2 * Process environment management
4 * Copyright 1996, 1998 Alexandre Julliard
10 #include "wine/winestring.h"
13 #include "selectors.h"
16 /* Format of an environment block:
17 * ASCIIZ string 1 (xx=yy format)
22 * ASCIIZ program name (e.g. C:\WINDOWS\SYSTEM\KRNL386.EXE)
25 * - contrary to Microsoft docs, the environment strings do not appear
26 * to be sorted on Win95 (although they are on NT); so we don't bother
27 * to sort them either.
30 static const char ENV_program_name
[] = "C:\\WINDOWS\\SYSTEM\\KRNL386.EXE";
32 /* Maximum length of a Win16 environment string (including NULL) */
33 #define MAX_WIN16_LEN 128
35 /* Extra bytes to reserve at the end of an environment */
36 #define EXTRA_ENV_SIZE (sizeof(BYTE) + sizeof(WORD) + sizeof(ENV_program_name))
38 /* Fill the extra bytes with the program name and stuff */
39 #define FILL_EXTRA_ENV(p) \
41 PUT_WORD( (p) + 1, 1 ); \
42 strcpy( (p) + 3, ENV_program_name );
44 STARTUPINFOA current_startupinfo
=
46 sizeof(STARTUPINFOA
), /* cb */
54 0, /* dwXCountChars */
55 0, /* dwYCountChars */
56 0, /* dwFillAttribute */
72 ¤t_startupinfo
, /* startup_info */
77 0, /* inherit_console */
82 0, /* break_handlers */
83 CRITICAL_SECTION_INIT
, /* section */
88 /***********************************************************************
91 * Find a variable in the environment and return a pointer to the value.
92 * Helper function for GetEnvironmentVariable and ExpandEnvironmentStrings.
94 static LPCSTR
ENV_FindVariable( LPCSTR env
, LPCSTR name
, INT len
)
98 if (!lstrncmpiA( name
, env
, len
) && (env
[len
] == '='))
100 env
+= strlen(env
) + 1;
106 /***********************************************************************
107 * ENV_BuildEnvironment
109 * Build the environment for the initial process
111 BOOL
ENV_BuildEnvironment(void)
113 extern char **environ
;
117 /* Compute the total size of the Unix environment */
119 size
= EXTRA_ENV_SIZE
;
120 for (e
= environ
; *e
; e
++) size
+= strlen(*e
) + 1;
122 /* Now allocate the environment */
124 if (!(p
= HeapAlloc( GetProcessHeap(), 0, size
))) return FALSE
;
125 current_envdb
.environ
= p
;
126 current_envdb
.env_sel
= SELECTOR_AllocBlock( p
, 0x10000, SEGMENT_DATA
, FALSE
, FALSE
);
128 /* And fill it with the Unix environment */
130 for (e
= environ
; *e
; e
++)
136 /* Now add the program name */
143 /***********************************************************************
144 * GetCommandLineA (KERNEL32.289)
146 LPSTR WINAPI
GetCommandLineA(void)
148 return current_envdb
.cmd_line
;
151 /***********************************************************************
152 * GetCommandLineW (KERNEL32.290)
154 LPWSTR WINAPI
GetCommandLineW(void)
156 EnterCriticalSection( ¤t_envdb
.section
);
157 if (!current_envdb
.cmd_lineW
)
158 current_envdb
.cmd_lineW
= HEAP_strdupAtoW( GetProcessHeap(), 0,
159 current_envdb
.cmd_line
);
160 LeaveCriticalSection( ¤t_envdb
.section
);
161 return current_envdb
.cmd_lineW
;
165 /***********************************************************************
166 * GetEnvironmentStringsA (KERNEL32.319) (KERNEL32.320)
168 LPSTR WINAPI
GetEnvironmentStringsA(void)
170 return current_envdb
.environ
;
174 /***********************************************************************
175 * GetEnvironmentStringsW (KERNEL32.321)
177 LPWSTR WINAPI
GetEnvironmentStringsW(void)
182 EnterCriticalSection( ¤t_envdb
.section
);
183 size
= HeapSize( GetProcessHeap(), 0, current_envdb
.environ
);
184 if ((ret
= HeapAlloc( GetProcessHeap(), 0, size
* sizeof(WCHAR
) )) != NULL
)
186 LPSTR pA
= current_envdb
.environ
;
188 while (size
--) *pW
++ = (WCHAR
)(BYTE
)*pA
++;
