cmdline/apt-helper.cc

   1 // -*- mode: cpp; mode: fold -*-
   2 // Description                                                          /*{{{*/
   3 /* #####################################################################
   4    apt-helper - cmdline helpers
   5    ##################################################################### */
   6                                                                         /*}}}*/
   7 // Include Files                                                        /*{{{*/
   8 #include <config.h>
   9
  10 #include <apt-pkg/configuration.h>
  11 #include <apt-pkg/cmndline.h>
  12 #include <apt-pkg/error.h>
  13 #include <apt-pkg/init.h>
  14 #include <apt-pkg/strutl.h>
  15 #include <apt-pkg/pkgsystem.h>
  16 #include <apt-pkg/fileutl.h>
  17 #include <apt-pkg/acquire.h>
  18 #include <apt-pkg/acquire-item.h>
  19 #include <apt-pkg/proxy.h>
  20
  21 #include <apt-private/acqprogress.h>
  22 #include <apt-private/private-output.h>
  23 #include <apt-private/private-download.h>
  24 #include <apt-private/private-cmndline.h>
  25 #include <apt-private/private-main.h>
  26 #include <apt-pkg/srvrec.h>
  27
  28 #include <iostream>
  29 #include <string>
  30 #include <vector>
  31
  32 #include <stdlib.h>
  33
  34 #include <apti18n.h>
  35                                                                         /*}}}*/
  36
  37 static bool DoAutoDetectProxy(CommandLine &CmdL)                        /*{{{*/
  38 {
  39    if (CmdL.FileSize() != 2)
  40       return _error->Error(_("Need one URL as argument"));
  41    URI ServerURL(CmdL.FileList[1]);
  42    AutoDetectProxy(ServerURL);
  43    std::string SpecificProxy = _config->Find("Acquire::"+ServerURL.Access+"::Proxy::" + ServerURL.Host);
  44    ioprintf(std::cout, "Using proxy '%s' for URL '%s'\n",
  45             SpecificProxy.c_str(), std::string(ServerURL).c_str());
  46
  47    return true;
  48 }
  49                                                                         /*}}}*/
  50 static bool DoDownloadFile(CommandLine &CmdL)                           /*{{{*/
  51 {
  52    if (CmdL.FileSize() <= 2)
  53       return _error->Error(_("Must specify at least one pair url/filename"));
  54
  55    aptAcquireWithTextStatus Fetcher;
  56    size_t fileind = 0;
  57    std::vector<std::string> targetfiles;
  58    while (fileind + 2 <= CmdL.FileSize())
  59    {
  60       std::string download_uri = CmdL.FileList[fileind + 1];
  61       std::string targetfile = CmdL.FileList[fileind + 2];
  62       std::string hash;
  63       if (CmdL.FileSize() > fileind + 3)
  64          hash = CmdL.FileList[fileind + 3];
  65       // we use download_uri as descr and targetfile as short-descr
  66       new pkgAcqFile(&Fetcher, download_uri, hash, 0, download_uri, targetfile,
  67             "dest-dir-ignored", targetfile);
  68       targetfiles.push_back(targetfile);
  69       fileind += 3;
  70    }
  71
  72    bool Failed = false;
  73    if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
  74       return _error->Error(_("Download Failed"));
  75    if (targetfiles.empty() == false)
  76       for (std::vector<std::string>::const_iterator f = targetfiles.begin(); f != targetfiles.end(); ++f)
  77          if (FileExists(*f) == false)
  78             return _error->Error(_("Download Failed"));
  79
  80    return true;
  81 }
  82                                                                         /*}}}*/
  83 static bool DoSrvLookup(CommandLine &CmdL)                              /*{{{*/
  84 {
  85    if (CmdL.FileSize() <= 1)
  86       return _error->Error("Must specify at least one SRV record");
  87
  88    for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
  89    {
  90       std::vector<SrvRec> srv_records;
  91       std::string const name = CmdL.FileList[i];
  92       c0out << "# Target\tPriority\tWeight\tPort # for " << name << std::endl;
  93       size_t const found = name.find(":");
  94       if (found != std::string::npos)
  95       {
  96          std::string const host = name.substr(0, found);
  97          size_t const port = atoi(name.c_str() + found + 1);
  98          if(GetSrvRecords(host, port, srv_records) == false)
  99             _error->Error(_("GetSrvRec failed for %s"), name.c_str());
 100       }
 101       else if(GetSrvRecords(name, srv_records) == false)
 102          _error->Error(_("GetSrvRec failed for %s"), name.c_str());
