2 * Ntdll environment functions
4 * Copyright 1996, 1998 Alexandre Julliard
5 * Copyright 2003 Eric Pouech
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
27 #define WIN32_NO_STATUS
30 #include "wine/unicode.h"
31 #include "wine/debug.h"
33 #include "ntdll_misc.h"
35 WINE_DEFAULT_DEBUG_CHANNEL(environ);
37 /******************************************************************************
38 * RtlCreateEnvironment [NTDLL.@]
40 NTSTATUS WINAPI RtlCreateEnvironment(BOOLEAN inherit, PWSTR* env)
44 TRACE("(%u,%p)!\n", inherit, env);
48 MEMORY_BASIC_INFORMATION mbi;
52 nts = NtQueryVirtualMemory(NtCurrentProcess(),
53 NtCurrentTeb()->Peb->ProcessParameters->Environment,
54 0, &mbi, sizeof(mbi), NULL);
55 if (nts == STATUS_SUCCESS)
58 nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)env, 0, &mbi.RegionSize,
59 MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
60 if (nts == STATUS_SUCCESS)
61 memcpy(*env, NtCurrentTeb()->Peb->ProcessParameters->Environment, mbi.RegionSize);
70 nts = NtAllocateVirtualMemory(NtCurrentProcess(), &addr, 0, &size,
71 MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
72 if (nts == STATUS_SUCCESS) *env = addr;
78 /******************************************************************************
79 * RtlDestroyEnvironment [NTDLL.@]
81 NTSTATUS WINAPI RtlDestroyEnvironment(PWSTR env)
85 TRACE("(%p)!\n", env);
87 return NtFreeVirtualMemory(NtCurrentProcess(), (void**)&env, &size, MEM_RELEASE);
90 static LPCWSTR ENV_FindVariable(PCWSTR var, PCWSTR name, unsigned namelen)
92 for (; *var; var += strlenW(var) + 1)
94 /* match var names, but avoid setting a var with a name including a '='
95 * (a starting '=' is valid though)
97 if (strncmpiW(var, name, namelen) == 0 && var[namelen] == '=' &&
98 strchrW(var + 1, '=') == var + namelen)
100 return var + namelen + 1;
106 /******************************************************************
107 * RtlQueryEnvironmentVariable_U [NTDLL.@]
109 * NOTES: when the buffer is too small, the string is not written, but if the
110 * terminating null char is the only char that cannot be written, then
111 * all chars (except the null) are written and success is returned
112 * (behavior of Win2k at least)
114 NTSTATUS WINAPI RtlQueryEnvironmentVariable_U(PWSTR env,
115 PUNICODE_STRING name,
116 PUNICODE_STRING value)
118 NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
122 TRACE("%p %s %p\n", env, debugstr_us(name), value);
125 namelen = name->Length / sizeof(WCHAR);
126 if (!namelen) return nts;
131 var = NtCurrentTeb()->Peb->ProcessParameters->Environment;
135 var = ENV_FindVariable(var, name->Buffer, namelen);
138 value->Length = strlenW(var) * sizeof(WCHAR);
140 if (value->Length <= value->MaximumLength)
142 memmove(value->Buffer, var, min(value->Length + sizeof(WCHAR), value->MaximumLength));
143 nts = STATUS_SUCCESS;
145 else nts = STATUS_BUFFER_TOO_SMALL;
148 if (!env) RtlReleasePebLock();
153 /******************************************************************
154 * RtlSetCurrentEnvironment [NTDLL.@]
157 void WINAPI RtlSetCurrentEnvironment(PWSTR new_env, PWSTR* old_env)
159 TRACE("(%p %p)\n", new_env, old_env);
163 if (old_env) *old_env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
164 NtCurrentTeb()->Peb->ProcessParameters->Environment = new_env;
170 /******************************************************************************
171 * RtlSetEnvironmentVariable [NTDLL.@]
173 NTSTATUS WINAPI RtlSetEnvironmentVariable(PWSTR* penv, PUNICODE_STRING name,
174 PUNICODE_STRING value)
