2 * Process environment management
4 * Copyright 1996, 1998 Alexandre Julliard
14 #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 (!strncasecmp( 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, WINE_LDT_FLAGS_DATA );
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 );
246 SetLastError( ERROR_ENVVAR_NOT_FOUND );
251 /***********************************************************************
252 * GetEnvironmentVariableW (KERNEL32.323)
254 DWORD WINAPI GetEnvironmentVariableW( LPCWSTR nameW, LPWSTR valW, DWORD size)
256 LPSTR name = HEAP_strdupWtoA( GetProcessHeap(), 0, nameW );
257 LPSTR val = valW ? HeapAlloc( GetProcessHeap(), 0, size ) : NULL;
258 DWORD res = GetEnvironmentVariableA( name, val, size );
259 HeapFree( GetProcessHeap(), 0, name );
262 if (size > 0 && !MultiByteToWideChar( CP_ACP, 0, val, -1, valW, size ))
264 HeapFree( GetProcessHeap(), 0, val );
270 /***********************************************************************
271 * SetEnvironmentVariableA (KERNEL32.641)
273 BOOL WINAPI SetEnvironmentVariableA( LPCSTR name, LPCSTR value )
275 INT old_size, len, res;
276 LPSTR p, env, new_env;
279 EnterCriticalSection( ¤t_envdb.section );
280 env = p = current_envdb.environ;
282 /* Find a place to insert the string */
288 if (!strncasecmp( name, p, len ) && (p[len] == '=')) break;
291 if (!value && !*p) goto done; /* Value to remove doesn't exist */
293 /* Realloc the buffer */
295 len = value ? strlen(name) + strlen(value) + 2 : 0;
296 if (*p) len -= strlen(p) + 1; /* The name already exists */
297 old_size = HeapSize( GetProcessHeap(), 0, env );
300 LPSTR next = p + strlen(p) + 1; /* We know there is a next one */
301 memmove( next + len, next, old_size - (next - env) );
303 if (!(new_env = HeapReAlloc( GetProcessHeap(), 0, env, old_size + len )))
305 if (current_envdb.env_sel)
306 current_envdb.env_sel = SELECTOR_ReallocBlock( current_envdb.env_sel,
307 new_env, old_size + len );
308 p = new_env + (p - env);
309 if (len > 0) memmove( p + len, p, old_size - (p - new_env) );
311 /* Set the new string */
319 current_envdb.environ = new_env;
323 LeaveCriticalSection( ¤t_envdb.section );
328 /***********************************************************************
329 * SetEnvironmentVariableW (KERNEL32.642)
331 BOOL WINAPI SetEnvironmentVariableW( LPCWSTR name, LPCWSTR value )
333 LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
334 LPSTR valueA = HEAP_strdupWtoA( GetProcessHeap(), 0, value );
335 BOOL ret = SetEnvironmentVariableA( nameA, valueA );
336 HeapFree( GetProcessHeap(), 0, nameA );
337 HeapFree( GetProcessHeap(), 0, valueA );
342 /***********************************************************************
343 * ExpandEnvironmentStringsA (KERNEL32.216)
345 * Note: overlapping buffers are not supported; this is how it should be.
347 DWORD WINAPI ExpandEnvironmentStringsA( LPCSTR src, LPSTR dst, DWORD count )
349 DWORD len, total_size = 1; /* 1 for terminating '\0' */
352 if (!count) dst = NULL;
353 EnterCriticalSection( ¤t_envdb.section );
359 if ((p = strchr( src, '%' ))) len = p - src;
360 else len = strlen(src);
364 else /* we are at the start of a variable */
366 if ((p = strchr( src + 1, '%' )))
368 len = p - src - 1; /* Length of the variable name */
369 if ((var = ENV_FindVariable( current_envdb.environ,
372 src += len + 2; /* Skip the variable name */
377 var = src; /* Copy original name instead */
382 else /* unfinished variable name, ignore it */
385 len = strlen(src); /* Copy whole string */
392 if (count < len) len = count;
393 memcpy( dst, var, len );
398 LeaveCriticalSection( ¤t_envdb.section );
400 /* Null-terminate the string */
410 /***********************************************************************
411 * ExpandEnvironmentStringsW (KERNEL32.217)
413 DWORD WINAPI ExpandEnvironmentStringsW( LPCWSTR src, LPWSTR dst, DWORD len )
415 LPSTR srcA = HEAP_strdupWtoA( GetProcessHeap(), 0, src );
416 LPSTR dstA = dst ? HeapAlloc( GetProcessHeap(), 0, len ) : NULL;
417 DWORD ret = ExpandEnvironmentStringsA( srcA, dstA, len );
420 ret = MultiByteToWideChar( CP_ACP, 0, dstA, -1, dst, len );
421 HeapFree( GetProcessHeap(), 0, dstA );
423 HeapFree( GetProcessHeap(), 0, srcA );
428 /***********************************************************************
429 * GetStdHandle (KERNEL32.276)
431 HANDLE WINAPI GetStdHandle( DWORD std_handle )
435 case STD_INPUT_HANDLE: return current_envdb.hStdin;
436 case STD_OUTPUT_HANDLE: return current_envdb.hStdout;
437 case STD_ERROR_HANDLE: return current_envdb.hStderr;
439 SetLastError( ERROR_INVALID_PARAMETER );
440 return INVALID_HANDLE_VALUE;
444 /***********************************************************************
445 * SetStdHandle (KERNEL32.506)
447 BOOL WINAPI SetStdHandle( DWORD std_handle, HANDLE handle )
451 case STD_INPUT_HANDLE: current_envdb.hStdin = handle; return TRUE;
452 case STD_OUTPUT_HANDLE: current_envdb.hStdout = handle; return TRUE;
453 case STD_ERROR_HANDLE: current_envdb.hStderr = handle; return TRUE;
455 SetLastError( ERROR_INVALID_PARAMETER );
460 /***********************************************************************
461 * GetStartupInfoA (KERNEL32.273)
463 VOID WINAPI GetStartupInfoA( LPSTARTUPINFOA info )
465 *info = current_startupinfo;
469 /***********************************************************************
470 * GetStartupInfoW (KERNEL32.274)
472 VOID WINAPI GetStartupInfoW( LPSTARTUPINFOW info )
474 info->cb = sizeof(STARTUPINFOW);
475 info->dwX = current_startupinfo.dwX;
476 info->dwY = current_startupinfo.dwY;
477 info->dwXSize = current_startupinfo.dwXSize;
478 info->dwXCountChars = current_startupinfo.dwXCountChars;
479 info->dwYCountChars = current_startupinfo.dwYCountChars;
480 info->dwFillAttribute = current_startupinfo.dwFillAttribute;
481 info->dwFlags = current_startupinfo.dwFlags;
482 info->wShowWindow = current_startupinfo.wShowWindow;
483 info->cbReserved2 = current_startupinfo.cbReserved2;
484 info->lpReserved2 = current_startupinfo.lpReserved2;
485 info->hStdInput = current_startupinfo.hStdInput;
486 info->hStdOutput = current_startupinfo.hStdOutput;
487 info->hStdError = current_startupinfo.hStdError;
488 info->lpReserved = HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo.lpReserved );
489 info->lpDesktop = HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo.lpDesktop );
490 info->lpTitle = HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo.lpTitle );