// -*- mode: cpp; mode: fold -*- // Description /*{{{*/ // $Id: dpkgpm.cc,v 1.28 2004/01/27 02:25:01 mdz Exp $ /* ###################################################################### DPKG Package Manager - Provide an interface to dpkg ##################################################################### */ /*}}}*/ // Includes /*{{{*/ #include <config.h> #include <apt-pkg/dpkgpm.h> #include <apt-pkg/error.h> #include <apt-pkg/configuration.h> #include <apt-pkg/depcache.h> #include <apt-pkg/pkgrecords.h> #include <apt-pkg/strutl.h> #include <apt-pkg/fileutl.h> #include <apt-pkg/cachefile.h> #include <apt-pkg/packagemanager.h> #include <unistd.h> #include <stdlib.h> #include <fcntl.h> #include <sys/select.h> #include <sys/stat.h> #include <sys/types.h> #include <sys/wait.h> #include <signal.h> #include <errno.h> #include <string.h> #include <stdio.h> #include <string.h> #include <algorithm> #include <sstream> #include <map> #include <pwd.h> #include <grp.h> #include <termios.h> #include <unistd.h> #include <sys/ioctl.h> #include <pty.h> #include <apti18n.h> /*}}}*/ using namespace std; class pkgDPkgPMPrivate { public: pkgDPkgPMPrivate() : dpkgbuf_pos(0), term_out(NULL), history_out(NULL) { } bool stdin_is_dev_null; // the buffer we use for the dpkg status-fd reading char dpkgbuf[1024]; int dpkgbuf_pos; FILE *term_out; FILE *history_out; string dpkg_error; }; 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_("Installing %s")), std::make_pair("configure", N_("Configuring %s")), std::make_pair("remove", N_("Removing %s")), std::make_pair("purge", N_("Completely removing %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: 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; } }; } /* 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"); } // DPkgPM::pkgDPkgPM - Constructor /*{{{*/ // --------------------------------------------------------------------- /* */ pkgDPkgPM::pkgDPkgPM(pkgDepCache *Cache) : pkgPackageManager(Cache), PackagesDone(0), PackagesTotal(0) { d = new pkgDPkgPMPrivate(); } /*}}}*/ // 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.Name()); // 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::SendV2Pkgs - Send version 2 package info /*{{{*/ // --------------------------------------------------------------------- /* 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) { fprintf(F,"VERSION 2\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 if (I->Pkg->CurrentVer == 0) fprintf(F,"- "); else fprintf(F,"%s ",I->Pkg.CurrentVer().VerStr()); // Show the compare operator // Target version if (S.InstallVer != 0) { int Comp = 2; if (I->Pkg->CurrentVer != 0) Comp = S.InstVerIter(Cache).CompareVer(I->Pkg.CurrentVer()); if (Comp < 0) fprintf(F,"> "); if (Comp == 0) fprintf(F,"= "); if (Comp > 0) fprintf(F,"< "); fprintf(F,"%s ",S.InstVerIter(Cache).VerStr()); } else fprintf(F,"> - "); // 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()); } if (I->Op == Item::Configure) fprintf(F,"**CONFIGURE**\n"); 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) { Configuration::Item const *Opts = _config->Tree(Cnf); if (Opts == 0 || Opts->Child == 0) return true; Opts = Opts->Child; unsigned int Count = 1; for (; Opts != 0; Opts = Opts->Next, Count++) { if (Opts->Value.empty() == true) continue; // 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); // Create the pipes int Pipes[2]; if (pipe(Pipes) != 0) return _error->Errno("pipe","Failed to create IPC pipe to subprocess"); SetCloseExec(Pipes[0],true); SetCloseExec(Pipes[1],true); // Purified Fork for running the script pid_t Process = ExecFork(); if (Process == 0) { // Setup the FDs dup2(Pipes[0],STDIN_FILENO); SetCloseExec(STDOUT_FILENO,false); SetCloseExec(STDIN_FILENO,false); SetCloseExec(STDERR_FILENO,false); if (_config->FindDir("DPkg::Chroot-Directory","/") != "/") { std::cerr << "Chrooting into " << _config->FindDir("DPkg::Chroot-Directory") << std::endl; if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0) _exit(100); } 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) return _error->Errno("fdopen","Faild to open new FD"); // 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 SendV2Pkgs(F); fclose(F); // Clean up the sub process if (ExecWait(Process,Opts->Value.c_str()) == false) return _error->Error("Failure