diff options
Diffstat (limited to 'apt-pkg/deb/debsystem.cc')
| -rw-r--r-- | apt-pkg/deb/debsystem.cc | 197 |
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; +} + /*}}}*/ |