win32.h

   1 /*
   2  * Copyright (c) 2000, Red Hat, Inc.
   3  *
   4  *     This program is free software; you can redistribute it and/or modify
   5  *     it under the terms of the GNU General Public License as published by
   6  *     the Free Software Foundation; either version 2 of the License, or
   7  *     (at your option) any later version.
   8  *
   9  *     A copy of the GNU General Public License can be found at
  10  *     http://www.gnu.org/
  11  *
  12  * Written by DJ Delorie <dj@cygnus.com>
  13  * and Robert Collins <rbtcollins@hotmail.com>
  14  *
  15  */
  16
  17 #ifndef SETUP_WIN32_H
  18 #define SETUP_WIN32_H
  19
  20 #include <string>
  21
  22 /* Any include of <windows.h> should be through this file, which wraps it in
  23  * various other handling. */
  24
  25 /* Basic Windows features only. */
  26 #define WIN32_LEAN_AND_MEAN
  27
  28 /* libstdc++-v3 _really_ dislikes min & max defined as macros. */
  29 /* As of gcc 3.3.1, it defines NOMINMAX itself, so test first,
  30  * to avoid a redefinition error */
  31 #ifndef NOMINMAX
  32 #define NOMINMAX
  33 #endif
  34
  35 /* In w32api 3.1, __declspec(dllimport) decoration is added to
  36  * certain symbols. This breaks our autoload mechanism - the symptom is
  37  * multiple declaration errors at link time. This define turns that off again.
  38  * It will default to off again in later w32api versions, but we need to work
  39  * with 3.1 for now. */
  40 #define WINBASEAPI
  41
  42 /* Require at least Internet Explorer 3, in order to have access to
  43  * sufficient Windows Common Controls features from <commctrl.h> . */
  44 #define _WIN32_IE 0x0300
  45
  46 #include <windows.h>
  47
  48 /* FIXME: The use of _access(fname, 0) as an existence check should be
  49  * replaced with a more readable idiom, and this fragment removed. */
  50 #ifndef _access
  51 #define _access access
  52 #endif
  53
  54 /* Maximum size of a SID on NT/W2K. */
  55 #define MAX_SID_LEN     40
  56
  57 /* Computes the size of an ACL in relation to the number of ACEs it
  58    should contain. */
  59 #define TOKEN_ACL_SIZE(cnt) (sizeof (ACL) + \
  60                              (cnt) * (sizeof (ACCESS_ALLOWED_ACE) + MAX_SID_LEN))
  61
  62 struct acl_t {
  63  ACL acl;
  64  char aclbuf[TOKEN_ACL_SIZE (7)];
  65 };
  66
  67 class SIDWrapper {
  68   public:
  69     SIDWrapper () : value (NULL) {}
  70     /* Prevent synthetics. If assignment is needed, this should be
  71        refcounting.  */
  72     SIDWrapper (SIDWrapper const &);
  73     SIDWrapper& operator= (SIDWrapper const &);
  74     ~SIDWrapper () { if (value) FreeSid (value); }
  75
  76     /* We could look at doing weird typcast overloads here,
  77        but manual access is easier for now.  */
  78     PSID &theSID () { return value; }
  79     PSID const &theSID () const { return value; }
  80   private:
  81     PSID value;
  82 };
  83
  84 class HANDLEWrapper {
  85   public:
  86     HANDLEWrapper () : value (NULL) {}
  87     /* Prevent synthetics. If assignment is needed, we should duphandles,
  88        or refcount.  */
  89     HANDLEWrapper (HANDLEWrapper const &);
  90     HANDLEWrapper& operator= (HANDLEWrapper const &);
  91     ~HANDLEWrapper () { if (value) CloseHandle (value); }
  92     HANDLE &theHANDLE () { return value; }
  93     HANDLE const &theHANDLE () const { return value; }
  94   private:
  95     HANDLE value;
  96 };
  97
  98 class NTSecurity
  99 {
 100 public:
 101   NTSecurity () : nullSID (), everyOneSID (), administratorsSID (), usersSID (),
 102                   cr_ownerSID (), cr_groupSID (), groupSID (NULL),
 103                   _wellKnownSIDsinitialized (false), token () {}
 104   ~NTSecurity() {}
 105
 106   /* prevent synthetics */
 107   NTSecurity& operator= (NTSecurity const &);
 108   NTSecurity (NTSecurity const &);
 109
 110   /* Set POSIX-like permissions on files.  The fname is only used for printing
 111      log output.  The function requires an open HANDLE with sufficient
 112      permissions (READ_DAC | WRITE_DAC). */
 113   PSECURITY_DESCRIPTOR GetPosixPerms (const char *fname, PSID owner_sid,
 114                                       PSID group_sid, mode_t mode,
 115                                       SECURITY_DESCRIPTOR &out_sd, acl_t &acl);
 116   void SetPosixPerms (const char *fname, HANDLE fh, mode_t mode);
 117   void resetPrimaryGroup();
 118   void setAdminGroup ();
 119   void setDefaultSecurity();
 120 private:
 121   void NoteFailedAPI (const std::string &);
 122   bool wellKnownSIDsinitialized () const { return _wellKnownSIDsinitialized; }
 123   void wellKnownSIDsinitialized (bool b) { _wellKnownSIDsinitialized = b; }
 124   void initialiseWellKnownSIDs ();
 125   void setDefaultDACL ();
 126   void setBackupPrivileges ();
 127
 128   SIDWrapper nullSID, everyOneSID, administratorsSID, usersSID,
 129              cr_ownerSID, cr_groupSID;
 130   struct {
 131     TOKEN_USER user;
 132     char buf[MAX_SID_LEN];
 133   } ownerSID;
 134   PSID groupSID;
 135   struct {
 136     TOKEN_PRIMARY_GROUP pgrp;
 137     char buf[MAX_SID_LEN];
 138   } primaryGroupSID;
 139
 140   bool _wellKnownSIDsinitialized;
 141   HANDLEWrapper token;
 142   DWORD size;
 143 };
 144
 145 extern NTSecurity nt_sec;
 146
 147 #undef major
 148 #undef minor
 149 class VersionInfo
 150 {
 151   public:
 152      VersionInfo ();
 153      bool isNT () { return (v.dwPlatformId == VER_PLATFORM_WIN32_NT); }
 154      DWORD major () const { return v.dwMajorVersion; }
 155      DWORD minor () const { return v.dwMinorVersion; }
 156   private:
 157      OSVERSIONINFO v;
 158 };
 159
 160 VersionInfo& GetVer ();
 161
 162 #define IsWindowsNT() (GetVer ().isNT ())
 163 #define OSMajorVersion() (GetVer ().major ())
 164 #define OSMinorVersion() (GetVer ().minor ())
 165
 166 #endif /* SETUP_WIN32_H */