X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/42285f827b6a28becc2d47d82f82f74f6ca68a11..bd4a8f51649ee37291c6e07310104a94f4f5fbed:/apt-pkg/deb/dpkgpm.cc diff --git a/apt-pkg/deb/dpkgpm.cc b/apt-pkg/deb/dpkgpm.cc index 7a0253383..ce9224791 100644 --- a/apt-pkg/deb/dpkgpm.cc +++ b/apt-pkg/deb/dpkgpm.cc @@ -14,6 +14,7 @@ #include #include #include +#include #include #include #include @@ -82,7 +83,7 @@ public: bool stdin_is_dev_null; // the buffer we use for the dpkg status-fd reading char dpkgbuf[1024]; - int dpkgbuf_pos; + size_t dpkgbuf_pos; FILE *term_out; FILE *history_out; string dpkg_error; @@ -125,7 +126,7 @@ namespace const char *target; public: - MatchProcessingOp(const char *the_target) + explicit MatchProcessingOp(const char *the_target) : target(the_target) { } @@ -162,35 +163,6 @@ ionice(int PID) return ExecWait(Process, "ionice"); } -static std::string 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; -} - -// dpkgChrootDirectory - chrooting for dpkg if needed /*{{{*/ -static void 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); -} - /*}}}*/ - - // FindNowVersion - Helper to find a Version in "now" state /*{{{*/ // --------------------------------------------------------------------- /* This is helpful when a package is no longer installed but has residual @@ -466,7 +438,7 @@ bool pkgDPkgPM::RunScriptsWithPkgs(const char *Cnf) strprintf(hookfd, "%d", InfoFD); setenv("APT_HOOK_INFO_FD", hookfd.c_str(), 1); - dpkgChrootDirectory(); + debSystem::DpkgChrootDirectory(); const char *Args[4]; Args[0] = "/bin/sh"; Args[1] = "-c"; @@ -782,40 +754,33 @@ void pkgDPkgPM::handleDisappearAction(string const &pkgname) } /*}}}*/ // DPkgPM::DoDpkgStatusFd /*{{{*/ -// --------------------------------------------------------------------- -/* - */ void pkgDPkgPM::DoDpkgStatusFd(int statusfd) { - char *p, *q; - int len; - - len=read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], sizeof(d->dpkgbuf)-d->dpkgbuf_pos); - d->dpkgbuf_pos += len; + ssize_t const len = read(statusfd, &d->dpkgbuf[d->dpkgbuf_pos], + (sizeof(d->dpkgbuf)/sizeof(d->dpkgbuf[0])) - d->dpkgbuf_pos); if(len <= 0) return; + d->dpkgbuf_pos += (len / sizeof(d->dpkgbuf[0])); - // 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) + // process line by line from the buffer + char *p = d->dpkgbuf, *q = nullptr; + while((q=(char*)memchr(p, '\n', (d->dpkgbuf + d->dpkgbuf_pos) - p)) != nullptr) { - *q = 0; + *q = '\0'; ProcessDpkgStatusLine(p); - p=q+1; // continue with next line + 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) + // check if we stripped the buffer clean + if (p > (d->dpkgbuf + d->dpkgbuf_pos)) + { + d->dpkgbuf_pos = 0; 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; + // otherwise move the unprocessed tail to the start and update pos + memmove(d->dpkgbuf, p, (p - d->dpkgbuf)); + d->dpkgbuf_pos = (d->dpkgbuf + d->dpkgbuf_pos) - p; } /*}}}*/ // DPkgPM::WriteHistoryTag /*{{{*/ @@ -1225,44 +1190,13 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) d->progress = progress; // Generate the base argument list for dpkg - unsigned long StartSize = 0; - std::vector Args; - std::string DpkgExecutable = getDpkgExecutable(); - Args.push_back(DpkgExecutable.c_str()); - StartSize += DpkgExecutable.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(); - } - } - + std::vector const sArgs = debSystem::GetDpkgBaseCommand(); + std::vector Args(sArgs.size(), NULL); + std::transform(sArgs.begin(), sArgs.end(), Args.begin(), + [](std::string const &s) { return s.c_str(); }); + unsigned long long const StartSize = std::accumulate(sArgs.begin(), sArgs.end(), 0llu, + [](unsigned long long const i, std::string const &s) { return i + s.length(); }); size_t const BaseArgs = Args.size(); - // 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) - { - dpkgChrootDirectory(); - // 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); - execvp(Args[0], (char**) &Args[0]); - _error->WarningE("dpkgGo", "Can't detect if dpkg supports multi-arch!"); - _exit(2); - } fd_set rfds; struct timespec tv; @@ -1298,20 +1232,7 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) // 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; - } + bool dpkgMultiArch = debSystem::SupportsMultiArch(); // start pty magic before the loop StartPtyMagic(); @@ -1528,7 +1449,7 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) SetupSlavePtyMagic(); close(fd[0]); // close the read end of the pipe - dpkgChrootDirectory(); + debSystem::DpkgChrootDirectory(); if (chdir(_config->FindDir("DPkg::Run-Directory","/").c_str()) != 0) _exit(100); @@ -1669,7 +1590,7 @@ bool pkgDPkgPM::Go(APT::Progress::PackageManager *progress) { std::string const oldpkgcache = _config->FindFile("Dir::cache::pkgcache"); if (oldpkgcache.empty() == false && RealFileExists(oldpkgcache) == true && - unlink(oldpkgcache.c_str()) == 0) + RemoveFile("pkgDPkgPM::Go", oldpkgcache)) { std::string const srcpkgcache = _config->FindFile("Dir::cache::srcpkgcache"); if (srcpkgcache.empty() == false && RealFileExists(srcpkgcache) == true) @@ -1790,11 +1711,11 @@ void pkgDPkgPM::WriteApportReport(const char *pkgpath, const char *errormsg) if(pos != string::npos) pkgname = pkgname.substr(0, pos); - // find the package versin and source package name + // find the package version and source package name pkgCache::PkgIterator Pkg = Cache.FindPkg(pkgname); if (Pkg.end() == true) return; - pkgCache::VerIterator Ver = Cache.GetCandidateVer(Pkg); + pkgCache::VerIterator Ver = Cache.GetCandidateVersion(Pkg); if (Ver.end() == true) return; pkgver = Ver.VerStr() == NULL ? "unknown" : Ver.VerStr();