- if (argc > 1 && (strcmp(argv[1], "--help") == 0 || strcmp(argv[1],"-h") == 0 ||
- strcmp(argv[1],"-v") == 0 || strcmp(argv[1],"--version") == 0)) {
- ShowHelp();
- return 0;
- }
-
- // we really don't need anything
- DropPrivileges();
- char const * const filename = getenv("APT_EDSP_DUMP_FILENAME");
- if (filename == NULL || strlen(filename) == 0)
- {
- EDSP::WriteError("ERR_NO_FILENAME", "You have to set the environment variable APT_EDSP_DUMP_FILENAME\n"
- "to a valid filename to store the dump of EDSP solver input in.\n"
- "For example with: export APT_EDSP_DUMP_FILENAME=/tmp/dump.edsp", stdout);
- return 0;
- }
-
- unlink(filename);
- FileFd input, output;
- if (input.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false ||
- output.Open(filename, FileFd::WriteOnly | FileFd::Create | FileFd::Exclusive, 0600) == false ||
- CopyFile(input, output) == false || input.Close() == false || output.Close() == false)
- {
- std::ostringstream out;
- out << "Writing EDSP solver input to file '" << filename << "' failed!\n";
- _error->DumpErrors(out);
- EDSP::WriteError("ERR_WRITE_ERROR", out.str(), stdout);
- return 0;
- }
-
- EDSP::WriteError("ERR_JUST_DUMPING", "I am too dumb, i can just dump!\nPlease use one of my friends instead!", stdout);
- return 0;
+ CommandLine CmdL;
+ ParseCommandLine(CmdL, APT_CMD::APT_DUMP_SOLVER, &_config, nullptr, argc, argv, &ShowHelp, &GetCommands);
+ _config->Clear("Dir::Log");
+
+ bool const is_forwarding_dumper = (CmdL.FileSize() != 0);
+
+ FileFd stdoutfd;
+ if (stdoutfd.OpenDescriptor(STDOUT_FILENO, FileFd::WriteOnly | FileFd::BufferedWrite, true) == false)
+ return 252;
+
+ FileFd dump;
+ char const * const filename = is_forwarding_dumper ? CmdL.FileList[0] : getenv("APT_EDSP_DUMP_FILENAME");
+ if (filename == nullptr || strlen(filename) == 0)
+ {
+ if (is_forwarding_dumper == false)
+ {
+ EDSP::WriteError("ERR_NO_FILENAME", "You have to set the environment variable APT_EDSP_DUMP_FILENAME\n"
+ "to a valid filename to store the dump of EDSP solver input in.\n"
+ "For example with: export APT_EDSP_DUMP_FILENAME=/tmp/dump.edsp", stdoutfd);
+ return 0;
+ }
+ }
+ else
+ {
+ // ignore errors here as logging isn't really critical
+ _error->PushToStack();
+ if (dump.Open(filename, FileFd::WriteOnly | FileFd::Exclusive | FileFd::Create, FileFd::Extension, 0644) == false &&
+ is_forwarding_dumper == false)
+ {
+ _error->MergeWithStack();
+ std::ostringstream out;
+ out << "Writing EDSP solver input to file '" << filename << "' failed as it couldn't be created!\n";
+ return WriteError("ERR_CREATE_FILE", out, stdoutfd, 0);
+ }
+ _error->RevertToStack();
+ }
+
+ pid_t Solver = 0;
+ FileFd forward;
+ if (is_forwarding_dumper)
+ {
+ int external[] = {-1, -1};
+ if (pipe(external) != 0)
+ return 250;
+ for (int i = 0; i < 2; ++i)
+ SetCloseExec(external[i], true);
+
+ Solver = ExecFork();
+ if (Solver == 0) {
+ _config->Set("APT::Sandbox::User", _config->Find("APT::Solver::RunAsUser", _config->Find("APT::Sandbox::User")));
+ DropPrivileges();
+ dup2(external[0], STDIN_FILENO);
+ execv(CmdL.FileList[1], const_cast<char**>(CmdL.FileList + 1));
+ std::cerr << "Failed to execute '" << CmdL.FileList[1] << "'!" << std::endl;
+ _exit(100);
+ }
+ close(external[0]);
+
+ if (WaitFd(external[1], true, 5) == false)
+ return 251;
+
+ if (forward.OpenDescriptor(external[1], FileFd::WriteOnly | FileFd::BufferedWrite, true) == false)
+ return 252;
+ }
+
+ DropPrivileges();
+
+ FileFd input;
+ if (input.OpenDescriptor(STDIN_FILENO, FileFd::ReadOnly) == false)
+ {
+ std::ostringstream out;
+ out << "Writing EDSP solver input to file '" << filename << "' failed as stdin couldn't be opened!\n";
+ return WriteError("ERR_READ_ERROR", out, stdoutfd, Solver);
+ }
+
+ constexpr size_t BufSize = 64 * 1024;
+ std::unique_ptr<char[]> Buf(new char[BufSize]);
+ unsigned long long ToRead = 0;
+ do {
+ if (input.Read(Buf.get(),BufSize, &ToRead) == false)
+ {
+ std::ostringstream out;
+ out << "Writing EDSP solver input to file '" << filename << "' failed as reading from stdin failed!\n";
+ return WriteError("ERR_READ_ERROR", out, stdoutfd, Solver);
+ }
+ if (ToRead == 0)
+ break;
+ if (forward.IsOpen() && forward.Failed() == false && forward.Write(Buf.get(),ToRead) == false)
+ forward.Close();
+ if (dump.IsOpen() && dump.Failed() == false && dump.Write(Buf.get(),ToRead) == false)
+ dump.Close();
+ } while (true);
+ input.Close();
+ forward.Close();
+ dump.Close();
+
+ if (_error->PendingError())
+ {
+ std::ostringstream out;
+ out << "Writing EDSP solver input to file '" << filename << "' failed due to write errors!\n";
+ return WriteError("ERR_WRITE_ERROR", out, stdoutfd, Solver);
+ }
+
+ if (is_forwarding_dumper)
+ {
+ // Wait and collect the error code
+ int Status;
+ while (waitpid(Solver, &Status, 0) != Solver)
+ {
+ if (errno == EINTR)
+ continue;
+
+ std::ostringstream out;
+ ioprintf(out, _("Waited for %s but it wasn't there"), CmdL.FileList[1]);
+ return WriteError("ERR_FORWARD", out, stdoutfd, 0);
+ }
+ if (WIFEXITED(Status))
+ return WEXITSTATUS(Status);
+ else
+ return 255;
+ }
+ else
+ EDSP::WriteError("ERR_JUST_DUMPING", "I am too dumb, i can just dump!\nPlease use one of my friends instead!", stdoutfd);
+ return 0;
projects / apt.git / blobdiff