| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: debsystem.cc,v 1.4 2004/01/26 17:01:53 mdz Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | System - Abstraction for running on different systems. |
| 7 | |
| 8 | Basic general structure.. |
| 9 | |
| 10 | ##################################################################### */ |
| 11 | /*}}}*/ |
| 12 | // Include Files /*{{{*/ |
| 13 | #include <config.h> |
| 14 | |
| 15 | #include <apt-pkg/debsystem.h> |
| 16 | #include <apt-pkg/debversion.h> |
| 17 | #include <apt-pkg/debindexfile.h> |
| 18 | #include <apt-pkg/dpkgpm.h> |
| 19 | #include <apt-pkg/configuration.h> |
| 20 | #include <apt-pkg/error.h> |
| 21 | #include <apt-pkg/fileutl.h> |
| 22 | #include <apt-pkg/pkgcache.h> |
| 23 | #include <apt-pkg/cacheiterators.h> |
| 24 | |
| 25 | #include <ctype.h> |
| 26 | #include <stdlib.h> |
| 27 | #include <string.h> |
| 28 | #include <string> |
| 29 | #include <vector> |
| 30 | #include <unistd.h> |
| 31 | #include <dirent.h> |
| 32 | #include <errno.h> |
| 33 | |
| 34 | #include <apti18n.h> |
| 35 | /*}}}*/ |
| 36 | |
| 37 | using std::string; |
| 38 | |
| 39 | debSystem debSys; |
| 40 | |
| 41 | class debSystemPrivate { |
| 42 | public: |
| 43 | debSystemPrivate() : LockFD(-1), LockCount(0), StatusFile(0) |
| 44 | { |
| 45 | } |
| 46 | // For locking support |
| 47 | int LockFD; |
| 48 | unsigned LockCount; |
| 49 | |
| 50 | debStatusIndex *StatusFile; |
| 51 | }; |
| 52 | |
| 53 | // System::debSystem - Constructor /*{{{*/ |
| 54 | // --------------------------------------------------------------------- |
| 55 | /* */ |
| 56 | debSystem::debSystem() |
| 57 | { |
| 58 | d = new debSystemPrivate(); |
| 59 | Label = "Debian dpkg interface"; |
| 60 | VS = &debVS; |
| 61 | } |
| 62 | /*}}}*/ |
| 63 | // System::~debSystem - Destructor /*{{{*/ |
| 64 | // --------------------------------------------------------------------- |
| 65 | /* */ |
| 66 | debSystem::~debSystem() |
| 67 | { |
| 68 | delete d->StatusFile; |
| 69 | delete d; |
| 70 | } |
| 71 | /*}}}*/ |
| 72 | // System::Lock - Get the lock /*{{{*/ |
| 73 | // --------------------------------------------------------------------- |
| 74 | /* This mirrors the operations dpkg does when it starts up. Note the |
| 75 | checking of the updates directory. */ |
| 76 | bool debSystem::Lock() |
| 77 | { |
| 78 | // Disable file locking |
| 79 | if (_config->FindB("Debug::NoLocking",false) == true || d->LockCount > 1) |
| 80 | { |
| 81 | d->LockCount++; |
| 82 | return true; |
| 83 | } |
| 84 | |
| 85 | // Create the lockfile |
| 86 | string AdminDir = flNotFile(_config->Find("Dir::State::status")); |
| 87 | d->LockFD = GetLock(AdminDir + "lock"); |
| 88 | if (d->LockFD == -1) |
| 89 | { |
| 90 | if (errno == EACCES || errno == EAGAIN) |
| 91 | return _error->Error(_("Unable to lock the administration directory (%s), " |
| 92 | "is another process using it?"),AdminDir.c_str()); |
| 93 | else |
| 94 | return _error->Error(_("Unable to lock the administration directory (%s), " |
| 95 | "are you root?"),AdminDir.c_str()); |
| 96 | } |
| 97 | |
| 98 | // See if we need to abort with a dirty journal |
| 99 | if (CheckUpdates() == true) |
| 100 | { |
| 101 | close(d->LockFD); |
| 102 | d->LockFD = -1; |
| 103 | const char *cmd; |
| 104 | if (getenv("SUDO_USER") != NULL) |
| 105 | cmd = "sudo dpkg --configure -a"; |
| 106 | else |
| 107 | cmd = "dpkg --configure -a"; |
| 108 | // TRANSLATORS: the %s contains the recovery command, usually |
| 109 | // dpkg --configure -a |
| 110 | return _error->Error(_("dpkg was interrupted, you must manually " |
| 111 | "run '%s' to correct the problem. "), cmd); |
| 112 | } |
| 113 | |
| 114 | d->LockCount++; |
| 115 | |
| 116 | return true; |
| 117 | } |
| 118 | /*}}}*/ |
| 119 | // System::UnLock - Drop a lock /*{{{*/ |
| 120 | // --------------------------------------------------------------------- |
| 121 | /* */ |
| 122 | bool debSystem::UnLock(bool NoErrors) |
| 123 | { |
| 124 | if (d->LockCount == 0 && NoErrors == true) |
| 125 | return false; |
| 126 | |
| 127 | if (d->LockCount < 1) |
| 128 | return _error->Error(_("Not locked")); |
| 129 | if (--d->LockCount == 0) |
| 130 | { |
| 131 | close(d->LockFD); |
| 132 | d->LockCount = 0; |
| 133 | } |
| 134 | |
| 135 | return true; |
| 136 | } |
| 137 | /*}}}*/ |
| 138 | // System::CheckUpdates - Check if the updates dir is dirty /*{{{*/ |
| 139 | // --------------------------------------------------------------------- |
