| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: file.cc,v 1.9.2.1 2004/01/16 18:58:50 mdz Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | File URI method for APT |
| 7 | |
| 8 | This simply checks that the file specified exists, if so the relevant |
| 9 | information is returned. If a .gz filename is specified then the file |
| 10 | name with .gz removed will also be checked and information about it |
| 11 | will be returned in Alt-* |
| 12 | |
| 13 | ##################################################################### */ |
| 14 | /*}}}*/ |
| 15 | // Include Files /*{{{*/ |
| 16 | #include <config.h> |
| 17 | |
| 18 | #include <apt-pkg/acquire-method.h> |
| 19 | #include <apt-pkg/aptconfiguration.h> |
| 20 | #include <apt-pkg/error.h> |
| 21 | #include <apt-pkg/hashes.h> |
| 22 | #include <apt-pkg/fileutl.h> |
| 23 | #include <apt-pkg/strutl.h> |
| 24 | |
| 25 | #include <string> |
| 26 | #include <sys/stat.h> |
| 27 | |
| 28 | #include <apti18n.h> |
| 29 | /*}}}*/ |
| 30 | |
| 31 | class FileMethod : public pkgAcqMethod |
| 32 | { |
| 33 | virtual bool Fetch(FetchItem *Itm) APT_OVERRIDE; |
| 34 | virtual bool Configuration(std::string Message) APT_OVERRIDE; |
| 35 | |
| 36 | public: |
| 37 | |
| 38 | FileMethod() : pkgAcqMethod("1.0",SingleInstance | SendConfig | LocalOnly) {}; |
| 39 | }; |
| 40 | bool FileMethod::Configuration(std::string Message) |
| 41 | { |
| 42 | if (pkgAcqMethod::Configuration(Message) == false) |
| 43 | return false; |
| 44 | |
| 45 | DropPrivsOrDie(); |
| 46 | |
| 47 | return true; |
| 48 | } |
| 49 | |
| 50 | // FileMethod::Fetch - Fetch a file /*{{{*/ |
| 51 | // --------------------------------------------------------------------- |
| 52 | /* */ |
| 53 | bool FileMethod::Fetch(FetchItem *Itm) |
| 54 | { |
| 55 | URI Get = Itm->Uri; |
| 56 | std::string File = Get.Path; |
| 57 | FetchResult Res; |
| 58 | if (Get.Host.empty() == false) |
| 59 | return _error->Error(_("Invalid URI, local URIS must not start with //")); |
| 60 | |
| 61 | struct stat Buf; |
| 62 | // deal with destination files which might linger around |
| 63 | if (lstat(Itm->DestFile.c_str(), &Buf) == 0) |
| 64 | { |
| 65 | if ((Buf.st_mode & S_IFREG) != 0) |
| 66 | { |
| 67 | if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0) |
| 68 | { |
| 69 | HashStringList const hsl = Itm->ExpectedHashes; |
| 70 | if (Itm->ExpectedHashes.VerifyFile(File)) |
| 71 | { |
| 72 | Res.Filename = Itm->DestFile; |
| 73 | Res.IMSHit = true; |
| 74 | } |
| 75 | } |
| 76 | } |
| 77 | } |
| 78 | if (Res.IMSHit != true) |
| 79 | unlink(Itm->DestFile.c_str()); |
| 80 | |
| 81 | // See if the file exists |
| 82 | if (stat(File.c_str(),&Buf) == 0) |
| 83 | { |
| 84 | Res.Size = Buf.st_size; |
| 85 | Res.Filename = File; |
| 86 | Res.LastModified = Buf.st_mtime; |
| 87 | Res.IMSHit = false; |
| 88 | if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0) |
| 89 | { |
| 90 | unsigned long long const filesize = Itm->ExpectedHashes.FileSize(); |
| 91 | if (filesize != 0 && filesize == Res.Size) |
| 92 | Res.IMSHit = true; |
| 93 | } |
| 94 | |
| 95 | Hashes Hash(Itm->ExpectedHashes); |
| 96 | FileFd Fd(File, FileFd::ReadOnly); |
| 97 | Hash.AddFD(Fd); |
| 98 | Res.TakeHashes(Hash); |
| 99 | } |
| 100 | if (Res.IMSHit == false) |
| 101 | URIStart(Res); |
| 102 | |
| 103 | // See if the uncompressed file exists and reuse it |
| 104 | FetchResult AltRes; |
| 105 | AltRes.Filename.clear(); |
| 106 | std::vector<std::string> extensions = APT::Configuration::getCompressorExtensions(); |
| 107 | for (std::vector<std::string>::const_iterator ext = extensions.begin(); ext != extensions.end(); ++ext) |
| 108 | { |
| 109 | if (APT::String::Endswith(File, *ext) == true) |
| 110 | { |
| 111 | std::string const unfile = File.substr(0, File.length() - ext->length() - 1); |
| 112 | if (stat(unfile.c_str(),&Buf) == 0) |
| 113 | { |
| 114 | AltRes.Size = Buf.st_size; |
| 115 | AltRes.Filename = unfile; |
| 116 | AltRes.LastModified = Buf.st_mtime; |
| 117 | AltRes.IMSHit = false; |
| 118 | if (Itm->LastModified == Buf.st_mtime && Itm->LastModified != 0) |
| 119 | AltRes.IMSHit = true; |
| 120 | break; |
| 121 | } |
| 122 | // no break here as we could have situations similar to '.gz' vs '.tar.gz' here |
| 123 | } |
| 124 | } |
| 125 | |
| 126 | if (AltRes.Filename.empty() == false) |
| 127 | URIDone(Res,&AltRes); |
| 128 | else if (Res.Filename.empty() == false) |
| 129 | URIDone(Res); |
| 130 | else |
| 131 | return _error->Error(_("File not found")); |
| 132 | |
| 133 | return true; |
| 134 | } |
| 135 | /*}}}*/ |
| 136 | |
| 137 | int main() |
| 138 | { |
| 139 | setlocale(LC_ALL, ""); |
| 140 | |
| 141 | FileMethod Mth; |
| 142 | return Mth.Run(); |
| 143 | } |