| 1 | // -*- mode: cpp; mode: fold -*- |
| 2 | // Description /*{{{*/ |
| 3 | // $Id: dirstream.cc,v 1.3.2.1 2004/01/16 18:58:50 mdz Exp $ |
| 4 | /* ###################################################################### |
| 5 | |
| 6 | Directory Stream |
| 7 | |
| 8 | This class provides a simple basic extractor that can be used for |
| 9 | a number of purposes. |
| 10 | |
| 11 | ##################################################################### */ |
| 12 | /*}}}*/ |
| 13 | // Include Files /*{{{*/ |
| 14 | #include<config.h> |
| 15 | |
| 16 | #include <apt-pkg/dirstream.h> |
| 17 | #include <apt-pkg/error.h> |
| 18 | |
| 19 | #include <fcntl.h> |
| 20 | #include <sys/stat.h> |
| 21 | #include <sys/time.h> |
| 22 | #include <errno.h> |
| 23 | #include <unistd.h> |
| 24 | #include <apti18n.h> |
| 25 | /*}}}*/ |
| 26 | |
| 27 | // DirStream::DoItem - Process an item /*{{{*/ |
| 28 | // --------------------------------------------------------------------- |
| 29 | /* This is a very simple extractor, it does not deal with things like |
| 30 | overwriting directories with files and so on. */ |
| 31 | bool pkgDirStream::DoItem(Item &Itm,int &Fd) |
| 32 | { |
| 33 | switch (Itm.Type) |
| 34 | { |
| 35 | case Item::File: |
| 36 | { |
| 37 | /* Open the output file, NDELAY is used to prevent this from |
| 38 | blowing up on device special files.. */ |
| 39 | int iFd = open(Itm.Name,O_NDELAY|O_WRONLY|O_CREAT|O_TRUNC|O_APPEND, |
| 40 | Itm.Mode); |
| 41 | if (iFd < 0) |
| 42 | return _error->Errno("open",_("Failed to write file %s"), |
| 43 | Itm.Name); |
| 44 | |
| 45 | // fchmod deals with umask and fchown sets the ownership |
| 46 | if (fchmod(iFd,Itm.Mode) != 0) |
| 47 | { |
| 48 | close(iFd); |
| 49 | return _error->Errno("fchmod",_("Failed to write file %s"), Itm.Name); |
| 50 | } |
| 51 | if (fchown(iFd,Itm.UID,Itm.GID) != 0 && errno != EPERM) |
| 52 | { |
| 53 | close(iFd); |
| 54 | return _error->Errno("fchown",_("Failed to write file %s"), Itm.Name); |
| 55 | } |
| 56 | Fd = iFd; |
| 57 | return true; |
| 58 | } |
| 59 | |
| 60 | case Item::HardLink: |
| 61 | case Item::SymbolicLink: |
| 62 | case Item::CharDevice: |
| 63 | case Item::BlockDevice: |
| 64 | case Item::Directory: |
| 65 | { |
| 66 | struct stat Buf; |
| 67 | // check if the dir is already there, if so return true |
| 68 | if (stat(Itm.Name,&Buf) == 0) |
| 69 | { |
| 70 | if(S_ISDIR(Buf.st_mode)) |
| 71 | return true; |
| 72 | // something else is there already, return false |
| 73 | return false; |
| 74 | } |
| 75 | // nothing here, create the dir |
| 76 | if(mkdir(Itm.Name,Itm.Mode) < 0) |
| 77 | return false; |
| 78 | return true; |
| 79 | break; |
| 80 | } |
| 81 | case Item::FIFO: |
| 82 | break; |
| 83 | } |
| 84 | |
| 85 | return true; |
| 86 | } |
| 87 | /*}}}*/ |
| 88 | // DirStream::FinishedFile - Finished processing a file /*{{{*/ |
| 89 | // --------------------------------------------------------------------- |
| 90 | /* */ |
| 91 | bool pkgDirStream::FinishedFile(Item &Itm,int Fd) |
| 92 | { |
| 93 | if (Fd < 0) |
| 94 | return true; |
| 95 | |
| 96 | /* Set the modification times. The only way it can fail is if someone |
| 97 | has futzed with our file, which is intolerable :> */ |
| 98 | struct timeval times[2]; |
| 99 | times[0].tv_sec = times[1].tv_sec = Itm.MTime; |
| 100 | times[0].tv_usec = times[1].tv_usec = 0; |
| 101 | if (utimes(Itm.Name, times) != 0) |
| 102 | _error->Errno("utimes", "Failed to set modification time for %s",Itm.Name); |
| 103 | |
| 104 | if (close(Fd) != 0) |
| 105 | return _error->Errno("close",_("Failed to close file %s"),Itm.Name); |
| 106 | return true; |
| 107 | } |
| 108 | /*}}}*/ |
| 109 | // DirStream::Fail - Failed processing a file /*{{{*/ |
| 110 | // --------------------------------------------------------------------- |
| 111 | /* */ |
| 112 | bool pkgDirStream::Fail(Item &/*Itm*/, int Fd) |
| 113 | { |
| 114 | if (Fd < 0) |
| 115 | return true; |
| 116 | |
| 117 | close(Fd); |
| 118 | return false; |
| 119 | } |
| 120 | /*}}}*/ |