| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: cdrom.cc,v 1.20.2.1 2004/01/16 18:58:50 mdz Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | CDROM URI method for APT |
| 7 | |
| 8 | ##################################################################### */ |
| 9 | /*}}}*/ |
| 10 | // Include Files /*{{{*/ |
| 11 | #include <config.h> |
| 12 | |
| 13 | #include <apt-pkg/cdrom.h> |
| 14 | #include <apt-pkg/cdromutl.h> |
| 15 | #include <apt-pkg/error.h> |
| 16 | #include <apt-pkg/configuration.h> |
| 17 | #include <apt-pkg/fileutl.h> |
| 18 | #include <apt-pkg/strutl.h> |
| 19 | #include <apt-pkg/hashes.h> |
| 20 | |
| 21 | #include "aptmethod.h" |
| 22 | |
| 23 | #include <string> |
| 24 | #include <vector> |
| 25 | #include <sys/stat.h> |
| 26 | |
| 27 | #include <iostream> |
| 28 | #include <apti18n.h> |
| 29 | /*}}}*/ |
| 30 | |
| 31 | using namespace std; |
| 32 | |
| 33 | class CDROMMethod : public aptMethod |
| 34 | { |
| 35 | bool DatabaseLoaded; |
| 36 | bool Debug; |
| 37 | |
| 38 | ::Configuration Database; |
| 39 | string CurrentID; |
| 40 | string CDROM; |
| 41 | bool MountedByApt; |
| 42 | pkgUdevCdromDevices UdevCdroms; |
| 43 | |
| 44 | bool IsCorrectCD(URI want, string MountPath, string& NewID); |
| 45 | bool AutoDetectAndMount(const URI, string &NewID); |
| 46 | virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE; |
| 47 | string GetID(string Name); |
| 48 | virtual void Exit() APT_OVERRIDE; |
| 49 | |
| 50 | public: |
| 51 | |
| 52 | CDROMMethod(); |
| 53 | }; |
| 54 | |
| 55 | // CDROMMethod::CDROMethod - Constructor /*{{{*/ |
| 56 | // --------------------------------------------------------------------- |
| 57 | /* */ |
| 58 | CDROMMethod::CDROMMethod() : aptMethod("cdrom", "1.0",SingleInstance | LocalOnly | |
| 59 | SendConfig | NeedsCleanup | |
| 60 | Removable), |
| 61 | DatabaseLoaded(false), |
| 62 | Debug(false), |
| 63 | MountedByApt(false) |
| 64 | { |
| 65 | UdevCdroms.Dlopen(); |
| 66 | } |
| 67 | /*}}}*/ |
| 68 | // CDROMMethod::Exit - Unmount the disc if necessary /*{{{*/ |
| 69 | // --------------------------------------------------------------------- |
| 70 | /* */ |
| 71 | void CDROMMethod::Exit() |
| 72 | { |
| 73 | if (MountedByApt == true) |
| 74 | UnmountCdrom(CDROM); |
| 75 | } |
| 76 | /*}}}*/ |
| 77 | // CDROMMethod::GetID - Search the database for a matching string /*{{{*/ |
| 78 | // --------------------------------------------------------------------- |
| 79 | /* */ |
| 80 | string CDROMMethod::GetID(string Name) |
| 81 | { |
| 82 | // Search for an ID |
| 83 | const Configuration::Item *Top = Database.Tree("CD"); |
| 84 | if (Top != 0) |
| 85 | Top = Top->Child; |
| 86 | |
| 87 | for (; Top != 0;) |
| 88 | { |
| 89 | if (Top->Value == Name) |
| 90 | return Top->Tag; |
| 91 | |
| 92 | Top = Top->Next; |
| 93 | } |
| 94 | return string(); |
| 95 | } |
| 96 | /*}}}*/ |
| 97 | // CDROMMethod::AutoDetectAndMount /*{{{*/ |
| 98 | // --------------------------------------------------------------------- |
