diff options
Diffstat (limited to 'apt-pkg/deb/dpkgpm.cc')
| -rw-r--r-- | apt-pkg/deb/dpkgpm.cc | 2491 |
1 files changed, 2491 insertions, 0 deletions
diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc new file mode 100644 index 0000000..ffa880d --- /dev/null +++ b/apt-pkg/deb/dpkgpm.cc @@ -0,0 +1,2491 @@ +// -*- mode: cpp; mode: fold -*- +// Description /*{{{*/ +/* ###################################################################### + + DPKG Package Manager - Provide an interface to dpkg + + ##################################################################### */ + /*}}}*/ +// Includes /*{{{*/ +#include <config.h> + +#include <apt-pkg/cachefile.h> +#include <apt-pkg/configuration.h> +#include <apt-pkg/debsystem.h> +#include <apt-pkg/depcache.h> +#include <apt-pkg/dpkgpm.h> +#include <apt-pkg/error.h> +#include <apt-pkg/fileutl.h> +#include <apt-pkg/install-progress.h> +#include <apt-pkg/macros.h> +#include <apt-pkg/packagemanager.h> +#include <apt-pkg/pkgcache.h> +#include <apt-pkg/statechanges.h> +#include <apt-pkg/strutl.h> +#include <apt-pkg/version.h> + +#include <dirent.h> +#include <errno.h> +#include <fcntl.h> +#include <grp.h> +#include <pwd.h> +#include <signal.h> +#include <stddef.h> +#include <stdio.h> +#include <stdlib.h> +#include <sys/ioctl.h> +#include <sys/select.h> +#include <sys/stat.h> +#include <sys/time.h> +#include <sys/types.h> +#include <sys/wait.h> +#include <termios.h> +#include <time.h> +#include <unistd.h> + +#include <algorithm> +#include <array> +#include <cstring> +#include <iostream> +#include <map> +#include <numeric> +#include <set> +#include <sstream> +#include <string> +#include <type_traits> +#include <unordered_set> +#include <utility> +#include <vector> + +#include <apti18n.h> + /*}}}*/ + +extern char **environ; + +using namespace std; + +APT_PURE static string AptHistoryRequestingUser() /*{{{*/ +{ + const char* EnvKeys[]{"SUDO_UID", "PKEXEC_UID", "PACKAGEKIT_CALLER_UID"}; + + for (const auto &Key: EnvKeys) + { + if (getenv(Key) != nullptr) + { + int uid = atoi(getenv(Key)); + if (uid > 0) { + struct passwd pwd; + struct passwd *result; + char buf[255]; + if (getpwuid_r(uid, &pwd, buf, sizeof(buf), &result) == 0 && result != NULL) { + std::string res; + strprintf(res, "%s (%d)", pwd.pw_name, uid); + return res; + } + } + } + } + return ""; +} + /*}}}*/ +APT_PURE static unsigned int EnvironmentSize() /*{{{*/ +{ + unsigned int size = 0; + char **envp = environ; + + while (*envp != NULL) + size += strlen (*envp++) + 1; + + return size; +} + /*}}}*/ +class pkgDPkgPMPrivate /*{{{*/ +{ +public: + pkgDPkgPMPrivate() : stdin_is_dev_null(false), status_fd_reached_end_of_file(false), + dpkgbuf_pos(0), term_out(NULL), history_out(NULL), + progress(NULL), tt_is_valid(false), master(-1), + slave(NULL), protect_slave_from_dying(-1), + direct_stdin(false) + { + dpkgbuf[0] = '\0'; + } + ~pkgDPkgPMPrivate() + { + } + bool stdin_is_dev_null; + bool status_fd_reached_end_of_file; + // the buffer we use for the dpkg status-fd reading + char dpkgbuf[1024]; + size_t dpkgbuf_pos; + FILE *term_out; + FILE *history_out; + string dpkg_error; + APT::Progress::PackageManager *progress; + + // pty stuff + struct termios tt; + bool tt_is_valid; + int master; + char * slave; + int protect_slave_from_dying; + + // signals + sigset_t sigmask; + sigset_t original_sigmask; + + bool direct_stdin; +}; + /*}}}*/ +namespace +{ + // Maps the dpkg "processing" info to human readable names. Entry 0 + // of each array is the key, entry 1 is the value. + const std::pair<const char *, const char *> PackageProcessingOps[] = { + std::make_pair("install", N_("Preparing %s")), + // we don't care for the difference + std::make_pair("upgrade", N_("Preparing %s")), + std::make_pair("configure", N_("Preparing to configure %s")), + std::make_pair("remove", N_("Preparing for removal of %s")), + std::make_pair("purge", N_("Preparing to completely remove %s")), + std::make_pair("disappear", N_("Noting disappearance of %s")), + std::make_pair("trigproc", N_("Running post-installation trigger %s")) + }; + + const std::pair<const char *, const char *> * const PackageProcessingOpsBegin = PackageProcessingOps; + const std::pair<const char *, const char *> * const PackageProcessingOpsEnd = PackageProcessingOps + sizeof(PackageProcessingOps) / sizeof(PackageProcessingOps[0]); + + // Predicate to test whether an entry in the PackageProcessingOps + // array matches a string. + class MatchProcessingOp + { + const char *target; + + public: + explicit MatchProcessingOp(const char *the_target) + : target(the_target) + { + } + + bool operator()(const std::pair<const char *, const char *> &pair) const + { + return strcmp(pair.first, target) == 0; + } + }; +} + +// ionice - helper function to ionice the given PID /*{{{*/ +/* there is no C header for ionice yet - just the syscall interface + so we use the binary from util-linux */ +static bool ionice(int PID) +{ + if (!FileExists("/usr/bin/ionice")) + return false; + pid_t Process = ExecFork(); + if (Process == 0) + { + char buf[32]; + snprintf(buf, sizeof(buf), "-p%d", PID); + const char *Args[4]; + Args[0] = "/usr/bin/ionice"; + Args[1] = "-c3"; + Args[2] = buf; + Args[3] = 0; + execv(Args[0], (char **)Args); + } + return ExecWait(Process, "ionice"); +} + /*}}}*/ +// FindNowVersion - Helper to find a Version in "now" state /*{{{*/ +// --------------------------------------------------------------------- +/* This is helpful when a package is no longer installed but has residual + * config files + */ +static +pkgCache::VerIterator FindNowVersion(const pkgCache::PkgIterator &Pkg) +{ + pkgCache::VerIterator Ver; + for (Ver = Pkg.VersionList(); Ver.end() == false; ++Ver) + for (pkgCache::VerFileIterator Vf = Ver.FileList(); Vf.end() == false; ++Vf) + for (pkgCache::PkgFileIterator F = Vf.File(); F.end() == false; ++F) + { + if (F.Archive() != 0 && strcmp(F.Archive(), "now") == 0) + return Ver; + } + return Ver; +} + /*}}}*/ +static pkgCache::VerIterator FindToBeRemovedVersion(pkgCache::PkgIterator const &Pkg)/*{{{*/ +{ + auto const PV = Pkg.CurrentVer(); + if (PV.end() == false) + return PV; + return FindNowVersion(Pkg); +} + /*}}}*/ + +// DPkgPM::pkgDPkgPM - Constructor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) + : pkgPackageManager(Cache),d(new pkgDPkgPMPrivate()), pkgFailures(0), PackagesDone(0), PackagesTotal(0) +{ +} + /*}}}*/ +// DPkgPM::pkgDPkgPM - Destructor /*{{{*/ +// --------------------------------------------------------------------- +/* */ +pkgDPkgPM::~pkgDPkgPM() +{ + delete d; +} + /*}}}*/ +// DPkgPM::Install - Install a package /*{{{*/ +// --------------------------------------------------------------------- +/* Add an install operation to the sequence list */ +bool pkgDPkgPM::Install(PkgIterator Pkg,string File) +{ + if (File.empty() == true || Pkg.end() == true) + return _error->Error("Internal Error, No file name for %s",Pkg.FullName().c_str()); + + // If the filename string begins with DPkg::Chroot-Directory, return the + // substr that is within the chroot so dpkg can access it. + string const chrootdir = _config->FindDir("DPkg::Chroot-Directory","/"); + if (chrootdir != "/" && File.find(chrootdir) == 0) + { + size_t len = chrootdir.length(); + if (chrootdir.at(len - 1) == '/') + len--; + List.push_back(Item(Item::Install,Pkg,File.substr(len))); + } + else + List.push_back(Item(Item::Install,Pkg,File)); + + return true; +} + /*}}}*/ +// DPkgPM::Configure - Configure a package /*{{{*/ +// --------------------------------------------------------------------- +/* Add a configure operation to the sequence list */ +bool pkgDPkgPM::Configure(PkgIterator Pkg) +{ + if (Pkg.end() == true) + return false; + + List.push_back(Item(Item::Configure, Pkg)); + + // Use triggers for config calls if we configure "smart" + // as otherwise Pre-Depends will not be satisfied, see #526774 + if (_config->FindB("DPkg::TriggersPending", false) == true) + List.push_back(Item(Item::TriggersPending, PkgIterator())); + + return true; +} + /*}}}*/ +// DPkgPM::Remove - Remove a package /*{{{*/ +// --------------------------------------------------------------------- +/* Add a remove operation to the sequence list */ +bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge) +{ + if (Pkg.end() == true) + return false; + + if (Purge == true) + List.push_back(Item(Item::Purge,Pkg)); + else + List.push_back(Item(Item::Remove,Pkg)); + return true; +} + /*}}}*/ +// DPkgPM::SendPkgInfo - Send info for install-pkgs hook /*{{{*/ +// --------------------------------------------------------------------- +/* This is part of the helper script communication interface, it sends + very complete information down to the other end of the pipe.