// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: configuration.cc,v 1.1 1998/07/07 04:17:10 jgg Exp $
+// $Id: configuration.cc,v 1.28 2004/04/30 04:00:15 mdz Exp $
/* ######################################################################
Configuration Class
This class provides a configuration file and command line parser
for a tree-oriented configuration environment. All runtime configuration
is stored in here.
+
+ This source is placed in the Public Domain, do with it what you will
+ It was originally written by Jason Gunthorpe <jgg@debian.org>.
##################################################################### */
/*}}}*/
// Include files /*{{{*/
#ifdef __GNUG__
-#pragma implementation "pkglib/configuration.h"
+#pragma implementation "apt-pkg/configuration.h"
#endif
-#include <pkglib/configuration.h>
-#include <strutl.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
+#include <apti18n.h>
+#include <vector>
+#include <algorithm>
+#include <fstream>
+#include <iostream>
+
#include <stdio.h>
+#include <dirent.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+using namespace std;
/*}}}*/
-Configuration *_config;
+
+Configuration *_config = new Configuration;
// Configuration::Configuration - Constructor /*{{{*/
// ---------------------------------------------------------------------
/* */
-Configuration::Configuration()
+Configuration::Configuration() : ToFree(true)
{
Root = new Item;
}
+Configuration::Configuration(const Item *Root) : Root((Item *)Root), ToFree(false)
+{
+};
+
/*}}}*/
-// Configuration::Lookup - Lookup a single item /*{{{*/
+// Configuration::~Configuration - Destructor /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+Configuration::~Configuration()
+{
+ if (ToFree == false)
+ return;
+
+ Item *Top = Root;
+ for (; Top != 0;)
+ {
+ if (Top->Child != 0)
+ {
+ Top = Top->Child;
+ continue;
+ }
+
+ while (Top != 0 && Top->Next == 0)
+ {
+ Item *Parent = Top->Parent;
+ delete Top;
+ Top = Parent;
+ }
+ if (Top != 0)
+ {
+ Item *Next = Top->Next;
+ delete Top;
+ Top = Next;
+ }
+ }
+}
+ /*}}}*/
+// Configuration::Lookup - Lookup a single item /*{{{*/
// ---------------------------------------------------------------------
/* This will lookup a single item by name below another item. It is a
helper function for the main lookup function */
int Res = 1;
Item *I = Head->Child;
Item **Last = &Head->Child;
- for (; I != 0; Last = &I->Next, I = I->Next)
- if ((Res = stringcasecmp(I->Value.begin(),I->Value.end(),S,S + Len)) == 0)
- break;
-
+
+ // Empty strings match nothing. They are used for lists.
+ if (Len != 0)
+ {
+ for (; I != 0; Last = &I->Next, I = I->Next)
+ if ((Res = stringcasecmp(I->Tag,S,S + Len)) == 0)
+ break;
+ }
+ else
+ for (; I != 0; Last = &I->Next, I = I->Next);
+
if (Res == 0)
return I;
if (Create == false)
return 0;
I = new Item;
- I->Value = string(S,Len);
+ I->Tag = string(S,Len);
I->Next = *Last;
+ I->Parent = Head;
*Last = I;
return I;
}
new items */
Configuration::Item *Configuration::Lookup(const char *Name,bool Create)
{
+ if (Name == 0)
+ return Root->Child;
+
const char *Start = Name;
const char *End = Start + strlen(Name);
const char *TagEnd = Name;
Item *Itm = Root;
- for (; End - TagEnd > 2; TagEnd++)
+ for (; End - TagEnd >= 2; TagEnd++)
{
if (TagEnd[0] == ':' && TagEnd[1] == ':')
{
}
}
+ // This must be a trailing ::, we create unique items in a list
+ if (End - Start == 0)
+ {
+ if (Create == false)
+ return 0;
