X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/d4db3e0afce3492d75ab2226393f93e58b0fbfde..c6aa14e46842b0059c1648125562793e5edd08ee:/apt-pkg/deb/dpkgpm.cc diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index 36086d72e..f787f365e 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -14,6 +14,7 @@ #include #include #include +#include #include #include @@ -24,6 +25,8 @@ #include #include #include +#include +#include #include #include @@ -38,14 +41,70 @@ 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 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 PackageProcessingOpsBegin = PackageProcessingOps; + const std::pair * 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 &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), PackagesDone(0), - PackagesTotal(0), term_out(NULL) + : pkgPackageManager(Cache), dpkgbuf_pos(0), + term_out(NULL), PackagesDone(0), PackagesTotal(0) { } /*}}}*/ @@ -95,68 +154,6 @@ bool pkgDPkgPM::Remove(PkgIterator Pkg,bool Purge) return true; } /*}}}*/ -// DPkgPM::RunScripts - Run a set of scripts /*{{{*/ -// --------------------------------------------------------------------- -/* This looks for a list of script sto run from the configuration file, - each one is run with system from a forked child. */ -bool pkgDPkgPM::RunScripts(const char *Cnf) -{ - Configuration::Item const *Opts = _config->Tree(Cnf); - if (Opts == 0 || Opts->Child == 0) - return true; - Opts = Opts->Child; - - // Fork for running the system calls - pid_t Child = ExecFork(); - - // This is the child - if (Child == 0) - { - if (chdir("/tmp/") != 0) - _exit(100); - - unsigned int Count = 1; - for (; Opts != 0; Opts = Opts->Next, Count++) - { - if (Opts->Value.empty() == true) - continue; - - if (system(Opts->Value.c_str()) != 0) - _exit(100+Count); - } - _exit(0); - } - - // Wait for the child - int Status = 0; - while (waitpid(Child,&Status,0) != Child) - { - if (errno == EINTR) - continue; - return _error->Errno("waitpid","Couldn't wait for subprocess"); - } - - // Restore sig int/quit - signal(SIGQUIT,SIG_DFL); - signal(SIGINT,SIG_DFL); - - // Check for an error code. - if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) - { - unsigned int Count = WEXITSTATUS(Status); - if (Count > 100) - { - Count -= 100; - for (; Opts != 0 && Count != 1; Opts = Opts->Next, Count--); - _error->Error("Problem executing scripts %s '%s'",Cnf,Opts->Value.c_str()); - } - - return _error->Error("Sub-process returned an error code"); - } - - return true; -} - /*}}}*/ // DPkgPM::SendV2Pkgs - Send version 2 package info /*{{{*/ // --------------------------------------------------------------------- /* This is part of the helper script communication interface, it sends @@ -342,9 +339,12 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) */ void pkgDPkgPM::DoStdin(int master) { - char input_buf[256] = {0,}; - int len = read(0, input_buf, sizeof(input_buf)); - write(master, input_buf, len); + 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 /*{{{*/ @@ -354,10 +354,18 @@ void pkgDPkgPM::DoStdin(int master) */ void pkgDPkgPM::DoTerminalPty(int master) { - char term_buf[1024] = {0,}; + unsigned char term_buf[1024] = {0,0, }; - int len=read(master, term_buf, sizeof(term_buf)); - if(len <= 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) @@ -383,6 +391,12 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line) '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: trigproc: trigger' */ char* list[5]; @@ -392,12 +406,42 @@ void pkgDPkgPM::ProcessDpkgStatusLine(int OutStatusFd, char *line) // 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 (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true) + std::clog << "ignoring line: not enough ':'" << std::endl; + return; + } char *pkg = list[1]; char *action = _strstrip(list[2]); - if( pkg == NULL || action == NULL) + + // 'processing' from dpkg looks like + // 'processing: action: pkg' + if(strncmp(list[0], "processing", strlen("processing")) == 0) { + char s[200]; + char *pkg_or_trigger = _strstrip(list[2]); + action =_strstrip( list[1]); + const std::pair * const iter = + std::find_if(PackageProcessingOpsBegin, + PackageProcessingOpsEnd, + MatchProcessingOp(action)); + if(iter == PackageProcessingOpsEnd) + { + if (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true) + std::clog << "ignoring unknwon 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 (_config->FindB("Debug::pkgDPkgProgressReporting",false) == true) - std::clog << "ignoring line: not enough ':'" << std::endl; + std::clog << "send: '" << status.str() << "'" << endl; return; } @@ -495,6 +539,67 @@ void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd) } /*}}}*/ +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; +} + +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 /*{{{*/ // --------------------------------------------------------------------- @@ -507,15 +612,21 @@ void pkgDPkgPM::DoDpkgStatusFd(int statusfd, int OutStatusFd) */ bool pkgDPkgPM::Go(int OutStatusFd) { + fd_set rfds; + struct timespec tv; + sigset_t sigmask; + sigset_t original_sigmask; + unsigned int MaxArgs = _config->FindI("Dpkg::MaxArgs",8*1024); unsigned int MaxArgBytes = _config->FindI("Dpkg::MaxArgBytes",32*1024); + bool NoTriggers = _config->FindB("DPkg::NoTriggers",false); if (RunScripts("DPkg::Pre-Invoke") == false) return false; if (RunScriptsWithPkgs("DPkg::Pre-Install-Pkgs") == false) return false; - + // 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] = { @@ -529,20 +640,12 @@ bool pkgDPkgPM::Go(int OutStatusFd) { {"unpacked",N_("Preparing to configure %s") }, {"half-configured", N_("Configuring %s") }, -#if 0 - {"triggers-awaited", N_("Processing triggers for %s") }, - {"triggers-pending", N_("Processing triggers for %s") }, -#endif { "installed", N_("Installed %s")}, {NULL, NULL} }, // Remove operation { {"half-configured", N_("Preparing for removal of %s")}, -#if 0 - {"triggers-awaited", N_("Preparing for removal of %s")}, - {"triggers-pending", N_("Preparing for removal of %s")}, -#endif {"half-installed", N_("Removing %s")}, {"config-files", N_("Removed %s")}, {NULL, NULL} @@ -570,34 +673,28 @@ bool pkgDPkgPM::Go(int OutStatusFd) } } + stdin_is_dev_null = false; + // create log - 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, outstr); - fprintf(term_out, "\n"); - } + OpenLog(); // this loop is runs once per operation for (vector::iterator I = List.begin(); I != List.end();) { vector::iterator J = I; - for (; J != List.end() && J->Op == I->Op; J++); + 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; @@ -653,6 +750,8 @@ bool pkgDPkgPM::Go(int OutStatusFd) case Item::Configure: Args[n++] = "--configure"; + if (NoTriggers) + Args[n++] = "--no-triggers"; Size += strlen(Args[n-1]); break; @@ -705,6 +804,9 @@ bool pkgDPkgPM::Go(int OutStatusFd) 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; @@ -725,12 +827,28 @@ bool pkgDPkgPM::Go(int OutStatusFd) 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 @@ -748,6 +866,15 @@ bool pkgDPkgPM::Go(int OutStatusFd) } 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); @@ -767,15 +894,18 @@ bool pkgDPkgPM::Go(int OutStatusFd) _exit(100); } - /* No Job Control Stop Env is a magic dpkg var that prevents it from using sigstop */ - putenv("DPKG_NO_TSTP=yes"); + 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]); @@ -792,8 +922,9 @@ bool pkgDPkgPM::Go(int OutStatusFd) close(slave); // setups fds - fd_set rfds; - struct timeval tv; + sigemptyset(&sigmask); + sigprocmask(SIG_BLOCK,&sigmask,&original_sigmask); + int select_ret; while ((res=waitpid(Child,&Status, WNOHANG)) != Child) { if(res < 0) { @@ -806,24 +937,34 @@ bool pkgDPkgPM::Go(int OutStatusFd) // 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); - FD_SET(0, &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_usec = 0; - select_ret = select(max(master, _dpkgin)+1, &rfds, NULL, NULL, &tv); - if (select_ret < 0) { - std::cerr << "Error in select()" << std::endl; - continue; - } else if (select_ret == 0) - continue; - + 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)) @@ -836,9 +977,13 @@ bool pkgDPkgPM::Go(int OutStatusFd) // Restore sig int/quit signal(SIGQUIT,old_SIGQUIT); signal(SIGINT,old_SIGINT); + signal(SIGHUP,old_SIGHUP); - if(master >= 0 && slave >= 0) + if(master >= 0) + { tcsetattr(0, TCSAFLUSH, &tt); + close(master); + } // Check for an error code. if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) @@ -860,17 +1005,17 @@ bool pkgDPkgPM::Go(int OutStatusFd) if(stopOnError) { - if(term_out) - fclose(term_out); + CloseLog(); return false; } } } - if(term_out) - fclose(term_out); + CloseLog(); if (RunScripts("DPkg::Post-Invoke") == false) return false; + + Cache.writeStateFile(NULL); return true; } /*}}}*/