X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/71ecaad29d8066a494f516efc5efd80860653fe2..dabe9e2482180ada77d2adda2b3c03db22059fb8:/apt-pkg/deb/debsystem.cc diff --git a/apt-pkg/deb/debsystem.cc b/apt-pkg/deb/debsystem.cc index 7ed6936c3..899f7328b 100644 --- a/apt-pkg/deb/debsystem.cc +++ b/apt-pkg/deb/debsystem.cc @@ -19,10 +19,23 @@ #include #include #include -#include +#include +#include + +#include + +#include +#include +#include +#include +#include #include #include #include +#include +#include +#include +#include #include /*}}}*/ @@ -31,7 +44,7 @@ using std::string; debSystem debSys; -class debSystemPrivate { +class APT_HIDDEN debSystemPrivate { public: debSystemPrivate() : LockFD(-1), LockCount(0), StatusFile(0) { @@ -46,11 +59,8 @@ public: // System::debSystem - Constructor /*{{{*/ // --------------------------------------------------------------------- /* */ -debSystem::debSystem() +debSystem::debSystem() : pkgSystem("Debian dpkg interface", &debVS), d(new debSystemPrivate()) { - d = new debSystemPrivate(); - Label = "Debian dpkg interface"; - VS = &debVS; } /*}}}*/ // System::~debSystem - Destructor /*{{{*/ @@ -76,7 +86,7 @@ bool debSystem::Lock() } // Create the lockfile - string AdminDir = flNotFile(_config->Find("Dir::State::status")); + string AdminDir = flNotFile(_config->FindFile("Dir::State::status")); d->LockFD = GetLock(AdminDir + "lock"); if (d->LockFD == -1) { @@ -135,7 +145,7 @@ bool debSystem::UnLock(bool NoErrors) bool debSystem::CheckUpdates() { // Check for updates.. (dirty) - string File = flNotFile(_config->Find("Dir::State::status")) + "updates/"; + string File = flNotFile(_config->FindFile("Dir::State::status")) + "updates/"; DIR *DirP = opendir(File.c_str()); if (DirP == 0) return false; @@ -174,14 +184,34 @@ pkgPackageManager *debSystem::CreatePM(pkgDepCache *Cache) const // System::Initialize - Setup the configuration space.. /*{{{*/ // --------------------------------------------------------------------- /* These are the Debian specific configuration variables.. */ +static std::string getDpkgStatusLocation(Configuration const &Cnf) { + Configuration PathCnf; + PathCnf.Set("Dir", Cnf.Find("Dir", "/")); + PathCnf.Set("Dir::State::status", "status"); + auto const cnfstatedir = Cnf.Find("Dir::State", STATE_DIR + 1); + // if the state dir ends in apt, replace it with dpkg - + // for the default this gives us the same as the fallback below. + // This can't be a ../dpkg as that would play bad with symlinks + std::string statedir; + if (APT::String::Endswith(cnfstatedir, "/apt/")) + statedir.assign(cnfstatedir, 0, cnfstatedir.length() - 5); + else if (APT::String::Endswith(cnfstatedir, "/apt")) + statedir.assign(cnfstatedir, 0, cnfstatedir.length() - 4); + if (statedir.empty()) + PathCnf.Set("Dir::State", "var/lib/dpkg"); + else + PathCnf.Set("Dir::State", flCombine(statedir, "dpkg")); + return PathCnf.FindFile("Dir::State::status"); +} bool debSystem::Initialize(Configuration &Cnf) { /* These really should be jammed into a generic 'Local Database' engine which is yet to be determined. The functions in pkgcachegen should be the only users of these */ Cnf.CndSet("Dir::State::extended_states", "extended_states"); - Cnf.CndSet("Dir::State::status","/var/lib/dpkg/status"); - Cnf.CndSet("Dir::Bin::dpkg","/usr/bin/dpkg"); + if (Cnf.Exists("Dir::State::status") == false) + Cnf.Set("Dir::State::status", getDpkgStatusLocation(Cnf)); + Cnf.CndSet("Dir::Bin::dpkg",BIN_DIR"/dpkg"); if (d->StatusFile) { delete d->StatusFile; @@ -193,9 +223,9 @@ bool debSystem::Initialize(Configuration &Cnf) /*}}}*/ // System::ArchiveSupported - Is a file format supported /*{{{*/ // --------------------------------------------------------------------- -/* The standard name for a deb is 'deb'.. There are no seperate versions +/* The standard name for a deb is 'deb'.. There are no separate versions of .deb to worry about.. */ -bool debSystem::ArchiveSupported(const char *Type) +APT_PURE bool debSystem::ArchiveSupported(const char *Type) { if (strcmp(Type,"deb") == 0) return true; @@ -209,9 +239,9 @@ bool debSystem::ArchiveSupported(const char *Type) signed debSystem::Score(Configuration const &Cnf) { signed Score = 0; - if (FileExists(Cnf.FindFile("Dir::State::status","/var/lib/dpkg/status")) == true) + if (FileExists(Cnf.FindFile("Dir::State::status",getDpkgStatusLocation(Cnf).c_str())) == true) Score += 10; - if (FileExists(Cnf.FindFile("Dir::Bin::dpkg","/usr/bin/dpkg")) == true) + if (FileExists(Cnf.Find("Dir::Bin::dpkg",BIN_DIR"/dpkg")) == true) Score += 10; if (FileExists("/etc/debian_version") == true) Score += 10; @@ -246,3 +276,164 @@ bool debSystem::FindIndex(pkgCache::PkgFileIterator File, return false; } /*}}}*/ + +std::string debSystem::GetDpkgExecutable() /*{{{*/ +{ + string Tmp = _config->Find("Dir::Bin::dpkg","dpkg"); + string const dpkgChrootDir = _config->FindDir("DPkg::Chroot-Directory", "/"); + size_t dpkgChrootLen = dpkgChrootDir.length(); + if (dpkgChrootDir != "/" && Tmp.find(dpkgChrootDir) == 0) + { + if (dpkgChrootDir[dpkgChrootLen - 1] == '/') + --dpkgChrootLen; + Tmp = Tmp.substr(dpkgChrootLen); + } + return Tmp; +} + /*}}}*/ +std::vector debSystem::GetDpkgBaseCommand() /*{{{*/ +{ + // Generate the base argument list for dpkg + std::vector Args = { GetDpkgExecutable() }; + // 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); + } + } + return Args; +} + /*}}}*/ +void debSystem::DpkgChrootDirectory() /*{{{*/ +{ + std::string const chrootDir = _config->FindDir("DPkg::Chroot-Directory"); + if (chrootDir == "/") + return; + std::cerr << "Chrooting into " << chrootDir << std::endl; + if (chroot(chrootDir.c_str()) != 0) + _exit(100); + if (chdir("/") != 0) + _exit(100); +} + /*}}}*/ +pid_t debSystem::ExecDpkg(std::vector const &sArgs, int * const inputFd, int * const outputFd, bool const DiscardOutput)/*{{{*/ +{ + std::vector Args(sArgs.size(), NULL); + std::transform(sArgs.begin(), sArgs.end(), Args.begin(), [](std::string const &s) { return s.c_str(); }); + Args.push_back(NULL); + + int external[2] = {-1, -1}; + if (inputFd != nullptr || outputFd != nullptr) + if (pipe(external) != 0) + { + _error->WarningE("dpkg", "Can't create IPC pipe for dpkg call"); + return -1; + } + + pid_t const dpkg = ExecFork(); + if (dpkg == 0) { + int const nullfd = open("/dev/null", O_RDONLY); + if (inputFd == nullptr) + dup2(nullfd, STDIN_FILENO); + else + { + close(external[1]); + dup2(external[0], STDIN_FILENO); + } + if (outputFd == nullptr) + dup2(nullfd, STDOUT_FILENO); + else + { + close(external[0]); + dup2(external[1], STDOUT_FILENO); + } + if (DiscardOutput == true) + dup2(nullfd, STDERR_FILENO); + debSystem::DpkgChrootDirectory(); + execvp(Args[0], (char**) &Args[0]); + _error->WarningE("dpkg", "Can't execute dpkg!"); + _exit(100); + } + if (outputFd != nullptr) + { + close(external[1]); + *outputFd = external[0]; + } + else if (inputFd != nullptr) + { + close(external[0]); + *inputFd = external[1]; + } + return dpkg; +} + /*}}}*/ +bool debSystem::SupportsMultiArch() /*{{{*/ +{ + std::vector Args = GetDpkgBaseCommand(); + Args.push_back("--assert-multi-arch"); + pid_t const dpkgAssertMultiArch = ExecDpkg(Args, nullptr, nullptr, true); + 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) + return true; + } + return false; +} + /*}}}*/ +std::vector debSystem::SupportedArchitectures() /*{{{*/ +{ + std::vector archs; + { + string const arch = _config->Find("APT::Architecture"); + if (arch.empty() == false) + archs.push_back(std::move(arch)); + } + + std::vector sArgs = GetDpkgBaseCommand(); + sArgs.push_back("--print-foreign-architectures"); + int outputFd = -1; + pid_t const dpkgMultiArch = ExecDpkg(sArgs, nullptr, &outputFd, true); + if (dpkgMultiArch == -1) + return archs; + + FILE *dpkg = fdopen(outputFd, "r"); + if(dpkg != NULL) { + char* buf = NULL; + size_t bufsize = 0; + while (getline(&buf, &bufsize, dpkg) != -1) + { + char* tok_saveptr; + char* arch = strtok_r(buf, " ", &tok_saveptr); + while (arch != NULL) { + for (; isspace_ascii(*arch) != 0; ++arch); + if (arch[0] != '\0') { + char const* archend = arch; + for (; isspace_ascii(*archend) == 0 && *archend != '\0'; ++archend); + string a(arch, (archend - arch)); + if (std::find(archs.begin(), archs.end(), a) == archs.end()) + archs.push_back(a); + } + arch = strtok_r(NULL, " ", &tok_saveptr); + } + } + free(buf); + fclose(dpkg); + } + ExecWait(dpkgMultiArch, "dpkg --print-foreign-architectures", true); + return archs; +} + /*}}}*/