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 <sys/types.h>
  21 #include <string>
  22
  23 /* Any include of <windows.h> should be through this file, which wraps it in
  24  * various other handling. */
  25
  26 /* Basic Windows features only. */
  27 #define WIN32_LEAN_AND_MEAN
  28
  29 /* libstdc++-v3 _really_ dislikes min & max defined as macros. */
  30 /* As of gcc 3.3.1, it defines NOMINMAX itself, so test first,
  31  * to avoid a redefinition error */
  32 #ifndef NOMINMAX
  33 #define NOMINMAX
  34 #endif
  35
  36 /* 100ns difference between Windows and UNIX timebase. */
  37 #define FACTOR (0x19db1ded53e8000LL)
  38 /* # of 100ns intervals per second. */
  39 #define NSPERSEC 10000000LL
  40
  41 /* In w32api 3.1, __declspec(dllimport) decoration is added to
  42  * certain symbols. This breaks our autoload mechanism - the symptom is
  43  * multiple declaration errors at link time. This define turns that off again.
  44  * It will default to off again in later w32api versions, but we need to work
  45  * with 3.1 for now. */
  46 #define DECLSPEC_IMPORT
  47 #define WINBASEAPI
  48
  49 /* Require at least Internet Explorer 3, in order to have access to
  50  * sufficient Windows Common Controls features from <commctrl.h> . */
  51 #define _WIN32_IE 0x0300
  52
  53 #include <windows.h>
  54
  55 /* FIXME: The use of _access(fname, 0) as an existence check should be
  56  * replaced with a more readable idiom, and this fragment removed. */
  57 #ifndef _access
  58 #define _access access
  59 #endif
  60
  61 /* When we have to check for a path delimiter, check for both, slash and
  62    backslash. */
  63 #define isdirsep(ch) \
  64     ({ \
  65         char __c = (ch); \
  66         ((__c) == '/' || (__c) == '\\'); \
  67     })
  68
  69 /* Maximum size of a SID on NT/W2K. */
  70 #define MAX_SID_LEN     40
  71
  72 /* Computes the size of an ACL in relation to the number of ACEs it
  73    should contain. */
  74 #define TOKEN_ACL_SIZE(cnt) (sizeof (ACL) + \
  75                              (cnt) * (sizeof (ACCESS_ALLOWED_ACE) + MAX_SID_LEN))
  76
  77 struct acl_t {
  78  ACL acl;
  79  char aclbuf[TOKEN_ACL_SIZE (7)];
  80 };
  81
  82 class SIDWrapper {
  83   public:
  84     SIDWrapper () : value (NULL) {}
  85     /* Prevent synthetics. If assignment is needed, this should be
  86        refcounting.  */
  87     SIDWrapper (SIDWrapper const &);
  88     SIDWrapper& operator= (SIDWrapper const &);
  89     ~SIDWrapper () { if (value) FreeSid (value); }
  90
  91     /* We could look at doing weird typcast overloads here,
  92        but manual access is easier for now.  */
  93     PSID &theSID () { return value; }
  94     PSID const &theSID () const { return value; }
  95   private:
  96     PSID value;
  97 };
  98
  99 class HANDLEWrapper {
 100   public:
 101     HANDLEWrapper () : value (NULL) {}
 102     /* Prevent synthetics. If assignment is needed, we should duphandles,
 103        or refcount.  */
 104     HANDLEWrapper (HANDLEWrapper const &);
 105     HANDLEWrapper& operator= (HANDLEWrapper const &);
 106     ~HANDLEWrapper () { if (value) CloseHandle (value); }
 107     HANDLE &theHANDLE () { return value; }
 108     HANDLE const &theHANDLE () const { return value; }
 109   private:
 110     HANDLE value;
 111 };
 112
 113 class NTSecurity
 114 {
 115 public:
 116   NTSecurity () : nullSID (), everyOneSID (), administratorsSID (), usersSID (),
 117                   cr_ownerSID (), cr_groupSID (), groupSID (NULL),
 118                   _wellKnownSIDsinitialized (false), token () {}
 119   ~NTSecurity() {}
 120
 121   /* prevent synthetics */
 122   NTSecurity& operator= (NTSecurity const &);
 123   NTSecurity (NTSecurity const &);
 124
 125   /* Set POSIX-like permissions on files.  The fname is only used for printing
 126      log output.  The function requires an open HANDLE with sufficient
 127      permissions (READ_DAC | WRITE_DAC). */
 128   PSECURITY_DESCRIPTOR GetPosixPerms (const char *fname, PSID owner_sid,
 129                                       PSID group_sid, mode_t mode,
 130                                       SECURITY_DESCRIPTOR &out_sd, acl_t &acl);
 131   void resetPrimaryGroup();
 132   void setAdminGroup ();
 133   void setDefaultSecurity();
 134 private:
 135   void NoteFailedAPI (const std::string &);
 136   bool wellKnownSIDsinitialized () const { return _wellKnownSIDsinitialized; }
 137   void wellKnownSIDsinitialized (bool b) { _wellKnownSIDsinitialized = b; }
 138   void initialiseWellKnownSIDs ();
 139   void setDefaultDACL ();
 140   void setBackupPrivileges ();
 141
 142   SIDWrapper nullSID, everyOneSID, administratorsSID, usersSID,
 143              cr_ownerSID, cr_groupSID;
 144   struct {
 145     TOKEN_USER user;
 146     char buf[MAX_SID_LEN];
 147   } ownerSID;
 148   PSID groupSID;
 149   struct {
 150     TOKEN_PRIMARY_GROUP pgrp;
 151     char buf[MAX_SID_LEN];
 152   } primaryGroupSID;
 153
 154   bool _wellKnownSIDsinitialized;
 155   HANDLEWrapper token;
 156   DWORD size;
 157 };
 158
 159 extern NTSecurity nt_sec;
 160
 161 #undef major
 162 #undef minor
 163 class VersionInfo
 164 {
 165   public:
 166      VersionInfo ();
 167      DWORD major () const { return v.dwMajorVersion; }
 168      DWORD minor () const { return v.dwMinorVersion; }
 169   private:
 170      OSVERSIONINFO v;
 171 };
 172
 173 VersionInfo& GetVer ();
 174
 175 #define OSMajorVersion() (GetVer ().major ())
 176 #define OSMinorVersion() (GetVer ().minor ())
 177
 178 #endif /* SETUP_WIN32_H */