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Most interfaces (Maemo) need a high-level name :/.
[apt.git] / cmdline / apt-extracttemplates.cc
diff --git a/cmdline/apt-extracttemplates.cc b/cmdline/apt-extracttemplates.cc
index b7af0300586d46491d2afb50e13121b198142701..a4468b9893eb7016ca7d7fa637a6e7d4b7fd4c70 100644 (file)
--- a/cmdline/apt-extracttemplates.cc
+++ b/cmdline/apt-extracttemplates.cc
@@ -1,142 +1,349 @@
-#include <stdio.h>
-#include <string.h>
-#include <stdlib.h>
-#include <unistd.h>
-#define _GNU_SOURCE
-#include <getopt.h>
-#include <wait.h>
-#include <fstream.h>
+// -*- 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<config.h>
 
 #include <apt-pkg/init.h>
 
 #include <apt-pkg/init.h>
-#if APT_PKG_MAJOR >= 3
-#define APT_COMPATIBILITY 986
-#include <apt-pkg/debversion.h>
-#endif
+#include <apt-pkg/cmndline.h>
 #include <apt-pkg/pkgcache.h>
 #include <apt-pkg/pkgcache.h>
+#include <apt-pkg/cacheiterators.h>
 #include <apt-pkg/configuration.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/sourcelist.h>
 #include <apt-pkg/pkgcachegen.h>
 #include <apt-pkg/version.h>
-#include "debfile.h"
-       
-#define TMPDIR "/var/lib/debconf/"
-#define STR(x) (x ? x : "")
-//#define TMPDIR "tmp/"
+#include <apt-pkg/tagfile.h>
+#include <apt-pkg/debfile.h>
+#include <apt-pkg/deblistparser.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/dirstream.h>
+#include <apt-pkg/mmap.h>
 
 
-void help(void)
-{
-       fprintf(stderr, "apt-extracttemplates deb [deb]\n");
-       exit(0);
-}
+#include <apt-private/private-cmndline.h>
+#include <apt-private/private-main.h>
 
 
-char *writefile(const char *prefix, const char *data)
-{
-       char fn[512];
-       static int i;
-       snprintf(fn, sizeof(fn), "%s%s.%u%d", TMPDIR, prefix, getpid(), i++);
+#include <iostream>
+#include <stdio.h>
+#include <string.h>
+#include <unistd.h>
+#include <stdlib.h>
 
 
-       if (data == NULL) data = "";
+#include "apt-extracttemplates.h"
 
 
-       ofstream ofs(fn);
-       if (!ofs) return NULL;
-       ofs << data;
-       ofs.close();
-       return strdup(fn);
+#include <apti18n.h>
+                                                                       /*}}}*/
+
+using namespace std;
+
+pkgCache *DebFile::Cache = 0;
+
+// DebFile::DebFile - Construct the DebFile object                     /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+DebFile::DebFile(const char *debfile)
+       : File(debfile, FileFd::ReadOnly), Control(NULL), ControlLen(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();
+               }
+       }
 
 
-void writeconfig(const DebFile &file)
+       return string();
+}
+                                                                       /*}}}*/
+// DebFile::Go - Start extracting a debian package                     /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool DebFile::Go()
 {
 {
-       char *templatefile = writefile("template", file.Template);
-       char *configscript = writefile("config", file.Config);
+       debDebFile Deb(File);
 
 
-       if (templatefile == 0 || configscript == 0)
+       return Deb.ExtractTarMember(*this, "control.tar");
+}
+                                                                       /*}}}*/
+// DebFile::DoItem examine element in package and mark                 /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool DebFile::DoItem(Item &I, int &Fd)
+{
+       if (strcmp(I.Name, "control") == 0)
        {
        {
-               fprintf(stderr, "Cannot write config script or templates\n");
-               return;
+               delete [] Control;
+               Control = new char[I.Size+3];
+               Control[I.Size] = '\n';
+               Control[I.Size + 1] = '\n';
+               Control[I.Size + 2] = '\0';
+               Which = IsControl;
+               ControlLen = I.Size + 3;
+               // make it call the Process method below. this is so evil
+               Fd = -2;
        }
        }
-       printf("%s %s %s %s\n",
-               STR(file.Package),      // Package
-               STR(file.Version),      // Version
-               templatefile,   // Template
-               configscript    // Config
-       );
+       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;
 }
 }
-
-void init(MMap *&Map, pkgCache *&Cache)
+                                                                       /*}}}*/
+// DebFile::Process examine element in package and copy                        /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool DebFile::Process(Item &/*I*/, const unsigned char *data,
+               unsigned long long size, unsigned long long pos)
 {
 {
-       // Initialize the apt cache
-       if (pkgInitConfig(*_config) == false || pkgInitSystem(*_config, _system) == false)
+       switch (Which)
        {
        {
-               fprintf(stderr, "Cannot initialize apt cache\n");
-               return;
+       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 */ ;
        }
        }
-       pkgSourceList List;
-       List.ReadMainList();
-       OpProgress Prog;
-       pkgMakeStatusCache(List,Prog,&Map,true);
-       Cache = new pkgCache(Map);
+       return true;
 }
 }
-
-int main(int argc, char **argv, char **env)
+                                                                       /*}}}*/
+// DebFile::ParseInfo - Parse control file for dependency info         /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool DebFile::ParseInfo()
 {
 {
-       int idx = 0;
-       char **debs = 0;
-       int numdebs = 0;
-       MMap *Map = 0;
-       const char *debconfver = NULL;
+       if (Control == NULL) return false;
+
+       pkgTagSection Section;
+       if (Section.Scan(Control, ControlLen) == false)
+               return false;
 
