>
  25 #include <fstream>
  26 #include <iostream>
  27
  28 using namespace std;
  29                                                                         /*}}}*/
  30
  31 Configuration *_config = new Configuration;
  32
  33 // Configuration::Configuration - Constructor                           /*{{{*/
  34 // ---------------------------------------------------------------------
  35 /* */
  36 Configuration::Configuration() : ToFree(true)
  37 {
  38    Root = new Item;
  39 }
  40 Configuration::Configuration(const Item *Root) : Root((Item *)Root), ToFree(false)
  41 {
  42 };
  43
  44                                                                         /*}}}*/
  45 // Configuration::~Configuration - Destructor                           /*{{{*/
  46 // ---------------------------------------------------------------------
  47 /* */
  48 Configuration::~Configuration()
  49 {
  50    if (ToFree == false)
  51       return;
  52
  53    Item *Top = Root;
  54    for (; Top != 0;)
  55    {
  56       if (Top->Child != 0)
  57       {
  58          Top = Top->Child;
  59          continue;
  60       }
  61
  62       while (Top != 0 && Top->Next == 0)
  63       {
  64          Item *Parent = Top->Parent;
  65          delete Top;
  66          Top = Parent;
  67       }
  68       if (Top != 0)
  69       {
  70          Item *Next = Top->Next;
  71          delete Top;
  72          Top = Next;
  73       }
  74    }
  75 }
  76                                                                         /*}}}*/
  77 // Configuration::Lookup - Lookup a single item                         /*{{{*/
  78 // ---------------------------------------------------------------------
  79 /* This will lookup a single item by name below another item. It is a
  80    helper function for the main lookup function */
  81 Configuration::Item *Configuration::Lookup(Item *Head,const char *S,
  82                                            unsigned long const &Len,bool const &Create)
  83 {
  84    int Res = 1;
  85    Item *I = Head->Child;
  86    Item **Last = &Head->Child;
  87
  88    // Empty strings match nothing. They are used for lists.
  89    if (Len != 0)
  90    {
  91       for (; I != 0; Last = &I->Next, I = I->Next)
  92          if ((Res = stringcasecmp(I->Tag,S,S + Len)) == 0)
  93             break;
  94    }
  95    else
  96       for (; I != 0; Last = &I->Next, I = I->Next);
  97
  98    if (Res == 0)
  99       return I;
 100    if (Create == false)
 101       return 0;
 102
 103    I = new Item;
 104    I->Tag.assign(S,Len);
 105    I->Next = *Last;
 106    I->Parent = Head;
 107    *Last = I;
 108    return I;
 109 }
 110                                                                         /*}}}*/
 111 // Configuration::Lookup - Lookup a fully scoped item                   /*{{{*/
 112 // ---------------------------------------------------------------------
 113 /* This performs a fully scoped lookup of a given name, possibly creating
 114    new items */
 115 Configuration::Item *Configuration::Lookup(const char *Name,bool const &Create)
 116 {
 117    if (Name == 0)
 118       return Root->Child;
 119
 120    const char *Start = Name;
 121    const char *End = Start + strlen(Name);
 122    const char *TagEnd = Name;
 123    Item *Itm = Root;
 124    for (; End - TagEnd >= 2; TagEnd++)
 125    {
 126       if (TagEnd[0] == ':' && TagEnd[1] == ':')
 127       {
 128          Itm = Lookup(Itm,Start,TagEnd - Start,Create);
 129          if (Itm == 0)
 130             return 0;
 131          TagEnd = Start = TagEnd + 2;
 132       }
 133    }
 134
 135    // This must be a trailing ::, we create unique items in a list
 136    if (End - Start == 0)
 137    {
 138       if (Create == false)
 139          return 0;
 140    }
 141
 142    Itm = Lookup(Itm,Start,End - Start,Create);
 143    return Itm;
 144 }
 145                                                                         /*}}}*/
 146 // Configuration::Find - Find a value                                   /*{{{*/
 147 // ---------------------------------------------------------------------
 148 /* */
 149 string Configuration::Find(const char *Name,const char *Default) const
 150 {
 151    const Item *Itm = Lookup(Name);
 152    if (Itm == 0 || Itm->Value.empty() == true)
 153    {
 154       if (Default == 0)
 155          return "";
 156       else
 157          return Default;
 158    }
 159
 160    return Itm->Value;
 161 }
 162                                                                         /*}}}*/