*/ +bool pkgDPkgPM::SendV2Pkgs(FILE *F) +{ + return SendPkgsInfo(F, 2); +} +bool pkgDPkgPM::SendPkgsInfo(FILE * const F, unsigned int const &Version) +{ + // This version of APT supports only v3, so don't sent higher versions + if (Version <= 3) + fprintf(F,"VERSION %u\n", Version); + else + fprintf(F,"VERSION 3\n"); + + /* Write out all of the configuration directives by walking the + configuration tree */ + const Configuration::Item *Top = _config->Tree(0); + for (; Top != 0;) + { + if (Top->Value.empty() == false) + { + fprintf(F,"%s=%s\n", + QuoteString(Top->FullTag(),"=\"\n").c_str(), + QuoteString(Top->Value,"\n").c_str()); + } + + if (Top->Child != 0) + { + Top = Top->Child; + continue; + } + + while (Top != 0 && Top->Next == 0) + Top = Top->Parent; + if (Top != 0) + Top = Top->Next; + } + fprintf(F,"\n"); + + // Write out the package actions in order. + for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I) + { + if(I->Pkg.end() == true) + continue; + + pkgDepCache::StateCache &S = Cache[I->Pkg]; + + fprintf(F,"%s ",I->Pkg.Name()); + + // Current version which we are going to replace + pkgCache::VerIterator CurVer = I->Pkg.CurrentVer(); + if (CurVer.end() == true && (I->Op == Item::Remove || I->Op == Item::Purge)) + CurVer = FindNowVersion(I->Pkg); + + if (CurVer.end() == true) + { + if (Version <= 2) + fprintf(F, "- "); + else + fprintf(F, "- - none "); + } + else + { + fprintf(F, "%s ", CurVer.VerStr()); + if (Version >= 3) + fprintf(F, "%s %s ", CurVer.Arch(), CurVer.MultiArchType()); + } + + // Show the compare operator between current and install version + if (S.InstallVer != 0) + { + pkgCache::VerIterator const InstVer = S.InstVerIter(Cache); + int Comp = 2; + if (CurVer.end() == false) + Comp = InstVer.CompareVer(CurVer); + if (Comp < 0) + fprintf(F,"> "); + else if (Comp == 0) + fprintf(F,"= "); + else if (Comp > 0) + fprintf(F,"< "); + fprintf(F, "%s ", InstVer.VerStr()); + if (Version >= 3) + fprintf(F, "%s %s ", InstVer.Arch(), InstVer.MultiArchType()); + } + else + { + if (Version <= 2) + fprintf(F, "> - "); + else + fprintf(F, "> - - none "); + } + + // Show the filename/operation + if (I->Op == Item::Install) + { + // No errors here.. + if (I->File[0] != '/') + fprintf(F,"**ERROR**\n"); + else + fprintf(F,"%s\n",I->File.c_str()); + } + else if (I->Op == Item::Configure) + fprintf(F,"**CONFIGURE**\n"); + else if (I->Op == Item::Remove || + I->Op == Item::Purge) + fprintf(F,"**REMOVE**\n"); + + if (ferror(F) != 0) + return false; + } + return true; +} + /*}}}*/ +// DPkgPM::RunScriptsWithPkgs - Run scripts with package names on stdin /*{{{*/ +// --------------------------------------------------------------------- +/* This looks for a list of scripts to run from the configuration file + each one is run and is fed on standard input a list of all .deb files + that are due to be installed. */ +bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) +{ + bool result = true; + + Configuration::Item const *Opts = _config->Tree(Cnf); + if (Opts == 0 || Opts->Child == 0) + return true; + Opts = Opts->Child; + + sighandler_t old_sigpipe = signal(SIGPIPE, SIG_IGN); + sighandler_t old_sigint = signal(SIGINT, SIG_IGN); + sighandler_t old_sigquit = signal(SIGQUIT, SIG_IGN); + + unsigned int Count = 1; + for (; Opts != 0; Opts = Opts->Next, Count++) + { + if (Opts->Value.empty() == true) + continue; + + if(_config->FindB("Debug::RunScripts", false) == true) + std::clog << "Running external script with list of all .deb file: '" + << Opts->Value << "'" << std::endl; + + // Determine the protocol version + string OptSec = Opts->Value; + string::size_type Pos; + if ((Pos = OptSec.find(' ')) == string::npos || Pos == 0) + Pos = OptSec.length(); + OptSec = "DPkg::Tools::Options::" + string(Opts->Value.c_str(),Pos); + + unsigned int Version = _config->FindI(OptSec+"::Version",1); + unsigned int InfoFD = _config->FindI(OptSec + "::InfoFD", STDIN_FILENO); + + // Create the pipes + std::set<int> KeepFDs; + MergeKeepFdsFromConfiguration(KeepFDs); + int Pipes[2]; + if (pipe(Pipes) != 0) { + result = _error->Errno("pipe","Failed to create IPC pipe to subprocess"); + break; + } + if (InfoFD != (unsigned)Pipes[0]) + SetCloseExec(Pipes[0],true); + else + KeepFDs.insert(Pipes[0]); + + + SetCloseExec(Pipes[1],true); + + // Purified Fork for running the script + pid_t Process = ExecFork(KeepFDs); + if (Process == 0) + { + // Setup the FDs + dup2(Pipes[0], InfoFD); + SetCloseExec(STDOUT_FILENO,false); + SetCloseExec(STDIN_FILENO,false); + SetCloseExec(STDERR_FILENO,false); + + string hookfd; + strprintf(hookfd, "%d", InfoFD); + setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1); + + if (_system != nullptr && _system->IsLocked() == true && stringcasecmp(Cnf, "DPkg::Pre-Install-Pkgs") == 0) + setenv("DPKG_FRONTEND_LOCKED", "true", 1); + + debSystem::DpkgChrootDirectory(); + const char *Args[4]; + Args[0] = "/bin/sh"; + Args[1] = "-c"; + Args[2] = Opts->Value.c_str(); + Args[3] = 0; + execv(Args[0],(char **)Args); + _exit(100); + } + close(Pipes[0]); + FILE *F = fdopen(Pipes[1],"w"); + if (F == 0) { + result = _error->Errno("fdopen","Failed to open new FD"); + break; + } + + // Feed it the filenames. + if (Version <= 1) + { + for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I) + { + // Only deal with packages to be installed from .deb + if (I->Op != Item::Install) + continue; + + // No errors here.. + if (I->File[0] != '/') + continue; + + /* Feed the filename of each package that is pending install + into the pipe. */ + fprintf(F,"%s\n",I->File.c_str()); + if (ferror(F) != 0) + break; + } + } + else + SendPkgsInfo(F, Version); + + fclose(F); + + // Clean up the sub process + if (ExecWait(Process,Opts->Value.c_str()) == false) { + result = _error->Error("Failure running script %s",Opts->Value.c_str()); + break; + } + } + signal(SIGINT, old_sigint); + signal(SIGPIPE, old_sigpipe); + signal(SIGQUIT, old_sigquit); + + return result; +} + /*}}}*/ +// DPkgPM::DoStdin - Read stdin and pass to master pty /*{{{*/ +// --------------------------------------------------------------------- +/* +*/ +void pkgDPkgPM::DoStdin(int master) +{ + unsigned char input_buf[256] = {0,}; + ssize_t len = read(STDIN_FILENO, input_buf, sizeof(input_buf)); + if (len) + FileFd::Write(master, input_buf, len); + else + d->stdin_is_dev_null = true; +} + /*}}}*/ +// DPkgPM::DoTerminalPty - Read the terminal pty and write log /*{{{*/ +// --------------------------------------------------------------------- +/* + * read the terminal pty and write log + */ +void pkgDPkgPM::DoTerminalPty(int master) +{ + unsigned char term_buf[1024] = {0,0, }; + + ssize_t len=read(master, term_buf, sizeof(term_buf)); + if(len == -1 && errno == EIO) + { + // this happens when the child is about to exit, we + // give it time to actually exit, otherwise we run + // into a race so we sleep for half a second. + struct timespec sleepfor = { 0, 500000000 }; + nanosleep(&sleepfor, NULL); + return; + } + if(len <= 0) + return; + FileFd::Write(1, term_buf, len); + if(d->term_out) + fwrite(term_buf, len, sizeof(char), d->term_out); +} + /*}}}*/ +// DPkgPM::ProcessDpkgStatusBuf /*{{{*/ +void pkgDPkgPM::ProcessDpkgStatusLine(char *line) +{ + bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false); + if (Debug == true) + std::clog << "got from dpkg '" << line << "'" << std::endl; + + /* dpkg sends strings like this: + 'status: <pkg>: <pkg qstate>' + 'status: <pkg>:<arch>: <pkg qstate>' + + 'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: pkg' + 'processing: {install,upgrade,configure,remove,purge,disappear,trigproc}: trigger' + */ + + // we need to split on ": " (note the appended space) as the ':' is + // part of the pkgname:arch information that dpkg sends + // + // A dpkg error message may contain additional ":" (like + // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..." + // so we need to ensure to not split too much + std::vector<std::string> list = StringSplit(line, ": ", 4); + if(list.size() < 3) + { + if (Debug == true) + std::clog << "ignoring line: not enough ':'" << std::endl; + return; + } + + // build the (prefix, pkgname, action) tuple, position of this + // is different for "processing" or "status" messages + std::string prefix = APT::String::Strip(list[0]); + std::string pkgname; + std::string action; + + // "processing" has the form "processing: action: pkg or trigger" + // with action = ["install", "upgrade", "configure", "remove", "purge", + // "disappear", "trigproc"] + if (prefix == "processing") + { + pkgname = APT::String::Strip(list[2]); + action = APT::String::Strip(list[1]); + } + // "status" has the form: "status: pkg: state" + // with state in ["half-installed", "unpacked", "half-configured", + // "installed", "config-files", "not-installed"] + else if (prefix == "status") + { + pkgname = APT::String::Strip(list[1]); + action = APT::String::Strip(list[2]); + + /* handle the special cases first: + + errors look like this: + 'status: /var/cache/apt/archives/krecipes_0.8.1-0ubuntu1_i386.deb : error : trying to overwrite `/usr/share/doc/kde/HTML/en/krecipes/krectip.png', which is also in package krecipes-data + and conffile-prompt like this + 'status:/etc/compiz.conf/compiz.conf : conffile-prompt: 'current-conffile' 'new-conffile' useredited distedited + */ + if(action == "error") + { + d->progress->Error(pkgname, PackagesDone, PackagesTotal, list[3]); + ++pkgFailures; + WriteApportReport(pkgname.c_str(), list[3].c_str()); + return; + } + else if(action == "conffile-prompt") + { + d->progress->ConffilePrompt(pkgname, PackagesDone, PackagesTotal, list[3]); + return; + } + } else { + if (Debug == true) + std::clog << "unknown prefix '" << prefix << "'" << std::endl; + return; + } + + // At this point we have a pkgname, but it might not be arch-qualified ! + if (pkgname.find(":") == std::string::npos) + { + pkgCache::GrpIterator const Grp = Cache.FindGrp(pkgname); + if (unlikely(Grp.end()== true)) + { + if (Debug == true) + std::clog << "unable to figure out which package is dpkg referring to with '" << pkgname << "'! (0)" << std::endl; + return; + } + /* No arch means that dpkg believes there can only be one package + this can refer to so lets see what could be candidates here: */ + std::vector<pkgCache::PkgIterator> candset; + for (auto P = Grp.PackageList(); P.end() != true; P = Grp.NextPkg(P)) + { + if (PackageOps.find(P.FullName()) != PackageOps.end()) + candset.push_back(P); + // packages can disappear without them having any interaction itself + // so we have to consider these as candidates, too + else if (P->CurrentVer != 0 && action == "disappear") + candset.push_back(P); + } + if (unlikely(candset.empty())) + { + if (Debug == true) + std::clog << "unable to figure out which package is dpkg referring to with '" << pkgname << "'! (1)" << std::endl; + return; + } + else if (candset.size() == 1) // we are lucky + pkgname = candset.cbegin()->FullName(); + else + { + /* here be dragons^Wassumptions about dpkg: + - an M-A:same version is always arch-qualified + - a package from a foreign arch is (in newer versions) */ + size_t installedInstances = 0, wannabeInstances = 0; + for (auto const &P: candset) + { + if (P->CurrentVer != 0) + { + ++installedInstances; + if (Cache[P].Delete() == false) + ++wannabeInstances; + } + else if (Cache[P].Install()) + ++wannabeInstances; + } + // the package becomes M-A:same, so we are still talking about current + if (installedInstances == 1 && wannabeInstances >= 2) + { + for (auto const &P: candset) + { + if (P->CurrentVer == 0) + continue; + pkgname = P.FullName(); + break; + } + } + // the package was M-A:same, it isn't now, so we can only talk about that + else if (installedInstances >= 2 && wannabeInstances == 1) + { + for (auto const &P: candset) + { + auto const IV = Cache[P].InstVerIter(Cache); + if (IV.end()) + continue; + pkgname = P.FullName(); + break; + } + } + // that is a crossgrade + else if (installedInstances == 1 && wannabeInstances == 1 && candset.size() == 2) + { + auto const PkgHasCurrentVersion = [](pkgCache::PkgIterator const &P) { return P->CurrentVer != 0; }; + auto const P = std::find_if(candset.begin(), candset.end(), PkgHasCurrentVersion); + if (unlikely(P == candset.end())) + { + if (Debug == true) + std::clog << "situation for '" << pkgname << "' looked like a crossgrade, but no current version?!" << std::endl; + return; + } + auto fullname = P->FullName(); + if (PackageOps[fullname].size() != PackageOpsDone[fullname]) + pkgname = std::move(fullname); + else + { + auto const pkgi = std::find_if_not(candset.begin(), candset.end(), PkgHasCurrentVersion); + if (unlikely(pkgi == candset.end())) + { + if (Debug == true) + std::clog << "situation for '" << pkgname << "' looked like a crossgrade, but all are installed?!" << std::endl; + return; + } + pkgname = pkgi->FullName(); + } + } + // we are desperate: so "just" take the native one, but that might change mid-air, + // so we have to ask dpkg what it believes native is at the moment… all the time + else + { + std::vector<std::string> sArgs = debSystem::GetDpkgBaseCommand(); + sArgs.push_back("--print-architecture"); + int outputFd = -1; + pid_t const dpkgNativeArch = debSystem::ExecDpkg(sArgs, nullptr, &outputFd, true); + if (unlikely(dpkgNativeArch == -1)) + { + if (Debug == true) + std::clog << "calling dpkg failed to ask it for its current native architecture to expand '" << pkgname << "'!" << std::endl; + return; + } + FILE *dpkg = fdopen(outputFd, "r"); + if(dpkg != NULL) + { + char* buf = NULL; + size_t bufsize = 0; + if (getline(&buf, &bufsize, dpkg) != -1) + pkgname += ':' + bufsize; + free(buf); + fclose(dpkg); + } + ExecWait(dpkgNativeArch, "dpkg --print-architecture", true); + if (pkgname.find(':') != std::string::npos) + { + if (Debug == true) + std::clog << "unable to figure out which package is dpkg referring to with '" << pkgname << "'! (2)" << std::endl; + return; + } + } + } + } + + std::string arch = ""; + if (pkgname.find(":") != string::npos) + arch = StringSplit(pkgname, ":")[1]; + std::string i18n_pkgname = pkgname; + if (arch.size() != 0) + strprintf(i18n_pkgname, "%s (%s)", StringSplit(pkgname, ":")[0].c_str(), arch.c_str()); + + // 'processing' from dpkg looks like + // 'processing: action: pkg' + if(prefix == "processing") + { + auto const iter = std::find_if(PackageProcessingOpsBegin, PackageProcessingOpsEnd, MatchProcessingOp(action.c_str())); + if(iter == PackageProcessingOpsEnd) + { + if (Debug == true) + std::clog << "ignoring unknown action: " << action << std::endl; + return; + } + std::string msg; + strprintf(msg, _(iter->second), i18n_pkgname.c_str()); + d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg); + + // FIXME: this needs a muliarch testcase + // FIXME2: is "pkgname" here reliable with dpkg only sending us + // short pkgnames? + if (action == "disappear") + handleDisappearAction(pkgname); + else if (action == "upgrade") + handleCrossUpgradeAction(pkgname); + return; + } + + if (prefix == "status") + { + std::vector<struct DpkgState> &states = PackageOps[pkgname]; + if(PackageOpsDone[pkgname] < states.size()) + { + char const * next_action = states[PackageOpsDone[pkgname]].state; + if (next_action) + { + /* + if (action == "half-installed" && strcmp("half-configured", next_action) == 0 && + PackageOpsDone[pkg] + 2 < states.size() && action == states[PackageOpsDone[pkg] + 2].state) + { + if (Debug == true) + std::clog << "(parsed from dpkg) pkg: " << short_pkgname << " action: " << action + << " pending trigger defused by unpack" << std::endl; + // unpacking a package defuses the pending trigger + PackageOpsDone[pkg] += 2; + PackagesDone += 2; + next_action = states[PackageOpsDone[pkg]].state; + } + */ + if (Debug == true) + std::clog << "(parsed from dpkg) pkg: " << pkgname + << " action: " << action << " (expected: '" << next_action << "' " + << PackageOpsDone[pkgname] << " of " << states.size() << ")" << endl; + + // check if the package moved to the next dpkg state + if(action == next_action) + { + // only read the translation if there is actually a next action + char const * const translation = _(states[PackageOpsDone[pkgname]].str); + + // we moved from one dpkg state to a new one, report that + ++PackageOpsDone[pkgname]; + ++PackagesDone; + + std::string msg; + strprintf(msg, translation, i18n_pkgname.c_str()); + d->progress->StatusChanged(pkgname, PackagesDone, PackagesTotal, msg); + } + } + } + else if (action == "triggers-pending") + { + if (Debug == true) + std::clog << "(parsed from dpkg) pkg: " << pkgname + << " action: " << action << " (prefix 2 to " + << PackageOpsDone[pkgname] << " of " << states.size() << ")" << endl; + + states.insert(states.begin(), {"installed", N_("Installed %s")}); + states.insert(states.begin(), {"half-configured", N_("Configuring %s")}); + PackagesTotal += 2; + } + } +} + /*}}}*/ +// DPkgPM::handleDisappearAction /*{{{*/ +void pkgDPkgPM::handleDisappearAction(string const &pkgname) +{ + pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname); + if (unlikely(Pkg.end() == true)) + return; + + // a disappeared package has no further actions + auto const ROps = PackageOps[Pkg.FullName()].size(); + auto && ROpsDone = PackageOpsDone[Pkg.FullName()]; + PackagesDone += ROps - ROpsDone; + ROpsDone = ROps; + + // record the package name for display and stuff later + disappearedPkgs.insert(Pkg.FullName(true)); + + // the disappeared package was auto-installed - nothing to do + if ((Cache[Pkg].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) + return; + pkgCache::VerIterator PkgVer = Cache[Pkg].InstVerIter(Cache); + if (unlikely(PkgVer.end() == true)) + return; + /* search in the list of dependencies for (Pre)Depends, + check if this dependency has a Replaces on our package + and if so transfer the manual installed flag to it */ + for (pkgCache::DepIterator Dep = PkgVer.DependsList(); Dep.end() != true; ++Dep) + { + if (Dep->Type != pkgCache::Dep::Depends && + Dep->Type != pkgCache::Dep::PreDepends) + continue; + pkgCache::PkgIterator Tar = Dep.TargetPkg(); + if (unlikely(Tar.end() == true)) + continue; + // the package is already marked as manual + if ((Cache[Tar].Flags & pkgCache::Flag::Auto) != pkgCache::Flag::Auto) + continue; + pkgCache::VerIterator TarVer = Cache[Tar].InstVerIter(Cache); + if (TarVer.end() == true) + continue; + for (pkgCache::DepIterator Rep = TarVer.DependsList(); Rep.end() != true; ++Rep) + { + if (Rep->Type != pkgCache::Dep::Replaces) + continue; + if (Pkg != Rep.TargetPkg()) + continue; + // okay, they are strongly connected - transfer manual-bit + if (Debug == true) + std::clog << "transfer manual-bit from disappeared »" << pkgname << "« to »" << Tar.FullName() << "«" << std::endl; + Cache[Tar].Flags &= ~Flag::Auto; + break; + } + } +} + /*}}}*/ +void pkgDPkgPM::handleCrossUpgradeAction(string const &pkgname) /*{{{*/ +{ + // in a crossgrade what looked like a remove first is really an unpack over it + auto const Pkg = Cache.FindPkg(pkgname); + if (likely(Pkg.end() == false) && Cache[Pkg].Delete()) + { + auto const Grp = Pkg.Group(); + if (likely(Grp.end() == false)) + { + for (auto P = Grp.PackageList(); P.end() != true; P = Grp.NextPkg(P)) + if(Cache[P].Install()) + { + auto && Ops = PackageOps[P.FullName()]; + auto const unpackOp = std::find_if(Ops.cbegin(), Ops.cend(), [](DpkgState const &s) { return strcmp(s.state, "unpacked") == 0; }); + if (unpackOp != Ops.cend()) + { + // skip ahead in the crossgraded packages + auto const skipped = std::distance(Ops.cbegin(), unpackOp); + PackagesDone += skipped; + PackageOpsDone[P.FullName()] += skipped; + // finish the crossremoved package + auto const ROps = PackageOps[Pkg.FullName()].size(); + auto && ROpsDone = PackageOpsDone[Pkg.FullName()]; + PackagesDone += ROps - ROpsDone; + ROpsDone = ROps; + break; + } + } + } + } +} + /*}}}*/ +// DPkgPM::DoDpkgStatusFd /*{{{*/ +void pkgDPkgPM::DoDpkgStatusFd(int statusfd) +{ + auto const remainingBuffer = (sizeof(d->dpkgbuf) / sizeof(d->dpkgbuf[0])) - d->dpkgbuf_pos; + if (likely(remainingBuffer > 0) && d->status_fd_reached_end_of_file == false) + { + auto const len = read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], remainingBuffer); + if (len < 0) + return; + else if (len == 0 && d->dpkgbuf_pos == 0) + { + d->status_fd_reached_end_of_file = true; + return; + } + d->dpkgbuf_pos += (len / sizeof(d->dpkgbuf[0])); + } + + // process line by line from the buffer + char *p = d->dpkgbuf, *q = nullptr; + while((q=(char*)memchr(p, '\n', (d->dpkgbuf + d->dpkgbuf_pos) - p)) != nullptr) + { + *q = '\0'; + ProcessDpkgStatusLine(p); + p = q + 1; // continue with next line + } + + // check if we stripped the buffer clean + if (p > (d->dpkgbuf + d->dpkgbuf_pos)) + { + d->dpkgbuf_pos = 0; + return; + } + + // otherwise move the unprocessed tail to the start and update pos + memmove(d->dpkgbuf, p, (p - d->dpkgbuf)); + d->dpkgbuf_pos = (d->dpkgbuf + d->dpkgbuf_pos) - p; +} + /*}}}*/ +// DPkgPM::WriteHistoryTag /*{{{*/ +void pkgDPkgPM::WriteHistoryTag(string const &tag, string value) +{ + size_t const length = value.length(); + if (length == 0) + return; + // poor mans rstrip(", ") + if (value[length-2] == ',' && value[length-1] == ' ') + value.erase(length - 2, 2); + fprintf(d->history_out, "%s: %s\n", tag.c_str(), value.c_str()); +} /*}}}*/ +// DPkgPM::OpenLog /*{{{*/ +bool pkgDPkgPM::OpenLog() +{ + string const logfile_name = _config->FindFile("Dir::Log::Terminal", "/dev/null"); + string logdir = flNotFile(logfile_name); + if(CreateAPTDirectoryIfNeeded(logdir, logdir) == false) + // FIXME: use a better string after freeze + return _error->Error(_("Directory '%s' missing"), logdir.c_str()); + + // get current time + char timestr[200]; + time_t const t = time(NULL); + struct tm tm_buf; + struct tm const * const tmp = localtime_r(&t, &tm_buf); + strftime(timestr, sizeof(timestr), "%F %T", tmp); + + // open terminal log + if (logfile_name != "/dev/null") + { + d->term_out = fopen(logfile_name.c_str(),"a"); + if (d->term_out == NULL) + return _error->WarningE("OpenLog", _("Could not open file '%s'"), logfile_name.c_str()); + setvbuf(d->term_out, NULL, _IONBF, 0); + SetCloseExec(fileno(d->term_out), true); + if (getuid() == 0) // if we aren't root, we can't chown a file, so don't try it + { + struct passwd *pw = getpwnam("root"); + struct group *gr = getgrnam("adm"); + if (pw != NULL && gr != NULL && chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid) != 0) + _error->WarningE("OpenLog", "chown to root:adm of file %s failed", logfile_name.c_str()); + } + if (chmod(logfile_name.c_str(), 0640) != 0) + _error->WarningE("OpenLog", "chmod 0640 of file %s failed", logfile_name.c_str()); + fprintf(d->term_out, "\nLog started: %s\n", timestr); + } + + // write your history + string const history_name = _config->FindFile("Dir::Log::History", "/dev/null"); + string logdir2 = flNotFile(logfile_name); + if(logdir != logdir2 && CreateAPTDirectoryIfNeeded(logdir2, logdir2) == false) + return _error->Error(_("Directory '%s' missing"), logdir.c_str()); + if (history_name != "/dev/null") + { + d->history_out = fopen(history_name.c_str(),"a"); + if (d->history_out == NULL) + return _error->WarningE("OpenLog", _("Could not open file '%s'"), history_name.c_str()); + SetCloseExec(fileno(d->history_out), true); + chmod(history_name.c_str(), 0644); + fprintf(d->history_out, "\nStart-Date: %s\n", timestr); + string remove, purge, install, reinstall, upgrade, downgrade; + for (pkgCache::PkgIterator I = Cache.PkgBegin(); I.end() == false; ++I) + { + enum { CANDIDATE, CANDIDATE_AUTO, CURRENT_CANDIDATE, CURRENT } infostring; + string *line = NULL; + #define HISTORYINFO(X, Y) { line = &X; infostring = Y; } + if (Cache[I].NewInstall() == true) + HISTORYINFO(install, CANDIDATE_AUTO) + else if (Cache[I].ReInstall() == true) + HISTORYINFO(reinstall, CANDIDATE) + else if (Cache[I].Upgrade() == true) + HISTORYINFO(upgrade, CURRENT_CANDIDATE) + else if (Cache[I].Downgrade() == true) + HISTORYINFO(downgrade, CURRENT_CANDIDATE) + else if (Cache[I].Delete() == true) + HISTORYINFO((Cache[I].Purge() ? purge : remove), CURRENT) + else + continue; + #undef HISTORYINFO + line->append(I.FullName(false)).append(" ("); + switch (infostring) { + case CANDIDATE: line->append(Cache[I].CandVersion); break; + case CANDIDATE_AUTO: + line->append(Cache[I].CandVersion); + if ((Cache[I].Flags & pkgCache::Flag::Auto) == pkgCache::Flag::Auto) + line->append(", automatic"); + break; + case CURRENT_CANDIDATE: line->append(Cache[I].CurVersion).append(", ").append(Cache[I].CandVersion); break; + case CURRENT: line->append(Cache[I].CurVersion); break; + } + line->append("), "); + } + if (_config->Exists("Commandline::AsString") == true) + WriteHistoryTag("Commandline", _config->Find("Commandline::AsString")); + std::string RequestingUser = AptHistoryRequestingUser(); + if (RequestingUser != "") + WriteHistoryTag("Requested-By", RequestingUser); + WriteHistoryTag("Install", install); + WriteHistoryTag("Reinstall", reinstall); + WriteHistoryTag("Upgrade", upgrade); + WriteHistoryTag("Downgrade",downgrade); + WriteHistoryTag("Remove",remove); + WriteHistoryTag("Purge",purge); + fflush(d->history_out); + } + + return true; +} + /*}}}*/ +// DPkg::CloseLog /*{{{*/ +bool pkgDPkgPM::CloseLog() +{ + char timestr[200]; + time_t t = time(NULL); + struct tm tm_buf; + struct tm *tmp = localtime_r(&t, &tm_buf); + strftime(timestr, sizeof(timestr), "%F %T", tmp); + + if(d->term_out) + { + fprintf(d->term_out, "Log ended: "); + fprintf(d->term_out, "%s", timestr); + fprintf(d->term_out, "\n"); + fclose(d->term_out); + } + d->term_out = NULL; + + if(d->history_out) + { + if (disappearedPkgs.empty() == false) + { + string disappear; + for (std::set<std::string>::const_iterator d = disappearedPkgs.begin(); + d != disappearedPkgs.end(); ++d) + { + pkgCache::PkgIterator P = Cache.FindPkg(*d); + disappear.append(*d); + if (P.end() == true) + disappear.append(", "); + else + disappear.append(" (").append(Cache[P].CurVersion).append("), "); + } + WriteHistoryTag("Disappeared", disappear); + } + if (d->dpkg_error.empty() == false) + fprintf(d->history_out, "Error: %s\n", d->dpkg_error.c_str()); + fprintf(d->history_out, "End-Date: %s\n", timestr); + fclose(d->history_out); + } + d->history_out = NULL; + + return true; +} + /*}}}*/ + +// DPkgPM::BuildPackagesProgressMap /*{{{*/ +void pkgDPkgPM::BuildPackagesProgressMap() +{ + // map the dpkg states to the operations that are performed + // (this is sorted in the same way as Item::Ops) + static const std::array<std::array<DpkgState, 2>, 4> DpkgStatesOpMap = {{ + // Install operation + {{ + {"half-installed", N_("Unpacking %s")}, + {"unpacked", N_("Installing %s") }, + }}, + // Configure operation + {{ + {"half-configured", N_("Configuring %s") }, + { "installed", N_("Installed %s")}, + }}, + // Remove operation + {{ + {"half-configured", N_("Removing %s")}, + {"half-installed", N_("Removing %s")}, + }}, + // Purge operation + {{ + {"config-files", N_("Completely removing %s")}, + {"not-installed", N_("Completely removed %s")}, + }}, + }}; + static_assert(Item::Purge == 3, "Enum item has unexpected index for mapping array"); + + // init the PackageOps map, go over the list of packages that + // that will be [installed|configured|removed|purged] and add + // them to the PackageOps map (the dpkg states it goes through) + // and the PackageOpsTranslations (human readable strings) + for (auto &&I : List) + { + if(I.Pkg.end() == true) + continue; + + string const name = I.Pkg.FullName(); + PackageOpsDone[name] = 0; + auto AddToPackageOps = [&](decltype(I.Op) const Op) { + auto const DpkgOps = DpkgStatesOpMap[Op]; + std::copy(DpkgOps.begin(), DpkgOps.end(), std::back_inserter(PackageOps[name])); + PackagesTotal += DpkgOps.size(); + }; + // purging a package which is installed first passes through remove states + if (I.Op == Item::Purge && I.Pkg->CurrentVer != 0) + AddToPackageOps(Item::Remove); + AddToPackageOps(I.Op); + + if ((I.Op == Item::Remove || I.Op == Item::Purge) && I.Pkg->CurrentVer != 0) + { + if (I.Pkg->CurrentState == pkgCache::State::UnPacked || + I.Pkg->CurrentState == pkgCache::State::HalfInstalled) + { + if (likely(strcmp(PackageOps[name][0].state, "half-configured") == 0)) + { + ++PackageOpsDone[name]; + --PackagesTotal; + } + } + } + } + /* one extra: We don't want the progress bar to reach 100%, especially not + if we call dpkg --configure --pending and process a bunch of triggers + while showing 100%. Also, spindown takes a while, so never reaching 100% + is way more correct than reaching 100% while still doing stuff even if + doing it this way is slightly bending the rules */ + ++PackagesTotal; +} + /*}}}*/ +bool pkgDPkgPM::Go(int StatusFd) /*{{{*/ +{ + APT::Progress::PackageManager *progress = NULL; + if (StatusFd == -1) + progress = APT::Progress::PackageManagerProgressFactory(); + else + progress = new APT::Progress::PackageManagerProgressFd(StatusFd); + + return Go(progress); +} + /*}}}*/ +void pkgDPkgPM::StartPtyMagic() /*{{{*/ +{ + if (_config->FindB("Dpkg::Use-Pty", true) == false) + { + d->master = -1; + if (d->slave != NULL) + free(d->slave); + d->slave = NULL; + return; + } + + if (isatty(STDIN_FILENO) == 0) + d->direct_stdin = true; + + _error->PushToStack(); + + d->master = posix_openpt(O_RDWR | O_NOCTTY); + if (d->master == -1) + _error->Errno("posix_openpt", _("Can not write log (%s)"), _("Is /dev/pts mounted?")); + else if (unlockpt(d->master) == -1) + _error->Errno("unlockpt", "Unlocking the slave of master fd %d failed!", d->master); + else + { +#ifdef HAVE_PTSNAME_R + char slave_name[64]; // 64 is used by bionic + if (ptsname_r(d->master, slave_name, sizeof(slave_name)) != 0) +#else + char const * const slave_name = ptsname(d->master); + if (slave_name == NULL) +#endif + _error->Errno("ptsname", "Getting name for slave of master fd %d failed!", d->master); + else + { + d->slave = strdup(slave_name); + if (d->slave == NULL) + _error->Errno("strdup", "Copying name %s for slave of master fd %d failed!", slave_name, d->master); + else if (grantpt(d->master) == -1) + _error->Errno("grantpt", "Granting access to slave %s based on master fd %d failed!", slave_name, d->master); + else if (tcgetattr(STDIN_FILENO, &d->tt) == 0) + { + d->tt_is_valid = true; + struct termios raw_tt; + // copy window size of stdout if its a 'good' terminal + if (tcgetattr(STDOUT_FILENO, &raw_tt) == 0) + { + struct