| 99 | /* Modifies class varaiable CDROM to the mountpoint */ |
| 100 | bool CDROMMethod::AutoDetectAndMount(const URI Get, string &NewID) |
| 101 | { |
| 102 | vector<struct CdromDevice> v = UdevCdroms.Scan(); |
| 103 | |
| 104 | // first check if its mounted somewhere already |
| 105 | for (unsigned int i=0; i < v.size(); i++) |
| 106 | { |
| 107 | if (v[i].Mounted) |
| 108 | { |
| 109 | if (Debug) |
| 110 | clog << "Checking mounted cdrom device " << v[i].DeviceName << endl; |
| 111 | if (IsCorrectCD(Get, v[i].MountPath, NewID)) |
| 112 | { |
| 113 | CDROM = v[i].MountPath; |
| 114 | return true; |
| 115 | } |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | // we are not supposed to mount, exit |
| 120 | if (_config->FindB("APT::CDROM::NoMount",false) == true) |
| 121 | return false; |
| 122 | |
| 123 | // check if we have the mount point |
| 124 | string AptMountPoint = _config->FindDir("Dir::Media::MountPath"); |
| 125 | if (!FileExists(AptMountPoint)) |
| 126 | mkdir(AptMountPoint.c_str(), 0750); |
| 127 | |
| 128 | // now try mounting |
| 129 | for (unsigned int i=0; i < v.size(); i++) |
| 130 | { |
| 131 | if (!v[i].Mounted) |
| 132 | { |
| 133 | if(MountCdrom(AptMountPoint, v[i].DeviceName)) |
| 134 | { |
| 135 | if (IsCorrectCD(Get, AptMountPoint, NewID)) |
| 136 | { |
| 137 | MountedByApt = true; |
| 138 | CDROM = AptMountPoint; |
| 139 | return true; |
| 140 | } else { |
| 141 | UnmountCdrom(AptMountPoint); |
| 142 | } |
| 143 | } |
| 144 | } |
| 145 | } |
| 146 | |
| 147 | return false; |
| 148 | } |
| 149 | /*}}}*/ |
| 150 | // CDROMMethod::IsCorrectCD /*{{{*/ |
| 151 | // --------------------------------------------------------------------- |
| 152 | /* */ |
| 153 | bool CDROMMethod::IsCorrectCD(URI want, string MountPath, string& NewID) |
| 154 | { |
| 155 | for (unsigned int Version = 2; Version != 0; Version--) |
| 156 | { |
| 157 | if (IdentCdrom(MountPath,NewID,Version) == false) |
| 158 | return false; |
| 159 | |
| 160 | if (Debug) |
| 161 | clog << "ID " << Version << " " << NewID << endl; |
| 162 | |
| 163 | // A hit |
| 164 | if (Database.Find("CD::" + NewID) == want.Host) |
| 165 | return true; |
| 166 | } |
| 167 | |
| 168 | return false; |
| 169 | } |
| 170 | /*}}}*/ |
| 171 | // CDROMMethod::Fetch - Fetch a file /*{{{*/ |
| 172 | // --------------------------------------------------------------------- |
| 173 | /* */ |
| 174 | bool CDROMMethod::Fetch(FetchItem *Itm) |
| 175 | { |
| 176 | FetchResult Res; |
| 177 | |
| 178 | URI Get = Itm->Uri; |
| 179 | string File = Get.Path; |
| 180 | Debug = _config->FindB("Debug::Acquire::cdrom", false); |
| 181 | |
| 182 | if (Debug) |
| 183 | clog << "CDROMMethod::Fetch " << Itm->Uri << endl; |
| 184 | |
| 185 | /* All IMS queries are returned as a hit, CDROMs are readonly so |
| 186 | time stamps never change */ |
| 187 | if (Itm->LastModified != 0) |
| 188 | { |
| 189 | Res.LastModified = Itm->LastModified; |
| 190 | Res.IMSHit = true; |
| 191 | Res.Filename = Itm->DestFile; |
| 192 | URIDone(Res); |
