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authorArch Librarian <arch@canonical.com>2004-09-20 16:56:32 +0000
committerArch Librarian <arch@canonical.com>2004-09-20 16:56:32 +0000
commitb2e465d6d32d2dc884f58b94acb7e35f671a87fe (patch)
tree5928383b9bde7b0ba9812e6526ad746466e558f7 /apt-pkg/deb/debsystem.cc
parent00b47c98ca4a4349686a082eba6d77decbb03a4d (diff)
Join with aliencode
Author: jgg Date: 2001-02-20 07:03:16 GMT Join with aliencode
Diffstat (limited to 'apt-pkg/deb/debsystem.cc')
-rw-r--r--apt-pkg/deb/debsystem.cc197
1 files changed, 197 insertions, 0 deletions
diff --git a/apt-pkg/deb/debsystem.cc b/apt-pkg/deb/debsystem.cc
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+// -*- 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;
+}
+ /*}}}*/