+ }
+
Itm = Lookup(Itm,Start,End - Start,Create);
- if (Itm == 0)
- return 0;
return Itm;
}
/*}}}*/
// Configuration::Find - Find a value /*{{{*/
// ---------------------------------------------------------------------
/* */
-string Configuration::Find(const char *Name,const char *Default)
+string Configuration::Find(const char *Name,const char *Default) const
{
- Item *Itm = Lookup(Name,false);
+ const Item *Itm = Lookup(Name);
if (Itm == 0 || Itm->Value.empty() == true)
- return Default;
+ {
+ if (Default == 0)
+ return string();
+ else
+ return Default;
+ }
+
return Itm->Value;
}
/*}}}*/
+// Configuration::FindFile - Find a Filename /*{{{*/
+// ---------------------------------------------------------------------
+/* Directories are stored as the base dir in the Parent node and the
+ sub directory in sub nodes with the final node being the end filename
+ */
+string Configuration::FindFile(const char *Name,const char *Default) const
+{
+ const Item *Itm = Lookup(Name);
+ if (Itm == 0 || Itm->Value.empty() == true)
+ {
+ if (Default == 0)
+ return string();
+ else
+ return Default;
+ }
+
+ string val = Itm->Value;
+ while (Itm->Parent != 0 && Itm->Parent->Value.empty() == false)
+ {
+ // Absolute
+ if (val.length() >= 1 && val[0] == '/')
+ break;
+
+ // ~/foo or ./foo
+ if (val.length() >= 2 && (val[0] == '~' || val[0] == '.') && val[1] == '/')
+ break;
+
+ // ../foo
+ if (val.length() >= 3 && val[0] == '.' && val[1] == '.' && val[2] == '/')
+ break;
+
+ if (Itm->Parent->Value.end()[-1] != '/')
+ val.insert(0, "/");
+
+ val.insert(0, Itm->Parent->Value);
+ Itm = Itm->Parent;
+ }
+
+ return val;
+}
+ /*}}}*/
+// Configuration::FindDir - Find a directory name /*{{{*/
+// ---------------------------------------------------------------------
+/* This is like findfile execept the result is terminated in a / */
+string Configuration::FindDir(const char *Name,const char *Default) const
+{
+ string Res = FindFile(Name,Default);
+ if (Res.end()[-1] != '/')
+ return Res + '/';
+ return Res;
+}
+ /*}}}*/
// Configuration::FindI - Find an integer value /*{{{*/
// ---------------------------------------------------------------------
/* */
-int Configuration::FindI(const char *Name,int Default)
+int Configuration::FindI(const char *Name,int Default) const
{
- Item *Itm = Lookup(Name,false);
+ const Item *Itm = Lookup(Name);
if (Itm == 0 || Itm->Value.empty() == true)
return Default;
return Res;
}
/*}}}*/
+// Configuration::FindB - Find a boolean type /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool Configuration::FindB(const char *Name,bool Default) const
+{
+ const Item *Itm = Lookup(Name);
+ if (Itm == 0 || Itm->Value.empty() == true)
+ return Default;
+
+ return StringToBool(Itm->Value,Default);
+}
+ /*}}}*/
+// Configuration::FindAny - Find an arbitrary type /*{{{*/
+// ---------------------------------------------------------------------
+/* a key suffix of /f, /d, /b or /i calls Find{File,Dir,B,I} */
+string Configuration::FindAny(const char *Name,const char *Default) const
+{
+ string key = Name;
+ char type = 0;
+
+ if (key.size() > 2 && key.end()[-2] == '/')
+ {
+ type = key.end()[-1];
+ key.resize(key.size() - 2);
+ }
+
+ switch (type)
+ {
+ // file
+ case 'f':
+ return FindFile(key.c_str(), Default);
+
+ // directory
+ case 'd':
+ return FindDir(key.c_str(), Default);
+
+ // bool
+ case 'b':
+ return FindB(key, Default) ? "true" : "false";
+
+ // int
+ case 'i':
+ {