| 193 | return true; |
| 194 | } |
| 195 | |
| 196 | // Load the database |
| 197 | if (DatabaseLoaded == false) |
| 198 | { |
| 199 | // Read the database |
| 200 | string DFile = _config->FindFile("Dir::State::cdroms"); |
| 201 | if (FileExists(DFile) == true) |
| 202 | { |
| 203 | if (ReadConfigFile(Database,DFile) == false) |
| 204 | return _error->Error(_("Unable to read the cdrom database %s"), |
| 205 | DFile.c_str()); |
| 206 | } |
| 207 | DatabaseLoaded = true; |
| 208 | } |
| 209 | |
| 210 | // All non IMS queries for package files fail. |
| 211 | if (Itm->IndexFile == true || GetID(Get.Host).empty() == true) |
| 212 | { |
| 213 | Fail(_("Please use apt-cdrom to make this CD-ROM recognized by APT." |
| 214 | " apt-get update cannot be used to add new CD-ROMs")); |
| 215 | return true; |
| 216 | } |
| 217 | |
| 218 | // We already have a CD inserted, but it is the wrong one |
| 219 | if (CurrentID.empty() == false && |
| 220 | CurrentID != "FAIL" && |
| 221 | Database.Find("CD::" + CurrentID) != Get.Host) |
| 222 | { |
| 223 | Fail(_("Wrong CD-ROM"),true); |
| 224 | return true; |
| 225 | } |
| 226 | |
| 227 | bool AutoDetect = _config->FindB("Acquire::cdrom::AutoDetect", true); |
| 228 | CDROM = _config->FindDir("Acquire::cdrom::mount"); |
| 229 | if (Debug) |
| 230 | clog << "Looking for CDROM at " << CDROM << endl; |
| 231 | |
| 232 | if (CDROM[0] == '.') |
| 233 | CDROM= SafeGetCWD() + '/' + CDROM; |
| 234 | |
| 235 | string NewID; |
| 236 | while (CurrentID.empty() == true) |
| 237 | { |
| 238 | if (AutoDetect) |
| 239 | AutoDetectAndMount(Get, NewID); |
| 240 | |
| 241 | if(!IsMounted(CDROM)) |
| 242 | MountedByApt = MountCdrom(CDROM); |
| 243 | |
| 244 | if (IsCorrectCD(Get, CDROM, NewID)) |
| 245 | break; |
| 246 | |
| 247 | // I suppose this should prompt somehow? |
| 248 | if (_config->FindB("APT::CDROM::NoMount",false) == false && |
| 249 | UnmountCdrom(CDROM) == false) |
| 250 | return _error->Error(_("Unable to unmount the CD-ROM in %s, it may still be in use."), |
| 251 | CDROM.c_str()); |
| 252 | if (MediaFail(Get.Host,CDROM) == false) |
| 253 | { |
| 254 | CurrentID = "FAIL"; |
| 255 | return _error->Error(_("Disk not found.")); |
| 256 | } |
| 257 | } |
| 258 | |
| 259 | // Found a CD |
| 260 | Res.Filename = CDROM + File; |
| 261 | struct stat Buf; |
| 262 | if (stat(Res.Filename.c_str(),&Buf) != 0) |
| 263 | return _error->Error(_("File not found")); |
| 264 | |
| 265 | URIStart(Res); |
| 266 | if (NewID.empty() == false) |
| 267 | CurrentID = NewID; |
| 268 | Res.LastModified = Buf.st_mtime; |
| 269 | Res.Size = Buf.st_size; |
| 270 | |
| 271 | Hashes Hash(Itm->ExpectedHashes); |
| 272 | FileFd Fd(Res.Filename, FileFd::ReadOnly); |
| 273 | Hash.AddFD(Fd); |
| 274 | Res.TakeHashes(Hash); |
| 275 | |
| 276 | URIDone(Res); |
| 277 | return true; |
| 278 | } |
| 279 | /*}}}*/ |
| 280 | |
| 281 | int main() |
| 282 | { |
| 283 | _config->CndSet("Binary::cdrom::Debug::NoDropPrivs", true); |
| 284 | return CDROMMethod().Run(); |
| 285 | } |