Adding upstream version 2.2.4.upstream/2.2.4upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 334 insertions, 0 deletions

diff --git a/cmdline/apt-helper.cc b/cmdline/apt-helper.cc
new file mode 100644
index 0000000..85795e0
--- /dev/null
+++ b/cmdline/apt-helper.cc
@@ -0,0 +1,334 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+/* #####################################################################
+   apt-helper - cmdline helpers
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#include <config.h>
+
+#include <apt-pkg/acquire-item.h>
+#include <apt-pkg/acquire.h>
+#include <apt-pkg/cmndline.h>
+#include <apt-pkg/cachefilter-patterns.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+#include <apt-pkg/init.h>
+#include <apt-pkg/pkgsystem.h>
+#include <apt-pkg/proxy.h>
+#include <apt-pkg/strutl.h>
+
+#include <apt-pkg/srvrec.h>
+#include <apt-private/acqprogress.h>
+#include <apt-private/private-cmndline.h>
+#include <apt-private/private-download.h>
+#include <apt-private/private-main.h>
+#include <apt-private/private-output.h>
+
+#include <iostream>
+#include <string>
+#include <vector>
+
+#include <stdlib.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+
+#include <apti18n.h>
+									/*}}}*/
+
+static bool DoAutoDetectProxy(CommandLine &CmdL)			/*{{{*/
+{
+   if (CmdL.FileSize() != 2)
+      return _error->Error(_("Need one URL as argument"));
+   URI ServerURL(CmdL.FileList[1]);
+   if (AutoDetectProxy(ServerURL) == false)
+      return false;
+   std::string SpecificProxy = _config->Find("Acquire::"+ServerURL.Access+"::Proxy::" + ServerURL.Host);
+   ioprintf(std::cout, "Using proxy '%s' for URL '%s'\n",
+            SpecificProxy.c_str(), std::string(ServerURL).c_str());
+
+   return true;
+}
+									/*}}}*/
+static bool DoDownloadFile(CommandLine &CmdL)				/*{{{*/
+{
+   if (CmdL.FileSize() <= 2)
+      return _error->Error(_("Must specify at least one pair url/filename"));
+
+   aptAcquireWithTextStatus Fetcher;
+   size_t fileind = 0;
+   std::vector<std::string> targetfiles;
+   while (fileind + 2 <= CmdL.FileSize())
+   {
+      std::string download_uri = CmdL.FileList[fileind + 1];
+      std::string targetfile = CmdL.FileList[fileind + 2];
+      HashStringList hashes;
+
+      fileind += 2;
+
+      // An empty string counts as a hash for compatibility reasons
+      if (CmdL.FileSize() > fileind + 1 && *CmdL.FileList[fileind + 1] == '\0')
+	 fileind++;
+
+      /* Let's start looking for hashes */
+      for (auto i = fileind + 1; CmdL.FileSize() > i; i++)
+      {
+	 bool isAHash = false;
+
+	 for (auto HashP = HashString::SupportedHashes(); *HashP != nullptr; HashP++)
+	 {
+	    if (APT::String::Startswith(CmdL.FileList[i], *HashP))
+	       isAHash = true;
+	 }
+
+	 if (!isAHash)
+	    break;
+
+	 hashes.push_back(HashString(CmdL.FileList[i]));
+	 fileind++;
+      }
+
+      // we use download_uri as descr and targetfile as short-descr
+      new pkgAcqFile(&Fetcher, download_uri, hashes, 0, download_uri, targetfile,
+		     "dest-dir-ignored", targetfile);
+      targetfiles.push_back(targetfile);
+   }
+
+   bool Failed = false;
+   if (AcquireRun(Fetcher, 0, &Failed, NULL) == false || Failed == true)
+      return _error->Error(_("Download Failed"));
+   if (targetfiles.empty() == false)
+      for (std::vector<std::string>::const_iterator f = targetfiles.begin(); f != targetfiles.end(); ++f)
+	 if (FileExists(*f) == false)
+	    return _error->Error(_("Download Failed"));
+
+   return true;
+}
+									/*}}}*/
+static bool DoSrvLookup(CommandLine &CmdL)				/*{{{*/
+{
+   if (CmdL.FileSize() <= 1)