running script %s",Opts->Value.c_str()); } return true; } /*}}}*/ // DPkgPM::DoStdin - Read stdin and pass to slave pty /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDPkgPM::DoStdin(int master) { unsigned char input_buf[256] = {0,}; ssize_t len = read(0, input_buf, sizeof(input_buf)); if (len) 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; write(1, term_buf, len); if(d->term_out) fwrite(term_buf, len, sizeof(char), d->term_out); } /*}}}*/ // DPkgPM::ProcessDpkgStatusBuf /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line) { bool const Debug = _config->FindB("Debug::pkgDPkgProgressReporting",false); // the status we output ostringstream status; if (Debug == true) std::clog << "got from dpkg '" << line << "'" << std::endl; /* dpkg sends strings like this: 'status: <pkg>: <pkg qstate>' 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: conffile-prompt: conffile : 'current-conffile' 'new-conffile' useredited distedited Newer versions of dpkg sent also: 'processing: install: pkg' 'processing: configure: pkg' 'processing: remove: pkg' 'processing: purge: pkg' 'processing: disappear: pkg' 'processing: trigproc: trigger' */ char* list[6]; // dpkg sends multiline error messages sometimes (see // #374195 for a example. we should support this by // either patching dpkg to not send multiline over the // statusfd or by rewriting the code here to deal with // it. for now we just ignore it and not crash TokSplitString(':', line, list, sizeof(list)/sizeof(list[0])); if( list[0] == NULL || list[1] == NULL || list[2] == NULL) { if (Debug == true) std::clog << "ignoring line: not enough ':'" << std::endl; return; } const char* const pkg = list[1]; const char* action = _strstrip(list[2]); // 'processing' from dpkg looks like // 'processing: action: pkg' if(strncmp(list[0], "processing", strlen("processing")) == 0) { char s[200]; const char* const pkg_or_trigger = _strstrip(list[2]); action = _strstrip( list[1]); const std::pair<const char *, const char *> * const iter = std::find_if(PackageProcessingOpsBegin, PackageProcessingOpsEnd, MatchProcessingOp(action)); if(iter == PackageProcessingOpsEnd) { if (Debug == true) std::clog << "ignoring unknown action: " << action << std::endl; return; } snprintf(s, sizeof(s), _(iter->second), pkg_or_trigger); status << "pmstatus:" << pkg_or_trigger << ":" << (PackagesDone/float(PackagesTotal)*100.0) << ":" << s << endl; if(OutStatusFd > 0) write(OutStatusFd, status.str().c_str(), status.str().size()); if (Debug == true) std::clog << "send: '" << status.str() << "'" << endl; if (strncmp(action, "disappear", strlen("disappear")) == 0) handleDisappearAction(pkg_or_trigger); return; } if(strncmp(action,"error",strlen("error")) == 0) { // urgs, sometime has ":" in its error string so that we // end up with the error message split between list[3] // and list[4], e.g. the message: // "failed in buffer_write(fd) (10, ret=-1): backend dpkg-deb ..." // concat them again if( list[4] != NULL ) list[3][strlen(list[3])] = ':'; status << "pmerror:" << list[1] << ":" << (PackagesDone/float(PackagesTotal)*100.0) << ":" << list[3] << endl; if(OutStatusFd > 0) write(OutStatusFd, status.str().c_str(), status.str().size()); if (Debug == true) std::clog << "send: '" << status.str() << "'" << endl; pkgFailures++; WriteApportReport(list[1], list[3]); return; } else if(strncmp(action,"conffile",strlen("conffile")) == 0) { status << "pmconffile:" << list[1] << ":" << (PackagesDone/float(PackagesTotal)*100.0) << ":" << list[3] << endl; if(OutStatusFd > 0) write(OutStatusFd, status.str().c_str(), status.str().size()); if (Debug == true) std::clog << "send: '" << status.str() << "'" << endl; return; } vector<struct DpkgState> const &states = PackageOps[pkg]; const char *next_action = NULL; if(PackageOpsDone[pkg] < states.size()) next_action = states[PackageOpsDone[pkg]].state; // check if the package moved to the next dpkg state if(next_action && (strcmp(action, next_action) == 0)) { // only read the translation if there is actually a next // action const char *translation = _(states[PackageOpsDone[pkg]].str); char s[200]; snprintf(s, sizeof(s), translation, pkg); // we moved from one dpkg state to a new one, report that PackageOpsDone[pkg]++; PackagesDone++; // build the status str status << "pmstatus:" << pkg << ":" << (PackagesDone/float(PackagesTotal)*100.0) << ":" << s << endl; if(OutStatusFd > 0) write(OutStatusFd, status.str().c_str(), status.str().size()); if (Debug == true) std::clog << "send: '" << status.str() << "'" << endl; } if (Debug == true) std::clog << "(parsed from dpkg) pkg: " << pkg << " action: " << action << endl; } /*}}}*/ // DPkgPM::handleDisappearAction /*{{{*/ void pkgDPkgPM::handleDisappearAction(string const &pkgname) { // record the package name for display and stuff later disappearedPkgs.insert(pkgname); pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname); if (unlikely(Pkg.end() == true)) return; // 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; } } } /*}}}*/ // DPkgPM::DoDpkgStatusFd /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd) { char *p, *q; int len; len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos); d->dpkgbuf_pos += len; if(len <= 0) return; // process line by line if we have a buffer p = q = d->dpkgbuf; while((q=(char*)memchr(p, '\n', d->dpkgbuf+d->dpkgbuf_pos-p)) != NULL) { *q = 0; ProcessDpkgStatusLine(OutStatusFd, p); p=q+1; // continue with next line } // now move the unprocessed bits (after the final \n that is now a 0x0) // to the start and update d->dpkgbuf_pos p = (char*)memrchr(d->dpkgbuf, 0, d->dpkgbuf_pos); if(p == NULL) return; // we are interessted in the first char *after* 0x0 p++; // 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 logdir = _config->FindDir("Dir::Log"); 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 const * const tmp = localtime(&t); strftime(timestr, sizeof(timestr), "%F %T", tmp); // open terminal log string const logfile_name = flCombine(logdir, _config->Find("Dir::Log::Terminal")); if (!logfile_name.empty()) { 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); struct passwd *pw; struct group *gr; pw = getpwnam("root"); gr = getgrnam("adm"); if (pw != NULL && gr != NULL) chown(logfile_name.c_str(), pw->pw_uid, gr->gr_gid); chmod(logfile_name.c_str(), 0644); fprintf(d->term_out, "\nLog started: %s\n", timestr); } // write your history string const history_name = flCombine(logdir, _config->Find("Dir::Log::History")); if (!history_name.empty()) { 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()); 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")); 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 *tmp = localtime(&t); 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; } /*}}}*/ /*{{{*/ // This implements a racy version of pselect for those architectures // that don't have a working implementation. // FIXME: Probably can be removed on Lenny+1 static int racy_pselect(int nfds, fd_set *readfds, fd_set *writefds, fd_set *exceptfds, const struct timespec *timeout, const sigset_t *sigmask) { sigset_t origmask; struct timeval tv; int retval; tv.tv_sec = timeout->tv_sec; tv.tv_usec = timeout->tv_nsec/1000; sigprocmask(SIG_SETMASK, sigmask, &origmask); retval = select(nfds, readfds, writefds, exceptfds, &tv); sigprocmask(SIG_SETMASK, &origmask, 0); return retval; } /*}}}*/ // DPkgPM::Go - Run the sequence /*{{{*/ // --------------------------------------------------------------------- /* This globs the operations and calls dpkg * * If it is called with "OutStatusFd" set to a valid file descriptor * apt will report the install progress over this fd. It maps the * dpkg states a package goes through to human readable (and i10n-able) * names and calculates a percentage for each step. */ bool pkgDPkgPM::Go(int OutStatusFd) { // Generate the base argument list for dpkg std::vector<const char *> Args; unsigned long StartSize = 0; string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg"); Args.push_back(Tmp.c_str()); StartSize += Tmp.length(); // Stick in any custom dpkg options Configuration::Item const *Opts = _config->Tree("DPkg::Options"); if (Opts != 0) { Opts = Opts->Child; for (; Opts != 0; Opts = Opts->Next) { if (Opts->Value.empty() == true) continue; Args.push_back(Opts->Value.c_str()); StartSize += Opts->Value.length(); } } size_t const BaseArgs = Args.size(); // we need to detect if we can qualify packages with the architecture or not Args.push_back("--assert-multi-arch"); Args.push_back(NULL); pid_t dpkgAssertMultiArch = ExecFork(); if (dpkgAssertMultiArch == 0) { // redirect everything to the ultimate sink as we only need the exit-status int const nullfd = open("/dev/null", O_RDONLY); dup2(nullfd, STDIN_FILENO); dup2(nullfd, STDOUT_FILENO); dup2(nullfd, STDERR_FILENO); execv(Args[0], (char**) &Args[0]); _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!"); _exit(2); } fd_set rfds; struct timespec tv; sigset_t sigmask; sigset_t original_sigmask; unsigned int const MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024); unsigned int const MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024); bool const NoTriggers = _config->FindB("DPkg::NoTriggers", false); if (RunScripts("DPkg::Pre-Invoke") == false) return false; if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false) return false; // support subpressing of triggers processing for special // cases like d-i that runs the triggers handling manually bool const SmartConf = (_config->Find("PackageManager::Configure", "all") != "all"); bool const TriggersPending = _config->FindB("DPkg::TriggersPending", false); if (_config->FindB("DPkg::ConfigurePending", SmartConf) == true) List.push_back(Item(Item::ConfigurePending, PkgIterator())); // map the dpkg states to the operations that are performed // (this is sorted in the same way as Item::Ops) static const struct DpkgState DpkgStatesOpMap[][7] = { // Install operation { {"half-installed", N_("Preparing %s")}, {"unpacked", N_("Unpacking %s") }, {NULL, NULL} }, // Configure operation { {"unpacked",N_("Preparing to configure %s") }, {"half-configured", N_("Configuring %s") }, { "installed", N_("Installed %s")}, {NULL, NULL} }, // Remove operation { {"half-configured", N_("Preparing for removal of %s")}, {"half-installed", N_("Removing %s")}, {"config-files", N_("Removed %s")}, {NULL, NULL} }, // Purge operation { {"config-files", N_("Preparing to completely remove %s")}, {"not-installed", N_("Completely removed %s")}, {NULL, NULL} }, }; // 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 (vector<Item>::const_iterator I = List.begin(); I != List.end(); ++I) { if((*I).Pkg.end() == true) continue; string const name = (*I).Pkg.Name(); PackageOpsDone[name] = 0; for(int i=0; (DpkgStatesOpMap[(*I).Op][i]).state != NULL; ++i) { PackageOps[name].push_back(DpkgStatesOpMap[(*I).Op][i]); PackagesTotal++; } } d->stdin_is_dev_null = false; // create log OpenLog(); bool dpkgMultiArch = false; if (dpkgAssertMultiArch > 0) { int Status = 0; while (waitpid(dpkgAssertMultiArch, &Status, 0) != dpkgAssertMultiArch) { if (errno == EINTR) continue; _error->WarningE("dpkgGo", _("Waited for %s but it wasn't there"), "dpkg --assert-multi-arch"); break; } if (WIFEXITED(Status) == true && WEXITSTATUS(Status) == 0) dpkgMultiArch = true; } // this loop is runs once per operation for (vector<Item>::const_iterator I = List.begin(); 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 for (; J != List.end() && J->Op == I->Op; ++J) /* nothing */; // keep track of allocated strings for multiarch package names std::vector<char *> Packages; // start with the baseset of arguments unsigned long Size = StartSize; Args.erase(Args.begin() + BaseArgs, Args.end()); // Now check if we are within the MaxArgs limit // // this code below is problematic, because it may happen that // the argument list is split in a way that A depends on B // and they are in the same "--configure A B" run // - with the split they may now be configured in different // runs, using Immediate-Configure-All can help prevent this. if (J - I > (signed)MaxArgs) { J = I + MaxArgs; unsigned long const size = MaxArgs + 10; Args.reserve(size); Packages.reserve(size); } else { unsigned long const size = (J - I) + 10; Args.reserve(size); Packages.reserve(size); } int fd[2]; pipe(fd); #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; switch (I->Op) { case Item::Remove: ADDARGC("--force-depends"); ADDARGC("--force-remove-essential"); ADDARGC("--remove"); break; case Item::Purge: ADDARGC("--force-depends"); ADDARGC("--force-remove-essential"); ADDARGC("--purge"); 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::Install: ADDARGC("--unpack"); ADDARGC("--auto-deconfigure"); break; } if (NoTriggers == true && I->Op != Item::TriggersPending && I->Op != Item::ConfigurePending) { ADDARGC("--no-triggers"); } #undef