// -*- 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 <apt-pkg/dpkgpm.h> #include <apt-pkg/error.h> #include <apt-pkg/configuration.h> #include <apt-pkg/depcache.h> #include <apt-pkg/strutl.h> #include <apti18n.h> #include <apt-pkg/fileutl.h> #include <unistd.h> #include <stdlib.h> #include <fcntl.h> #include <sys/select.h> #include <sys/types.h> #include <sys/wait.h> #include <signal.h> #include <errno.h> #include <stdio.h> #include <string.h> #include <algorithm> #include <sstream> #include <map> #include <termios.h> #include <unistd.h> #include <sys/ioctl.h> #include <pty.h> #include <config.h> #include <apti18n.h> /*}}}*/ using namespace std; 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("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), dpkgbuf_pos(0), term_out(NULL), PackagesDone(0), PackagesTotal(0) { } /*}}}*/ // DPkgPM::pkgDPkgPM - Destructor /*{{{*/ // --------------------------------------------------------------------- /* */ pkgDPkgPM::~pkgDPkgPM() { } /*}}}*/ // 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()); 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); 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. bool Die = false; 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) { Die = true; break; } } } else Die = !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 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 usleep(500000); return; } if(len <= 0) return; write(1, term_buf, len); if(term_out) fwrite(term_buf, len, sizeof(char), 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' - but for apt is it a ignored "unknown" action 'processing: trigproc: trigger' */ char* list[5]; // 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; return; } if(strncmp(action,"error",strlen("error")) == 0) { 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; 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::DoDpkgStatusFd /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd) { char *p, *q; int len; len=read(statusfd, &dpkgbuf[dpkgbuf_pos], sizeof(dpkgbuf)-dpkgbuf_pos); dpkgbuf_pos += len; if(len <= 0) return; // process line by line if we have a buffer p = q = dpkgbuf; while((q=(char*)memchr(p, '\n', dpkgbuf+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 dpkgbuf_pos p = (char*)memrchr(dpkgbuf, 0, 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(dpkgbuf, p, p-dpkgbuf); dpkgbuf_pos = dpkgbuf+dpkgbuf_pos-p; } /*}}}*/ // DPkgPM::OpenLog /*{{{*/ bool pkgDPkgPM::OpenLog() { string logdir = _config->FindDir("Dir::Log"); if(not FileExists(logdir)) return _error->Error(_("Directory '%s' missing"), logdir.c_str()); string logfile_name = flCombine(logdir, _config->Find("Dir::Log::Terminal")); if (!logfile_name.empty()) { term_out = fopen(logfile_name.c_str(),"a"); chmod(logfile_name.c_str(), 0600); // output current time char outstr[200]; time_t t = time(NULL); struct tm *tmp = localtime(&t); strftime(outstr, sizeof(outstr), "%F %T", tmp); fprintf(term_out, "\nLog started: "); fprintf(term_out, "%s", outstr); fprintf(term_out, "\n"); } return true; } /*}}}*/ // DPkg::CloseLog /*{{{*/ bool pkgDPkgPM::CloseLog() { if(term_out) { char outstr[200]; time_t t = time(NULL); struct tm *tmp = localtime(&t); strftime(outstr, sizeof(outstr), "%F %T", tmp); fprintf(term_out, "Log ended: "); fprintf(term_out, "%s", outstr); fprintf(term_out, "\n"); fclose(term_out); } term_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) { 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"); 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++; } } stdin_is_dev_null = false; // create log OpenLog(); // this loop is runs once per operation for (vector<Item>::const_iterator I = List.begin(); I != List.end();) { vector<Item>::const_iterator J = I; for (; J != List.end() && J->Op == I->Op; J++) /* nothing */; // Generate the argument list const char *Args[MaxArgs + 50]; // 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 if (J - I > (signed)MaxArgs) J = I + MaxArgs; unsigned int n = 0; unsigned long Size = 0; string const Tmp = _config->Find("Dir::Bin::dpkg","dpkg"); Args[n++] = Tmp.c_str(); Size += strlen(Args[n-1]); // 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[n++] = Opts->Value.c_str(); Size += Opts->Value.length(); } } char status_fd_buf[20]; int fd[2]; pipe(fd); Args[n++] = "--status-fd"; Size += strlen(Args[n-1]); snprintf(status_fd_buf,sizeof(status_fd_buf),"%i", fd[1]); Args[n++] = status_fd_buf; Size += strlen(Args[n-1]); switch (I->Op) { case Item::Remove: Args[n++] = "--force-depends"; Size += strlen(Args[n-1]); Args[n++] = "--force-remove-essential"; Size += strlen(Args[n-1]); Args[n++] = "--remove"; Size += strlen(Args[n-1]); break; case Item::Purge: Args[n++] = "--force-depends"; Size += strlen(Args[n-1]); Args[n++] = "--force-remove-essential"; Size += strlen(Args[n-1]); Args[n++] = "--purge"; Size += strlen(Args[n-1]); break; case Item::Configure: Args[n++] = "--configure"; Size += strlen(Args[n-1]); break; case Item::ConfigurePending: Args[n++] = "--configure"; Size += strlen(Args[n-1]); Args[n++] = "--pending"; Size += strlen(Args[n-1]); break; case Item::TriggersPending: Args[n++] = "--triggers-only"; Size += strlen(Args[n-1]); Args[n++] = "--pending"; Size += strlen(Args[n-1]); break; case Item::Install: Args[n++] = "--unpack"; Size += strlen(Args[n-1]); Args[n++] = "--auto-deconfigure"; Size += strlen(Args[n-1]); break; } if (NoTriggers == true && I->Op != Item::TriggersPending && I->Op != Item::ConfigurePending) { Args[n++] = "--no-triggers"; Size += strlen(Args[n-1]); } // 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[n++] = I->File.c_str(); Size += strlen(Args[n-1]); } } else { for (;I != J && Size < MaxArgBytes; I++) { if((*I).Pkg.end() == true) continue; Args[n++] = I->Pkg.Name(); Size += strlen(Args[n-1]); } } Args[n] = 0; J = I; if (_config->FindB("Debug::pkgDPkgPM",false) == true) { for (unsigned int k = 0; k != n; k++) clog << Args[k] << ' '; clog << endl; continue; } 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,SIG_IGN); // ignore SIGHUP as well (debian #463030) sighandler_t old_SIGHUP = signal(SIGHUP,SIG_IGN); struct termios tt; struct winsize win; int master; int slave; // FIXME: setup sensible signal handling (*ick*) tcgetattr(0, &tt); 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); fprintf(term_out, "%s",s); master = slave = -1; } else { struct termios rtt; rtt = tt; cfmakeraw(&rtt); rtt.c_lflag &= ~ECHO; // 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); 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); // 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 (!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) _error->Error("Sub-process %s received a segmentation fault.",Args[0]); else if (WIFEXITED(Status) != 0) _error->Error("Sub-process %s returned an error code (%u)",Args[0],WEXITSTATUS(Status)); else _error->Error("Sub-process %s exited unexpectedly",Args[0]); if(stopOnError) { CloseLog(); return false; } } } CloseLog(); if (RunScripts("DPkg::Post-Invoke") == false) return false; Cache.writeStateFile(NULL); return true; } /*}}}*/ // pkgDpkgPM::Reset - Dump the contents of the command list /*{{{*/ // --------------------------------------------------------------------- /* */ void pkgDPkgPM::Reset() { List.erase(List.begin(),List.end()); } /*}}}*/