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 #ifdef __GNUG__
  19 #pragma implementation "apt-pkg/configuration.h"
  20 #endif
  21 #include <apt-pkg/configuration.h>
  22 #include <apt-pkg/error.h>
  23 #include <apt-pkg/strutl.h>
  24 #include <apt-pkg/fileutl.h>
  25 #include <apti18n.h>
  26
  27 #include <vector>
  28 #include <algorithm>
  29 #include <fstream>
  30 #include <iostream>
  31
  32 #include <stdio.h>
  33 #include <dirent.h>
  34 #include <sys/stat.h>
  35 #include <unistd.h>
  36
  37 using namespace std;
  38                                                                         /*}}}*/
  39
  40 Configuration *_config = new Configuration;
  41
  42 // Configuration::Configuration - Constructor                           /*{{{*/
  43 // ---------------------------------------------------------------------
  44 /* */
  45 Configuration::Configuration() : ToFree(true)
  46 {
  47    Root = new Item;
  48 }
  49 Configuration::Configuration(const Item *Root) : Root((Item *)Root), ToFree(false)
  50 {
  51 };
  52
  53                                                                         /*}}}*/
  54 // Configuration::~Configuration - Destructor                           /*{{{*/
  55 // ---------------------------------------------------------------------
  56 /* */
  57 Configuration::~Configuration()
  58 {
  59    if (ToFree == false)
  60       return;
  61
  62    Item *Top = Root;
  63    for (; Top != 0;)
  64    {
  65       if (Top->Child != 0)
  66       {
  67          Top = Top->Child;
  68          continue;
  69       }
  70
  71       while (Top != 0 && Top->Next == 0)
  72       {
  73          Item *Parent = Top->Parent;
  74          delete Top;
  75          Top = Parent;
  76       }
  77       if (Top != 0)
  78       {
  79          Item *Next = Top->Next;
  80          delete Top;
  81          Top = Next;
  82       }
  83    }
  84 }
  85                                                                         /*}}}*/
  86 // Configuration::Lookup - Lookup a single item                         /*{{{*/
  87 // ---------------------------------------------------------------------
  88 /* This will lookup a single item by name below another item. It is a
  89    helper function for the main lookup function */
  90 Configuration::Item *Configuration::Lookup(Item *Head,const char *S,
  91                                            unsigned long Len,bool Create)
  92 {
  93    int Res = 1;
  94    Item *I = Head->Child;
  95    Item **Last = &Head->Child;
  96
  97    // Empty strings match nothing. They are used for lists.
  98    if (Len != 0)
  99    {
 100       for (; I != 0; Last = &I->Next, I = I->Next)
 101          if ((Res = stringcasecmp(I->Tag,S,S + Len)) == 0)
 102             break;
 103    }
 104    else
 105       for (; I != 0; Last = &I->Next, I = I->Next);
 106
 107    if (Res == 0)
 108       return I;
 109    if (Create == false)
 110       return 0;
 111
 112    I = new Item;
 113    I->Tag.assign(S,Len);
 114    I->Next = *Last;
 115    I->Parent = Head;
 116    *Last = I;
 117    return I;
 118 }
 119                                                                         /*}}}*/
 120 // Configuration::Lookup - Lookup a fully scoped item                   /*{{{*/
 121 // ---------------------------------------------------------------------
 122 /* This performs a fully scoped lookup of a given name, possibly creating
 123    new items */
 124 Configuration::Item *Configuration::Lookup(const char *Name,bool Create)
 125 {
 126    if (Name == 0)
 127       return Root->Child;
 128
 129    const char *Start = Name;
 130    const char *End = Start + strlen(Name);
 131    const char *TagEnd = Name;
 132    Item *Itm = Root;
 133    for (; End - TagEnd >= 2; TagEnd++)
 134    {
 135       if (TagEnd[0] == ':' && TagEnd[1] == ':')
 136       {
 137          Itm = Lookup(Itm,Start,TagEnd - Start,Create);
 138          if (Itm == 0)
 139             return 0;
 140          TagEnd = Start = TagEnd + 2;
 141       }
 142    }
 143
 144    // This must be a trailing ::, we create unique items in a list
 145    if (End - Start == 0)
 146    {
 147       if (Create == false)
 148          return 0;
 149    }
 150
 151    Itm = Lookup(Itm,Start,End - Start,Create);
 152    return Itm;
 153 }
 154                                                                         /*}}}*/
 155 // Configuration::Find - Find a value                                   /*{{{*/
