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Diffstat (limited to '')
| -rw-r--r-- | cmdline/apt-helper.cc | 334 |
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..f48cb29 --- /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 <cstdlib> +#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); +} + /*}}}*/ |