1 files changed, 105 insertions, 0 deletions
diff --git a/apt-pkg/deb/dpkginit.cc b/apt-pkg/deb/dpkginit.cc
new file mode 100644
index 000000000..095156d0d
--- /dev/null
+++ b/apt-pkg/deb/dpkginit.cc
@@ -0,0 +1,105 @@
+// -*- mode: cpp; mode: fold -*-
+// Description								/*{{{*/
+// $Id: dpkginit.cc,v 1.1 1998/11/23 07:03:10 jgg Exp $
+/* ######################################################################
+
+   DPKG init - Initialize the dpkg stuff
+
+   ##################################################################### */
+									/*}}}*/
+// Includes								/*{{{*/
+#ifdef __GNUG__
+#pragma implementation "apt-pkg/dpkginit.h"
+#endif
+#include <apt-pkg/dpkginit.h>
+#include <apt-pkg/error.h>
+#include <apt-pkg/configuration.h>
+#include <apt-pkg/fileutl.h>
+
+#include <sys/types.h>
+#include <unistd.h>
+#include <dirent.h>
+									/*}}}*/
+
+// DpkgLock::pkgDpkgLock - Constructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgDpkgLock::pkgDpkgLock()
+{
+   LockFD = -1;
+   GetLock();
+}
+									/*}}}*/
+// DpkgLock::~pkgDpkgLock - Destructor					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+pkgDpkgLock::~pkgDpkgLock()
+{
+   Close();
+}
+									/*}}}*/
+// DpkgLock::GetLock - Get the lock					/*{{{*/
+// ---------------------------------------------------------------------
+/* This mirrors the operations dpkg does when it starts up. Note the
+   checking of the updates directory. */
+bool pkgDpkgLock::GetLock()
+{
+   // Disable file locking
+   if (_config->FindB("Debug::NoLocking",false) == true)
+      return true;
+   
+   Close();
+   
+   // Create the lockfile
+   string AdminDir = flNotFile(_config->Find("Dir::State::status"));
+   LockFD = ::GetLock(AdminDir + "lock");
+   if (LockFD == -1)
+      return _error->Errno("Open","Unable to lock the administration directory "
+			   "%s, are you root?",AdminDir.c_str());
+   
+   // Check for updates.. (dirty)
+   string File = AdminDir + "updates/";
+   DIR *DirP = opendir(File.c_str());
+   if (DirP != 0)
+   {
+      /* 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);
+       	 
+      // Woops, we have to run dpkg to rewrite the status file
+      if (Damaged == true)
+      {
+	 Close();
+	 return _error->Error("dpkg was interrupted, you must manually "
+			      "run 'dpkg --configure -a' to correct the problem. ");
+      }
+   }
+   
+   return true;
+}
+									/*}}}*/
+// DpkgLock::Close - Close the lock					/*{{{*/
+// ---------------------------------------------------------------------
+/* */
+void pkgDpkgLock::Close()
+{
+   close(LockFD);
+   LockFD = -1;
+}
+									/*}}}*/