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 /* Needed for some buffers etc., to have a useful replacement for MAX_PATH. */
  24 #define CYG_PATH_MAX    4096
  25
  26 /* Any include of <windows.h> should be through this file, which wraps it in
  27  * various other handling. */
  28
  29 /* Basic Windows features only. */
  30 #define WIN32_LEAN_AND_MEAN
  31
  32 #undef _WIN32_WINNT
  33 #define _WIN32_WINNT 0x0a00
  34
  35 /* libstdc++-v3 _really_ dislikes min & max defined as macros. */
  36 /* As of gcc 3.3.1, it defines NOMINMAX itself, so test first,
  37  * to avoid a redefinition error */
  38 #ifndef NOMINMAX
  39 #define NOMINMAX
  40 #endif
  41
  42 /* 100ns difference between Windows and UNIX timebase. */
  43 #define FACTOR (0x19db1ded53e8000LL)
  44 /* # of 100ns intervals per second. */
  45 #define NSPERSEC 10000000LL
  46
  47 /* Defining WINBASEAPI is required due the overloading definitions of some
  48    kernel32 functions in filemanip.cc. */
  49 #define WINBASEAPI
  50
  51 #include <windows.h>
  52
  53 /* FIXME: The use of _access(fname, 0) as an existence check should be
  54  * replaced with a more readable idiom, and this fragment removed. */
  55 #ifndef _access
  56 #define _access access
  57 #endif
  58
  59 /* When we have to check for a path delimiter, check for both, slash and
  60    backslash. */
  61 #define isdirsep(ch) \
  62     ({ \
  63         char __c = (ch); \
  64         ((__c) == '/' || (__c) == '\\'); \
  65     })
  66
  67 /* Maximum size of a SID. */
  68 #define MAX_SID_LEN     40
  69
  70 /* Computes the size of an ACL in relation to the number of ACEs it
  71    should contain. */
  72 #define TOKEN_ACL_SIZE(cnt) (sizeof (ACL) + \
  73                              (cnt) * (sizeof (ACCESS_ALLOWED_ACE) + MAX_SID_LEN))
  74
  75 struct acl_t {
  76   /* Make sure &acl is 4-byte aligned. */
  77   ACL acl __attribute__ ((aligned (4)));
  78   char aclbuf[TOKEN_ACL_SIZE (7)];
  79 };
  80
  81 class SIDWrapper {
  82   public:
  83     SIDWrapper () : value (NULL) {}
  84     /* Prevent synthetics. If assignment is needed, this should be
  85        refcounting.  */
  86     SIDWrapper (SIDWrapper const &);
  87     SIDWrapper& operator= (SIDWrapper const &);
  88     ~SIDWrapper () { if (value) FreeSid (value); }
  89
  90     /* We could look at doing weird typcast overloads here,
  91        but manual access is easier for now.  */
  92     PSID &theSID () { return value; }
  93     PSID const &theSID () const { return value; }
  94   private:
  95     PSID value;
  96 };
  97
  98 class HANDLEWrapper {
  99   public:
 100     HANDLEWrapper () : value (NULL) {}
 101     /* Prevent synthetics. If assignment is needed, we should duphandles,
 102        or refcount.  */
 103     HANDLEWrapper (HANDLEWrapper const &);
 104     HANDLEWrapper& operator= (HANDLEWrapper const &);
 105     ~HANDLEWrapper () { if (value) CloseHandle (value); }
 106     HANDLE &theHANDLE () { return value; }
 107     HANDLE const &theHANDLE () const { return value; }
 108   private:
 109     HANDLE value;
 110 };
 111
 112 class NTSecurity
 113 {
 114 public:
 115   NTSecurity () : nullSID (), everyOneSID (), administratorsSID (), usersSID (),
 116                   cr_ownerSID (), cr_groupSID (), groupSID (NULL),
 117                   _wellKnownSIDsinitialized (false), token () {}
 118   ~NTSecurity() {}
 119
 120   /* prevent synthetics */
 121   NTSecurity& operator= (NTSecurity const &);
 122   NTSecurity (NTSecurity const &);
 123
 124   /* Set POSIX-like permissions on files.  The fname is only used for printing
 125      log output.  The function requires an open HANDLE with sufficient
 126      permissions (READ_DAC | WRITE_DAC). */
 127   PSECURITY_DESCRIPTOR GetPosixPerms (const char *fname, PSID owner_sid,
 128                                       PSID group_sid, mode_t mode,
 129                                       SECURITY_DESCRIPTOR &out_sd, acl_t &acl);
 130   void resetPrimaryGroup();
 131   void setAdminGroup ();
 132   void initialiseWellKnownSIDs ();
 133   void setDefaultSecurity();
 134   bool isRunAsAdmin ();
 135 private:
 136   void NoteFailedAPI (const std::string &);
 137   bool wellKnownSIDsinitialized () const { return _wellKnownSIDsinitialized; }
 138   void wellKnownSIDsinitialized (bool b) { _wellKnownSIDsinitialized = b; }
 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      DWORD buildNumber () const { return v.dwBuildNumber; }
 170   private:
 171      OSVERSIONINFO v;
 172 };
 173
 174 VersionInfo& GetVer ();
 175
 176 #define OSMajorVersion() (GetVer ().major ())
 177 #define OSMinorVersion() (GetVer ().minor ())
 178 #define OSBuildNumber() (GetVer ().buildNumber ())
 179
 180 static inline void
 181 GetDlgItemRect (HWND h, int item, LPRECT r)
 182 {
 183   GetWindowRect (GetDlgItem (h, item), r);
 184   MapWindowPoints (HWND_DESKTOP, h, (LPPOINT) r, 2);
 185 }
 186
 187 static inline void
 188 SetDlgItemRect (HWND h, int item, LPRECT r)
 189 {
 190   MoveWindow (GetDlgItem (h, item), r->left, r->top,
 191               r->right - r->left, r->bottom - r->top, TRUE);
 192 }
 193
 194 #endif /* SETUP_WIN32_H */