// -*- 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/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]; std::string hash; if (CmdL.FileSize() > fileind + 3) hash = CmdL.FileList[fileind + 3]; // we use download_uri as descr and targetfile as short-descr new pkgAcqFile(&Fetcher, download_uri, hash, 0, download_uri, targetfile, "dest-dir-ignored", targetfile); targetfiles.push_back(targetfile); fileind += 3; } 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 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 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")}, {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); } /*}}}*/