+      return _error->Error("Must specify at least one SRV record");
+
+   for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
+   {
+      std::vector<SrvRec> srv_records;
+      std::string const name = CmdL.FileList[i];
+      c0out << "# Target\tPriority\tWeight\tPort # for " << name << std::endl;
+      size_t const found = name.find(":");
+      if (found != std::string::npos)
+      {
+	 std::string const host = name.substr(0, found);
+	 size_t const port = atoi(name.c_str() + found + 1);
+	 if(GetSrvRecords(host, port, srv_records) == false)
+	    _error->Error(_("GetSrvRec failed for %s"), name.c_str());
+      }
+      else if(GetSrvRecords(name, srv_records) == false)
+	 _error->Error(_("GetSrvRec failed for %s"), name.c_str());
+
+      for (SrvRec const &I : srv_records)
+	 ioprintf(c1out, "%s\t%d\t%d\t%d\n", I.target.c_str(), I.priority, I.weight, I.port);
+   }
+   return true;
+}
+									/*}}}*/
+static const APT::Configuration::Compressor *FindCompressor(std::vector<APT::Configuration::Compressor> const &compressors, std::string const &name) /*{{{*/
+{
+   APT::Configuration::Compressor const * compressor = NULL;
+   for (auto const & c : compressors)
+   {
+      if (compressor != NULL && c.Cost >= compressor->Cost)
+         continue;
+      if (c.Name == name || c.Extension == name || (!c.Extension.empty() && c.Extension.substr(1) == name))
+         compressor = &c;
+   }
+
+   return compressor;
+}
+									/*}}}*/
+static bool DoCatFile(CommandLine &CmdL)				/*{{{*/
+{
+   FileFd fd;
+   FileFd out;
+   std::string const compressorName = _config->Find("Apt-Helper::Cat-File::Compress", "");
+
+   if (compressorName.empty() == false)
+   {
+
+      auto const compressors = APT::Configuration::getCompressors();
+      auto const compressor = FindCompressor(compressors, compressorName);
+
+      if (compressor == NULL)
+         return _error->Error("Could not find compressor: %s", compressorName.c_str());
+
+      if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly, *compressor) == false)
+         return false;
+   } else
+   {
+      if (out.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly) == false)
+         return false;
+   }
+
+   if (CmdL.FileSize() <= 1)
+   {
+      if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
+	 return false;
+      if (CopyFile(fd, out) == false)
+         return false;
+      return true;
+   }
+
+   for(size_t i = 1; CmdL.FileList[i] != NULL; ++i)
+   {
+      std::string const name = CmdL.FileList[i];
+
+      if (name != "-")
+      {
+	 if (fd.Open(name, FileFd::ReadOnly, FileFd::Extension) == false)
+	    return false;
+      }
+      else
+      {
+	 if (fd.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
+	    return false;
+      }
+
+      if (CopyFile(fd, out) == false)
+         return false;
+   }
+   return true;
+}
+									/*}}}*/
+
+static pid_t ExecuteProcess(const char *Args[])				/*{{{*/
+{
+   pid_t pid = ExecFork();
+   if (pid == 0)
+   {
+      execvp(Args[0], (char **)Args);
+      _exit(100);
+   }
+   return pid;
+}
+
+static bool ServiceIsActive(const char *service)
+{
+   const char *argv[] = {"systemctl", "is-active", "-q", service, nullptr};
+   pid_t pid = ExecuteProcess(argv);
+   return ExecWait(pid, "systemctl is-active", true);
+}
+
+static bool DoWaitOnline(CommandLine &)
+{
+   // Also add services to After= in .service
+   static const char *WaitingTasks[][6] = {
+       {"systemd-networkd.service", "/lib/systemd/systemd-networkd-wait-online", "-q", "--timeout=30", nullptr},
+       {"NetworkManager.service", "nm-online", "-q", "--timeout", "30", nullptr},