| 140 | /* This does a check of the updates directory (dpkg journal) to see if it has |
| 141 | any entries in it. */ |
| 142 | bool debSystem::CheckUpdates() |
| 143 | { |
| 144 | // Check for updates.. (dirty) |
| 145 | string File = flNotFile(_config->Find("Dir::State::status")) + "updates/"; |
| 146 | DIR *DirP = opendir(File.c_str()); |
| 147 | if (DirP == 0) |
| 148 | return false; |
| 149 | |
| 150 | /* We ignore any files that are not all digits, this skips .,.. and |
| 151 | some tmp files dpkg will leave behind.. */ |
| 152 | bool Damaged = false; |
| 153 | for (struct dirent *Ent = readdir(DirP); Ent != 0; Ent = readdir(DirP)) |
| 154 | { |
| 155 | Damaged = true; |
| 156 | for (unsigned int I = 0; Ent->d_name[I] != 0; I++) |
| 157 | { |
| 158 | // Check if its not a digit.. |
| 159 | if (isdigit(Ent->d_name[I]) == 0) |
| 160 | { |
| 161 | Damaged = false; |
| 162 | break; |
| 163 | } |
| 164 | } |
| 165 | if (Damaged == true) |
| 166 | break; |
| 167 | } |
| 168 | closedir(DirP); |
| 169 | |
| 170 | return Damaged; |
| 171 | } |
| 172 | /*}}}*/ |
| 173 | // System::CreatePM - Create the underlying package manager /*{{{*/ |
| 174 | // --------------------------------------------------------------------- |
| 175 | /* */ |
| 176 | pkgPackageManager *debSystem::CreatePM(pkgDepCache *Cache) const |
| 177 | { |
| 178 | return new pkgDPkgPM(Cache); |
| 179 | } |
| 180 | /*}}}*/ |
| 181 | // System::Initialize - Setup the configuration space.. /*{{{*/ |
| 182 | // --------------------------------------------------------------------- |
| 183 | /* These are the Debian specific configuration variables.. */ |
| 184 | bool debSystem::Initialize(Configuration &Cnf) |
| 185 | { |
| 186 | /* These really should be jammed into a generic 'Local Database' engine |
| 187 | which is yet to be determined. The functions in pkgcachegen should |
| 188 | be the only users of these */ |
| 189 | Cnf.CndSet("Dir::State::extended_states", "extended_states"); |
| 190 | Cnf.CndSet("Dir::State::status","/var/lib/dpkg/status"); |
| 191 | Cnf.CndSet("Dir::Bin::dpkg","/usr/bin/dpkg"); |
| 192 | |
| 193 | if (d->StatusFile) { |
| 194 | delete d->StatusFile; |
| 195 | d->StatusFile = 0; |
| 196 | } |
| 197 | |
| 198 | return true; |
| 199 | } |
| 200 | /*}}}*/ |
| 201 | // System::ArchiveSupported - Is a file format supported /*{{{*/ |
| 202 | // --------------------------------------------------------------------- |
| 203 | /* The standard name for a deb is 'deb'.. There are no separate versions |
| 204 | of .deb to worry about.. */ |
| 205 | APT_PURE bool debSystem::ArchiveSupported(const char *Type) |
| 206 | { |
| 207 | if (strcmp(Type,"deb") == 0) |
| 208 | return true; |
| 209 | return false; |
| 210 | } |
| 211 | /*}}}*/ |
| 212 | // System::Score - Determine how 'Debiany' this sys is.. /*{{{*/ |
| 213 | // --------------------------------------------------------------------- |
| 214 | /* We check some files that are sure tell signs of this being a Debian |
| 215 | System.. */ |
| 216 | signed debSystem::Score(Configuration const &Cnf) |
| 217 | { |
| 218 | signed Score = 0; |
| 219 | if (FileExists(Cnf.FindFile("Dir::State::status","/var/lib/dpkg/status")) == true) |
| 220 | Score += 10; |
| 221 | if (FileExists(Cnf.FindFile("Dir::Bin::dpkg","/usr/bin/dpkg")) == true) |
| 222 | Score += 10; |
| 223 | if (FileExists("/etc/debian_version") == true) |
| 224 | Score += 10; |
| 225 | return Score; |
| 226 | } |
| 227 | /*}}}*/ |
| 228 | // System::AddStatusFiles - Register the status files /*{{{*/ |
| 229 | // --------------------------------------------------------------------- |
| 230 | /* */ |
| 231 | bool debSystem::AddStatusFiles(std::vector<pkgIndexFile *> &List) |
| 232 | { |
| 233 | if (d->StatusFile == 0) |
| 234 | d->StatusFile = new debStatusIndex(_config->FindFile("Dir::State::status")); |
| 235 | List.push_back(d->StatusFile); |
| 236 | return true; |
| 237 | } |
| 238 | /*}}}*/ |
| 239 | // System::FindIndex - Get an index file for status files /*{{{*/ |
| 240 | // --------------------------------------------------------------------- |
| 241 | /* */ |
| 242 | bool debSystem::FindIndex(pkgCache::PkgFileIterator File, |
| 243 | pkgIndexFile *&Found) const |
| 244 | { |
| 245 | if (d->StatusFile == 0) |
| 246 | return false; |
| 247 | if (d->StatusFile->FindInCache(*File.Cache()) == File) |
| 248 | { |
| 249 | Found = d->StatusFile; |
| 250 | return true; |
| 251 | } |
| 252 | |
| 253 | return false; |
| 254 | } |
| 255 | /*}}}*/ |