ADDARGC // Write in the file or package names if (I->Op == Item::Install) { 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 { string const nativeArch = _config->Find("APT::Architecture"); unsigned long const oldSize = I->Op == Item::Configure ? Size : 0; for (;I != J && Size < MaxArgBytes; ++I) { if((*I).Pkg.end() == true) continue; if (I->Op == Item::Configure && disappearedPkgs.find(I->Pkg.Name()) != 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"))) { char const * const name = I->Pkg.Name(); ADDARG(name); } else { pkgCache::VerIterator PkgVer; std::string name = I->Pkg.Name(); if (Op == Item::Remove || Op == Item::Purge) PkgVer = I->Pkg.CurrentVer(); else PkgVer = Cache[I->Pkg].InstVerIter(Cache); name.append(":").append(PkgVer.Arch()); char * const fullname = strdup(name.c_str()); Packages.push_back(fullname); ADDARG(fullname); } } // skip configure action if all sheduled packages disappeared if (oldSize == Size) continue; } #undef ADDARG J = I; if (_config->FindB("Debug::pkgDPkgPM",false) == true) { for (std::vector<const char *>::const_iterator a = Args.begin(); a != Args.end(); ++a) clog << *a << ' '; clog << endl; 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); struct termios tt; struct winsize win; int master = -1; int slave = -1; // if tcgetattr does not return zero there was a error // and we do not do any pty magic if (tcgetattr(0, &tt) == 0) { ioctl(0, TIOCGWINSZ, (char *)&win); if (openpty(&master, &slave, NULL, &tt, &win) < 0) { const char *s = _("Can not write log, openpty() " "failed (/dev/pts not mounted?)\n"); fprintf(stderr, "%s",s); if(d->term_out) fprintf(d->term_out, "%s",s); master = slave = -1; } else { struct termios rtt; rtt = tt; cfmakeraw(&rtt); rtt.c_lflag &= ~ECHO; rtt.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(&sigmask); sigaddset(&sigmask, SIGTTOU); sigprocmask(SIG_BLOCK,&sigmask, &original_sigmask); tcsetattr(0, TCSAFLUSH, &rtt); sigprocmask(SIG_SETMASK, &original_sigmask, 0); } } // Fork dpkg pid_t Child; _config->Set("APT::Keep-Fds::",fd[1]); // send status information that we are about to fork dpkg if(OutStatusFd > 0) { ostringstream status; status << "pmstatus:dpkg-exec:" << (PackagesDone/float(PackagesTotal)*100.0) << ":" << _("Running dpkg") << endl; write(OutStatusFd, status.str().c_str(), status.str().size()); } Child = ExecFork(); // This is the child if (Child == 0) { if(slave >= 0 && master >= 0) { setsid(); ioctl(slave, TIOCSCTTY, 0); close(master); dup2(slave, 0); dup2(slave, 1); dup2(slave, 2); close(slave); } close(fd[0]); // close the read end of the pipe if (_config->FindDir("DPkg::Chroot-Directory","/") != "/") { std::cerr << "Chrooting into " << _config->FindDir("DPkg::Chroot-Directory") << std::endl; if (chroot(_config->FindDir("DPkg::Chroot-Directory","/").c_str()) != 0) _exit(100); } if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0) _exit(100); if (_config->FindB("DPkg::FlushSTDIN",true) == true && isatty(STDIN_FILENO)) { int Flags,dummy; 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); } /* No Job Control Stop Env is a magic dpkg var that prevents it from using sigstop */ putenv((char *)"DPKG_NO_TSTP=yes"); execvp(Args[0], (char**) &Args[0]); cerr << "Could not exec dpkg!" << endl; _exit(100); } // apply ionice if (_config->FindB("DPkg::UseIoNice", false) == true) ionice(Child); // clear the Keep-Fd again _config->Clear("APT::Keep-Fds",fd[1]); // Wait for dpkg int Status = 0; // we read from dpkg here int const _dpkgin = fd[0]; close(fd[1]); // close the write end of the pipe if(slave > 0) close(slave); // setups fds sigemptyset(&sigmask); sigprocmask(SIG_BLOCK,&sigmask,&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 res; int select_ret; while ((res=waitpid(Child,&Status, WNOHANG)) != Child) { if(res < 0) { // FIXME: move this to a function or something, looks ugly here // error handling, waitpid returned -1 if (errno == EINTR) continue; RunScripts("DPkg::Post-Invoke"); // Restore sig int/quit signal(SIGQUIT,old_SIGQUIT); signal(SIGINT,old_SIGINT); signal(SIGHUP,old_SIGHUP); return _error->Errno("waitpid","Couldn't wait for subprocess"); } // wait for input or output here FD_ZERO(&rfds); if (master >= 0 && !d->stdin_is_dev_null) FD_SET(0, &rfds); FD_SET(_dpkgin, &rfds); if(master >= 0) FD_SET(master, &rfds); tv.tv_sec = 1; tv.tv_nsec = 0; select_ret = pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL, &tv, &original_sigmask); if (select_ret < 0 && (errno == EINVAL || errno == ENOSYS)) select_ret = racy_pselect(max(master, _dpkgin)+1, &rfds, NULL, NULL, &tv, &original_sigmask); if (select_ret == 0) continue; else if (select_ret < 0 && errno == EINTR) continue; else if (select_ret < 0) { perror("select() returned error"); continue; } if(master >= 0 && FD_ISSET(master, &rfds)) DoTerminalPty(master); if(master >= 0 && FD_ISSET(0, &rfds)) DoStdin(master); if(FD_ISSET(_dpkgin, &rfds)) DoDpkgStatusFd(_dpkgin, OutStatusFd); } close(_dpkgin); // Restore sig int/quit signal(SIGQUIT,old_SIGQUIT); signal(SIGINT,old_SIGINT); signal(SIGHUP,old_SIGHUP); if(master >= 0) { tcsetattr(0, TCSAFLUSH, &tt); close(master); } // Check for an error code. if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) { // if it was set to "keep-dpkg-runing" 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(stopOnError) RunScripts("DPkg::Post-Invoke"); 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]); if(d->dpkg_error.size() > 0) _error->Error("%s", d->dpkg_error.c_str()); if(stopOnError) { CloseLog(); return false; } } } CloseLog(); if (pkgPackageManager::SigINTStop) _error->Warning(_("Operation was interrupted before it could finish")); if (RunScripts("DPkg::Post-Invoke") == false) return false; if (_config->FindB("Debug::pkgDPkgPM",false) == false) { std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache"); if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true && unlink(oldpkgcache.c_str()) == 0) { 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(); } } } Cache.writeStateFile(NULL); return true; } void SigINT(int sig) { if (_config->FindB("APT::Immediate-Configure-All",false)) 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) { string pkgname, reportfile, srcpkgname, pkgver, arch; string::size_type pos; FILE *report; if (_config->FindB("Dpkg::ApportFailureReport", false) == 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) { std::clog << _("No apport report written because the error message indicates a out of memory error") << std::endl; return; } // do not report dpkg I/O errors // XXX - this message is localized, but this only matches the English version. This is better than nothing. if(strstr(errormsg, "short read in buffer_copy (")) { 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 versin and source package name pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname); if (Pkg.end() == true) return; pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg); if (Ver.end() == true) return; pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr(); pkgRecords Recs(Cache); pkgRecords::Parser &Parse = Recs.Lookup(Ver.FileList()); srcpkgname = Parse.SourcePkg(); if(srcpkgname.empty()) srcpkgname = pkgname; // 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 reportfile = flCombine("/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: %s %s", 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); fprintf(report, "Date: %s" , ctime(&now)); fprintf(report, "Package: %s %s\n", pkgname.c_str(), pkgver.c_str()); fprintf(report, "SourcePackage: %s\n", srcpkgname.c_str()); 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"); if (!logfile_name.empty()) { FILE *log = NULL; char buf[1024]; fprintf(report, "DpkgTerminalLog:\n"); log = fopen(logfile_name.c_str(),"r"); if(log != NULL) { while( fgets(buf, sizeof(buf), log) != NULL) fprintf(report, " %s", buf); fclose(log); } } // log the ordering const char *ops_str[] = {"Install", "Configure","Remove","Purge"}; fprintf(report, "AptOrdering:\n"); for (vector<Item>::iterator I = List.begin(); I != List.end(); ++I) fprintf(report, " %s: %s\n", (*I).Pkg.Name(), ops_str[(*I).Op]); // attach dmesg log (to learn about segfaults) if (FileExists("/bin/dmesg")) { FILE *log = NULL; char buf[1024]; fprintf(report, "Dmesg:\n"); log = popen("/bin/dmesg","r"); if(log != NULL) { 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")) { FILE *log = NULL; char buf[1024]; fprintf(report, "Df:\n"); log = popen("/bin/df -l","r"); if(log != NULL) { while( fgets(buf, sizeof(buf), log) != NULL) fprintf(report, " %s", buf); pclose(log); } } fclose(report); } /*}}}*/