 163 // Configuration::FindFile - Find a Filename                            /*{{{*/
 164 // ---------------------------------------------------------------------
 165 /* Directories are stored as the base dir in the Parent node and the
 166    sub directory in sub nodes with the final node being the end filename
 167  */
 168 string Configuration::FindFile(const char *Name,const char *Default) const
 169 {
 170    const Item *RootItem = Lookup("RootDir");
 171    std::string rootDir =  (RootItem == 0) ? "" : RootItem->Value;
 172    if(rootDir.size() > 0 && rootDir[rootDir.size() - 1] != '/')
 173      rootDir.push_back('/');
 174
 175    const Item *Itm = Lookup(Name);
 176    if (Itm == 0 || Itm->Value.empty() == true)
 177    {
 178       if (Default == 0)
 179          return rootDir;
 180       else
 181          return rootDir + Default;
 182    }
 183
 184    string val = Itm->Value;
 185    while (Itm->Parent != 0 && Itm->Parent->Value.empty() == false)
 186    {
 187       // Absolute
 188       if (val.length() >= 1 && val[0] == '/')
 189          break;
 190
 191       // ~/foo or ./foo
 192       if (val.length() >= 2 && (val[0] == '~' || val[0] == '.') && val[1] == '/')
 193          break;
 194
 195       // ../foo
 196       if (val.length() >= 3 && val[0] == '.' && val[1] == '.' && val[2] == '/')
 197          break;
 198
 199       if (Itm->Parent->Value.end()[-1] != '/')
 200          val.insert(0, "/");
 201
 202       val.insert(0, Itm->Parent->Value);
 203       Itm = Itm->Parent;
 204    }
 205
 206    return rootDir + val;
 207 }
 208                                                                         /*}}}*/
 209 // Configuration::FindDir - Find a directory name                       /*{{{*/
 210 // ---------------------------------------------------------------------
 211 /* This is like findfile execept the result is terminated in a / */
 212 string Configuration::FindDir(const char *Name,const char *Default) const
 213 {
 214    string Res = FindFile(Name,Default);
 215    if (Res.end()[-1] != '/')
 216       return Res + '/';
 217    return Res;
 218 }
 219                                                                         /*}}}*/
 220 // Configuration::FindVector - Find a vector of values                  /*{{{*/
 221 // ---------------------------------------------------------------------
 222 /* Returns a vector of config values under the given item */
 223 vector<string> Configuration::FindVector(const char *Name) const
 224 {
 225    vector<string> Vec;
 226    const Item *Top = Lookup(Name);
 227    if (Top == NULL)
 228       return Vec;
 229
 230    Item *I = Top->Child;
 231    while(I != NULL)
 232    {
 233       Vec.push_back(I->Value);
 234       I = I->Next;
 235    }
 236    return Vec;
 237 }
 238                                                                         /*}}}*/
 239 // Configuration::FindI - Find an integer value                         /*{{{*/
 240 // ---------------------------------------------------------------------
 241 /* */
 242 int Configuration::FindI(const char *Name,int const &Default) const
 243 {
 244    const Item *Itm = Lookup(Name);
 245    if (Itm == 0 || Itm->Value.empty() == true)
 246       return Default;
 247
 248    char *End;
 249    int Res = strtol(Itm->Value.c_str(),&End,0);
 250    if (End == Itm->Value.c_str())
 251       return Default;
 252
 253    return Res;
 254 }
 255                                                                         /*}}}*/
 256 // Configuration::FindB - Find a boolean type                           /*{{{*/
 257 // ---------------------------------------------------------------------
 258 /* */
 259 bool Configuration::FindB(const char *Name,bool const &Default) const
 260 {
 261    const Item *Itm = Lookup(Name);
 262    if (Itm == 0 || Itm->Value.empty() == true)
 263       return Default;
 264
 265    return StringToBool(Itm->Value,Default);
 266 }
 267                                                                         /*}}}*/
 268 // Configuration::FindAny - Find an arbitrary type                      /*{{{*/
 269 // ---------------------------------------------------------------------
 270 /* a key suffix of /f, /d, /b or /i calls Find{File,Dir,B,I} */
 271 string Configuration::FindAny(const char *Name,const char *Default) const
 272 {
 273    string key = Name;
 274    char type = 0;
 275
 276    if (key.size() > 2 && key.end()[-2] == '/')
 277    {
 278       type = key.end()[-1];
 279       key.resize(key.size() - 2);