+ char buf[16];
+ snprintf(buf, sizeof(buf)-1, "%d", FindI(key, Default ? atoi(Default) : 0 ));
+ return buf;
+ }
+ }
+
+ // fallback
+ return Find(Name, Default);
+}
+ /*}}}*/
+// Configuration::CndSet - Conditinal Set a value /*{{{*/
+// ---------------------------------------------------------------------
+/* This will not overwrite */
+void Configuration::CndSet(const char *Name,string Value)
+{
+ Item *Itm = Lookup(Name,true);
+ if (Itm == 0)
+ return;
+ if (Itm->Value.empty() == true)
+ Itm->Value = Value;
+}
+ /*}}}*/
// Configuration::Set - Set a value /*{{{*/
// ---------------------------------------------------------------------
/* */
Itm->Value = S;
}
/*}}}*/
+// Configuration::Clear - Clear an entire tree /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Configuration::Clear(string Name)
+{
+ Item *Top = Lookup(Name.c_str(),false);
+ if (Top == 0)
+ return;
+
+ Top->Value = string();
+ Item *Stop = Top;
+ Top = Top->Child;
+ Stop->Child = 0;
+ for (; Top != 0;)
+ {
+ if (Top->Child != 0)
+ {
+ Top = Top->Child;
+ continue;
+ }
+
+ while (Top != 0 && Top->Next == 0)
+ {
+ Item *Tmp = Top;
+ Top = Top->Parent;
+ delete Tmp;
+
+ if (Top == Stop)
+ return;
+ }
+
+ Item *Tmp = Top;
+ if (Top != 0)
+ Top = Top->Next;
+ delete Tmp;
+ }
+}
+ /*}}}*/
+// Configuration::Exists - Returns true if the Name exists /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool Configuration::Exists(const char *Name) const
+{
+ const Item *Itm = Lookup(Name);
+ if (Itm == 0)
+ return false;
+ return true;
+}
+ /*}}}*/
+// Configuration::ExistsAny - Returns true if the Name, possibly /*{{{*/
+// ---------------------------------------------------------------------
+/* qualified by /[fdbi] exists */
+bool Configuration::ExistsAny(const char *Name) const
+{
+ string key = Name;
+
+ if (key.size() > 2 && key.end()[-2] == '/')
+ if (key.find_first_of("fdbi",key.size()-1) < key.size())
+ {
+ key.resize(key.size() - 2);
+ if (Exists(key.c_str()))
+ return true;
+ }
+ else
+ {
+ _error->Warning(_("Unrecognized type abbreviation: '%c'"), key.end()[-3]);
+ }
+
+ return Exists(Name);
+}
+ /*}}}*/
+// Configuration::Dump - Dump the config /*{{{*/
+// ---------------------------------------------------------------------
+/* Dump the entire configuration space */
+void Configuration::Dump(ostream& str)
+{
+ /* Write out all of the configuration directives by walking the
+ configuration tree */
+ const Configuration::Item *Top = Tree(0);
+ for (; Top != 0;)
+ {
+ str << Top->FullTag() << " \"" << Top->Value << "\";" << endl;
+
+ if (Top->Child != 0)
+ {
+ Top = Top->Child;
+ continue;
+ }
+
+ while (Top != 0 && Top->Next == 0)
+ Top = Top->Parent;
+ if (Top != 0)
+ Top = Top->Next;
+ }
+}
+ /*}}}*/
+
+// Configuration::Item::FullTag - Return the fully scoped tag /*{{{*/
+// ---------------------------------------------------------------------
+/* Stop sets an optional max recursion depth if this item is being viewed as
+ part of a sub tree. */
+string Configuration::Item::FullTag(const Item *Stop) const
+{
+ if (Parent == 0 || Parent->Parent == 0 || Parent == Stop)
+ return Tag;
+ return Parent->FullTag(Stop) + "::" + Tag;
+}
+ /*}}}*/
+
+// ReadConfigFile - Read a configuration file /*{{{*/
+// ---------------------------------------------------------------------
+/* The configuration format is very much like the named.conf format
+ used in bind8, in fact this routine can parse most named.conf files.
