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// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
// $Id: apt-extracttemplates.cc,v 1.15 2003/07/26 00:00:11 mdz Exp $
/* ######################################################################
APT Extract Templates - Program to extract debconf config and template
files
This is a simple program to extract config and template information
from Debian packages. It can be used to speed up the preconfiguration
process for debconf-enabled packages
##################################################################### */
/*}}}*/
// Include Files /*{{{*/
#include <apt-pkg/init.h>
#include <apt-pkg/cmndline.h>
#include <apt-pkg/pkgcache.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/progress.h>
#include <apt-pkg/sourcelist.h>
#include <apt-pkg/pkgcachegen.h>
#include <apt-pkg/version.h>
#include <apt-pkg/tagfile.h>
#include <apt-pkg/extracttar.h>
#include <apt-pkg/arfile.h>
#include <apt-pkg/deblistparser.h>
#include <apt-pkg/error.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/fileutl.h>
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
#include <unistd.h>
#include <fstream>
#include <locale.h>
#include <config.h>
#include <apti18n.h>
#include "apt-extracttemplates.h"
/*}}}*/
using namespace std;
#define TMPDIR "/tmp"
pkgCache *DebFile::Cache = 0;
// DebFile::DebFile - Construct the DebFile object /*{{{*/
// ---------------------------------------------------------------------
/* */
DebFile::DebFile(const char *debfile)
: File(debfile, FileFd::ReadOnly), Control(0), DepOp(0),
PreDepOp(0), Config(0), Template(0), Which(None)
{
}
/*}}}*/
// DebFile::~DebFile - Destruct the DebFile object /*{{{*/
// ---------------------------------------------------------------------
/* */
DebFile::~DebFile()
{
delete [] Control;
delete [] Config;
delete [] Template;
}
/*}}}*/
// DebFile::GetInstalledVer - Find out the installed version of a pkg /*{{{*/
// ---------------------------------------------------------------------
/* */
string DebFile::GetInstalledVer(const string &package)
{
pkgCache::PkgIterator Pkg = Cache->FindPkg(package);
if (Pkg.end() == false)
{
pkgCache::VerIterator V = Pkg.CurrentVer();
if (V.end() == false)
{
return V.VerStr();
}
}
return string();
}
/*}}}*/
// DebFile::Go - Start extracting a debian package /*{{{*/
// ---------------------------------------------------------------------
/* */
bool DebFile::Go()
{
ARArchive AR(File);
if (_error->PendingError() == true)
return false;
const ARArchive::Member *Member = AR.FindMember("control.tar.gz");
if (Member == 0)
return _error->Error(_("%s not a valid DEB package."),File.Name().c_str());
if (File.Seek(Member->Start) == false)
return false;
ExtractTar Tar(File, Member->Size,"gzip");
return Tar.Go(*this);
}
/*}}}*/
// DebFile::DoItem examine element in package and mark /*{{{*/
// ---------------------------------------------------------------------
/* */
bool DebFile::DoItem(Item &I, int &Fd)
{
if (strcmp(I.Name, "control") == 0)
{
delete [] Control;
Control = new char[I.Size+1];
Control[I.Size] = 0;
Which = IsControl;
ControlLen = I.Size;
// make it call the Process method below. this is so evil
Fd = -2;
}
else if (strcmp(I.Name, "config") == 0)
{
delete [] Config;
Config = new char[I.Size+1];
Config[I.Size] = 0;
Which = IsConfig;
Fd = -2;
}
else if (strcmp(I.Name, "templates") == 0)
{
delete [] Template;
Template = new char[I.Size+1];
Template[I.Size] = 0;
Which = IsTemplate;
Fd = -2;
}
else
{
// Ignore it
Fd = -1;
}
return true;
}
/*}}}*/
// DebFile::Process examine element in package and copy /*{{{*/
// ---------------------------------------------------------------------
/* */
bool DebFile::Process(Item &I, const unsigned char *data,
unsigned long size, unsigned long pos)
{
switch (Which)
{
case IsControl:
memcpy(Control + pos, data, size);
break;
case IsConfig:
memcpy(Config + pos, data, size);
break;
case IsTemplate:
memcpy(Template + pos, data, size);
break;
default: /* throw it away */ ;
}
return true;
}
/*}}}*/
// DebFile::ParseInfo - Parse control file for dependency info /*{{{*/
// ---------------------------------------------------------------------
/* */
bool DebFile::ParseInfo()
{
if (Control == NULL) return false;
pkgTagSection Section;
Section.Scan(Control, ControlLen);
Package = Section.FindS("Package");
Version = GetInstalledVer(Package);
const char *Start, *Stop;
if (Section.Find("Depends", Start, Stop) == true)
{
while (1)
{
string P, V;
unsigned int Op;
Start = debListParser::ParseDepends(Start, Stop, P, V, Op);
if (Start == 0) return false;
if (P == "debconf")
{
DepVer = V;
DepOp = Op;
break;
}
if (Start == Stop) break;
}
}
