X-Git-Url: https://git.saurik.com/apt.git/blobdiff_plain/8b89e57fa2ae7d34b055b8f804cee0c2c194043b..cbb1005a0a2e026e4a7361b0ff86888af192ee85:/methods/gzip.cc diff --git a/methods/gzip.cc b/methods/gzip.cc index 84ad472e9..387c05f2e 100644 --- a/methods/gzip.cc +++ b/methods/gzip.cc @@ -1,6 +1,6 @@ // -*- mode: cpp; mode: fold -*- // Description /*{{{*/ -// $Id: gzip.cc,v 1.2 1998/10/26 07:11:53 jgg Exp $ +// $Id: gzip.cc,v 1.17.2.1 2004/01/16 18:58:50 mdz Exp $ /* ###################################################################### GZip method - Take a file URI in and decompress it into the target @@ -9,179 +9,146 @@ ##################################################################### */ /*}}}*/ // Include Files /*{{{*/ -#include -#include +#include + #include -#include -#include +#include +#include +#include +#include +#include +#include +#include #include -#include -#include -#include -#include +#include +#include +#include + +#include /*}}}*/ -// Fail - Generate a failure message /*{{{*/ -// --------------------------------------------------------------------- -/* */ -void Fail(string URI) +const char *Prog; + +class GzipMethod : public pkgAcqMethod { - string Err = "Undetermined Error"; - if (_error->empty() == false) - _error->PopMessage(Err); + virtual bool Fetch(FetchItem *Itm); + virtual bool Configuration(std::string Message); + + public: - printf("400 URI Failure\n" - "URI: %s\n" - "Message: %s\n\n",URI.c_str(),Err.c_str()); - _error->Discard(); + GzipMethod() : pkgAcqMethod("1.1",SingleInstance | SendConfig) {}; +}; + +bool GzipMethod::Configuration(std::string Message) +{ + if (pkgAcqMethod::Configuration(Message) == false) + return false; + + DropPrivsOrDie(); + + return true; } - /*}}}*/ -int main() +// GzipMethod::Fetch - Decompress the passed URI /*{{{*/ +// --------------------------------------------------------------------- +/* */ +bool GzipMethod::Fetch(FetchItem *Itm) { - setlinebuf(stdout); - SetNonBlock(STDIN_FILENO,true); + URI Get = Itm->Uri; + std::string Path = Get.Host + Get.Path; // To account for relative paths - printf("100 Capabilities\n" - "Version: 1.0\n" - "Pipeline: true\n" - "Send-Config: true\n\n"); + FetchResult Res; + Res.Filename = Itm->DestFile; + URIStart(Res); - vector Messages; - while (1) + std::vector const compressors = APT::Configuration::getCompressors(); + std::vector::const_iterator compressor = compressors.begin(); + for (; compressor != compressors.end(); ++compressor) + if (compressor->Name == Prog) + break; + if (compressor == compressors.end()) + return _error->Error("Extraction of file %s requires unknown compressor %s", Path.c_str(), Prog); + + // Open the source and destination files + FileFd From, To; + if (_config->FindB("Method::Compress", false) == false) { - if (WaitFd(STDIN_FILENO) == false || - ReadMessages(STDIN_FILENO,Messages) == false) - return 0; + From.Open(Path, FileFd::ReadOnly, *compressor); + if(From.FileSize() == 0) + return _error->Error(_("Empty files can't be valid archives")); + To.Open(Itm->DestFile, FileFd::WriteAtomic); + } + else + { + From.Open(Path, FileFd::ReadOnly); + To.Open(Itm->DestFile, FileFd::WriteOnly | FileFd::Create | FileFd::Empty, *compressor); + } + To.EraseOnFailure(); + + if (From.IsOpen() == false || From.Failed() == true || + To.IsOpen() == false || To.Failed() == true) + return false; - while (Messages.empty() == false) + // Read data from source, generate checksums and write + Hashes Hash; + bool Failed = false; + while (1) + { + unsigned char Buffer[4*1024]; + unsigned long long Count = 