winsize win; + if (ioctl(STDOUT_FILENO, TIOCGWINSZ, &win) < 0) + _error->Errno("ioctl", "Getting TIOCGWINSZ from stdout failed!"); + if (ioctl(d->master, TIOCSWINSZ, &win) < 0) + _error->Errno("ioctl", "Setting TIOCSWINSZ for master fd %d failed!", d->master); + } + if (tcsetattr(d->master, TCSANOW, &d->tt) == -1) + _error->Errno("tcsetattr", "Setting in Start via TCSANOW for master fd %d failed!", d->master); + + raw_tt = d->tt; + cfmakeraw(&raw_tt); + raw_tt.c_lflag &= ~ECHO; + raw_tt.c_lflag |= ISIG; + // block SIGTTOU during tcsetattr to prevent a hang if + // the process is a member of the background process group + // http://www.opengroup.org/onlinepubs/000095399/functions/tcsetattr.html + sigemptyset(&d->sigmask); + sigaddset(&d->sigmask, SIGTTOU); + sigprocmask(SIG_BLOCK,&d->sigmask, &d->original_sigmask); + if (tcsetattr(STDIN_FILENO, TCSAFLUSH, &raw_tt) == -1) + _error->Errno("tcsetattr", "Setting in Start via TCSAFLUSH for stdin failed!"); + sigprocmask(SIG_SETMASK, &d->original_sigmask, NULL); + + } + if (d->slave != NULL) + { + /* on linux, closing (and later reopening) all references to the slave + makes the slave a death end, so we open it here to have one open all + the time. We could use this fd in SetupSlavePtyMagic() for linux, but + on kfreebsd we get an incorrect ("step like") output then while it has + no problem with closing all references… so to avoid platform specific + code here we combine both and be happy once more */ + d->protect_slave_from_dying = open(d->slave, O_RDWR | O_CLOEXEC | O_NOCTTY); + } + } + } + + if (_error->PendingError() == true) + { + if (d->master != -1) + { + close(d->master); + d->master = -1; + } + if (d->slave != NULL) + { + free(d->slave); + d->slave = NULL; + } + _error->DumpErrors(std::cerr, GlobalError::DEBUG, false); + } + _error->RevertToStack(); +} + /*}}}*/ +void pkgDPkgPM::SetupSlavePtyMagic() /*{{{*/ +{ + if(d->master == -1 || d->slave == NULL) + return; + + if (close(d->master) == -1) + _error->FatalE("close", "Closing master %d in child failed!", d->master); + d->master = -1; + if (setsid() == -1) + _error->FatalE("setsid", "Starting a new session for child failed!"); + + int const slaveFd = open(d->slave, O_RDWR | O_NOCTTY); + if (slaveFd == -1) + _error->FatalE("open", _("Can not write log (%s)"), _("Is /dev/pts mounted?")); + else if (ioctl(slaveFd, TIOCSCTTY, 0) < 0) + _error->FatalE("ioctl", "Setting TIOCSCTTY for slave fd %d failed!", slaveFd); + else + { + unsigned short i = 0; + if (d->direct_stdin == true) + ++i; + for (; i < 3; ++i) + if (dup2(slaveFd, i) == -1) + _error->FatalE("dup2", "Dupping %d to %d in child failed!", slaveFd, i); + + if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSANOW, &d->tt) < 0) + _error->FatalE("tcsetattr", "Setting in Setup via TCSANOW for slave fd %d failed!", slaveFd); + } + + if (slaveFd != -1) + close(slaveFd); +} + /*}}}*/ +void pkgDPkgPM::StopPtyMagic() /*{{{*/ +{ + if (d->slave != NULL) + free(d->slave); + d->slave = NULL; + if (d->protect_slave_from_dying != -1) + { + close(d->protect_slave_from_dying); + d->protect_slave_from_dying = -1; + } + if(d->master >= 0) + { + if (d->tt_is_valid == true && tcsetattr(STDIN_FILENO, TCSAFLUSH, &d->tt) == -1) + _error->FatalE("tcsetattr", "Setting in Stop via TCSAFLUSH for stdin failed!"); + close(d->master); + d->master = -1; + } +} + /*}}}*/ +static void cleanUpTmpDir(char * const tmpdir) /*{{{*/ +{ + if (tmpdir == nullptr) + return; + DIR * const D = opendir(tmpdir); + if (D == nullptr) + _error->Errno("opendir", _("Unable to read %s"), tmpdir); + else + { + auto const dfd = dirfd(D); + for (struct dirent *Ent = readdir(D); Ent != nullptr; Ent = readdir(D)) + { + if (Ent->d_name[0] == '.') + continue; +#ifdef _DIRENT_HAVE_D_TYPE + if (unlikely(Ent->d_type != DT_LNK && Ent->d_type != DT_UNKNOWN)) + continue; +#endif + if (unlikely(unlinkat(dfd, Ent->d_name, 0) != 0)) + break; + } + closedir(D); + rmdir(tmpdir); + } + free(tmpdir); +} + /*}}}*/ + +// DPkgPM::Go - Run the sequence /*{{{*/ +// --------------------------------------------------------------------- +/* This globs the operations and calls dpkg + * + * If it is called with a progress object apt will report the install + * progress to this object. It maps the dpkg states a package goes + * through to human readable (and i10n-able) + * names and calculates a percentage for each step. + */ +static bool ItemIsEssential(pkgDPkgPM::Item const &I) +{ + static auto const cachegen = _config->Find("pkgCacheGen::Essential"); + if (cachegen == "none" || cachegen == "native") + return true; + if (unlikely(I.Pkg.end())) + return true; + return (I.Pkg->Flags & pkgCache::Flag::Essential) != 0; +} +bool pkgDPkgPM::ExpandPendingCalls(std::vector<Item> &List, pkgDepCache &Cache) +{ + { + std::unordered_set<decltype(pkgCache::Package::ID)> alreadyRemoved; + for (auto && I : List) + if (I.Op == Item::Remove || I.Op == Item::Purge) + alreadyRemoved.insert(I.Pkg->ID); + std::remove_reference<decltype(List)>::type AppendList; + for (auto Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg) + if (Cache[Pkg].Delete() && alreadyRemoved.insert(Pkg->ID).second == true) + AppendList.emplace_back(Cache[Pkg].Purge() ? Item::Purge : Item::Remove, Pkg); + std::move(AppendList.begin(), AppendList.end(), std::back_inserter(List)); + } + { + std::unordered_set<decltype(pkgCache::Package::ID)> alreadyConfigured; + for (auto && I : List) + if (I.Op == Item::Configure) + alreadyConfigured.insert(I.Pkg->ID); + std::remove_reference<decltype(List)>::type AppendList; + for (auto && I : List) + if (I.Op == Item::Install && alreadyConfigured.insert(I.Pkg->ID).second == true) + AppendList.emplace_back(Item::Configure, I.Pkg); + for (auto Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg) + if (Pkg.State() == pkgCache::PkgIterator::NeedsConfigure && + Cache[Pkg].Delete() == false && alreadyConfigured.insert(Pkg->ID).second == true) + AppendList.emplace_back(Item::Configure, Pkg); + std::move(AppendList.begin(), AppendList.end(), std::back_inserter(List)); + } + return true; +} +bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) +{ + struct Inhibitor + { + int Fd = -1; + Inhibitor() + { + if (_config->FindB("DPkg::Inhibit-Shutdown", true)) + Fd = Inhibit("shutdown", "APT", "APT is installing or removing packages", "block"); + } + ~Inhibitor() + { + if (Fd > 0) + close(Fd); + } + } inhibitor; + + // explicitly remove&configure everything for hookscripts and progress building + // we need them only temporarily through, so keep the length and erase afterwards + decltype(List)::const_iterator::difference_type explicitIdx = + std::distance(List.cbegin(), List.cend()); + ExpandPendingCalls(List, Cache); + + /* if dpkg told us that it has already done everything to the package we wanted it to do, + we shouldn't ask it for "more" later. That can e.g. happen if packages without conffiles + are purged as they will have pass through the purge states on remove already */ + auto const StripAlreadyDoneFrom = [&](APT::VersionVector & Pending) { + Pending.erase(std::remove_if(Pending.begin(), Pending.end(), [&](pkgCache::VerIterator const &Ver) { + auto const PN = Ver.ParentPkg().FullName(); + auto const POD = PackageOpsDone.find(PN); + if (POD == PackageOpsDone.end()) + return false; + return PackageOps[PN].size() <= POD->second; + }), Pending.end()); + }; + + pkgPackageManager::SigINTStop = false; + d->progress = progress; + + // Generate the base argument list for dpkg + std::vector<std::string> const sArgs = debSystem::GetDpkgBaseCommand(); + std::vector<const char *> Args(sArgs.size(), NULL); + std::transform(sArgs.begin(), sArgs.end(), Args.begin(), + [](std::string const &s) { return s.c_str(); }); + unsigned long long const StartSize = std::accumulate(sArgs.begin(), sArgs.end(), 0llu, + [](unsigned long long const i, std::string const &s) { return i + s.length(); }); + size_t const BaseArgs = Args.size(); + + fd_set rfds; + struct timespec tv; + + // try to figure out the max environment size + int OSArgMax = sysconf(_SC_ARG_MAX); + if(OSArgMax < 0) + OSArgMax = 32*1024; + OSArgMax -= EnvironmentSize() - 2*1024; + unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes", OSArgMax); + bool const NoTriggers = _config->FindB("DPkg::NoTriggers", true); + + if (RunScripts("DPkg::Pre-Invoke") == false) + return false; + + if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false) + return false; + + auto const noopDPkgInvocation = _config->FindB("Debug::pkgDPkgPM",false); + // store auto-bits as they are supposed to be after dpkg is run + if (noopDPkgInvocation == false) + Cache.writeStateFile(NULL); + + bool dpkg_recursive_install = _config->FindB("dpkg::install::recursive", false); + if (_config->FindB("dpkg::install::recursive::force", false) == false) + { + // dpkg uses a sorted treewalk since that version which enables the workaround to work + auto const dpkgpkg = Cache.FindPkg("dpkg"); + if (likely(dpkgpkg.end() == false && dpkgpkg->CurrentVer != 0)) + dpkg_recursive_install = Cache.VS().CmpVersion("1.18.5", dpkgpkg.CurrentVer().VerStr()) <= 0; + } + // no point in doing this dance for a handful of packages only + unsigned int const dpkg_recursive_install_min = _config->FindI("dpkg::install::recursive::minimum", 5); + // FIXME: workaround for dpkg bug, see our ./test-bug-740843-versioned-up-down-breaks test + bool const dpkg_recursive_install_numbered = _config->FindB("dpkg::install::recursive::numbered", true); + + // for the progress + BuildPackagesProgressMap(); + + APT::StateChanges approvedStates; + if (_config->FindB("dpkg::selection::remove::approved", true)) + { + for (auto && I : List) + if (I.Op == Item::Purge) + approvedStates.Purge(FindToBeRemovedVersion(I.Pkg)); + else if (I.Op == Item::Remove) + approvedStates.Remove(FindToBeRemovedVersion(I.Pkg)); + } + + // Skip removes if we install another architecture of this package soon (crossgrade) + // We can't just skip them all the time as it could be an ordering requirement [of another package] + if ((approvedStates.Remove().empty() == false || approvedStates.Purge().empty() == false) && + _config->FindB("dpkg::remove::crossgrade::implicit", true) == true) + { + std::unordered_set<decltype(pkgCache::Package::ID)> crossgraded; + std::vector<std::pair<Item*, std::string>> toCrossgrade; + auto const PlanedEnd = std::next(List.begin(), explicitIdx); + for (auto I = List.begin(); I != PlanedEnd; ++I) + { + if (I->Op != Item::Remove && I->Op != Item::Purge) + continue; + + auto const Grp = I->Pkg.Group(); + size_t installedInstances = 0, wannabeInstances = 0; + bool multiArchInstances = false; + for (auto Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg)) + { + if (Pkg->CurrentVer != 0) + { + ++installedInstances; + if (Cache[Pkg].Delete() == false) + ++wannabeInstances; + } + else if (PackageOps.find(Pkg.FullName()) != PackageOps.end()) + ++wannabeInstances; + if (multiArchInstances == false) + { + auto const V = Cache[Pkg].InstVerIter(Cache); + if (V.end() == false && (Pkg->CurrentVer == 0 || V != Pkg.CurrentVer())) + multiArchInstances = ((V->MultiArch & pkgCache::Version::Same) == pkgCache::Version::Same); + } + } + /* theoretically the installed check would be enough as some wannabe will + be first and hence be the crossgrade we were looking for, but #844300 + prevents this so we keep these situations explicit removes. + It is also the reason why neither of them can be a M-A:same package */ + if (installedInstances == 1 && wannabeInstances == 1 && multiArchInstances == false) + { + auto const FirstInstall = std::find_if_not(I, List.end(), + [](Item const &i) { return i.Op == Item::Remove || i.Op == Item::Purge; }); + auto const LastInstall = std::find_if_not(FirstInstall, List.end(), + [](Item const &i) { return i.Op == Item::Install; }); + auto const crosser = std::find_if(FirstInstall, LastInstall, + [&I](Item const &i) { return i.Pkg->Group == I->Pkg->Group; }); + if (crosser != LastInstall) + { + crossgraded.insert(I->Pkg->ID); + toCrossgrade.emplace_back(&(*I), crosser->Pkg.FullName()); + } + } + } + for (auto I = PlanedEnd; I != List.end(); ++I) + { + if (I->Op != Item::Remove && I->Op != Item::Purge) + continue; + + auto const Grp = I->Pkg.Group(); + for (auto Pkg = Grp.PackageList(); Pkg.end() == false; Pkg = Grp.NextPkg(Pkg)) + { + if (Pkg == I->Pkg || Cache[Pkg].Install() == false) + continue; + toCrossgrade.emplace_back(&(*I), Pkg.FullName()); + break; + } + } + for (auto C : toCrossgrade) + { + // we never do purges on packages which are crossgraded, even if "requested" + if (C.first->Op == Item::Purge) + { + C.first->Op = Item::Remove; // crossgrades should never be purged + auto && Purges = approvedStates.Purge(); + auto const Ver = std::find_if( +#if __GNUC__ >= 5 || (__GNUC_MINOR__ >= 9 && __GNUC__ >= 4) + Purges.cbegin(), Purges.cend(), +#else + Purges.begin(), Purges.end(), +#endif + [&C](pkgCache::VerIterator const &V) { return V.ParentPkg() == C.first->Pkg; }); + approvedStates.Remove(*Ver); + Purges.erase(Ver); + auto && RemOp = PackageOps[C.first->Pkg.FullName()]; + if (RemOp.size() == 4) + { + RemOp.erase(std::next(RemOp.begin(), 2), RemOp.end()); + PackagesTotal -= 2; + } + else + _error->Warning("Unexpected amount of planned ops for package %s: %lu", C.first->Pkg.FullName().c_str(), RemOp.size()); + } + } + if (crossgraded.empty() == false) + { + auto const oldsize = List.size(); + List.erase(std::remove_if(List.begin(), PlanedEnd, + [&crossgraded](Item const &i){ + return (i.Op == Item::Remove || i.Op == Item::Purge) && + crossgraded.find(i.Pkg->ID) != crossgraded.end(); + }), PlanedEnd); + explicitIdx -= (oldsize - List.size()); + } + } + + APT::StateChanges currentStates; + if (_config->FindB("dpkg::selection::current::saveandrestore", true)) + { + for (auto Pkg = Cache.PkgBegin(); Pkg.end() == false; ++Pkg) + if (Pkg->CurrentVer == 0) + continue; + else if (Pkg->SelectedState == pkgCache::State::Purge) + currentStates.Purge(FindToBeRemovedVersion(Pkg)); + else if (Pkg->SelectedState == pkgCache::State::DeInstall) + currentStates.Remove(FindToBeRemovedVersion(Pkg)); + if (currentStates.empty() == false) + { + APT::StateChanges cleanStates; + for (auto && P: currentStates.Remove()) + cleanStates.Install(P); + for (auto && P: currentStates.Purge()) + cleanStates.Install(P); + if (cleanStates.Save(false) == false) + return _error->Error("Couldn't clean the currently selected dpkg states"); + } + } + + if (_config->FindB("dpkg::selection::remove::approved", true)) + { + if (approvedStates.Save(false) == false) + { + _error->Error("Couldn't record the approved state changes as dpkg selection states"); + if (currentStates.Save(false) == false) + _error->Error("Couldn't restore dpkg selection states which were present before this interaction!"); + return false; + } + + List.erase(std::next(List.begin(), explicitIdx), List.end()); + + std::vector<bool> toBeRemoved(Cache.Head().PackageCount, false); + for (auto && I: approvedStates.Remove()) + toBeRemoved[I.ParentPkg()->ID] = true; + for (auto && I: approvedStates.Purge()) + toBeRemoved[I.ParentPkg()->ID] = true; + + for (auto && I: List) + if (I.Op == Item::Remove || I.Op == Item::Purge) + toBeRemoved[I.Pkg->ID] = false; + + bool const RemovePending = std::find(toBeRemoved.begin(), toBeRemoved.end(), true) != toBeRemoved.end(); + bool const PurgePending = approvedStates.Purge().empty() == false; + if (RemovePending != false || PurgePending != false) + List.emplace_back(Item::ConfigurePending, pkgCache::PkgIterator()); + if (RemovePending) + List.emplace_back(Item::RemovePending, pkgCache::PkgIterator()); + if (PurgePending) + List.emplace_back(Item::PurgePending, pkgCache::PkgIterator()); + + // support subpressing of triggers processing for special + // cases like d-i that runs the triggers handling manually + if (_config->FindB("DPkg::ConfigurePending", true)) + List.emplace_back(Item::ConfigurePending, pkgCache::PkgIterator()); + } + bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false); + + d->stdin_is_dev_null = false; + + // create log + OpenLog(); + + bool dpkgMultiArch = debSystem::SupportsMultiArch(); + + // start pty magic before the loop + StartPtyMagic(); + + // Tell the progress that its starting and fork dpkg + d->progress->Start(d->master); + + // this loop is runs once per dpkg operation + vector<Item>::const_iterator I = List.cbegin(); + while (I != List.end()) + { + // Do all actions with the same Op in one run + vector<Item>::const_iterator J = I; + if (TriggersPending == true) + for (; J != List.end(); ++J) + { + if (J->Op == I->Op) + continue; + if (J->Op != Item::TriggersPending) + break; + vector<Item>::const_iterator T = J + 1; + if (T != List.end() && T->Op == I->Op) + continue; + break; + } + else if (J->Op == Item::Remove || J->Op == Item::Purge) + J = std::find_if(J, List.cend(), [](Item const &I) { return I.Op != Item::Remove && I.Op != Item::Purge; }); + else + J = std::find_if(J, List.cend(), [&J](Item const &I) { return I.Op != J->Op; }); + + auto const size = (J - I) + 10; + + // start with the baseset of arguments + auto Size = StartSize; + Args.erase(Args.begin() + BaseArgs, Args.end()); + Args.reserve(size); + // keep track of allocated strings for multiarch package names + std::vector<char *> Packages(size, nullptr); + + int fd[2]; + if (pipe(fd) != 0) + return _error->Errno("pipe","Failed to create IPC pipe to dpkg"); + +#define ADDARG(X) Args.push_back(X); Size += strlen(X) +#define ADDARGC(X) Args.push_back(X); Size += sizeof(X) - 1 + + ADDARGC("--status-fd"); + char status_fd_buf[20]; + snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]); + ADDARG(status_fd_buf); + unsigned long const Op = I->Op; + + if (NoTriggers == true && I->Op != Item::TriggersPending && + (I->Op != Item::ConfigurePending || std::next(I) != List.end())) + { + ADDARGC("--no-triggers"); + } + + switch (I->Op) + { + case Item::Remove: + case Item::Purge: + ADDARGC("--force-depends"); + if (std::any_of(I, J, ItemIsEssential)) + { + ADDARGC("--force-remove-essential"); + } + ADDARGC("--remove"); + break; + + case Item::Configure: + ADDARGC("--configure"); + break; + + case Item::ConfigurePending: + ADDARGC("--configure"); + ADDARGC("--pending"); + break; + + case Item::TriggersPending: + ADDARGC("--triggers-only"); + ADDARGC("--pending"); + break; + + case Item::RemovePending: + ADDARGC("--remove"); + ADDARGC("--pending"); + break; + + case Item::PurgePending: + ADDARGC("--purge"); + ADDARGC("--pending"); + break; + + case Item::Install: + ADDARGC("--unpack"); + ADDARGC("--auto-deconfigure"); + break; + } + + char * tmpdir_to_free = nullptr; + + // Write in the file or package names + if (I->Op == Item::Install) + { + auto const installsToDo = J - I; + if (dpkg_recursive_install == true && dpkg_recursive_install_min < installsToDo) + { + std::string tmpdir; + strprintf(tmpdir, "%s/apt-dpkg-install-XXXXXX", GetTempDir().c_str()); + tmpdir_to_free = strndup(tmpdir.data(), tmpdir.length()); + if (mkdtemp(tmpdir_to_free) == nullptr) + return _error->Errno("DPkg::Go", "mkdtemp of %s failed in preparation of calling dpkg unpack", tmpdir_to_free); + + char p = 1; + for (auto c = installsToDo - 1; (c = c/10) != 0; ++p); + for (unsigned long n = 0; I != J; ++n, ++I) + { + if (I->File[0] != '/') + return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str()); + auto file = flNotDir(I->File); + if (flExtension(file) != "deb") + file.append(".deb"); + std::string linkpath; + if (dpkg_recursive_install_numbered) + strprintf(linkpath, "%s/%.