gzip method

Author: jgg
Date: 1998-10-25 07:07:29 GMT
gzip method

diff --git a/methods/copy.cc b/methods/copy.cc
index 68253a64c88e056cbc312e8959fc1ac215748cca..c1cc26a6918c0c47694877602ba0d455c8173783 100644 (file)
--- a/methods/copy.cc
+++ b/methods/copy.cc
@@ -1,10 +1,10 @@
 // -*- mode: cpp; mode: fold -*-
 // Description                                                         /*{{{*/
-// $Id: copy.cc,v 1.1 1998/10/25 01:57:07 jgg Exp $
+// $Id: copy.cc,v 1.2 1998/10/25 07:07:29 jgg Exp $
 /* ######################################################################
 
    Copy URI - This method takes a uri like a file: uri and copies it
-   to the destination URI.
+   to the destination file.
    
    ##################################################################### */
                                                                        /*}}}*/
@@ -14,6 +14,7 @@
 #include <apt-pkg/error.h>
 
 #include <sys/stat.h>
+#include <utime.h>
 #include <unistd.h>
 #include <stdio.h>
                                                                        /*}}}*/
@@ -103,7 +104,28 @@ int main()
            Fail(URI);
            continue;
         }       
+       
+        From.Close();
+        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()) != 

diff --git a/methods/gzip.cc b/methods/gzip.cc
new file mode 100644 (file)
index 0000000..15bff4d
--- /dev/null
+++ b/methods/gzip.cc
@@ -0,0 +1,179 @@
+// -*- mode: cpp; mode: fold -*-
+// Description                                                         /*{{{*/
+// $Id: gzip.cc,v 1.1 1998/10/25 07:07:30 jgg Exp $
+/* ######################################################################
+
+   GZip method - Take a file URI in and decompress it into the target 
+   file.
+   
+   ##################################################################### */
+                                                                       /*}}}*/
+// 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 <sys/stat.h>
+#include <unistd.h>
+#include <utime.h>
+#include <wait.h>
+#include <stdio.h>
+                                                                       /*}}}*/
+
+// Fail - Generate a failure message                                   /*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void Fail(string URI)
+{
+   string Err = "Undetermined Error";
+   if (_error->empty() == false)
+      _error->PopMessage(Err);
+   
+   printf("400 URI Failure\n"
+         "URI: %s\n"
+         "Message: %s\n\n",URI.c_str(),Err.c_str());
+   _error->Discard();
+}
+                                                                       /*}}}*/
+
+int main()
+{
+   setlinebuf(stdout);
+   SetNonBlock(STDIN_FILENO,true);
+   
+   printf("100 Capabilities\n"
+         "Version: 1.0\n"
+         "Pipeline: true\n"
+         "Send-Config: true\n\n");
+
+   vector<string> Messages;   
+   while (1)
+   {
+      if (WaitFd(STDIN_FILENO) == false ||
+         ReadMessages(STDIN_FILENO,Messages) == false)
+        return 0;
+
+      while (Messages.empty() == false)
+      {
+        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;
+      }      
+   }
+   
+   return 0;
+}

diff --git a/methods/makefile b/methods/makefile
index ac76b56d9915a75c683c0f7cfe0c6f9210341755..1656f57003857c4ce471eb6817007d306bec13ce 100644 (file)
--- a/methods/makefile
+++ b/methods/makefile
@@ -17,3 +17,9 @@ PROGRAM=copy
 SLIBS = -lapt-pkg 
 SOURCE = copy.cc
 include $(PROGRAM_H)
+
+# The gzip method
+PROGRAM=gzip
+SLIBS = -lapt-pkg 
+SOURCE = gzip.cc
+include $(PROGRAM_H)