if (Section.Find("Pre-Depends", Start, Stop) == true)
{
while (1)
{
string P, V;
unsigned int Op;
Start = debListParser::ParseDepends(Start, Stop, P, V, Op);
if (Start == 0) return false;
if (P == "debconf")
{
PreDepVer = V;
PreDepOp = Op;
break;
}
if (Start == Stop) break;
}
}
return true;
}
/*}}}*/
// ShowHelp - show a short help text /*{{{*/
// ---------------------------------------------------------------------
/* */
int ShowHelp(void)
{
ioprintf(cout,_("%s %s for %s %s compiled on %s %s\n"),PACKAGE,VERSION,
COMMON_OS,COMMON_CPU,__DATE__,__TIME__);
if (_config->FindB("version") == true)
return 0;
cout <<
_("Usage: apt-extracttemplates file1 [file2 ...]\n"
"\n"
"apt-extracttemplates is a tool to extract config and template info\n"
"from debian packages\n"
"\n"
"Options:\n"
" -h This help text\n"
" -t Set the temp dir\n"
" -c=? Read this configuration file\n"
" -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n");
return 0;
}
/*}}}*/
// WriteFile - write the contents of the passed string to a file /*{{{*/
// ---------------------------------------------------------------------
/* */
string WriteFile(const char *package, const char *prefix, const char *data)
{
char fn[512];
static int i;
char *tempdir = NULL;
tempdir = getenv("TMPDIR");
if (tempdir == NULL)
tempdir = TMPDIR;
snprintf(fn, sizeof(fn), "%s/%s.%s.%u%d",
_config->Find("APT::ExtractTemplates::TempDir", tempdir).c_str(),
package, prefix, getpid(), i++);
FileFd f;
if (data == NULL)
data = "";
if (!f.Open(fn, FileFd::WriteTemp, 0600))
{
_error->Errno("ofstream::ofstream",_("Unable to write to %s"),fn);
return string();
}
f.Write(data, strlen(data));
f.Close();
return fn;
}
/*}}}*/
// WriteConfig - write out the config data from a debian package file /*{{{*/
// ---------------------------------------------------------------------
/* */
void WriteConfig(const DebFile &file)
{
string templatefile = WriteFile(file.Package.c_str(), "template", file.Template);
string configscript = WriteFile(file.Package.c_str(), "config", file.Config);
if (templatefile.empty() == true || configscript.empty() == true)
return;
cout << file.Package << " " << file.Version << " "
<< templatefile << " " << configscript << endl;
}
/*}}}*/
// InitCache - initialize the package cache /*{{{*/
// ---------------------------------------------------------------------
/* */
bool Go(CommandLine &CmdL)
{
// Initialize the apt cache
MMap *Map = 0;
pkgSourceList List;
List.ReadMainList();
OpProgress Prog;
pkgMakeStatusCache(List,Prog,&Map,true);
if (Map == 0)
return false;
DebFile::Cache = new pkgCache(Map);
if (_error->PendingError() == true)
return false;
// Find out what version of debconf is currently installed
string debconfver = DebFile::GetInstalledVer("debconf");
if (debconfver.empty() == true)
return _error->Error( _("Cannot get debconf version. Is debconf installed?"));
// Process each package passsed in
for (unsigned int I = 0; I != CmdL.FileSize(); I++)
{
// Will pick up the errors later..
DebFile file(CmdL.FileList[I]);
if (file.Go() == false)
{
_error->Error("Prior errors apply to %s",CmdL.FileList[I]);
continue;
}
// Does the package have templates?
if (file.Template != 0 && file.ParseInfo() == true)
{
// Check to make sure debconf dependencies are
// satisfied
// cout << "Check " << file.DepVer << ',' << debconfver << endl;
if (file.DepVer != "" &&
DebFile::Cache->VS->CheckDep(debconfver.c_str(),
file.DepOp,file.DepVer.c_str()
) == false)
continue;
if (file.PreDepVer != "" &&
DebFile::Cache->VS->CheckDep(debconfver.c_str(),
file.PreDepOp,file.PreDepVer.c_str()
) == false)
continue;
WriteConfig(file);
}
}
delete Map;
delete DebFile::Cache;
return !_error->PendingError();
}
/*}}}*/
int main(int argc, const char **argv)
{
CommandLine::Args Args[] = {
{'h',"help","help",0},
{'v',"version","version",0},
{'t',"tempdir","APT::ExtractTemplates::TempDir",CommandLine::HasArg},
{'c',"config-file",0,CommandLine::ConfigFile},
{'o',"option",0,CommandLine::ArbItem},
{0,0,0,0}};
// Set up gettext support
setlocale(LC_ALL,"");
textdomain(PACKAGE);
// Parse the command line and initialize the package library
CommandLine CmdL(Args,_config);
if (pkgInitConfig(*_config) == false ||
CmdL.Parse(argc,argv) == false ||
pkgInitSystem(*_config,_system) == false)
{
_error->DumpErrors();
return 100;
}
// See if the help should be shown
if (_config->FindB("help") == true ||
CmdL.FileSize() == 0)
return ShowHelp();
Go(CmdL);
// Print any errors or warnings found during operation
if (_error->empty() == false)
{
// This goes to stderr..
bool Errors = _error->PendingError();
_error->DumpErrors();
return Errors == true?100:0;
}
return 0;
}
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