if file is inaccessible for _apt, disable privilege drop in acquire

[apt.git] / cmdline / apt-cdrom.cc

// -*- mode: cpp; mode: fold -*-
// Description								/*{{{*/
// $Id: apt-cdrom.cc,v 1.45 2003/11/19 23:50:51 mdz Exp $
/* ######################################################################
   
   APT CDROM - Tool for handling APT's CDROM database.
   
   Currently the only option is 'add' which will take the current CD
   in the drive and add it into the database.
   
   ##################################################################### */
									/*}}}*/
// Include Files							/*{{{*/
#include<config.h>

#include <apt-pkg/cmndline.h>
#include <apt-pkg/error.h>
#include <apt-pkg/init.h>
#include <apt-pkg/fileutl.h>
#include <apt-pkg/progress.h>
#include <apt-pkg/cdromutl.h>
#include <apt-pkg/strutl.h>
#include <apt-pkg/cdrom.h>
#include <apt-pkg/configuration.h>
#include <apt-pkg/pkgsystem.h>

#include <iostream>
#include <vector>
#include <string>
#include <sys/stat.h>
#include <unistd.h>

#include <apt-private/private-cmndline.h>
#include <apt-private/private-output.h>

#include <apti18n.h>
									/*}}}*/

using namespace std;

class pkgCdromTextStatus : public pkgCdromStatus			/*{{{*/
{
protected:
   OpTextProgress Progress;
   void Prompt(const char *Text);
   string PromptLine(const char *Text);
   bool AskCdromName(string &name) APT_OVERRIDE;

public:
   virtual void Update(string text, int current) APT_OVERRIDE;
   virtual bool ChangeCdrom() APT_OVERRIDE;
   virtual OpProgress* GetOpProgress() APT_OVERRIDE;
};

void pkgCdromTextStatus::Prompt(const char *Text)
{
   char C;
   cout << Text << ' ' << flush;
   if (read(STDIN_FILENO,&C,1) < 0)
      _error->Errno("pkgCdromTextStatus::Prompt",
                    "Failed to read from standard input (not a terminal?)");
   if (C != '\n')
      cout << endl;
}

string pkgCdromTextStatus::PromptLine(const char *Text)
{
   cout << Text << ':' << endl;

   string Res;
   getline(cin,Res);
   return Res;
}

bool pkgCdromTextStatus::AskCdromName(string &name)
{
   cout << _("Please provide a name for this Disc, such as 'Debian 5.0.3 Disk 1'") << flush;
   name = PromptLine("");

   return true;
}


void pkgCdromTextStatus::Update(string text, int /*current*/)
{
   if(text.size() > 0)
      cout << text << flush;
}

bool pkgCdromTextStatus::ChangeCdrom()
{
   Prompt(_("Please insert a Disc in the drive and press [Enter]"));
   return true;
}

APT_CONST OpProgress* pkgCdromTextStatus::GetOpProgress()
{
   return &Progress;
}
									/*}}}*/
// AddOrIdent - Add or Ident a CDROM					/*{{{*/
static bool AddOrIdent(bool const Add)
{
   pkgUdevCdromDevices UdevCdroms;
   pkgCdromTextStatus log;
   pkgCdrom cdrom;

   bool oneSuccessful = false;
   bool AutoDetect = _config->FindB("Acquire::cdrom::AutoDetect", true);
   if (AutoDetect == true && UdevCdroms.Dlopen() == true)
   {
      bool const Debug = _config->FindB("Debug::Acquire::cdrom", false);
      std::string const CDMount = _config->Find("Acquire::cdrom::mount");
      bool const NoMount = _config->FindB("APT::CDROM::NoMount", false);
      if (NoMount == false)
	 _config->Set("APT::CDROM::NoMount", true);

      vector<struct CdromDevice> const v = UdevCdroms.Scan();
      for (std::vector<struct CdromDevice>::const_iterator cd = v.begin(); cd != v.end(); ++cd)
      {
	 if (Debug)
	    clog << "Looking at device:"
	       << "\tDeviveName: '" << cd->DeviceName << "'"
	       << "\tIsMounted: '" << cd->Mounted << "'"
	       << "\tMountPoint: '" << cd->MountPath << "'"
	       << endl;

	 std::string AptMountPoint;
	 if (cd->Mounted)
	    _config->Set("Acquire::cdrom::mount", cd->MountPath);
	 else if (NoMount == true)
	    continue;
	 else
	 {
	    AptMountPoint = _config->FindDir("Dir::Media::MountPath");
	    if (FileExists(AptMountPoint) == false)
	       mkdir(AptMountPoint.c_str(), 0750);
	    if(MountCdrom(AptMountPoint, cd->DeviceName) == false)
	    {
	       _error->Warning(_("Failed to mount '%s' to '%s'"), cd->DeviceName.c_str(), AptMountPoint.c_str());
	       continue;
	    }
	    _config->Set("Acquire::cdrom::mount", AptMountPoint);
	 }