 156 // ---------------------------------------------------------------------
 157 /* */
 158 string Configuration::Find(const char *Name,const char *Default) const
 159 {
 160    const Item *Itm = Lookup(Name);
 161    if (Itm == 0 || Itm->Value.empty() == true)
 162    {
 163       if (Default == 0)
 164          return "";
 165       else
 166          return Default;
 167    }
 168
 169    return Itm->Value;
 170 }
 171                                                                         /*}}}*/
 172 // Configuration::FindFile - Find a Filename                            /*{{{*/
 173 // ---------------------------------------------------------------------
 174 /* Directories are stored as the base dir in the Parent node and the
 175    sub directory in sub nodes with the final node being the end filename
 176  */
 177 string Configuration::FindFile(const char *Name,const char *Default) const
 178 {
 179    const Item *Itm = Lookup(Name);
 180    if (Itm == 0 || Itm->Value.empty() == true)
 181    {
 182       if (Default == 0)
 183          return "";
 184       else
 185          return Default;
 186    }
 187
 188    string val = Itm->Value;
 189    while (Itm->Parent != 0 && Itm->Parent->Value.empty() == false)
 190    {
 191       // Absolute
 192       if (val.length() >= 1 && val[0] == '/')
 193          break;
 194
 195       // ~/foo or ./foo
 196       if (val.length() >= 2 && (val[0] == '~' || val[0] == '.') && val[1] == '/')
 197          break;
 198
 199       // ../foo
 200       if (val.length() >= 3 && val[0] == '.' && val[1] == '.' && val[2] == '/')
 201          break;
 202
 203       if (Itm->Parent->Value.end()[-1] != '/')
 204          val.insert(0, "/");
 205
 206       val.insert(0, Itm->Parent->Value);
 207       Itm = Itm->Parent;
 208    }
 209
 210    return val;
 211 }
 212                                                                         /*}}}*/
 213 // Configuration::FindDir - Find a directory name                       /*{{{*/
 214 // ---------------------------------------------------------------------
 215 /* This is like findfile execept the result is terminated in a / */
 216 string Configuration::FindDir(const char *Name,const char *Default) const
 217 {
 218    string Res = FindFile(Name,Default);
 219    if (Res.end()[-1] != '/')
 220       return Res + '/';
 221    return Res;
 222 }
 223                                                                         /*}}}*/
 224 // Configuration::FindI - Find an integer value                         /*{{{*/
 225 // ---------------------------------------------------------------------
 226 /* */
 227 int Configuration::FindI(const char *Name,int Default) const
 228 {
 229    const Item *Itm = Lookup(Name);
 230    if (Itm == 0 || Itm->Value.empty() == true)
 231       return Default;
 232
 233    char *End;
 234    int Res = strtol(Itm->Value.c_str(),&End,0);
 235    if (End == Itm->Value.c_str())
 236       return Default;
 237
 238    return Res;
 239 }
 240                                                                         /*}}}*/
 241 // Configuration::FindB - Find a boolean type                           /*{{{*/
 242 // ---------------------------------------------------------------------
 243 /* */
 244 bool Configuration::FindB(const char *Name,bool Default) const
 245 {
 246    const Item *Itm = Lookup(Name);
 247    if (Itm == 0 || Itm->Value.empty() == true)
 248       return Default;
 249
 250    return StringToBool(Itm->Value,Default);
 251 }
 252                                                                         /*}}}*/
 253 // Configuration::FindAny - Find an arbitrary type                      /*{{{*/
 254 // ---------------------------------------------------------------------
 255 /* a key suffix of /f, /d, /b or /i calls Find{File,Dir,B,I} */
 256 string Configuration::FindAny(const char *Name,const char *Default) const
 257 {
 258    string key = Name;
 259    char type = 0;
 260
 261    if (key.size() > 2 && key.end()[-2] == '/')
 262    {
 263       type = key.end()[-1];
 264       key.resize(key.size() - 2);
 265    }
 266
 267    switch (type)
 268    {
 269       // file
 270       case 'f':
 271       return FindFile(key.c_str(), Default);
 272
 273       // directory
 274       case 'd':
 275       return FindDir(key.c_str(), Default);
 276
 277       // bool
 278       case 'b':
 279       return FindB(key, Default) ? "true" : "false";
 280
 281       // int
 282       case 'i':
 283       {
 284          char buf[16];