+ Sectional config files are like bind's named.conf where there are
+ sections like 'zone "foo.org" { .. };' This causes each section to be
+ added in with a tag like "zone::foo.org" instead of being split
+ tag/value. AsSectional enables Sectional parsing.*/
+bool ReadConfigFile(Configuration &Conf,string FName,bool AsSectional,
+ unsigned Depth)
+{
+ // Open the stream for reading
+ ifstream F(FName.c_str(),ios::in);
+ if (!F != 0)
+ return _error->Errno("ifstream::ifstream",_("Opening configuration file %s"),FName.c_str());
+
+ char Buffer[1024];
+ string LineBuffer;
+ string Stack[100];
+ unsigned int StackPos = 0;
+
+ // Parser state
+ string ParentTag;
+
+ int CurLine = 0;
+ bool InComment = false;
+ while (F.eof() == false)
+ {
+ F.getline(Buffer,sizeof(Buffer));
+ CurLine++;
+ // This should be made to work instead, but this is better than looping
+ if (F.fail() && !F.eof())
+ return _error->Error(_("Line %d too long (max %d)"), CurLine, sizeof(Buffer));
+
+ _strtabexpand(Buffer,sizeof(Buffer));
+ _strstrip(Buffer);
+
+ // Multi line comment
+ if (InComment == true)
+ {
+ for (const char *I = Buffer; *I != 0; I++)
+ {
+ if (*I == '*' && I[1] == '/')
+ {
+ memmove(Buffer,I+2,strlen(I+2) + 1);
+ InComment = false;
+ break;
+ }
+ }
+ if (InComment == true)
+ continue;
+ }
+
+ // Discard single line comments
+ bool InQuote = false;
+ for (char *I = Buffer; *I != 0; I++)
+ {
+ if (*I == '"')
+ InQuote = !InQuote;
+ if (InQuote == true)
+ continue;
+
+ if (*I == '/' && I[1] == '/')
+ {
+ *I = 0;
+ break;
+ }
+ }
+
+ // Look for multi line comments
+ InQuote = false;
+ for (char *I = Buffer; *I != 0; I++)
+ {
+ if (*I == '"')
+ InQuote = !InQuote;
+ if (InQuote == true)
+ continue;
+
+ if (*I == '/' && I[1] == '*')
+ {
+ InComment = true;
+ for (char *J = Buffer; *J != 0; J++)
+ {
+ if (*J == '*' && J[1] == '/')
+ {
+ memmove(I,J+2,strlen(J+2) + 1);
+ InComment = false;
+ break;
+ }
+ }
+
+ if (InComment == true)
+ {
+ *I = 0;
+ break;
+ }
+ }
+ }
+
+ // Blank
+ if (Buffer[0] == 0)
+ continue;
+
+ // We now have a valid line fragment
+ InQuote = false;
+ for (char *I = Buffer; *I != 0;)
+ {
+ if (*I == '"')
+ InQuote = !InQuote;
+
+ if (InQuote == false && (*I == '{' || *I == ';' || *I == '}'))
+ {
+ // Put the last fragment into the buffer
+ char *Start = Buffer;
+ char *Stop = I;
+ for (; Start != I && isspace(*Start) != 0; Start++);
+ for (; Stop != Start && isspace(Stop[-1]) != 0; Stop--);
+ if (LineBuffer.empty() == false && Stop - Start != 0)
+ LineBuffer += ' ';
+ LineBuffer += string(Start,Stop - Start);
+
+ // Remove the fragment
+ char TermChar = *I;
+ memmove(Buffer,I + 1,strlen(I + 1) + 1);
+ I = Buffer;
+
+ // Syntax Error
+ if (TermChar == '{' && LineBuffer.empty() == true)
+ return _error->Error(_("Syntax error %s:%u: Block starts with no name."),FName.c_str(),CurLine);
+
+ // No string on this line
+ if (LineBuffer.empty() == true)
+ {
+ if (TermChar == '}')
+ {
+ if (StackPos == 0)
+ ParentTag = string();
+ else
+ ParentTag = Stack[--StackPos];
+ }
+ continue;
+ }
+
+ // Parse off the tag
+ string Tag;
+ const char *Pos = LineBuffer.c_str();
+ if (ParseQuoteWord(Pos,Tag) == false)
+ return _error->Error(_("Syntax error %s:%u: Malformed tag"),FName.c_str(),CurLine);
+
+ // Parse off the word
+ string Word;
+ bool NoWord = false;
+ if (ParseCWord(Pos,Word) == false &&
+ ParseQuoteWord(Pos,Word) == false)
+ {
+ if (TermChar != '{')
+ {
+ Word = Tag;
+ Tag = "";
+ }
+ else
+ NoWord = true;
+ }
+ if (strlen(Pos) != 0)