*lu-%s", tmpdir_to_free, p, n, file.c_str()); + else + strprintf(linkpath, "%s/%s", tmpdir_to_free, file.c_str()); + if (symlink(I->File.c_str(), linkpath.c_str()) != 0) + return _error->Errno("DPkg::Go", "Symlinking %s to %s failed!", I->File.c_str(), linkpath.c_str()); + } + ADDARGC("--recursive"); + ADDARG(tmpdir_to_free); + } + else + { + for (;I != J && Size < MaxArgBytes; ++I) + { + if (I->File[0] != '/') + return _error->Error("Internal Error, Pathname to install is not absolute '%s'",I->File.c_str()); + Args.push_back(I->File.c_str()); + Size += I->File.length(); + } + } + } + else if (I->Op == Item::RemovePending) + { + ++I; + StripAlreadyDoneFrom(approvedStates.Remove()); + if (approvedStates.Remove().empty()) + continue; + } + else if (I->Op == Item::PurgePending) + { + ++I; + // explicit removes of packages without conffiles passthrough the purge states instantly, too. + // Setting these non-installed packages up for purging generates 'unknown pkg' warnings from dpkg + StripAlreadyDoneFrom(approvedStates.Purge()); + if (approvedStates.Purge().empty()) + continue; + std::remove_reference<decltype(approvedStates.Remove())>::type approvedRemoves; + std::swap(approvedRemoves, approvedStates.Remove()); + // we apply it again here as an explicit remove in the ordering will have cleared the purge state + if (approvedStates.Save(false) == false) + { + _error->Error("Couldn't record the approved purges as dpkg selection states"); + if (currentStates.Save(false) == false) + _error->Error("Couldn't restore dpkg selection states which were present before this interaction!"); + return false; + } + std::swap(approvedRemoves, approvedStates.Remove()); + } + else + { + string const nativeArch = _config->Find("APT::Architecture"); + unsigned long const oldSize = I->Pkg.end() == false ? Size : 0; + for (;I != J && Size < MaxArgBytes; ++I) + { + if((*I).Pkg.end() == true) + continue; + if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.FullName(true)) != disappearedPkgs.end()) + continue; + // We keep this here to allow "smooth" transitions from e.g. multiarch dpkg/ubuntu to dpkg/debian + if (dpkgMultiArch == false && (I->Pkg.Arch() == nativeArch || + strcmp(I->Pkg.Arch(), "all") == 0 || + strcmp(I->Pkg.Arch(), "none") == 0)) + { + char const * const name = I->Pkg.Name(); + ADDARG(name); + } + else + { + pkgCache::VerIterator PkgVer; + std::string name = I->Pkg.Name(); + if (Op == Item::Remove) + PkgVer = I->Pkg.CurrentVer(); + else if (Op == Item::Purge) + { + // we purge later with --purge --pending, so if it isn't installed (aka rc-only), skip it here + PkgVer = I->Pkg.CurrentVer(); + if (PkgVer.end() == true) + continue; + } + else + PkgVer = Cache[I->Pkg].InstVerIter(Cache); + if (strcmp(I->Pkg.Arch(), "none") == 0) + ; // never arch-qualify a package without an arch + else if (PkgVer.end() == false) + name.append(":").append(PkgVer.Arch()); + else + _error->Warning("Can not find PkgVer for '%s'", name.c_str()); + char * const fullname = strdup(name.c_str()); + Packages.push_back(fullname); + ADDARG(fullname); + } + } + // skip configure action if all scheduled packages disappeared + if (oldSize == Size) + continue; + } +#undef ADDARGC +#undef ADDARG + + J = I; + + if (noopDPkgInvocation == true) + { + for (std::vector<const char *>::const_iterator a = Args.begin(); + a != Args.end(); ++a) + clog << *a << ' '; + clog << endl; + for (std::vector<char *>::const_iterator p = Packages.begin(); + p != Packages.end(); ++p) + free(*p); + Packages.clear(); + close(fd[0]); + close(fd[1]); + cleanUpTmpDir(tmpdir_to_free); + continue; + } + Args.push_back(NULL); + + cout << flush; + clog << flush; + cerr << flush; + + /* Mask off sig int/quit. We do this because dpkg also does when + it forks scripts. What happens is that when you hit ctrl-c it sends + it to all processes in the group. Since dpkg ignores the signal + it doesn't die but we do! So we must also ignore it */ + sighandler_t old_SIGQUIT = signal(SIGQUIT,SIG_IGN); + sighandler_t old_SIGINT = signal(SIGINT,SigINT); + + // Check here for any SIGINT + if (pkgPackageManager::SigINTStop && (Op == Item::Remove || Op == Item::Purge || Op == Item::Install)) + break; + + // ignore SIGHUP as well (debian #463030) + sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN); + + // now run dpkg + d->progress->StartDpkg(); + std::set<int> KeepFDs; + KeepFDs.insert(fd[1]); + MergeKeepFdsFromConfiguration(KeepFDs); + pid_t Child = ExecFork(KeepFDs); + if (Child == 0) + { + // This is the child + SetupSlavePtyMagic(); + close(fd[0]); // close the read end of the pipe + + debSystem::DpkgChrootDirectory(); + + if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0) + _exit(100); + + if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO)) + { + int Flags; + int dummy = 0; + if ((Flags = fcntl(STDIN_FILENO,F_GETFL,dummy)) < 0) + _exit(100); + + // Discard everything in stdin before forking dpkg + if (fcntl(STDIN_FILENO,F_SETFL,Flags | O_NONBLOCK) < 0) + _exit(100); + + while (read(STDIN_FILENO,&dummy,1) == 1); + + if (fcntl(STDIN_FILENO,F_SETFL,Flags & (~(long)O_NONBLOCK)) < 0) + _exit(100); + } + + // if color support isn't enabled/disabled explicitly tell + // dpkg to use the same state apt is using for its color support + if (_config->FindB("APT::Color", false) == true) + setenv("DPKG_COLORS", "always", 0); + else + setenv("DPKG_COLORS", "never", 0); + + if (dynamic_cast<debSystem*>(_system) != nullptr + && dynamic_cast<debSystem*>(_system)->IsLocked() == true) { + setenv("DPKG_FRONTEND_LOCKED", "true", 1); + } + if (_config->Find("DPkg::Path", "").empty() == false) + setenv("PATH", _config->Find("DPkg::Path", "").c_str(), 1); + + execvp(Args[0], (char**) &Args[0]); + cerr << "Could not exec dpkg!" << endl; + _exit(100); + } + + // we read from dpkg here + int const _dpkgin = fd[0]; + close(fd[1]); // close the write end of the pipe + d->status_fd_reached_end_of_file = false; + + // apply ionice + if (_config->FindB("DPkg::UseIoNice", false) == true) + ionice(Child); + + // setups fds + sigemptyset(&d->sigmask); + sigprocmask(SIG_BLOCK,&d->sigmask,&d->original_sigmask); + + /* free vectors (and therefore memory) as we don't need the included data anymore */ + for (std::vector<char *>::const_iterator p = Packages.begin(); + p != Packages.end(); ++p) + free(*p); + Packages.clear(); + + // the result of the waitpid call + int Status = 0; + int res; + bool waitpid_failure = false; + bool dpkg_finished = false; + do + { + if (dpkg_finished == false) + { + if ((res = waitpid(Child, &Status, WNOHANG)) == Child) + dpkg_finished = true; + else if (res < 0) + { + // error handling, waitpid returned -1 + if (errno == EINTR) + continue; + waitpid_failure = true; + break; + } + } + if (dpkg_finished && d->status_fd_reached_end_of_file) + break; + + // wait for input or output here + FD_ZERO(&rfds); + if (d->master >= 0 && d->direct_stdin == false && d->stdin_is_dev_null == false) + FD_SET(STDIN_FILENO, &rfds); + FD_SET(_dpkgin, &rfds); + if(d->master >= 0) + FD_SET(d->master, &rfds); + tv.tv_sec = 0; + tv.tv_nsec = d->progress->GetPulseInterval(); + auto const select_ret = pselect(max(d->master, _dpkgin)+1, &rfds, NULL, NULL, + &tv, &d->original_sigmask); + d->progress->Pulse(); + if (select_ret == 0) + continue; + else if (select_ret < 0 && errno == EINTR) + continue; + else if (select_ret < 0) + { + perror("select() returned error"); + continue; + } + + if(d->master >= 0 && FD_ISSET(d->master, &rfds)) + DoTerminalPty(d->master); + if(d->master >= 0 && FD_ISSET(0, &rfds)) + DoStdin(d->master); + if(FD_ISSET(_dpkgin, &rfds)) + DoDpkgStatusFd(_dpkgin); + + } while (true); + close(_dpkgin); + + // Restore sig int/quit + signal(SIGQUIT,old_SIGQUIT); + signal(SIGINT,old_SIGINT); + signal(SIGHUP,old_SIGHUP); + + cleanUpTmpDir(tmpdir_to_free); + + if (waitpid_failure == true) + { + strprintf(d->dpkg_error, "Sub-process %s couldn't be waited for.",Args[0]); + _error->Error("%s", d->dpkg_error.c_str()); + break; + } + + // Check for an error code. + if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) + { + // if it was set to "keep-dpkg-running" then we won't return + // here but keep the loop going and just report it as a error + // for later + bool const stopOnError = _config->FindB("Dpkg::StopOnError",true); + + if (WIFSIGNALED(Status) != 0 && WTERMSIG(Status) == SIGSEGV) + strprintf(d->dpkg_error, "Sub-process %s received a segmentation fault.",Args[0]); + else if (WIFEXITED(Status) != 0) + strprintf(d->dpkg_error, "Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status)); + else + strprintf(d->dpkg_error, "Sub-process %s exited unexpectedly",Args[0]); + _error->Error("%s", d->dpkg_error.c_str()); + + if(stopOnError) + break; + } + } + // dpkg is done at this point + StopPtyMagic(); + CloseLog(); + + if (d->dpkg_error.empty() == false) + { + // no point in resetting packages we already completed removal for + StripAlreadyDoneFrom(approvedStates.Remove()); + StripAlreadyDoneFrom(approvedStates.Purge()); + APT::StateChanges undo; + auto && undoRem = approvedStates.Remove(); + std::move(undoRem.begin(), undoRem.end(), std::back_inserter(undo.Install())); + auto && undoPur = approvedStates.Purge(); + std::move(undoPur.begin(), undoPur.end(), std::back_inserter(undo.Install())); + approvedStates.clear(); + if (undo.Save(false) == false) + _error->Error("Couldn't revert dpkg selection for approved remove/purge after an error was encountered!"); + } + + StripAlreadyDoneFrom(currentStates.Remove()); + StripAlreadyDoneFrom(currentStates.Purge()); + if (currentStates.Save(false) == false) + _error->Error("Couldn't restore dpkg selection states which were present before this interaction!"); + + if (pkgPackageManager::SigINTStop) + _error->Warning(_("Operation was interrupted before it could finish")); + + if (noopDPkgInvocation == false) + { + if (d->dpkg_error.empty() && (PackagesDone + 1) != PackagesTotal) + { + std::string pkglist; + for (auto const &PO: PackageOps) + if (PO.second.size() != PackageOpsDone[PO.first]) + { + if (pkglist.empty() == false) + pkglist.append(" "); + pkglist.append(PO.first); + } + /* who cares about correct progress? As we depend on it for skipping actions + our parsing should be correct. People will no doubt be confused if they see + this message, but the dpkg warning about unknown packages isn't much better + from a user POV and combined we might have a chance to figure out what is wrong */ + _error->Warning("APT had planned for dpkg to do more than it reported back (%u vs %u).