 285          snprintf(buf, sizeof(buf)-1, "%d", FindI(key, Default ? atoi(Default) : 0 ));
 286          return buf;
 287       }
 288    }
 289
 290    // fallback
 291    return Find(Name, Default);
 292 }
 293                                                                         /*}}}*/
 294 // Configuration::CndSet - Conditinal Set a value                       /*{{{*/
 295 // ---------------------------------------------------------------------
 296 /* This will not overwrite */
 297 void Configuration::CndSet(const char *Name,const string &Value)
 298 {
 299    Item *Itm = Lookup(Name,true);
 300    if (Itm == 0)
 301       return;
 302    if (Itm->Value.empty() == true)
 303       Itm->Value = Value;
 304 }
 305                                                                         /*}}}*/
 306 // Configuration::Set - Set a value                                     /*{{{*/
 307 // ---------------------------------------------------------------------
 308 /* */
 309 void Configuration::Set(const char *Name,const string &Value)
 310 {
 311    Item *Itm = Lookup(Name,true);
 312    if (Itm == 0)
 313       return;
 314    Itm->Value = Value;
 315 }
 316                                                                         /*}}}*/
 317 // Configuration::Set - Set an integer value                            /*{{{*/
 318 // ---------------------------------------------------------------------
 319 /* */
 320 void Configuration::Set(const char *Name,int Value)
 321 {
 322    Item *Itm = Lookup(Name,true);
 323    if (Itm == 0)
 324       return;
 325    char S[300];
 326    snprintf(S,sizeof(S),"%i",Value);
 327    Itm->Value = S;
 328 }
 329                                                                         /*}}}*/
 330 // Configuration::Clear - Clear an single value from a list             /*{{{*/
 331 // ---------------------------------------------------------------------
 332 /* */
 333 void Configuration::Clear(const string Name, int Value)
 334 {
 335    char S[300];
 336    snprintf(S,sizeof(S),"%i",Value);
 337    Clear(Name, S);
 338 }
 339                                                                         /*}}}*/
 340 // Configuration::Clear - Clear an single value from a list             /*{{{*/
 341 // ---------------------------------------------------------------------
 342 /* */
 343 void Configuration::Clear(const string Name, string Value)
 344 {
 345    Item *Top = Lookup(Name.c_str(),false);
 346    if (Top == 0 || Top->Child == 0)
 347       return;
 348
 349    Item *Tmp, *Prev, *I;
 350    Prev = I = Top->Child;
 351
 352    while(I != NULL)
 353    {
 354       if(I->Value == Value)
 355       {
 356          Tmp = I;
 357          // was first element, point parent to new first element
 358          if(Top->Child == Tmp)
 359             Top->Child = I->Next;
 360          I = I->Next;
 361          Prev->Next = I;
 362          delete Tmp;
 363       } else {
 364          Prev = I;
 365          I = I->Next;
 366       }
 367    }
 368
 369 }
 370                                                                         /*}}}*/
 371 // Configuration::Clear - Clear an entire tree                          /*{{{*/
 372 // ---------------------------------------------------------------------
 373 /* */
 374 void Configuration::Clear(string Name)
 375 {
 376    Item *Top = Lookup(Name.c_str(),false);
 377    if (Top == 0)
 378       return;
 379
 380    Top->Value.clear();
 381    Item *Stop = Top;
 382    Top = Top->Child;
 383    Stop->Child = 0;
 384    for (; Top != 0;)
 385    {
 386       if (Top->Child != 0)
 387       {
 388          Top = Top->Child;
 389          continue;
 390       }
 391
 392       while (Top != 0 && Top->Next == 0)
 393       {
 394          Item *Tmp = Top;
 395          Top = Top->Parent;
 396          delete Tmp;
 397
 398          if (Top == Stop)
 399             return;
 400       }
 401
 402       Item *Tmp = Top;
 403       if (Top != 0)
 404          Top = Top->Next;
 405       delete Tmp;
 406    }
 407 }
 408                                                                         /*}}}*/
 409 // Configuration::Exists - Returns true if the Name exists              /*{{{*/
 410 // ---------------------------------------------------------------------
 411 /* */
 412 bool Configuration::Exists(const char *Name) const
 413 {
 414    const Item *Itm = Lookup(Name);
 415    if (Itm == 0)
 416       return false;
 417    return true;
 418 }
