Join with aliencode

Author: jgg
Date: 2001-02-20 07:03:16 GMT
Join with aliencode

1 files changed, 197 insertions, 0 deletions

diff --git a/apt-pkg/deb/debsystem.cc b/apt-pkg/deb/debsystem.cc
new file mode 100644
index 000000000..0abd4c8aa
--- /dev/null
+++ b/apt-pkg/deb/debsystem.cc
@@ -0,0 +1,197 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: debsystem.cc,v 1.2 2001/02/20 07:03:17 jgg Exp $
+/* ######################################################################
+
+   System - Abstraction for running on different systems.
+
+   Basic general structure..
+   
+   ##################################################################### */
+									/*}}}*/
+// Include Files							/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/debsystem.h"
+#endif
+
+#include <apt-pkg/debsystem.h>
+#include <apt-pkg/debversion.h>
+#include <apt-pkg/debindexfile.h>
+#include <apt-pkg/dpkgpm.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/fileutl.h>
+    
+#include <sys/types.h>
+#include <unistd.h>
+#include <dirent.h>
+#include <errno.h>
+									/*}}}*/
+
+debSystem debSys;
+
+// System::debSystem - Constructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+debSystem::debSystem()
+{
+   LockFD = -1;
+   LockCount = 0;
+   
+   Label = "Debian dpkg interface";
+   VS = &debVS;
+}
+									/*}}}*/
+// System::Lock - Get the lock						/*{{{*/
+// ---------------------------------------------------------------------
+/* This mirrors the operations dpkg does when it starts up. Note the
+   checking of the updates directory. */
+bool debSystem::Lock()
+{
+   // Disable file locking
+   if (_config->FindB("Debug::NoLocking",false) == true || LockCount > 1)
+   {
+      LockCount++;
+      return true;
+   }
+
+   // Create the lockfile
+   string AdminDir = flNotFile(_config->Find("Dir::State::status"));
+   LockFD = GetLock(AdminDir + "lock");
+   if (LockFD == -1)
+   {
+      if (errno == EACCES || errno == EAGAIN)
+	 return _error->Error("Unable to lock the administration directory (%s), "
+			      "is another process using it?",AdminDir.c_str());
+      else
+	 return _error->Error("Unable to lock the administration directory (%s), "
+			      "are you root?",AdminDir.c_str());
+   }
+   
+   // See if we need to abort with a dirty journal
+   if (CheckUpdates() == true)
+   {
+      close(LockFD);
+      LockFD = -1;
+      return _error->Error("dpkg was interrupted, you must manually "
+			   "run 'dpkg --configure -a' to correct the problem. ");
+   }
+
+	 LockCount++;
+      
+   return true;
+}
+									/*}}}*/
+// System::UnLock - Drop a lock						/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debSystem::UnLock(bool NoErrors)
+{
+   if (LockCount == 0 && NoErrors == true)
+      return false;
+   
+   if (LockCount < 1)
+      return _error->Error("Not locked");
+   if (--LockCount == 0)
+   {
+      close(LockFD);
+      LockCount = 0;
+   }
+   
+   return true;
+}
+									/*}}}*/
+// System::CheckUpdates - Check if the updates dir is dirty		/*{{{*/
+// ---------------------------------------------------------------------
+/* This does a check of the updates directory (dpkg journal) to see if it has 
+   any entries in it. */
+bool debSystem::CheckUpdates()
+{
+   // Check for updates.. (dirty)
+   string File = flNotFile(_config->Find("Dir::State::status")) + "updates/";
+   DIR *DirP = opendir(File.c_str());
+   if (DirP == 0)
+      return false;
+   
+   /* We ignore any files that are not all digits, this skips .,.. and 
+      some tmp files dpkg will leave behind.. */
+   bool Damaged = false;
+   for (struct dirent *Ent = readdir(DirP); Ent != 0; Ent = readdir(DirP))
+   {
+      Damaged = true;
+      for (unsigned int I = 0; Ent->d_name[I] != 0; I++)
+      {
+	 // Check if its not a digit..
+	 if (isdigit(Ent->d_name[I]) == 0)
+	 {
+	    Damaged = false;
+	    break;
+	 }
+      }
+      if (Damaged == true)
+	 break;
+   }
+   closedir(DirP);
+
+   return Damaged;
+}
+									/*}}}*/
+// System::CreatePM - Create the underlying package manager		/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgPackageManager *debSystem::CreatePM(pkgDepCache *Cache) const
+{
+   return new pkgDPkgPM(Cache);
+}
+									/*}}}*/
+// System::Initialize - Setup the configuration space..			/*{{{*/
+// ---------------------------------------------------------------------
+/* These are the Debian specific configuration variables.. */
+bool debSystem::Initialize(Configuration &Cnf)
+{
+   /* These really should be jammed into a generic 'Local Database' engine
+      which is yet to be determined. The functions in pkgcachegen should
+      be the only users of these */
+   Cnf.CndSet("Dir::State::userstatus","status.user"); // Defunct
+   Cnf.CndSet("Dir::State::status","/var/lib/dpkg/status");
+   Cnf.CndSet("Dir::Bin::dpkg","/usr/bin/dpkg");
+   
+   return true;
+}
+									/*}}}*/
+// System::ArchiveSupported - Is a file format supported		/*{{{*/
+// ---------------------------------------------------------------------
+/* The standard name for a deb is 'deb'.. There are no seperate versions
+   of .deb to worry about.. */
+bool debSystem::ArchiveSupported(const char *Type)
+{
+   if (strcmp(Type,"deb") == 0)
+      return true;
+   return false;
+}
+									/*}}}*/
+// System::Score - Determine how 'Debiany' this sys is..		/*{{{*/
+// ---------------------------------------------------------------------
+/* We check some files that are sure tell signs of this being a Debian
+   System.. */
+signed debSystem::Score(Configuration const &Cnf)
+{
+   signed Score = 0;
+   if (FileExists(Cnf.FindFile("Dir::State::status","/var/lib/dpkg/status")) == true)
+       Score += 10;
+   if (FileExists(Cnf.FindFile("Dir::Bin::dpkg","/usr/bin/dpkg")) == true)
+      Score += 10;
+   if (FileExists("/etc/debian_version") == true)
+      Score += 10;
+   return Score;
+}
+									/*}}}*/
+// System::AddStatusFiles - Register the status files			/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+bool debSystem::AddStatusFiles(vector<pkgIndexFile *> &List)
+{
+   List.push_back(new debStatusIndex(_config->FindFile("Dir::State::status")));
+   return true;
+}
+									/*}}}*/