 280    }
 281
 282    switch (type)
 283    {
 284       // file
 285       case 'f':
 286       return FindFile(key.c_str(), Default);
 287
 288       // directory
 289       case 'd':
 290       return FindDir(key.c_str(), Default);
 291
 292       // bool
 293       case 'b':
 294       return FindB(key, Default) ? "true" : "false";
 295
 296       // int
 297       case 'i':
 298       {
 299          char buf[16];
 300          snprintf(buf, sizeof(buf)-1, "%d", FindI(key, Default ? atoi(Default) : 0 ));
 301          return buf;
 302       }
 303    }
 304
 305    // fallback
 306    return Find(Name, Default);
 307 }
 308                                                                         /*}}}*/
 309 // Configuration::CndSet - Conditinal Set a value                       /*{{{*/
 310 // ---------------------------------------------------------------------
 311 /* This will not overwrite */
 312 void Configuration::CndSet(const char *Name,const string &Value)
 313 {
 314    Item *Itm = Lookup(Name,true);
 315    if (Itm == 0)
 316       return;
 317    if (Itm->Value.empty() == true)
 318       Itm->Value = Value;
 319 }
 320                                                                         /*}}}*/
 321 // Configuration::Set - Set an integer value                            /*{{{*/
 322 // ---------------------------------------------------------------------
 323 /* */
 324 void Configuration::CndSet(const char *Name,int const Value)
 325 {
 326    Item *Itm = Lookup(Name,true);
 327    if (Itm == 0 || Itm->Value.empty() == false)
 328       return;
 329    char S[300];
 330    snprintf(S,sizeof(S),"%i",Value);
 331    Itm->Value = S;
 332 }
 333                                                                         /*}}}*/
 334 // Configuration::Set - Set a value                                     /*{{{*/
 335 // ---------------------------------------------------------------------
 336 /* */
 337 void Configuration::Set(const char *Name,const string &Value)
 338 {
 339    Item *Itm = Lookup(Name,true);
 340    if (Itm == 0)
 341       return;
 342    Itm->Value = Value;
 343 }
 344                                                                         /*}}}*/
 345 // Configuration::Set - Set an integer value                            /*{{{*/
 346 // ---------------------------------------------------------------------
 347 /* */
 348 void Configuration::Set(const char *Name,int const Value)
 349 {
 350    Item *Itm = Lookup(Name,true);
 351    if (Itm == 0)
 352       return;
 353    char S[300];
 354    snprintf(S,sizeof(S),"%i",Value);
 355    Itm->Value = S;
 356 }
 357                                                                         /*}}}*/
 358 // Configuration::Clear - Clear an single value from a list             /*{{{*/
 359 // ---------------------------------------------------------------------
 360 /* */
 361 void Configuration::Clear(string const &Name, int const &Value)
 362 {
 363    char S[300];
 364    snprintf(S,sizeof(S),"%i",Value);
 365    Clear(Name, S);
 366 }
 367                                                                         /*}}}*/
 368 // Configuration::Clear - Clear an single value from a list             /*{{{*/
 369 // ---------------------------------------------------------------------
 370 /* */
 371 void Configuration::Clear(string const &Name, string const &Value)
 372 {
 373    Item *Top = Lookup(Name.c_str(),false);
 374    if (Top == 0 || Top->Child == 0)
 375       return;
 376
 377    Item *Tmp, *Prev, *I;
 378    Prev = I = Top->Child;
 379
 380    while(I != NULL)
 381    {
 382       if(I->Value == Value)
 383       {
 384          Tmp = I;
 385          // was first element, point parent to new first element
 386          if(Top->Child == Tmp)
 387             Top->Child = I->Next;
 388          I = I->Next;
 389          Prev->Next = I;
 390          delete Tmp;
 391       } else {
 392          Prev = I;
 393          I = I->Next;
 394       }
 395    }
 396
 397 }
 398                                                                         /*}}}*/
 399 // Configuration::Clear - Clear an entire tree                          /*{{{*/
 400 // ---------------------------------------------------------------------
 401 /* */
 402 void Configuration::Clear(string const &Name)
 403 {
 404    Item *Top = Lookup(Name.c_str(),false);
 405    if (Top == 0)
 406       return;
 407
 408    Top->Value.clear();
 409    Item *Stop = Top;
 410    Top = Top->Child;
 411    Stop->Child = 0;
 412    for (; Top != 0;)