 419                                                                         /*}}}*/
 420 // Configuration::ExistsAny - Returns true if the Name, possibly        /*{{{*/
 421 // ---------------------------------------------------------------------
 422 /* qualified by /[fdbi] exists */
 423 bool Configuration::ExistsAny(const char *Name) const
 424 {
 425    string key = Name;
 426
 427    if (key.size() > 2 && key.end()[-2] == '/')
 428       if (key.find_first_of("fdbi",key.size()-1) < key.size())
 429       {
 430          key.resize(key.size() - 2);
 431          if (Exists(key.c_str()))
 432             return true;
 433       }
 434       else
 435       {
 436          _error->Warning(_("Unrecognized type abbreviation: '%c'"), key.end()[-3]);
 437       }
 438
 439    return Exists(Name);
 440 }
 441                                                                         /*}}}*/
 442 // Configuration::Dump - Dump the config                                /*{{{*/
 443 // ---------------------------------------------------------------------
 444 /* Dump the entire configuration space */
 445 void Configuration::Dump(ostream& str)
 446 {
 447    /* Write out all of the configuration directives by walking the
 448       configuration tree */
 449    const Configuration::Item *Top = Tree(0);
 450    for (; Top != 0;)
 451    {
 452       str << Top->FullTag() << " \"" << Top->Value << "\";" << endl;
 453
 454       if (Top->Child != 0)
 455       {
 456          Top = Top->Child;
 457          continue;
 458       }
 459
 460       while (Top != 0 && Top->Next == 0)
 461          Top = Top->Parent;
 462       if (Top != 0)
 463          Top = Top->Next;
 464    }
 465 }
 466                                                                         /*}}}*/
 467
 468 // Configuration::Item::FullTag - Return the fully scoped tag           /*{{{*/
 469 // ---------------------------------------------------------------------
 470 /* Stop sets an optional max recursion depth if this item is being viewed as
 471    part of a sub tree. */
 472 string Configuration::Item::FullTag(const Item *Stop) const
 473 {
 474    if (Parent == 0 || Parent->Parent == 0 || Parent == Stop)
 475       return Tag;
 476    return Parent->FullTag(Stop) + "::" + Tag;
 477 }
 478                                                                         /*}}}*/
 479
 480 // ReadConfigFile - Read a configuration file                           /*{{{*/
 481 // ---------------------------------------------------------------------
 482 /* The configuration format is very much like the named.conf format
 483    used in bind8, in fact this routine can parse most named.conf files.
 484    Sectional config files are like bind's named.conf where there are
 485    sections like 'zone "foo.org" { .. };' This causes each section to be
 486    added in with a tag like "zone::foo.org" instead of being split
 487    tag/value. AsSectional enables Sectional parsing.*/
 488 bool ReadConfigFile(Configuration &Conf,const string &FName,bool AsSectional,
 489                     unsigned Depth)
 490 {
 491    // Open the stream for reading
 492    ifstream F(FName.c_str(),ios::in);
 493    if (!F != 0)
 494       return _error->Errno("ifstream::ifstream",_("Opening configuration file %s"),FName.c_str());
 495
 496    char Buffer[1024];
 497    string LineBuffer;
 498    string Stack[100];
 499    unsigned int StackPos = 0;
 500
 501    // Parser state
 502    string ParentTag;
 503
 504    int CurLine = 0;
 505    bool InComment = false;
 506    while (F.eof() == false)
 507    {
 508       F.getline(Buffer,sizeof(Buffer));
 509       CurLine++;
 510       // This should be made to work instead, but this is better than looping
 511       if (F.fail() && !F.eof())
 512          return _error->Error(_("Line %d too long (max %d)"), CurLine, sizeof(Buffer));
 513
 514       _strtabexpand(Buffer,sizeof(Buffer));
 515       _strstrip(Buffer);
 516
 517       // Multi line comment
 518       if (InComment == true)
 519       {
 520          for (const char *I = Buffer; *I != 0; I++)
 521          {
 522             if (*I == '*' && I[1] == '/')
 523             {
 524                memmove(Buffer,I+2,strlen(I+2) + 1);
 525                InComment = false;
 526                break;
 527             }
 528          }
 529          if (InComment == true)
 530             continue;
 531       }
 532
 533       // Discard single line comments
 534       bool InQuote = false;