190 LeaveCriticalSection( ¤t_envdb
.section
);
195 /***********************************************************************
196 * FreeEnvironmentStringsA (KERNEL32.268)
198 BOOL WINAPI
FreeEnvironmentStringsA( LPSTR ptr
)
200 if (ptr
!= current_envdb
.environ
)
202 SetLastError( ERROR_INVALID_PARAMETER
);
209 /***********************************************************************
210 * FreeEnvironmentStringsW (KERNEL32.269)
212 BOOL WINAPI
FreeEnvironmentStringsW( LPWSTR ptr
)
214 return HeapFree( GetProcessHeap(), 0, ptr
);
218 /***********************************************************************
219 * GetEnvironmentVariableA (KERNEL32.322)
221 DWORD WINAPI
GetEnvironmentVariableA( LPCSTR name
, LPSTR value
, DWORD size
)
228 SetLastError( ERROR_INVALID_PARAMETER
);
231 EnterCriticalSection( ¤t_envdb
.section
);
232 if ((p
= ENV_FindVariable( current_envdb
.environ
, name
, strlen(name
) )))
237 /* If not enough room, include the terminating null
238 * in the returned size and return an empty string */
240 if (value
) *value
= '\0';
242 else if (value
) strcpy( value
, p
);
244 LeaveCriticalSection( ¤t_envdb
.section
);
245 return ret
; /* FIXME: SetLastError */
249 /***********************************************************************
250 * GetEnvironmentVariableW (KERNEL32.323)
252 DWORD WINAPI
GetEnvironmentVariableW( LPCWSTR nameW
, LPWSTR valW
, DWORD size
)
254 LPSTR name
= HEAP_strdupWtoA( GetProcessHeap(), 0, nameW
);
255 LPSTR val
= valW
? HeapAlloc( GetProcessHeap(), 0, size
) : NULL
;
256 DWORD res
= GetEnvironmentVariableA( name
, val
, size
);
257 HeapFree( GetProcessHeap(), 0, name
);
260 lstrcpynAtoW( valW
, val
, size
);
261 HeapFree( GetProcessHeap(), 0, val
);
267 /***********************************************************************
268 * SetEnvironmentVariableA (KERNEL32.641)
270 BOOL WINAPI
SetEnvironmentVariableA( LPCSTR name
, LPCSTR value
)
272 INT old_size
, len
, res
;
273 LPSTR p
, env
, new_env
;
276 EnterCriticalSection( ¤t_envdb
.section
);
277 env
= p
= current_envdb
.environ
;
279 /* Find a place to insert the string */
285 if (!lstrncmpiA( name
, p
, len
) && (p
[len
] == '=')) break;
288 if (!value
&& !*p
) goto done
; /* Value to remove doesn't exist */
290 /* Realloc the buffer */
292 len
= value
? strlen(name
) + strlen(value
) + 2 : 0;
293 if (*p
) len
-= strlen(p
) + 1; /* The name already exists */
294 old_size
= HeapSize( GetProcessHeap(), 0, env
);
297 LPSTR next
= p
+ strlen(p
) + 1; /* We know there is a next one */
298 memmove( next
+ len
, next
, old_size
- (next
- env
) );
300 if (!(new_env
= HeapReAlloc( GetProcessHeap(), 0, env
, old_size
+ len
)))
302 if (current_envdb
.env_sel
)
303 SELECTOR_MoveBlock( current_envdb
.env_sel
, new_env
);
304 p
= new_env
+ (p
- env
);
305 if (len
> 0) memmove( p
+ len
, p
, old_size
- (p
- new_env
) );
307 /* Set the new string */
315 current_envdb
.environ
= new_env
;
319 LeaveCriticalSection( ¤t_envdb
.section
);
324 /***********************************************************************
325 * SetEnvironmentVariableW (KERNEL32.642)
327 BOOL WINAPI
SetEnvironmentVariableW( LPCWSTR name
, LPCWSTR value
)
329 LPSTR nameA
= HEAP_strdupWtoA( GetProcessHeap(), 0, name
);
330 LPSTR valueA
= HEAP_strdupWtoA( GetProcessHeap(), 0, value
);
331 BOOL ret
= SetEnvironmentVariableA( nameA
, valueA
);
332 HeapFree( GetProcessHeap(), 0, nameA
);
333 HeapFree( GetProcessHeap(), 0, valueA
);
338 /***********************************************************************
339 * ExpandEnvironmentStringsA (KERNEL32.216)
341 * Note: overlapping buffers are not supported; this is how it should be.