 413    {
 414       if (Top->Child != 0)
 415       {
 416          Top = Top->Child;
 417          continue;
 418       }
 419
 420       while (Top != 0 && Top->Next == 0)
 421       {
 422          Item *Tmp = Top;
 423          Top = Top->Parent;
 424          delete Tmp;
 425
 426          if (Top == Stop)
 427             return;
 428       }
 429
 430       Item *Tmp = Top;
 431       if (Top != 0)
 432          Top = Top->Next;
 433       delete Tmp;
 434    }
 435 }
 436                                                                         /*}}}*/
 437 // Configuration::Exists - Returns true if the Name exists              /*{{{*/
 438 // ---------------------------------------------------------------------
 439 /* */
 440 bool Configuration::Exists(const char *Name) const
 441 {
 442    const Item *Itm = Lookup(Name);
 443    if (Itm == 0)
 444       return false;
 445    return true;
 446 }
 447                                                                         /*}}}*/
 448 // Configuration::ExistsAny - Returns true if the Name, possibly        /*{{{*/
 449 // ---------------------------------------------------------------------
 450 /* qualified by /[fdbi] exists */
 451 bool Configuration::ExistsAny(const char *Name) const
 452 {
 453    string key = Name;
 454
 455    if (key.size() > 2 && key.end()[-2] == '/')
 456    {
 457       if (key.find_first_of("fdbi",key.size()-1) < key.size())
 458       {
 459          key.resize(key.size() - 2);
 460          if (Exists(key.c_str()))
 461             return true;
 462       }
 463       else
 464       {
 465          _error->Warning(_("Unrecognized type abbreviation: '%c'"), key.end()[-3]);
 466       }
 467    }
 468    return Exists(Name);
 469 }
 470                                                                         /*}}}*/
 471 // Configuration::Dump - Dump the config                                /*{{{*/
 472 // ---------------------------------------------------------------------
 473 /* Dump the entire configuration space */
 474 void Configuration::Dump(ostream& str)
 475 {
 476    /* Write out all of the configuration directives by walking the
 477       configuration tree */
 478    const Configuration::Item *Top = Tree(0);
 479    for (; Top != 0;)
 480    {
 481       str << Top->FullTag() << " \"" << Top->Value << "\";" << endl;
 482
 483       if (Top->Child != 0)
 484       {
 485          Top = Top->Child;
 486          continue;
 487       }
 488
 489       while (Top != 0 && Top->Next == 0)
 490          Top = Top->Parent;
 491       if (Top != 0)
 492          Top = Top->Next;
 493    }
 494 }
 495                                                                         /*}}}*/
 496
 497 // Configuration::Item::FullTag - Return the fully scoped tag           /*{{{*/
 498 // ---------------------------------------------------------------------
 499 /* Stop sets an optional max recursion depth if this item is being viewed as
 500    part of a sub tree. */
 501 string Configuration::Item::FullTag(const Item *Stop) const
 502 {
 503    if (Parent == 0 || Parent->Parent == 0 || Parent == Stop)
 504       return Tag;
 505    return Parent->FullTag(Stop) + "::" + Tag;
 506 }
 507                                                                         /*}}}*/
 508
 509 // ReadConfigFile - Read a configuration file                           /*{{{*/
 510 // ---------------------------------------------------------------------
 511 /* The configuration format is very much like the named.conf format
 512    used in bind8, in fact this routine can parse most named.conf files.
 513    Sectional config files are like bind's named.conf where there are
 514    sections like 'zone "foo.org" { .. };' This causes each section to be
 515    added in with a tag like "zone::foo.org" instead of being split
 516    tag/value. AsSectional enables Sectional parsing.*/
 517 bool ReadConfigFile(Configuration &Conf,const string &FName,bool const &AsSectional,
 518                     unsigned const &Depth)
 519 {
 520    // Open the stream for reading
 521    ifstream F(FName.c_str(),ios::in);
 522    if (!F != 0)
 523       return _error->Errno("ifstream::ifstream",_("Opening configuration file %s"),FName.c_str());
 524
 525    string LineBuffer;
 526    string Stack[100];
 527    unsigned int StackPos = 0;
 528
 529    // Parser state
 530    string ParentTag;
 531
 532    int CurLine = 0;
 533    bool InComment = false;
 534    while (F.eof() == false)
 535    {
 536       // The raw input line.
