-// ExecCompressor - Open a de/compressor pipe /*{{{*/
-// ---------------------------------------------------------------------
-/* This opens the compressor, either in compress mode or decompress
- mode. FileFd is always the compressor input/output file,
- OutFd is the created pipe, Input for Compress, Output for Decompress. */
-bool ExecCompressor(APT::Configuration::Compressor const &Prog,
- pid_t *Pid, int const FileFd, int &OutFd, bool const Comp)
-{
- if (Pid != NULL)
- *Pid = -1;
-
- // No compression
- if (Prog.Binary.empty() == true)
- {
- OutFd = dup(FileFd);
- return true;
- }
-
- // Handle 'decompression' of empty files
- if (Comp == false)
- {
- struct stat Buf;
- fstat(FileFd, &Buf);
- if (Buf.st_size == 0 && S_ISFIFO(Buf.st_mode) == false)
- {
- OutFd = FileFd;
- return true;
- }
- }
-
- // Create a data pipe
- int Pipe[2] = {-1,-1};
- if (pipe(Pipe) != 0)
- return _error->Errno("pipe",_("Failed to create subprocess IPC"));
- for (int J = 0; J != 2; J++)
- SetCloseExec(Pipe[J],true);
-
- if (Comp == true)
- OutFd = Pipe[1];
- else
- OutFd = Pipe[0];
-
- // The child..
- pid_t child = ExecFork();
- if (Pid != NULL)
- *Pid = child;
- if (child == 0)
- {
- if (Comp == true)
- {
- dup2(FileFd,STDOUT_FILENO);
- dup2(Pipe[0],STDIN_FILENO);
- }
- else
- {
- dup2(FileFd,STDIN_FILENO);
- dup2(Pipe[1],STDOUT_FILENO);
- }
-
- SetCloseExec(STDOUT_FILENO,false);
- SetCloseExec(STDIN_FILENO,false);
-
- std::vector<char const*> Args;
- Args.push_back(Prog.Binary.c_str());
- std::vector<std::string> const * const addArgs =
- (Comp == true) ? &(Prog.CompressArgs) : &(Prog.UncompressArgs);
- for (std::vector<std::string>::const_iterator a = addArgs->begin();
- a != addArgs->end(); ++a)
- Args.push_back(a->c_str());
- Args.push_back(NULL);
-
- execvp(Args[0],(char **)&Args[0]);
- cerr << _("Failed to exec compressor ") << Args[0] << endl;
- _exit(100);
- }
- if (Comp == true)
- close(Pipe[0]);
- else
- close(Pipe[1]);
-
- if (Pid == NULL)
- ExecWait(child, Prog.Binary.c_str(), true);
-
- return true;
-}
-bool ExecCompressor(APT::Configuration::Compressor const &Prog,
- pid_t *Pid, std::string const &FileName, int &OutFd, bool const Comp)
-{
- if (Pid != NULL)
- *Pid = -1;
-
- // No compression
- if (Prog.Binary.empty() == true)
- {
- if (Comp == true)
- OutFd = open(FileName.c_str(), O_WRONLY, 0666);
- else
- OutFd = open(FileName.c_str(), O_RDONLY);
- return true;
- }
-
- // Handle 'decompression' of empty files
- if (Comp == false)
- {
- struct stat Buf;
- stat(FileName.c_str(), &Buf);
- if (Buf.st_size == 0)
- {
- OutFd = open(FileName.c_str(), O_RDONLY);
- return true;
- }
- }
-
- // Create a data pipe
- int Pipe[2] = {-1,-1};
- if (pipe(Pipe) != 0)
- return _error->Errno("pipe",_("Failed to create subprocess IPC"));
- for (int J = 0; J != 2; J++)
- SetCloseExec(Pipe[J],true);
-
- int FileFd = -1;
- if (Comp == true)
- {
- OutFd = Pipe[1];
- // FIXME: we should handle openmode and permission from Open() here
- FileFd = open(FileName.c_str(), O_WRONLY, 0666);
- }
- else
- OutFd = Pipe[0];
-
- // The child..
- pid_t child = ExecFork();
- if (Pid != NULL)
- *Pid = child;
- if (child == 0)
- {
- if (Comp == true)
- {
- dup2(Pipe[0],STDIN_FILENO);
- dup2(FileFd,STDOUT_FILENO);
- SetCloseExec(STDIN_FILENO,false);
- }
- else
- {
- dup2(Pipe[1],STDOUT_FILENO);
- }
- SetCloseExec(STDOUT_FILENO,false);
-
- std::vector<char const*> Args;
- Args.push_back(Prog.Binary.c_str());
- std::vector<std::string> const * const addArgs =
- (Comp == true) ? &(Prog.CompressArgs) : &(Prog.UncompressArgs);
- for (std::vector<std::string>::const_iterator a = addArgs->begin();
- a != addArgs->end(); ++a)
- Args.push_back(a->c_str());
- if (Comp == false)
- {
- Args.push_back("--stdout");
- Args.push_back(FileName.c_str());
- }
- Args.push_back(NULL);
-
- execvp(Args[0],(char **)&Args[0]);
- cerr << _("Failed to exec compressor ") << Args[0] << endl;
- _exit(100);
- }
- if (Comp == true)
- {
- close(Pipe[0]);
- close(FileFd);
- }
- else
- close(Pipe[1]);
-
- if (Pid == NULL)
- ExecWait(child, Prog.Binary.c_str(), false);
-
- return true;
-}
- /*}}}*/
-
projects / apt.git / blobdiff