0; + + if (!From.Read(Buffer,sizeof(Buffer),&Count)) { - string Message = Messages.front(); - Messages.erase(Messages.begin()); - - // Fetch the message number - char *End; - int Number = strtol(Message.c_str(),&End,10); - if (End == Message.c_str()) - { - cerr << "Malformed message!" << endl; - return 100; - } - - // 601 configuration message - if (Number == 601) - { - pkgInjectConfiguration(Message,*_config); - continue; - } - - // 600 URI Fetch message - if (Number != 600) - continue; - - // Grab the URI bit - string URI = LookupTag(Message,"URI"); - string Target = LookupTag(Message,"Filename"); - - // Grab the filename - string::size_type Pos = URI.find(':'); - if (Pos == string::npos) - { - _error->Error("Invalid message"); - Fail(URI); - continue; - } - string File = string(URI,Pos+1); - - // Start the reply message - string Result = "201 URI Done"; - Result += "\nURI: " + URI; - Result += "\nFileName: " + Target; - - // See if the file exists - FileFd From(File,FileFd::ReadOnly); - FileFd To(Target,FileFd::WriteEmpty); - To.EraseOnFailure(); - if (_error->PendingError() == true) - { - Fail(URI); - continue; - } - - // Fork gzip - int Process = fork(); - if (Process < 0) - { - _error->Errno("fork","Couldn't fork gzip"); - Fail(URI); - continue; - } - - // The child - if (Process == 0) - { - dup2(From.Fd(),STDIN_FILENO); - dup2(To.Fd(),STDOUT_FILENO); - From.Close(); - To.Close(); - SetCloseExec(STDIN_FILENO,false); - SetCloseExec(STDOUT_FILENO,false); - - const char *Args[3]; - Args[0] = _config->Find("Dir::bin::gzip","gzip").c_str(); - Args[1] = "-d"; - Args[2] = 0; - execvp(Args[0],(char **)Args); - exit(100); - } - From.Close(); - - // Wait for gzip to finish - int Status; - if (waitpid(Process,&Status,0) != Process) - { - To.OpFail(); - _error->Errno("wait","Waiting for gzip failed"); - Fail(URI); - continue; - } - - if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0) - { - To.OpFail(); - _error->Error("gzip failed, perhaps the disk is full or the directory permissions are wrong."); - Fail(URI); - continue; - } - - To.Close(); - - // Transfer the modification times - struct stat Buf; - if (stat(File.c_str(),&Buf) != 0) - { - _error->Errno("stat","Failed to stat"); - Fail(URI); - continue; - } - struct utimbuf TimeBuf; - TimeBuf.actime = Buf.st_atime; - TimeBuf.modtime = Buf.st_mtime; - if (utime(Target.c_str(),&TimeBuf) != 0) - { - _error->Errno("utime","Failed to set modification time"); - Fail(URI); - continue; - } - - // Send the message - Result += "\n\n"; - if (write(STDOUT_FILENO,Result.begin(),Result.length()) != - (signed)Result.length()) - return 100; + To.OpFail(); + return false; + } + if (Count == 0) + break; + + Hash.Add(Buffer,Count); + if (To.Write(Buffer,Count) == false) + { + Failed = true; + break; } } - return 0; + From.Close(); + Res.Size = To.FileSize(); + To.Close(); + + if (Failed == true) + return false; + + // Transfer the modification times + struct stat Buf; + if (stat(Path.c_str(),&Buf) != 0) + return _error->Errno("stat",_("Failed to stat")); + + struct timeval times[2]; + times[0].tv_sec = Buf.st_atime; + Res.LastModified = times[1].tv_sec = Buf.st_mtime; + times[0].tv_usec = times[1].tv_usec = 0; + if (utimes(Itm->DestFile.c_str(), times) != 0) + return _error->Errno("utimes",_("Failed to set modification time")); + + // Return a Done response + Res.TakeHashes(Hash); + + URIDone(Res); + return true; +} + /*}}}*/ + +int main(int, char *argv[]) +{ + setlocale(LC_ALL, ""); + + Prog = strrchr(argv[0],'/'); + ++Prog; + + GzipMethod Mth; + + return Mth.Run(); }