 537       std::string Input;
 538       // The input line with comments stripped.
 539       std::string Fragment;
 540
 541       // Grab the next line of F and place it in Input.
 542       do
 543         {
 544           char *Buffer = new char[1024];
 545
 546           F.clear();
 547           F.getline(Buffer,sizeof(Buffer) / 2);
 548
 549           Input += Buffer;
 550           delete[] Buffer;
 551         }
 552       while (F.fail() && !F.eof());
 553
 554       // Expand tabs in the input line and remove leading and trailing
 555       // whitespace.
 556       {
 557         const int BufferSize = Input.size() * 8 + 1;
 558         char *Buffer = new char[BufferSize];
 559         try
 560           {
 561             memcpy(Buffer, Input.c_str(), Input.size() + 1);
 562
 563             _strtabexpand(Buffer, BufferSize);
 564             _strstrip(Buffer);
 565             Input = Buffer;
 566           }
 567         catch(...)
 568           {
 569             delete[] Buffer;
 570             throw;
 571           }
 572         delete[] Buffer;
 573       }
 574       CurLine++;
 575
 576       // Now strip comments; if the whole line is contained in a
 577       // comment, skip this line.
 578
 579       // The first meaningful character in the current fragment; will
 580       // be adjusted below as we remove bytes from the front.
 581       std::string::const_iterator Start = Input.begin();
 582       // The last meaningful character in the current fragment.
 583       std::string::const_iterator End = Input.end();
 584
 585       // Multi line comment
 586       if (InComment == true)
 587       {
 588         for (std::string::const_iterator I = Start;
 589              I != End; ++I)
 590          {
 591             if (*I == '*' && I + 1 != End && I[1] == '/')
 592             {
 593                Start = I + 2;
 594                InComment = false;
 595                break;
 596             }
 597          }
 598          if (InComment == true)
 599             continue;
 600       }
 601
 602       // Discard single line comments
 603       bool InQuote = false;
 604       for (std::string::const_iterator I = Start;
 605            I != End; ++I)
 606       {
 607          if (*I == '"')
 608             InQuote = !InQuote;
 609          if (InQuote == true)
 610             continue;
 611
 612          if ((*I == '/' && I + 1 != End && I[1] == '/') ||
 613              (*I == '#' && strcmp(string(I,I+6).c_str(),"#clear") != 0 &&
 614               strcmp(string(I,I+8).c_str(),"#include") != 0))
 615          {
 616             End = I;
 617             break;
 618          }
 619       }
 620
 621       // Look for multi line comments and build up the
 622       // fragment.
 623       Fragment.reserve(End - Start);
 624       InQuote = false;
 625       for (std::string::const_iterator I = Start;
 626            I != End; ++I)
 627       {
 628          if (*I == '"')
 629             InQuote = !InQuote;
 630          if (InQuote == true)
 631            Fragment.push_back(*I);
 632          else if (*I == '/' && I + 1 != End && I[1] == '*')
 633          {
 634             InComment = true;
 635             for (std::string::const_iterator J = I;
 636                  J != End; ++J)
 637             {
 638                if (*J == '*' && J + 1 != End && J[1] == '/')
 639                {
 640                   // Pretend we just finished walking over the
 641                   // comment, and don't add anything to the output
 642                   // fragment.
 643                   I = J + 1;
 644                   InComment = false;
 645                   break;
 646                }
 647             }
 648
 649             if (InComment == true)
 650               break;
 651          }
 652          else
 653            Fragment.push_back(*I);
 654       }
 655
 656       // Skip blank lines.
 657       if (Fragment.empty())
 658          continue;
 659
 660       // The line has actual content; interpret what it means.