 
-       init(Map, DebFile::Cache);
-       if (Map == 0 || DebFile::Cache == 0)
+       Package = Section.FindS("Package");
+       Version = GetInstalledVer(Package);
+
+       const char *Start, *Stop;
+       if (Section.Find("Depends", Start, Stop) == true)
        {
        {
-               fprintf(stderr, "Cannot initialize APT cache\n");
-               return 1;
+               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;
+               }
        }
        }
-
-       debconfver = DebFile::GetInstalledVer("debconf");
        
        
-       if (debconfver == NULL) 
+       if (Section.Find("Pre-Depends", Start, Stop) == true)
        {
        {
-               fprintf(stderr, "Cannot get debconf version. Is debconf installed?\n");
-               return 1;
+               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;
+}
+                                                                       /*}}}*/
+static bool ShowHelp(CommandLine &)                                    /*{{{*/
+{
+       cout <<
+               _("Usage: apt-extracttemplates file1 [file2 ...]\n"
+               "\n"
+               "apt-extracttemplates is used to extract config and template files\n"
+               "from debian packages. It is used mainly by debconf(1) to prompt for\n"
+               "configuration questions before installation of packages.\n");
+       return true;
+}
+                                                                       /*}}}*/
+// WriteFile - write the contents of the passed string to a file       /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+static string WriteFile(const char *package, const char *prefix, const char *data)
+{
+       char fn[512];
 
 
-       numdebs = argc - 1;
-       debs = new char *[numdebs];
-       memcpy(debs, &argv[1], sizeof(char *) * numdebs);
-
-       if (numdebs < 1) 
+        std::string tempdir = GetTempDir();
+       snprintf(fn, sizeof(fn), "%s/%s.%s.XXXXXX",
+                 _config->Find("APT::ExtractTemplates::TempDir", 
+                               tempdir.c_str()).c_str(),
+                 package, prefix);
+       FileFd f;
+       if (data == NULL)
+               data = "";
+        int fd = mkstemp(fn);
+        if (fd < 0) {
+               _error->Errno("ofstream::ofstream",_("Unable to mkstemp %s"),fn);
+                return string();
+        }
+       if (!f.OpenDescriptor(fd, FileFd::WriteOnly, FileFd::None, true))
        {
        {
-               fprintf(stderr, "apt-extracttemplates foo.deb [...]\n");
-               return 0;
+               _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  /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+static 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                            /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+static bool Go(CommandLine &CmdL)
+{      
+       // Initialize the apt cache
+       MMap *Map = 0;
+       pkgSourceList List;
+       List.ReadMainList();
+       pkgCacheGenerator::MakeStatusCache(List,NULL,&Map,true);
+       if (Map == 0)
+          return false;
+       DebFile::Cache = new pkgCache(Map);
+       if (_error->PendingError() == true)
+               return false;
 
 
-       for (idx = 0; idx < numdebs; idx++)
+       // 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++)
        {
        {
-               DebFile file(debs[idx]);
-               if (file.Go() == false) 
+               // Will pick up the errors later..
+               DebFile file(CmdL.FileList[I]);
+               if (file.Go() == false)
                {
                {
-                       fprintf(stderr, "Cannot read %s\n", debs[idx]);
+                       _error->Error("Prior errors apply to %s",CmdL.FileList[I]);
                        continue;
                }
                        continue;
                }
+
+               // Does the package have templates?
                if (file.Template != 0 && file.ParseInfo() == true)
                {
                if (file.Template != 0 && file.ParseInfo() == true)
                {
-                       if (file.DepVer != 0 && *file.DepVer != 0 &&
-                           pkgCheckDep(file.DepVer, 
-                                       debconfver, file.DepOp) == false) 
+                       // 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;
                                continue;
-                       if (file.PreDepVer != 0 && *file.PreDepVer != 0 &&
-                           pkgCheckDep(file.PreDepVer, 
-                                       debconfver, file.PreDepOp) == false) 
+                       if (file.PreDepVer != "" &&
+                           DebFile::Cache->VS->CheckDep(debconfver.c_str(),
+                                       file.PreDepOp,file.PreDepVer.c_str()
+                                                        ) == false) 
                                continue;
 
                                continue;
 
-                       writeconfig(file);
+                       WriteConfig(file);
                }
        }
        
 
        delete Map;
        delete DebFile::Cache;
                }
        }
        
 
        delete Map;
        delete DebFile::Cache;
+       
+       return !_error->PendingError();
+}
+                                                                       /*}}}*/
+static std::vector<aptDispatchWithHelp> GetCommands()                  /*{{{*/
+{
+   return {
+       {nullptr, nullptr, nullptr}
+   };
+}
+                                                                       /*}}}*/
+int main(int argc, const char **argv)                                  /*{{{*/
+{
+       CommandLine CmdL;
+       auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_EXTRACTTEMPLATES, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
+
+       Go(CmdL);
 
 
-       return 0;
+       return DispatchCommandLine(CmdL, {});
 }
 }
+                                                                       /*}}}*/
APT (for Cydia)