178 NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
179 MEMORY_BASIC_INFORMATION mbi;
181 TRACE("(%p, %s, %s)\n", penv, debugstr_us(name), debugstr_us(value));
183 if (!name || !name->Buffer || !name->Length)
184 return STATUS_INVALID_PARAMETER_1;
186 len = name->Length / sizeof(WCHAR);
188 /* variable names can't contain a '=' except as a first character */
189 for (p = name->Buffer + 1; p < name->Buffer + len; p++)
190 if (*p == '=') return STATUS_INVALID_PARAMETER;
195 env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
198 /* compute current size of environment */
199 for (p = env; *p; p += strlenW(p) + 1);
200 old_size = p + 1 - env;
202 /* Find a place to insert the string */
203 for (p = env; *p; p += strlenW(p) + 1)
205 if (!strncmpiW(name->Buffer, p, len) && (p[len] == '=')) break;
207 if (!value && !*p) goto done; /* Value to remove doesn't exist */
209 /* Realloc the buffer */
210 len = value ? len + value->Length / sizeof(WCHAR) + 2 : 0;
211 if (*p) len -= strlenW(p) + 1; /* The name already exists */
215 LPWSTR next = p + strlenW(p) + 1; /* We know there is a next one */
216 memmove(next + len, next, (old_size - (next - env)) * sizeof(WCHAR));
219 nts = NtQueryVirtualMemory(NtCurrentProcess(), env, 0,
220 &mbi, sizeof(mbi), NULL);
221 if (nts != STATUS_SUCCESS) goto done;
223 if ((old_size + len) * sizeof(WCHAR) > mbi.RegionSize)
226 SIZE_T new_size = (old_size + len) * sizeof(WCHAR);
229 nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)&new_env, 0,
230 &new_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
231 if (nts != STATUS_SUCCESS) goto done;
233 memmove(new_env, env, (p - env) * sizeof(WCHAR));
235 memmove(new_env + (p - env) + len, p, (old_size - (p - env)) * sizeof(WCHAR));
236 p = new_env + (p - env);
238 RtlDestroyEnvironment(env);
239 if (!penv) NtCurrentTeb()->Peb->ProcessParameters->Environment = new_env;
240 else *penv = new_env;
245 if (len > 0) memmove(p + len, p, (old_size - (p - env)) * sizeof(WCHAR));
248 /* Set the new string */
251 memcpy( p, name->Buffer, name->Length );
252 p += name->Length / sizeof(WCHAR);
254 memcpy( p, value->Buffer, value->Length );
255 p[value->Length / sizeof(WCHAR)] = 0;
258 if (!penv) RtlReleasePebLock();
263 /******************************************************************
264 * RtlExpandEnvironmentStrings_U (NTDLL.@)
267 NTSTATUS WINAPI RtlExpandEnvironmentStrings_U(PCWSTR renv, const UNICODE_STRING* us_src,
268 PUNICODE_STRING us_dst, PULONG plen)
270 DWORD src_len, len, count, total_size = 1; /* 1 for terminating '\0' */
271 LPCWSTR env, src, p, var;
274 src = us_src->Buffer;
275 src_len = us_src->Length / sizeof(WCHAR);
276 count = us_dst->MaximumLength / sizeof(WCHAR);
277 dst = count ? us_dst->Buffer : NULL;
282 env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
290 if ((p = memchrW( src, '%', src_len ))) len = p - src;
296 else /* we are at the start of a variable */
298 if ((p = memchrW( src + 1, '%', src_len - 1 )))
300 len = p - src - 1; /* Length of the variable name */
301 if ((var = ENV_FindVariable( env, src + 1, len )))
303 src += len + 2; /* Skip the variable name */
309 var = src; /* Copy original name instead */
315 else /* unfinished variable name, ignore it */
318 len = src_len; /* Copy whole string */
326 if (count < len) len = count;
327 memcpy(dst, var, len * sizeof(WCHAR));
333 if (!renv) RtlReleasePebLock();
335 /* Null-terminate the string */
336 if (dst && count) *dst = '\0';
338 us_dst->Length = (dst) ? (dst - us_dst->Buffer) * sizeof(WCHAR) : 0;