 661       InQuote = false;
 662       Start = Fragment.begin();
 663       End = Fragment.end();
 664       for (std::string::const_iterator I = Start;
 665            I != End; ++I)
 666       {
 667          if (*I == '"')
 668             InQuote = !InQuote;
 669
 670          if (InQuote == false && (*I == '{' || *I == ';' || *I == '}'))
 671          {
 672             // Put the last fragment into the buffer
 673             std::string::const_iterator NonWhitespaceStart = Start;
 674             std::string::const_iterator NonWhitespaceStop = I;
 675             for (; NonWhitespaceStart != I && isspace(*NonWhitespaceStart) != 0; NonWhitespaceStart++)
 676               ;
 677             for (; NonWhitespaceStop != NonWhitespaceStart && isspace(NonWhitespaceStop[-1]) != 0; NonWhitespaceStop--)
 678               ;
 679             if (LineBuffer.empty() == false && NonWhitespaceStop - NonWhitespaceStart != 0)
 680                LineBuffer += ' ';
 681             LineBuffer += string(NonWhitespaceStart, NonWhitespaceStop);
 682
 683             // Drop this from the input string, saving the character
 684             // that terminated the construct we just closed. (i.e., a
 685             // brace or a semicolon)
 686             char TermChar = *I;
 687             Start = I + 1;
 688
 689             // Syntax Error
 690             if (TermChar == '{' && LineBuffer.empty() == true)
 691                return _error->Error(_("Syntax error %s:%u: Block starts with no name."),FName.c_str(),CurLine);
 692
 693             // No string on this line
 694             if (LineBuffer.empty() == true)
 695             {
 696                if (TermChar == '}')
 697                {
 698                   if (StackPos == 0)
 699                      ParentTag = string();
 700                   else
 701                      ParentTag = Stack[--StackPos];
 702                }
 703                continue;
 704             }
 705
 706             // Parse off the tag
 707             string Tag;
 708             const char *Pos = LineBuffer.c_str();
 709             if (ParseQuoteWord(Pos,Tag) == false)
 710                return _error->Error(_("Syntax error %s:%u: Malformed tag"),FName.c_str(),CurLine);
 711
 712             // Parse off the word
 713             string Word;
 714             bool NoWord = false;
 715             if (ParseCWord(Pos,Word) == false &&
 716                 ParseQuoteWord(Pos,Word) == false)
 717             {
 718                if (TermChar != '{')
 719                {
 720                   Word = Tag;
 721                   Tag = "";
 722                }
 723                else
 724                   NoWord = true;
 725             }
 726             if (strlen(Pos) != 0)
 727                return _error->Error(_("Syntax error %s:%u: Extra junk after value"),FName.c_str(),CurLine);
 728
 729             // Go down a level
 730             if (TermChar == '{')
 731             {
 732                if (StackPos <= 100)
 733                   Stack[StackPos++] = ParentTag;
 734
 735                /* Make sectional tags incorperate the section into the
 736                   tag string */
 737                if (AsSectional == true && Word.empty() == false)
 738                {
 739                   Tag += "::" ;
 740                   Tag += Word;
 741                   Word = "";
 742                }
 743
 744                if (ParentTag.empty() == true)
 745                   ParentTag = Tag;
 746                else
 747                   ParentTag += string("::") + Tag;
 748                Tag = string();
 749             }
 750
 751             // Generate the item name
 752             string Item;
 753             if (ParentTag.empty() == true)
 754                Item = Tag;
 755             else
 756             {
 757                if (TermChar != '{' || Tag.empty() == false)
 758                   Item = ParentTag + "::" + Tag;
 759                else
 760                   Item = ParentTag;
 761             }
 762
 763             // Specials
 764             if (Tag.length() >= 1 && Tag[0] == '#')
 765             {
 766                if (ParentTag.empty() == false)
 767                   return _error->Error(_("Syntax error %s:%u: Directives can only be done at the top level"),FName.c_str(),CurLine);
 768                Tag.erase(Tag.begin());
 769                if (Tag == "clear")
 770                   Conf.Clear(Word);
 771                else if (Tag == "include")
 772                {
 773                   if (Depth > 10)
 774                      return _error->Error(_("Syntax error %s:%u: Too many nested includes"),FName.c_str(),CurLine);
 775                   if (Word.length() > 2 && Word.end()[-1] == '/')
 776                   {
 777                      if (ReadConfigDir(Conf,Word,AsSectional,Depth+1) == false)
 778                         return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
 779                   }
 780                   else
 781                   {
 782                      if (ReadConfigFile(Conf,Word,AsSectional,Depth+1) == false)
 783                         return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
 784                   }
 785                }
 786                else
 787                   return _error->Error(_("Syntax error %s:%u: Unsupported directive '%s'"),FName.c_str(),CurLine,Tag.c_str());
 788             }
 789             else if (Tag.empty() == true && NoWord == false && Word == "#clear")
 790                return _error->Error(_("Syntax error %s:%u: clear directive requires an option tree as argument"),FName.c_str(),CurLine);
 791             else
 792             {
 793                // Set the item in the configuration class
 794                if (NoWord == false)
 795                   Conf.Set(Item,Word);
 796             }
 797
 798             // Empty the buffer
 799             LineBuffer.clear();
 800
 801             // Move up a tag, but only if there is no bit to parse
 802             if (TermChar == '}')
 803             {
 804                if (StackPos == 0)
 805                   ParentTag.clear();
 806                else
 807                   ParentTag = Stack[--StackPos];
 808             }
 809
 810          }
 811       }
 812
 813       // Store the remaining text, if any, in the current line buffer.
