loader/selector.c

   1 /*
   2  * Selector manipulation functions
   3  *
   4  * Copyright 1993 Robert J. Amstadt
   5  * Copyright 1995 Alexandre Julliard
   6  */
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <unistd.h>
  12
  13 #ifndef WINELIB
  14
  15 #include "windows.h"
  16 #include "global.h"
  17 #include "module.h"
  18 #include "stddebug.h"
  19 /* #define DEBUG_SELECTORS */
  20 #include "debug.h"
  21
  22
  23 #define MAX_ENV_SIZE 16384  /* Max. environment size (ought to be dynamic) */
  24
  25 static HANDLE EnvironmentHandle = 0;
  26
  27
  28 extern char WindowsPath[256];
  29
  30 extern char **environ;
  31
  32
  33
  34 WNDPROC GetWndProcEntry16( char *name )
  35 {
  36     WORD ordinal;
  37     static HMODULE hModule = 0;
  38
  39     if (!hModule) hModule = GetModuleHandle( "WINPROCS" );
  40     ordinal = MODULE_GetOrdinal( hModule, name );
  41     return MODULE_GetEntryPoint( hModule, ordinal );
  42 }
  43
  44
  45 /***********************************************************************
  46  *           GetDOSEnvironment   (KERNEL.131)
  47  */
  48 SEGPTR GetDOSEnvironment(void)
  49 {
  50     return WIN16_GlobalLock( EnvironmentHandle );
  51 }
  52
  53
  54 /**********************************************************************
  55  *           CreateEnvironment
  56  */
  57 static HANDLE CreateEnvironment(void)
  58 {
  59     HANDLE handle;
  60     char **e;
  61     char *p;
  62
  63     handle = GlobalAlloc( GMEM_MOVEABLE, MAX_ENV_SIZE );
  64     if (!handle) return 0;
  65     p = (char *) GlobalLock( handle );
  66
  67     /*
  68      * Fill environment with Windows path, the Unix environment,
  69      * and program name.
  70      */
  71     strcpy(p, "PATH=");
  72     strcat(p, WindowsPath);
  73     p += strlen(p) + 1;
  74
  75     for (e = environ; *e; e++)
  76     {
  77         if (strncasecmp(*e, "path", 4))
  78         {
  79             strcpy(p, *e);
  80             p += strlen(p) + 1;
  81         }
  82     }
  83
  84     *p++ = '\0';
  85
  86     /*
  87      * Display environment
  88      */
  89     p = (char *) GlobalLock( handle );
  90     dprintf_selectors(stddeb, "Environment at %p\n", p);
  91     for (; *p; p += strlen(p) + 1) dprintf_selectors(stddeb, "    %s\n", p);
  92
  93     return handle;
  94 }
  95
  96
  97
  98 /**********************************************************************
  99  *                                      CreateSelectors
 100  */
 101 void CreateSelectors(void)
 102 {
 103     if(!EnvironmentHandle) EnvironmentHandle = CreateEnvironment();
 104 }
 105
 106
 107 #endif /* ifndef WINELIB */