343 DWORD WINAPI
ExpandEnvironmentStringsA( LPCSTR src
, LPSTR dst
, DWORD count
)
345 DWORD len
, total_size
= 1; /* 1 for terminating '\0' */
348 if (!count
) dst
= NULL
;
349 EnterCriticalSection( ¤t_envdb
.section
);
355 if ((p
= strchr( src
, '%' ))) len
= p
- src
;
356 else len
= strlen(src
);
360 else /* we are at the start of a variable */
362 if ((p
= strchr( src
+ 1, '%' )))
364 len
= p
- src
- 1; /* Length of the variable name */
365 if ((var
= ENV_FindVariable( current_envdb
.environ
,
368 src
+= len
+ 2; /* Skip the variable name */
373 var
= src
; /* Copy original name instead */
378 else /* unfinished variable name, ignore it */
381 len
= strlen(src
); /* Copy whole string */
388 if (count
< len
) len
= count
;
389 memcpy( dst
, var
, len
);
394 LeaveCriticalSection( ¤t_envdb
.section
);
396 /* Null-terminate the string */
406 /***********************************************************************
407 * ExpandEnvironmentStringsW (KERNEL32.217)
409 DWORD WINAPI
ExpandEnvironmentStringsW( LPCWSTR src
, LPWSTR dst
, DWORD len
)
411 LPSTR srcA
= HEAP_strdupWtoA( GetProcessHeap(), 0, src
);
412 LPSTR dstA
= dst
? HeapAlloc( GetProcessHeap(), 0, len
) : NULL
;
413 DWORD ret
= ExpandEnvironmentStringsA( srcA
, dstA
, len
);
416 lstrcpyAtoW( dst
, dstA
);
417 HeapFree( GetProcessHeap(), 0, dstA
);
419 HeapFree( GetProcessHeap(), 0, srcA
);
424 /***********************************************************************
425 * GetStdHandle (KERNEL32.276)
427 HANDLE WINAPI
GetStdHandle( DWORD std_handle
)
431 case STD_INPUT_HANDLE
: return current_envdb
.hStdin
;
432 case STD_OUTPUT_HANDLE
: return current_envdb
.hStdout
;
433 case STD_ERROR_HANDLE
: return current_envdb
.hStderr
;
435 SetLastError( ERROR_INVALID_PARAMETER
);
436 return INVALID_HANDLE_VALUE
;
440 /***********************************************************************
441 * SetStdHandle (KERNEL32.506)
443 BOOL WINAPI
SetStdHandle( DWORD std_handle
, HANDLE handle
)
447 case STD_INPUT_HANDLE
: current_envdb
.hStdin
= handle
; return TRUE
;
448 case STD_OUTPUT_HANDLE
: current_envdb
.hStdout
= handle
; return TRUE
;
449 case STD_ERROR_HANDLE
: current_envdb
.hStderr
= handle
; return TRUE
;
451 SetLastError( ERROR_INVALID_PARAMETER
);
456 /***********************************************************************
457 * GetStartupInfoA (KERNEL32.273)
459 VOID WINAPI
GetStartupInfoA( LPSTARTUPINFOA info
)
461 *info
= current_startupinfo
;
465 /***********************************************************************
466 * GetStartupInfoW (KERNEL32.274)
468 VOID WINAPI
GetStartupInfoW( LPSTARTUPINFOW info
)
470 info
->cb
= sizeof(STARTUPINFOW
);
471 info
->dwX
= current_startupinfo
.dwX
;
472 info
->dwY
= current_startupinfo
.dwY
;
473 info
->dwXSize
= current_startupinfo
.dwXSize
;
474 info
->dwXCountChars
= current_startupinfo
.dwXCountChars
;
475 info
->dwYCountChars
= current_startupinfo
.dwYCountChars
;
476 info
->dwFillAttribute
= current_startupinfo
.dwFillAttribute
;
477 info
->dwFlags
= current_startupinfo
.dwFlags
;
478 info
->wShowWindow
= current_startupinfo
.wShowWindow
;
479 info
->cbReserved2
= current_startupinfo
.cbReserved2
;
480 info
->lpReserved2
= current_startupinfo
.lpReserved2
;
481 info
->hStdInput
= current_startupinfo
.hStdInput
;
482 info
->hStdOutput
= current_startupinfo
.hStdOutput
;
483 info
->hStdError
= current_startupinfo
.hStdError
;
484 info
->lpReserved
= HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo
.lpReserved
);
485 info
->lpDesktop
= HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo
.lpDesktop
);
486 info
->lpTitle
= HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo
.lpTitle
);