+ return _error->Error(_("Syntax error %s:%u: Extra junk after value"),FName.c_str(),CurLine);
+
+ // Go down a level
+ if (TermChar == '{')
+ {
+ if (StackPos <= 100)
+ Stack[StackPos++] = ParentTag;
+
+ /* Make sectional tags incorperate the section into the
+ tag string */
+ if (AsSectional == true && Word.empty() == false)
+ {
+ Tag += "::" ;
+ Tag += Word;
+ Word = "";
+ }
+
+ if (ParentTag.empty() == true)
+ ParentTag = Tag;
+ else
+ ParentTag += string("::") + Tag;
+ Tag = string();
+ }
+
+ // Generate the item name
+ string Item;
+ if (ParentTag.empty() == true)
+ Item = Tag;
+ else
+ {
+ if (TermChar != '{' || Tag.empty() == false)
+ Item = ParentTag + "::" + Tag;
+ else
+ Item = ParentTag;
+ }
+
+ // Specials
+ if (Tag.length() >= 1 && Tag[0] == '#')
+ {
+ if (ParentTag.empty() == false)
+ return _error->Error(_("Syntax error %s:%u: Directives can only be done at the top level"),FName.c_str(),CurLine);
+ Tag.erase(Tag.begin());
+ if (Tag == "clear")
+ Conf.Clear(Word);
+ else if (Tag == "include")
+ {
+ if (Depth > 10)
+ return _error->Error(_("Syntax error %s:%u: Too many nested includes"),FName.c_str(),CurLine);
+ if (Word.length() > 2 && Word.end()[-1] == '/')
+ {
+ if (ReadConfigDir(Conf,Word,AsSectional,Depth+1) == false)
+ return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
+ }
+ else
+ {
+ if (ReadConfigFile(Conf,Word,AsSectional,Depth+1) == false)
+ return _error->Error(_("Syntax error %s:%u: Included from here"),FName.c_str(),CurLine);
+ }
+ }
+ else
+ return _error->Error(_("Syntax error %s:%u: Unsupported directive '%s'"),FName.c_str(),CurLine,Tag.c_str());
+ }
+ else
+ {
+ // Set the item in the configuration class
+ if (NoWord == false)
+ Conf.Set(Item,Word);
+ }
+
+ // Empty the buffer
+ LineBuffer = string();
+
+ // Move up a tag, but only if there is no bit to parse
+ if (TermChar == '}')
+ {
+ if (StackPos == 0)
+ ParentTag = string();
+ else
+ ParentTag = Stack[--StackPos];
+ }
+
+ }
+ else
+ I++;
+ }
+
+ // Store the fragment
+ const char *Stripd = _strstrip(Buffer);
+ if (*Stripd != 0 && LineBuffer.empty() == false)
+ LineBuffer += " ";
+ LineBuffer += Stripd;
+ }
+
+ if (LineBuffer.empty() == false)
+ return _error->Error(_("Syntax error %s:%u: Extra junk at end of file"),FName.c_str(),CurLine);
+ return true;
+}
+ /*}}}*/
+// ReadConfigDir - Read a directory of config files /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool ReadConfigDir(Configuration &Conf,string Dir,bool AsSectional,
+ unsigned Depth)
+{
+ DIR *D = opendir(Dir.c_str());
+ if (D == 0)
+ return _error->Errno("opendir",_("Unable to read %s"),Dir.c_str());
+
+ vector<string> List;
+
+ for (struct dirent *Ent = readdir(D); Ent != 0; Ent = readdir(D))
+ {
+ if (Ent->d_name[0] == '.')
+ continue;
+
+ // Skip bad file names ala run-parts
+ const char *C = Ent->d_name;
+ for (; *C != 0; C++)
+ if (isalpha(*C) == 0 && isdigit(*C) == 0 && *C != '_' && *C != '-')
+ break;
+ if (*C != 0)
+ continue;
+
+ // Make sure it is a file and not something else
+ string File = flCombine(Dir,Ent->d_name);
+ struct stat St;
+ if (stat(File.c_str(),&St) != 0 || S_ISREG(St.st_mode) == 0)
+ continue;
+
+ List.push_back(File);
+ }
+ closedir(D);
+
+ sort(List.begin(),List.end());
+
+ // Read the files
+ for (vector<string>::const_iterator I = List.begin(); I != List.end(); I++)
+ if (ReadConfigFile(Conf,*I,AsSectional,Depth) == false)
+ return false;
+ return true;
+}
+ /*}}}*/
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