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 /* libstdc++-v3 _really_ dislikes min & max defined as macros. */
  33 /* As of gcc 3.3.1, it defines NOMINMAX itself, so test first,
  34  * to avoid a redefinition error */
  35 #ifndef NOMINMAX
  36 #define NOMINMAX
  37 #endif
  38
  39 /* 100ns difference between Windows and UNIX timebase. */
  40 #define FACTOR (0x19db1ded53e8000LL)
  41 /* # of 100ns intervals per second. */
  42 #define NSPERSEC 10000000LL
  43
  44 /* In w32api 3.1, __declspec(dllimport) decoration is added to
  45  * certain symbols. This breaks our autoload mechanism - the symptom is
  46  * multiple declaration errors at link time. This define turns that off again.
  47  * It will default to off again in later w32api versions, but we need to work
  48  * with 3.1 for now. */
  49 #define DECLSPEC_IMPORT
  50 #define WINBASEAPI
  51
  52 #include <windows.h>
  53
  54 /* FIXME: The use of _access(fname, 0) as an existence check should be
  55  * replaced with a more readable idiom, and this fragment removed. */
  56 #ifndef _access
  57 #define _access access
  58 #endif
  59
  60 /* When we have to check for a path delimiter, check for both, slash and
  61    backslash. */
  62 #define isdirsep(ch) \
  63     ({ \
  64         char __c = (ch); \
  65         ((__c) == '/' || (__c) == '\\'); \
  66     })
  67
  68 /* Maximum size of a SID. */
  69 #define MAX_SID_LEN     40
  70
  71 /* Computes the size of an ACL in relation to the number of ACEs it
  72    should contain. */
  73 #define TOKEN_ACL_SIZE(cnt) (sizeof (ACL) + \
  74                              (cnt) * (sizeof (ACCESS_ALLOWED_ACE) + MAX_SID_LEN))
  75
  76 struct acl_t {
  77   /* Make sure &acl is 4-byte aligned. */
  78   ACL acl __attribute__ ((aligned (4)));
  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 initialiseWellKnownSIDs ();
 134   void setDefaultSecurity();
 135   bool isRunAsAdmin ();
 136 private:
 137   void NoteFailedAPI (const std::string &);
 138   bool wellKnownSIDsinitialized () const { return _wellKnownSIDsinitialized; }
 139   void wellKnownSIDsinitialized (bool b) { _wellKnownSIDsinitialized = b; }
 140   void setDefaultDACL ();
 141   void setBackupPrivileges ();
 142
 143   SIDWrapper nullSID, everyOneSID, administratorsSID, usersSID,
 144              cr_ownerSID, cr_groupSID;
 145   struct {
 146     TOKEN_USER user;
 147     char buf[MAX_SID_LEN];
 148   } ownerSID;
 149   PSID groupSID;
 150   struct {
 151     TOKEN_PRIMARY_GROUP pgrp;
 152     char buf[MAX_SID_LEN];
 153   } primaryGroupSID;
 154
 155   bool _wellKnownSIDsinitialized;
 156   HANDLEWrapper token;
 157   DWORD size;
 158 };
 159
 160 extern NTSecurity nt_sec;
 161
 162 #undef major
 163 #undef minor
 164 class VersionInfo
 165 {
 166   public:
 167      VersionInfo ();
 168      DWORD major () const { return v.dwMajorVersion; }
 169      DWORD minor () const { return v.dwMinorVersion; }
 170   private:
 171      OSVERSIONINFO v;
 172 };
 173
 174 VersionInfo& GetVer ();
 175
 176 #define OSMajorVersion() (GetVer ().major ())
 177 #define OSMinorVersion() (GetVer ().minor ())
 178
 179 static inline void
 180 GetDlgItemRect (HWND h, int item, LPRECT r)
 181 {
 182   GetWindowRect (GetDlgItem (h, item), r);
 183   MapWindowPoints (HWND_DESKTOP, h, (LPPOINT) r, 2);
 184 }
 185
 186 static inline void
 187 SetDlgItemRect (HWND h, int item, LPRECT r)
 188 {
 189   MoveWindow (GetDlgItem (h, item), r->left, r->top,
 190               r->right - r->left, r->bottom - r->top, TRUE);
 191 }
 192
 193 #endif /* SETUP_WIN32_H */