 535       for (char *I = Buffer; *I != 0; I++)
 536       {
 537          if (*I == '"')
 538             InQuote = !InQuote;
 539          if (InQuote == true)
 540             continue;
 541
 542          if (*I == '/' && I[1] == '/')
 543          {
 544             *I = 0;
 545             break;
 546          }
 547       }
 548
 549       // Look for multi line comments
 550       InQuote = false;
 551       for (char *I = Buffer; *I != 0; I++)
 552       {
 553          if (*I == '"')
 554             InQuote = !InQuote;
 555          if (InQuote == true)
 556             continue;
 557
 558          if (*I == '/' && I[1] == '*')
 559          {
 560             InComment = true;
 561             for (char *J = Buffer; *J != 0; J++)
 562             {
 563                if (*J == '*' && J[1] == '/')
 564                {
 565                   memmove(I,J+2,strlen(J+2) + 1);
 566                   InComment = false;
 567                   break;
 568                }
 569             }
 570
 571             if (InComment == true)
 572             {
 573                *I = 0;
 574                break;
 575             }
 576          }
 577       }
 578
 579       // Blank
 580       if (Buffer[0] == 0)
 581          continue;
 582
 583       // We now have a valid line fragment
 584       InQuote = false;
 585       for (char *I = Buffer; *I != 0;)
 586       {
 587          if (*I == '"')
 588             InQuote = !InQuote;
 589
 590          if (InQuote == false && (*I == '{' || *I == ';' || *I == '}'))
 591          {
 592             // Put the last fragment into the buffer
 593             char *Start = Buffer;
 594             char *Stop = I;
 595             for (; Start != I && isspace(*Start) != 0; Start++);
 596             for (; Stop != Start && isspace(Stop[-1]) != 0; Stop--);
 597             if (LineBuffer.empty() == false && Stop - Start != 0)
 598                LineBuffer += ' ';
 599             LineBuffer += string(Start,Stop - Start);
 600
 601             // Remove the fragment
 602             char TermChar = *I;
 603             memmove(Buffer,I + 1,strlen(I + 1) + 1);
 604             I = Buffer;
 605
 606             // Syntax Error
 607             if (TermChar == '{' && LineBuffer.empty() == true)
 608                return _error->Error(_("Syntax error %s:%u: Block starts with no name."),FName.c_str(),CurLine);
 609
 610             // No string on this line
 611             if (LineBuffer.empty() == true)
 612             {
 613                if (TermChar == '}')
 614                {
 615                   if (StackPos == 0)
 616                      ParentTag = string();
 617                   else
 618                      ParentTag = Stack[--StackPos];
 619                }
 620                continue;
 621             }
 622
 623             // Parse off the tag
 624             string Tag;
 625             const char *Pos = LineBuffer.c_str();
 626             if (ParseQuoteWord(Pos,Tag) == false)
 627                return _error->Error(_("Syntax error %s:%u: Malformed tag"),FName.c_str(),CurLine);
 628
 629             // Parse off the word
 630             string Word;
 631             bool NoWord = false;
 632             if (ParseCWord(Pos,Word) == false &&
 633                 ParseQuoteWord(Pos,Word) == false)
 634             {
 635                if (TermChar != '{')
 636                {
 637                   Word = Tag;
 638                   Tag = "";
 639                }
 640                else
 641                   NoWord = true;
 642             }
 643             if (strlen(Pos) != 0)
 644                return _error->Error(_("Syntax error %s:%u: Extra junk after value"),FName.c_str(),CurLine);
 645
 646             // Go down a level
 647             if (TermChar == '{')
 648             {
 649                if (StackPos <= 100)
 650                   Stack[StackPos++] = ParentTag;
 651
 652                /* Make sectional tags incorperate the section into the
 653                   tag string */
 654                if (AsSectional == true && Word.empty() == false)
 655                {
 656                   Tag += "::" ;
 657                   Tag += Word;
 658                   Word = "";
 659                }
 660
 661                if (ParentTag.empty() == true)
 662                   ParentTag = Tag;
 663                else
 664                   ParentTag += string("::") + Tag;
 665                Tag = string();
 666             }
 667
