// -*- mode: cpp; mode: fold -*-
// Description /*{{{*/
-// $Id: gzip.cc,v 1.1 1998/10/25 07:07:30 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
// Include Files /*{{{*/
#include <apt-pkg/fileutl.h>
#include <apt-pkg/error.h>
-#include <apt-pkg/configuration.h>
-#include <apt-pkg/acquire-worker.h>
-#include <strutl.h>
+#include <apt-pkg/acquire-method.h>
+#include <apt-pkg/strutl.h>
+#include <apt-pkg/hashes.h>
#include <sys/stat.h>
#include <unistd.h>
#include <utime.h>
-#include <wait.h>
#include <stdio.h>
+#include <errno.h>
+#include <apti18n.h>
/*}}}*/
-// Fail - Generate a failure message /*{{{*/
+const char *Prog;
+
+class GzipMethod : public pkgAcqMethod
+{
+ virtual bool Fetch(FetchItem *Itm);
+
+ public:
+
+ GzipMethod() : pkgAcqMethod("1.1",SingleInstance | SendConfig) {};
+};
+
+
+// GzipMethod::Fetch - Decompress the passed URI /*{{{*/
// ---------------------------------------------------------------------
/* */
-void Fail(string URI)
+bool GzipMethod::Fetch(FetchItem *Itm)
{
- string Err = "Undetermined Error";
- if (_error->empty() == false)
- _error->PopMessage(Err);
+ URI Get = Itm->Uri;
+ string Path = Get.Host + Get.Path; // To account for relative paths
- printf("400 URI Failure\n"
- "URI: %s\n"
- "Message: %s\n\n",URI.c_str(),Err.c_str());
- _error->Discard();
-}
- /*}}}*/
+ string GzPathOption = "Dir::bin::"+string(Prog);
-int main()
-{
- setlinebuf(stdout);
- SetNonBlock(STDIN_FILENO,true);
+ FetchResult Res;
+ Res.Filename = Itm->DestFile;
+ URIStart(Res);
- printf("100 Capabilities\n"
- "Version: 1.0\n"
- "Pipeline: true\n"
- "Send-Config: true\n\n");
+ // Open the source and destination files
+ FileFd From(Path,FileFd::ReadOnly);
- vector<string> Messages;
- while (1)
+ // if the file is empty, just rename it and return
+ if(From.Size() == 0)
{
- if (WaitFd(STDIN_FILENO) == false ||
- ReadMessages(STDIN_FILENO,Messages) == false)
- return 0;
+ rename(Path.c_str(), Itm->DestFile.c_str());
+ return true;
+ }
- while (Messages.empty() == false)
+ int GzOut[2];
+ if (pipe(GzOut) < 0)
+ return _error->Errno("pipe",_("Couldn't open pipe for %s"),Prog);
+
+ // Fork gzip
+ pid_t Process = ExecFork();
+ if (Process == 0)
+ {
+ close(GzOut[0]);
+ dup2(From.Fd(),STDIN_FILENO);
+ dup2(GzOut[1],STDOUT_FILENO);
+ From.Close();
+ close(GzOut[1]);
+ SetCloseExec(STDIN_FILENO,false);
+ SetCloseExec(STDOUT_FILENO,false);
+
+ const char *Args[3];
+ string Tmp = _config->Find(GzPathOption,Prog);
+ Args[0] = Tmp.c_str();
+ Args[1] = "-d";
+ Args[2] = 0;
+ execvp(Args[0],(char **)Args);
+ _exit(100);
+ }
+ From.Close();
+ close(GzOut[1]);
+
+ FileFd FromGz(GzOut[0]); // For autoclose
+ FileFd To(Itm->DestFile,FileFd::WriteEmpty);
+ To.EraseOnFailure();
+ if (_error->PendingError() == true)
+ return false;
+
+ // Read data from gzip, generate checksums and write
+ Hashes Hash;
+ bool Failed = false;
+ while (1)
+ {
+ unsigned char Buffer[4*1024];
+ unsigned long Count;
+
+ Count = read(GzOut[0],Buffer,sizeof(Buffer));
+ if (Count < 0 && errno == EINTR)
+ continue;
+
+ if (Count < 0)
{
- 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);
-
- const char *Args[3];
- Args[0] = _config->FindFile("Dir::bin::gzip","gzip").c_str();
- Args[1] = "-d";
- Args[2] = 0;
- execvp(Args[0],(char **)Args);
- }
- From.Close();
- To.Close();
-
- // Wait for gzip to finish
- int Status;
- if (waitpid(Process,&Status,0) != Process)
- {
- _error->Errno("wait","Waiting for gzip failed");
- Fail(URI);
- continue;
- }
-
- if (WIFEXITED(Status) == 0 || WEXITSTATUS(Status) != 0)
- {
- _error->Error("gzip failed, perhaps the disk is full or the directory permissions are wrong.");
- Fail(URI);
- continue;
- }
-
- // 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;
+ _error->Errno("read", _("Read error from %s process"),Prog);
+ Failed = true;
+ break;
+ }
+
+ if (Count == 0)
+ break;
+
+ Hash.Add(Buffer,Count);
+ if (To.Write(Buffer,Count) == false)
+ {
+ Failed = true;
+ FromGz.Close();
+ break;
}
}
- return 0;
+ // Wait for gzip to finish
+ if (ExecWait(Process,_config->Find(GzPathOption,Prog).c_str(),false) == false)
+ {
+ To.OpFail();
+ return false;
+ }
+
+ 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 utimbuf TimeBuf;
+ TimeBuf.actime = Buf.st_atime;
+ TimeBuf.modtime = Buf.st_mtime;
+ if (utime(Itm->DestFile.c_str(),&TimeBuf) != 0)
+ return _error->Errno("utime",_("Failed to set modification time"));
+
+ if (stat(Itm->DestFile.c_str(),&Buf) != 0)
+ return _error->Errno("stat",_("Failed to stat"));
+
+ // Return a Done response
+ Res.LastModified = Buf.st_mtime;
+ Res.Size = Buf.st_size;
+ Res.TakeHashes(Hash);
+
+ URIDone(Res);
+
+ return true;
+}
+ /*}}}*/
+
+int main(int argc, char *argv[])
+{
+ setlocale(LC_ALL, "");
+
+ GzipMethod Mth;
+
+ Prog = strrchr(argv[0],'/');
+ Prog++;
+
+ return Mth.Run();
}
projects / apt.git / blobdiff