diff options
Diffstat (limited to 'apt-pkg/algorithms.cc')
| -rw-r--r-- | apt-pkg/algorithms.cc | 65 |
1 files changed, 59 insertions, 6 deletions
diff --git a/apt-pkg/algorithms.cc b/apt-pkg/algorithms.cc index 0b4366e5e..bbe315ef7 100644 --- a/apt-pkg/algorithms.cc +++ b/apt-pkg/algorithms.cc @@ -20,12 +20,15 @@ #include <apt-pkg/version.h> #include <apt-pkg/sptr.h> #include <apt-pkg/acquire-item.h> - +#include <apt-pkg/edsp.h> + #include <apti18n.h> #include <sys/types.h> #include <cstdlib> #include <algorithm> #include <iostream> + +#include <stdio.h> /*}}}*/ using namespace std; @@ -731,7 +734,57 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg) return true; } /*}}}*/ -// ProblemResolver::Resolve - Run the resolution pass /*{{{*/ +// ProblemResolver::Resolve - calls a resolver to fix the situation /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool pkgProblemResolver::Resolve(bool BrokenFix) +{ + std::string const solver = _config->Find("APT::Solver::Name", "internal"); + + if (solver != "internal") + { +// std::string const file = _config->FindDir("Dir::Bin::Solvers") + solver; + std::string const file = solver; + if (RealFileExists(file.c_str()) == false) + return _error->Error("Can't call external solver '%s' as it is not available: %s", solver.c_str(), file.c_str()); + int external[4] = {-1, -1, -1, -1}; + if (pipe(external) != 0 || pipe(external + 2) != 0) + return _error->Errno("Resolve", "Can't create needed IPC pipes for EDSP"); + for (int i = 0; i < 4; ++i) + SetCloseExec(external[i], true); + + pid_t Solver = ExecFork(); + if (Solver == 0) + { + dup2(external[0], STDIN_FILENO); + dup2(external[3], STDOUT_FILENO); + const char* calling[2] = { file.c_str(), 0 }; + execv(calling[0], (char**) calling); + std::cerr << "Failed to execute solver '" << solver << "'!" << std::endl; + _exit(100); + } + close(external[0]); + close(external[3]); + + if (WaitFd(external[1], true, 5) == false) + return _error->Errno("Resolve", "Waiting on availability of solver stdin timed out"); + + FILE* output = fdopen(external[1], "w"); + if (output == NULL) + return _error->Errno("Resolve", "fdopen on solver stdin failed"); + EDSP::WriteRequest(Cache, output); + EDSP::WriteScenario(Cache, output); + fclose(output); + + if (EDSP::ReadResponse(external[2], Cache) == false) + return _error->Error("Reading solver response failed"); + + return ExecWait(Solver, solver.c_str(), false); + } + return ResolveInternal(BrokenFix); +} + /*}}}*/ +// ProblemResolver::ResolveInternal - Run the resolution pass /*{{{*/ // --------------------------------------------------------------------- /* This routines works by calculating a score for each package. The score is derived by considering the package's priority and all reverse @@ -745,12 +798,10 @@ bool pkgProblemResolver::DoUpgrade(pkgCache::PkgIterator Pkg) The BrokenFix flag enables a mode where the algorithm tries to upgrade packages to advoid problems. */ -bool pkgProblemResolver::Resolve(bool BrokenFix) +bool pkgProblemResolver::ResolveInternal(bool const BrokenFix) { pkgDepCache::ActionGroup group(Cache); - unsigned long Size = Cache.Head().PackageCount; - // Record which packages are marked for install bool Again = false; do @@ -780,7 +831,9 @@ bool pkgProblemResolver::Resolve(bool BrokenFix) clog << "Starting" << endl; MakeScores(); - + + unsigned long const Size = Cache.Head().PackageCount; + /* We have to order the packages so that the broken fixing pass operates from highest score to lowest. This prevents problems when high score packages cause the removal of lower score packages that |