wvsync/wvsyncfile.h

   1 /*
   2  * Worldvisions Weaver Software:
   3  *   Copyright (C) 1997-2004 Net Integration Technologies, Inc.
   4  *
   5  * WvSyncFile provides the WvSyncObj implementation necessarily to
   6  * conduct librsync operations on a standard file.
   7  *
   8  * Note that I use the regular ::open() and ::read() calls, rather than
   9  * using WvFile, because I don't need or particularly want the buffer, and
  10  * I need to be able to lseek().
  11  */
  12
  13 #ifndef __WVSYNCFILE_H
  14 #define __WVSYNCFILE_H
  15
  16 #include "wvsyncobj.h"
  17
  18 class WvSyncFile : public WvSyncObj
  19 {
  20 public:
  21     WvSyncFile(WvStringParm _name, WvStringParm _rootdir);
  22
  23     virtual bool isok() const
  24         { return ok; }
  25
  26     virtual time_t findlastmodtime() const;
  27
  28     /** metadata for WvSyncFile looks like this:
  29      *      mode uidname uid gidname gid
  30      *  eg:
  31      *      49152:dcoombs:1000:weaver:4242
  32      */
  33     virtual WvString findmeta();
  34     virtual void applymeta(WvStringParm newmeta, time_t newmtime);
  35
  36     /** override isunchanged() to accommodate symlinks, where you can't
  37      * change the mtime.
  38      */
  39     virtual bool isunchanged(time_t sometime, WvStringParm somemeta) const;
  40
  41     /** issyncable() should return true for a regular file, a symlink, or a
  42      * directory, and false for everything else.  If the file doesn't
  43      * exist, we can still sync it down, so check for that too.
  44      */
  45     virtual bool issyncable() const
  46         { return S_ISREG(mode) || S_ISLNK(mode) || S_ISDIR(mode) || mode<0; }
  47
  48     virtual void makecopy(WvStringParm newname) const;
  49
  50     virtual bool isdir() const;
  51     virtual bool isdir(WvStringParm somemeta) const;
  52
  53     virtual bool installnew(WvStringParm fname, WvStringParm newmeta,
  54                             time_t newmtime);
  55
  56 private:
  57     WvString rootdir;
  58     int fd;
  59     off_t myofs;
  60     bool ok;
  61
  62     time_t mtime;
  63     mode_t mode;
  64     off_t  size;
  65     uid_t  uid;
  66     gid_t  gid;
  67
  68     virtual bool getdata(WvBuf &out, off_t ofs, size_t size);
  69
  70     virtual off_t approxsize() const;
  71
  72     WvString realname() const
  73         { return WvString("%s/%s", rootdir, name); }
  74 };
  75
  76 #endif // __WVSYNCFILE_H