 668             // Generate the item name
 669             string Item;
 670             if (ParentTag.empty() == true)
 671                Item = Tag;
 672             else
 673             {
 674                if (TermChar != '{' || Tag.empty() == false)
 675                   Item = ParentTag + "::" + Tag;
 676                else
 677                   Item = ParentTag;
 678             }
 679
 680             // Specials
 681             if (Tag.length() >= 1 && Tag[0] == '#')
 682             {
 683                if (ParentTag.empty() == false)
 684                   return _error->Error(_("Syntax error %s:%u: Directives can only be done at the top level"),FName.c_str(),CurLine);
 685                Tag.erase(Tag.begin());
 686                if (Tag == "clear")
 687                   Conf.Clear(Word);
 688                else if (Tag == "include")
 689                {
 690                   if (Depth > 10)
 691                      return _error->Error(_("Syntax error %s:%u: Too many nested includes"),FName.c_str(),CurLine);
 692                   if (Word.length() > 2 && Word.end()[-1] == '/')
 693                   {
 694                      if (ReadConfigDir(Conf,Word,AsSectional,Depth+1) == false)
 695                         return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
 696                   }
 697                   else
 698                   {
 699                      if (ReadConfigFile(Conf,Word,AsSectional,Depth+1) == false)
 700                         return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
 701                   }
 702                }
 703                else
 704                   return _error->Error(_("Syntax error %s:%u: Unsupported directive '%s'"),FName.c_str(),CurLine,Tag.c_str());
 705             }
 706             else
 707             {
 708                // Set the item in the configuration class
 709                if (NoWord == false)
 710                   Conf.Set(Item,Word);
 711             }
 712
 713             // Empty the buffer
 714             LineBuffer.clear();
 715
 716             // Move up a tag, but only if there is no bit to parse
 717             if (TermChar == '}')
 718             {
 719                if (StackPos == 0)
 720                   ParentTag.clear();
 721                else
 722                   ParentTag = Stack[--StackPos];
 723             }
 724
 725          }
 726          else
 727             I++;
 728       }
 729
 730       // Store the fragment
 731       const char *Stripd = _strstrip(Buffer);
 732       if (*Stripd != 0 && LineBuffer.empty() == false)
 733          LineBuffer += " ";
 734       LineBuffer += Stripd;
 735    }
 736
 737    if (LineBuffer.empty() == false)
 738       return _error->Error(_("Syntax error %s:%u: Extra junk at end of file"),FName.c_str(),CurLine);
 739    return true;
 740 }
 741                                                                         /*}}}*/
 742 // ReadConfigDir - Read a directory of config files                     /*{{{*/
 743 // ---------------------------------------------------------------------
 744 /* */
 745 bool ReadConfigDir(Configuration &Conf,const string &Dir,bool AsSectional,
 746                    unsigned Depth)
 747 {
 748    DIR *D = opendir(Dir.c_str());
 749    if (D == 0)
 750       return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
 751
 752    vector<string> List;
 753
 754    for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D))
 755    {
 756       if (Ent->d_name[0] == '.')
 757          continue;
 758
 759       // Skip bad file names ala run-parts
 760       const char *C = Ent->d_name;
 761       for (; *C != 0; C++)
 762          if (isalpha(*C) == 0 && isdigit(*C) == 0 && *C != '_' && *C != '-')
 763             break;
 764       if (*C != 0)
 765          continue;
 766
 767       // Make sure it is a file and not something else
 768       string File = flCombine(Dir,Ent->d_name);
 769       struct stat St;
 770       if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0)
 771          continue;
 772
 773       List.push_back(File);
 774    }
 775    closedir(D);
 776
 777    sort(List.begin(),List.end());
 778
 779    // Read the files
 780    for (vector<string>::const_iterator I = List.begin(); I != List.end(); I++)
 781       if (ReadConfigFile(Conf,*I,AsSectional,Depth) == false)
 782          return false;
 783    return true;
 784 }
 785                                                                         /*}}}*/