\n" + "Affected packages: %s", PackagesDone, PackagesTotal, pkglist.c_str()); + } + + std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache"); + if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true && + RemoveFile("pkgDPkgPM::Go", oldpkgcache)) + { + std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache"); + if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true) + { + _error->PushToStack(); + pkgCacheFile CacheFile; + CacheFile.BuildCaches(NULL, true); + _error->RevertToStack(); + } + } + } + + // disappearing packages can forward their auto-bit + if (disappearedPkgs.empty() == false) + Cache.writeStateFile(NULL); + + d->progress->Stop(); + + if (RunScripts("DPkg::Post-Invoke") == false) + return false; + + return d->dpkg_error.empty(); +} + +void SigINT(int /*sig*/) { + pkgPackageManager::SigINTStop = true; +} + /*}}}*/ +// pkgDpkgPM::Reset - Dump the contents of the command list /*{{{*/ +// --------------------------------------------------------------------- +/* */ +void pkgDPkgPM::Reset() +{ + List.erase(List.begin(),List.end()); +} + /*}}}*/ +// pkgDpkgPM::WriteApportReport - write out error report pkg failure /*{{{*/ +// --------------------------------------------------------------------- +/* */ +void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg) +{ + // If apport doesn't exist or isn't installed do nothing + // This e.g. prevents messages in 'universes' without apport + pkgCache::PkgIterator apportPkg = Cache.FindPkg("apport"); + if (apportPkg.end() == true || apportPkg->CurrentVer == 0) + return; + + string pkgname, reportfile, pkgver, arch; + string::size_type pos; + FILE *report; + + if (_config->FindB("Dpkg::ApportFailureReport", true) == false) + { + std::clog << "configured to not write apport reports" << std::endl; + return; + } + + // only report the first errors + if(pkgFailures > _config->FindI("APT::Apport::MaxReports", 3)) + { + std::clog << _("No apport report written because MaxReports is reached already") << std::endl; + return; + } + + // check if its not a follow up error + const char *needle = dgettext("dpkg", "dependency problems - leaving unconfigured"); + if(strstr(errormsg, needle) != NULL) { + std::clog << _("No apport report written because the error message indicates its a followup error from a previous failure.") << std::endl; + return; + } + + // do not report disk-full failures + if(strstr(errormsg, strerror(ENOSPC)) != NULL) { + std::clog << _("No apport report written because the error message indicates a disk full error") << std::endl; + return; + } + + // do not report out-of-memory failures + if(strstr(errormsg, strerror(ENOMEM)) != NULL || + strstr(errormsg, "failed to allocate memory") != NULL) { + std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl; + return; + } + + // do not report bugs regarding inaccessible local files + if(strstr(errormsg, strerror(ENOENT)) != NULL || + strstr(errormsg, "cannot access archive") != NULL) { + std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl; + return; + } + + // do not report errors encountered when decompressing packages + if(strstr(errormsg, "--fsys-tarfile returned error exit status 2") != NULL) { + std::clog << _("No apport report written because the error message indicates an issue on the local system") << std::endl; + return; + } + + // do not report dpkg I/O errors, this is a format string, so we compare + // the prefix and the suffix of the error with the dpkg error message + vector<string> io_errors; + io_errors.push_back(string("failed to read")); + io_errors.push_back(string("failed to write")); + io_errors.push_back(string("failed to seek")); + io_errors.push_back(string("unexpected end of file or stream")); + + for (vector<string>::iterator I = io_errors.begin(); I != io_errors.end(); ++I) + { + vector<string> list = VectorizeString(dgettext("dpkg", (*I).c_str()), '%'); + if (list.size() > 1) { + // we need to split %s, VectorizeString only allows char so we need + // to kill the "s" manually + if (list[1].size() > 1) { + list[1].erase(0, 1); + if(strstr(errormsg, list[0].c_str()) && + strstr(errormsg, list[1].c_str())) { + std::clog << _("No apport report written because the error message indicates a dpkg I/O error") << std::endl; + return; + } + } + } + } + + // get the pkgname and reportfile + pkgname = flNotDir(pkgpath); + pos = pkgname.find('_'); + if(pos != string::npos) + pkgname = pkgname.substr(0, pos); + + // find the package version and source package name + pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname); + if (Pkg.end() == true) + { + if (pos == std::string::npos || _config->FindB("dpkg::install::recursive::numbered", true) == false) + return; + auto const dash = pkgname.find_first_not_of("0123456789"); + if (dash == std::string::npos || pkgname[dash] != '-') + return; + pkgname.erase(0, dash + 1); + Pkg = Cache.FindPkg(pkgname); + if (Pkg.end() == true) + return; + } + pkgCache::VerIterator Ver = Cache.GetCandidateVersion(Pkg); + if (Ver.end() == true) + return; + pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr(); + + // if the file exists already, we check: + // - if it was reported already (touched by apport). + // If not, we do nothing, otherwise + // we overwrite it. This is the same behaviour as apport + // - if we have a report with the same pkgversion already + // then we skip it + _config->CndSet("Dir::Apport", "var/crash"); + reportfile = flCombine(_config->FindDir("Dir::Apport", "var/crash"), pkgname+".0.crash"); + if(FileExists(reportfile)) + { + struct stat buf; + char strbuf[255]; + + // check atime/mtime + stat(reportfile.c_str(), &buf); + if(buf.st_mtime > buf.st_atime) + return; + + // check if the existing report is the same version + report = fopen(reportfile.c_str(),"r"); + while(fgets(strbuf, sizeof(strbuf), report) != NULL) + { + if(strstr(strbuf,"Package:") == strbuf) + { + char pkgname[255], version[255]; + if(sscanf(strbuf, "Package: %254s %254s", pkgname, version) == 2) + if(strcmp(pkgver.c_str(), version) == 0) + { + fclose(report); + return; + } + } + } + fclose(report); + } + + // now write the report + arch = _config->Find("APT::Architecture"); + report = fopen(reportfile.c_str(),"w"); + if(report == NULL) + return; + if(_config->FindB("DPkgPM::InitialReportOnly",false) == true) + chmod(reportfile.c_str(), 0); + else + chmod(reportfile.c_str(), 0600); + fprintf(report, "ProblemType: Package\n"); + fprintf(report, "Architecture: %s\n", arch.c_str()); + time_t now = time(NULL); + char ctime_buf[26]; // need at least 26 bytes according to ctime(3) + fprintf(report, "Date: %s" , ctime_r(&now, ctime_buf)); + fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str()); + fprintf(report, "SourcePackage: %s\n", Ver.SourcePkgName()); + fprintf(report, "ErrorMessage:\n %s\n", errormsg); + + // ensure that the log is flushed + if(d->term_out) + fflush(d->term_out); + + // attach terminal log it if we have it + string logfile_name = _config->FindFile("Dir::Log::Terminal", "/dev/null"); + if (logfile_name != "/dev/null") + { + FILE *log = NULL; + + fprintf(report, "DpkgTerminalLog:\n"); + log = fopen(logfile_name.c_str(),"r"); + if(log != NULL) + { + char buf[1024]; + while( fgets(buf, sizeof(buf), log) != NULL) + fprintf(report, " %s", buf); + fprintf(report, " \n"); + fclose(log); + } + } + + // attach history log it if we have it + string histfile_name = _config->FindFile("Dir::Log::History", "/dev/null"); + if (histfile_name != "/dev/null") + { + fprintf(report, "DpkgHistoryLog:\n"); + FILE* log = fopen(histfile_name.c_str(),"r"); + if(log != NULL) + { + char buf[1024]; + while( fgets(buf, sizeof(buf), log) != NULL) + fprintf(report, " %s", buf); + fclose(log); + } + } + + // log the ordering, see dpkgpm.h and the "Ops" enum there + fprintf(report, "AptOrdering:\n"); + for (auto && I : List) + { + char const * opstr = nullptr; + switch (I.Op) + { + case Item::Install: opstr = "Install"; break; + case Item::Configure: opstr = "Configure"; break; + case Item::Remove: opstr = "Remove"; break; + case Item::Purge: opstr = "Purge"; break; + case Item::ConfigurePending: opstr = "ConfigurePending"; break; + case Item::TriggersPending: opstr = "TriggersPending"; break; + case Item::RemovePending: opstr = "RemovePending"; break; + case Item::PurgePending: opstr = "PurgePending"; break; + } + auto const pkgname = I.Pkg.end() ? "NULL" : I.Pkg.FullName(); + fprintf(report, " %s: %s\n", pkgname.c_str(), opstr); + } + + // attach dmesg log (to learn about segfaults) + if (FileExists("/bin/dmesg")) + { + fprintf(report, "Dmesg:\n"); + FILE *log = popen("/bin/dmesg","r"); + if(log != NULL) + { + char buf[1024]; + while( fgets(buf, sizeof(buf), log) != NULL) + fprintf(report, " %s", buf); + pclose(log); + } + } + + // attach df -l log (to learn about filesystem status) + if (FileExists("/bin/df")) + { + + fprintf(report, "Df:\n"); + FILE *log = popen("/bin/df -l","r"); + if(log != NULL) + { + char buf[1024]; + while( fgets(buf, sizeof(buf), log) != NULL) + fprintf(report, " %s", buf); + pclose(log); + } + } + + fclose(report); + +} + /*}}}*/ |