	 _error->PushToStack();
	 if (Add == true)
	    oneSuccessful = cdrom.Add(&log);
	 else
	 {
	    std::string id;
	    oneSuccessful = cdrom.Ident(id, &log);
	 }
	 _error->MergeWithStack();

	 if (AptMountPoint.empty() == false)
	    UnmountCdrom(AptMountPoint);
      }
      if (NoMount == false)
	 _config->Set("APT::CDROM::NoMount", NoMount);
      _config->Set("Acquire::cdrom::mount", CDMount);
   }

   // fallback if auto-detect didn't work
   if (oneSuccessful == false)
   {
      _error->PushToStack();
      if (Add == true)
	 oneSuccessful = cdrom.Add(&log);
      else
      {
	 std::string id;
	 oneSuccessful = cdrom.Ident(id, &log);
      }
      _error->MergeWithStack();
   }

   if (oneSuccessful == false)
      _error->Error("%s", _("No CD-ROM could be auto-detected or found using the default mount point.\n"
      "You may try the --cdrom option to set the CD-ROM mount point.\n"
      "See 'man apt-cdrom' for more information about the CD-ROM auto-detection and mount point."));
   else if (Add == true)
      cout << _("Repeat this process for the rest of the CDs in your set.") << endl;

   return oneSuccessful;
}
									/*}}}*/
// DoAdd - Add a new CDROM						/*{{{*/
// ---------------------------------------------------------------------
/* This does the main add bit.. We show some status and things. The
   sequence is to mount/umount the CD, Ident it then scan it for package
   files and reduce that list. Then we copy over the package files and
   verify them. Then rewrite the database files */
static bool DoAdd(CommandLine &)
{
   return AddOrIdent(true);
}
									/*}}}*/
// DoIdent - Ident a CDROM						/*{{{*/
static bool DoIdent(CommandLine &)
{
   return AddOrIdent(false);
}
									/*}}}*/
// ShowHelp - Show the help screen					/*{{{*/
static bool ShowHelp(CommandLine &)
{
   ioprintf(cout, "%s %s (%s)\n", PACKAGE, PACKAGE_VERSION, COMMON_ARCH);

   if (_config->FindB("version") == true)
      return true;
   
   cout << 
      "Usage: apt-cdrom [options] command\n"
      "\n"
      "apt-cdrom is a tool to add CDROM's to APT's source list. The\n"
      "CDROM mount point and device information is taken from apt.conf\n"
      "and /etc/fstab.\n"
      "\n"
      "Commands:\n"
      "   add - Add a CDROM\n"
      "   ident - Report the identity of a CDROM\n"
      "\n"
      "Options:\n"
      "  -h   This help text\n"
      "  -d   CD-ROM mount point\n"
      "  -r   Rename a recognized CD-ROM\n"
      "  -m   No mounting\n"
      "  -f   Fast mode, don't check package files\n"
      "  -a   Thorough scan mode\n"
      "  --no-auto-detect Do not try to auto detect drive and mount point\n"
      "  -c=? Read this configuration file\n"
      "  -o=? Set an arbitrary configuration option, eg -o dir::cache=/tmp\n"
      "See fstab(5)\n";
   return true;
}
									/*}}}*/
int main(int argc,const char *argv[])					/*{{{*/
{
   CommandLine::Dispatch Cmds[] = {
      {"add",&DoAdd},
      {"ident",&DoIdent},
      {"help",&ShowHelp},
      {0,0}};

   std::vector<CommandLine::Args> Args = getCommandArgs("apt-cdrom", CommandLine::GetCommand(Cmds, argc, argv));

   // Set up gettext support
   setlocale(LC_ALL,"");
   textdomain(PACKAGE);

   // Parse the command line and initialize the package library
   CommandLine CmdL;
   ParseCommandLine(CmdL, Cmds, Args.data(), &_config, &_system, argc, argv, ShowHelp);

   InitOutput();

   // Match the operation
   bool returned = CmdL.DispatchArg(Cmds);

   if (_config->FindI("quiet",0) > 0)
      _error->DumpErrors();
   else
      _error->DumpErrors(GlobalError::DEBUG);
   return returned == true ? 0 : 100;
}
									/*}}}*/