 103
 104       for (SrvRec const &I : srv_records)
 105          c1out << I.target << "\t" << I.priority << "\t" << I.weight << "\t" << I.port << std::endl;
 106    }
 107    return true;
 108 }
 109                                                                         /*}}}*/
 110 static const APT::Configuration::Compressor *FindCompressor(std::vector<APT::Configuration::Compressor> const & compressors, std::string name)                          /*{{{*/
 111 {
 112    APT::Configuration::Compressor const * compressor = NULL;
 113    for (auto const & c : compressors)
 114    {
 115       if (compressor != NULL && c.Cost >= compressor->Cost)
 116          continue;
 117       if (c.Name == name || c.Extension == name || (!c.Extension.empty() && c.Extension.substr(1) == name))
 118          compressor = &c;
 119    }
 120
 121    return compressor;
 122 }
 123                                                                         /*}}}*/
 124 static bool DoCatFile(CommandLine &CmdL)                                /*{{{*/
 125 {
 126    FileFd fd;
 127    FileFd out;
 128    std::string const compressorName = _config->Find("Apt-Helper::Cat-File::Compress", "");
 129
 130    if (compressorName.empty() == false)
 131    {
 132
 133       auto const compressors = APT::Configuration::getCompressors();
 134       auto const compressor = FindCompressor(compressors, compressorName);
 135
 136       if (compressor == NULL)
 137          return _error->Error("Could not find compressor: %s", compressorName.c_str());
 138
 139       if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, *compressor) == false)
 140          return false;
 141    } else
 142    {
 143       if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly) == false)
 144          return false;
 145    }
 146
 147    if (CmdL.FileSize() <= 1)
 148    {
 149       if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
 150          return false;
 151       if (CopyFile(fd, out) == false)
 152          return false;
 153       return true;
 154    }
 155
 156    for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
 157    {
 158       std::string const name = CmdL.FileList[i];
 159
 160       if (name != "-")
 161       {
 162          if (fd.Open(name, FileFd::ReadOnly, FileFd::Extension) == false)
 163             return false;
 164       }
 165       else
 166       {
 167          if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
 168             return false;
 169       }
 170
 171       if (CopyFile(fd, out) == false)
 172          return false;
 173    }
 174    return true;
 175 }
 176                                                                         /*}}}*/
 177 static bool ShowHelp(CommandLine &)                                     /*{{{*/
 178 {
 179    std::cout <<
 180       _("Usage: apt-helper [options] command\n"
 181             "       apt-helper [options] cat-file file ...\n"
 182             "       apt-helper [options] download-file uri target-path\n"
 183             "\n"
 184             "apt-helper bundles a variety of commands for shell scripts to use\n"
 185             "e.g. the same proxy configuration or acquire system as APT would.\n");
 186    return true;
 187 }
 188                                                                         /*}}}*/
 189 static std::vector<aptDispatchWithHelp> GetCommands()                   /*{{{*/
 190 {
 191    return {
 192       {"download-file", &DoDownloadFile, _("download the given uri to the target-path")},
 193       {"srv-lookup", &DoSrvLookup, _("lookup a SRV record (e.g. _http._tcp.ftp.debian.org)")},
 194       {"cat-file", &DoCatFile, _("concatenate files, with automatic decompression")},
 195       {"auto-detect-proxy", &DoAutoDetectProxy, _("detect proxy using apt.conf")},
 196       {nullptr, nullptr, nullptr}
 197    };
 198 }
 199                                                                         /*}}}*/
 200 int main(int argc,const char *argv[])                                   /*{{{*/
 201 {
 202    InitLocale();
 203
 204    CommandLine CmdL;
 205    auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_HELPER, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
 206
 207    InitOutput();
 208
 209    return DispatchCommandLine(CmdL, Cmds);
 210 }
 211                                                                         /*}}}*/