 814
 815       // NB: could change this to use string-based operations; I'm
 816       // using strstrip now to ensure backwards compatibility.
 817       //   -- dburrows 2008-04-01
 818       {
 819         char *Buffer = new char[End - Start + 1];
 820         try
 821           {
 822             std::copy(Start, End, Buffer);
 823             Buffer[End - Start] = '\0';
 824
 825             const char *Stripd = _strstrip(Buffer);
 826             if (*Stripd != 0 && LineBuffer.empty() == false)
 827               LineBuffer += " ";
 828             LineBuffer += Stripd;
 829           }
 830         catch(...)
 831           {
 832             delete[] Buffer;
 833             throw;
 834           }
 835         delete[] Buffer;
 836       }
 837    }
 838
 839    if (LineBuffer.empty() == false)
 840       return _error->Error(_("Syntax error %s:%u: Extra junk at end of file"),FName.c_str(),CurLine);
 841    return true;
 842 }
 843                                                                         /*}}}*/
 844 // ReadConfigDir - Read a directory of config files                     /*{{{*/
 845 // ---------------------------------------------------------------------
 846 /* */
 847 bool ReadConfigDir(Configuration &Conf,const string &Dir,
 848                    bool const &AsSectional, unsigned const &Depth)
 849 {
 850    vector<string> const List = GetListOfFilesInDir(Dir, "conf", true, true);
 851
 852    // Read the files
 853    for (vector<string>::const_iterator I = List.begin(); I != List.end(); I++)
 854       if (ReadConfigFile(Conf,*I,AsSectional,Depth) == false)
 855          return false;
 856    return true;
 857 }
 858                                                                         /*}}}*/
 859 // MatchAgainstConfig Constructor                                       /*{{{*/
 860 Configuration::MatchAgainstConfig::MatchAgainstConfig(char const * Config)
 861 {
 862    std::vector<std::string> const strings = _config->FindVector(Config);
 863    for (std::vector<std::string>::const_iterator s = strings.begin();
 864         s != strings.end(); ++s)
 865    {
 866       regex_t *p = new regex_t;
 867       if (regcomp(p, s->c_str(), REG_EXTENDED | REG_ICASE | REG_NOSUB) == 0)
 868          patterns.push_back(p);
 869       else
 870       {
 871          regfree(p);
 872          delete p;
 873          clearPatterns();
 874          _error->Warning("Regex compilation error for '%s' in configuration option '%s'",
 875                                 s->c_str(), Config);
 876          return;
 877       }
 878    }
 879    if (strings.size() == 0)
 880       patterns.push_back(NULL);
 881 }
 882                                                                         /*}}}*/
 883 // MatchAgainstConfig Destructor                                        /*{{{*/
 884 Configuration::MatchAgainstConfig::~MatchAgainstConfig()
 885 {
 886    clearPatterns();
 887 }
 888 void Configuration::MatchAgainstConfig::clearPatterns()
 889 {
 890    for(std::vector<regex_t *>::const_iterator p = patterns.begin();
 891         p != patterns.end(); ++p)
 892    {
 893       if (*p == NULL) continue;
 894       regfree(*p);
 895       delete *p;
 896    }
 897 }
 898                                                                         /*}}}*/
 899 // MatchAgainstConfig::Match - returns true if a pattern matches        /*{{{*/
 900 bool Configuration::MatchAgainstConfig::Match(char const * str) const
 901 {
 902    for(std::vector<regex_t *>::const_iterator p = patterns.begin();
 903         p != patterns.end(); ++p)
 904       if (*p != NULL && regexec(*p, str, 0, 0, 0) == 0)
 905          return true;
 906
 907    return false;
 908 }
 909                                                                         /*}}}*/