+       {"connman.service", "connmand-wait-online", "--timeout=30", nullptr},
+   };
+
+   for (const char **task : WaitingTasks)
+   {
+      if (ServiceIsActive(task[0]))
+      {
+	 pid_t pid = ExecuteProcess(task + 1);
+
+	 ExecWait(pid, task[1]);
+      }
+   }
+
+   return _error->PendingError() == false;
+}
+									/*}}}*/
+static bool DropPrivsAndRun(CommandLine &CmdL)				/*{{{*/
+{
+   if (CmdL.FileSize() < 2)
+      return _error->Error("No command given to run without privileges");
+   if (DropPrivileges() == false)
+      return _error->Error("Dropping Privileges failed, not executing '%s'", CmdL.FileList[1]);
+
+   std::vector<char const *> Args;
+   Args.reserve(CmdL.FileSize() + 1);
+   for (auto a = CmdL.FileList + 1; *a != nullptr; ++a)
+      Args.push_back(*a);
+   Args.push_back(nullptr);
+   auto const pid = ExecuteProcess(Args.data());
+   return ExecWait(pid, CmdL.FileList[1]);
+}
+									/*}}}*/
+static bool AnalyzePattern(CommandLine &CmdL)				/*{{{*/
+{
+   if (CmdL.FileSize() != 2)
+      return _error->Error("Expect one argument, a pattern");
+
+   try
+   {
+      auto top = APT::Internal::PatternTreeParser(CmdL.FileList[1]).parseTop();
+      top->render(std::cout) << "\n";
+   }
+   catch (APT::Internal::PatternTreeParser::Error &e)
+   {
+      std::stringstream ss;
+      ss << "input:" << e.location.start << "-" << e.location.end << ": error: " << e.message << "\n";
+      ss << CmdL.FileList[1] << "\n";
+      for (size_t i = 0; i < e.location.start; i++)
+	 ss << " ";
+      for (size_t i = e.location.start; i < e.location.end; i++)
+	 ss << "^";
+
+      ss << "\n";
+
+      _error->Error("%s", ss.str().c_str());
+      return false;
+   }
+
+   return true;
+}
+									/*}}}*/
+static bool DoQuoteString(CommandLine &CmdL)				/*{{{*/
+{
+   if (CmdL.FileSize() != 3)
+      return _error->Error("Expect two arguments, a string to quote and a string of additional characters to quote");
+   std::cout << QuoteString(CmdL.FileList[1], CmdL.FileList[2]) << '\n';
+   return true;
+}
+									/*}}}*/
+static bool ShowHelp(CommandLine &)					/*{{{*/
+{
+   std::cout <<
+      _("Usage: apt-helper [options] command\n"
+	    "       apt-helper [options] cat-file file ...\n"
+	    "       apt-helper [options] download-file uri target-path\n"
+	    "\n"
+	    "apt-helper bundles a variety of commands for shell scripts to use\n"
+	    "e.g. the same proxy configuration or acquire system as APT would.\n");
+   return true;
+}
+									/*}}}*/
+static std::vector<aptDispatchWithHelp> GetCommands()			/*{{{*/
+{
+   return {
+       {"download-file", &DoDownloadFile, _("download the given uri to the target-path")},
+       {"srv-lookup", &DoSrvLookup, _("lookup a SRV record (e.g. _http._tcp.ftp.debian.org)")},
+       {"cat-file", &DoCatFile, _("concatenate files, with automatic decompression")},
+       {"auto-detect-proxy", &DoAutoDetectProxy, _("detect proxy using apt.conf")},
+       {"wait-online", &DoWaitOnline, _("wait for system to be online")},
+       {"drop-privs", &DropPrivsAndRun, _("drop privileges before running given command")},
+       {"analyze-pattern", &AnalyzePattern, _("analyse a pattern")},
+       {"analyse-pattern", &AnalyzePattern, nullptr},
+       {"quote-string", &DoQuoteString, nullptr},
+       {nullptr, nullptr, nullptr}};
+}
+									/*}}}*/
+int main(int argc,const char *argv[])					/*{{{*/
+{
+   CommandLine CmdL;
+   auto const Cmds = ParseCommandLine(CmdL, APT_CMD::APT_HELPER, &_config, &_system, argc, argv, &ShowHelp, &GetCommands);
+
+   InitOutput();
+
+   return DispatchCommandLine(CmdL, Cmds);
+}
+									/*}}}*/