339 if (plen) *plen = total_size * sizeof(WCHAR);
341 return (count) ? STATUS_SUCCESS : STATUS_BUFFER_TOO_SMALL;
345 static inline void normalize( void *base, WCHAR **ptr )
347 if (*ptr) *ptr = (WCHAR *)((char *)base + (UINT_PTR)*ptr);
350 /******************************************************************************
351 * RtlNormalizeProcessParams [NTDLL.@]
353 PRTL_USER_PROCESS_PARAMETERS WINAPI RtlNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
355 if (params && !(params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
357 normalize( params, ¶ms->CurrentDirectory.DosPath.Buffer );
358 normalize( params, ¶ms->DllPath.Buffer );
359 normalize( params, ¶ms->ImagePathName.Buffer );
360 normalize( params, ¶ms->CommandLine.Buffer );
361 normalize( params, ¶ms->WindowTitle.Buffer );
362 normalize( params, ¶ms->Desktop.Buffer );
363 normalize( params, ¶ms->ShellInfo.Buffer );
364 normalize( params, ¶ms->RuntimeInfo.Buffer );
365 params->Flags |= PROCESS_PARAMS_FLAG_NORMALIZED;
371 static inline void denormalize( const void *base, WCHAR **ptr )
373 if (*ptr) *ptr = (WCHAR *)(UINT_PTR)((char *)*ptr - (const char *)base);
376 /******************************************************************************
377 * RtlDeNormalizeProcessParams [NTDLL.@]
379 PRTL_USER_PROCESS_PARAMETERS WINAPI RtlDeNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
381 if (params && (params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
383 denormalize( params, ¶ms->CurrentDirectory.DosPath.Buffer );
384 denormalize( params, ¶ms->DllPath.Buffer );
385 denormalize( params, ¶ms->ImagePathName.Buffer );
386 denormalize( params, ¶ms->CommandLine.Buffer );
387 denormalize( params, ¶ms->WindowTitle.Buffer );
388 denormalize( params, ¶ms->Desktop.Buffer );
389 denormalize( params, ¶ms->ShellInfo.Buffer );
390 denormalize( params, ¶ms->RuntimeInfo.Buffer );
391 params->Flags &= ~PROCESS_PARAMS_FLAG_NORMALIZED;
397 /* append a unicode string to the process params data; helper for RtlCreateProcessParameters */
398 static void append_unicode_string( void **data, const UNICODE_STRING *src,
399 UNICODE_STRING *dst )
401 dst->Length = src->Length;
402 dst->MaximumLength = src->MaximumLength;
404 memcpy( dst->Buffer, src->Buffer, dst->MaximumLength );
405 *data = (char *)dst->Buffer + dst->MaximumLength;
409 /******************************************************************************
410 * RtlCreateProcessParameters [NTDLL.@]
412 NTSTATUS WINAPI RtlCreateProcessParameters( RTL_USER_PROCESS_PARAMETERS **result,
413 const UNICODE_STRING *ImagePathName,
414 const UNICODE_STRING *DllPath,
415 const UNICODE_STRING *CurrentDirectoryName,
416 const UNICODE_STRING *CommandLine,
418 const UNICODE_STRING *WindowTitle,
419 const UNICODE_STRING *Desktop,
420 const UNICODE_STRING *ShellInfo,
421 const UNICODE_STRING *RuntimeInfo )
423 static WCHAR empty[] = {0};
424 static const UNICODE_STRING empty_str = { 0, sizeof(empty), empty };
425 static const UNICODE_STRING null_str = { 0, 0, NULL };
427 const RTL_USER_PROCESS_PARAMETERS *cur_params;
428 SIZE_T size, total_size;
433 cur_params = NtCurrentTeb()->Peb->ProcessParameters;
434 if (!DllPath) DllPath = &cur_params->DllPath;
435 if (!CurrentDirectoryName)
437 if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
438 CurrentDirectoryName = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir.DosPath;
440 CurrentDirectoryName = &cur_params->CurrentDirectory.DosPath;
442 if (!CommandLine) CommandLine = ImagePathName;
443 if (!Environment) Environment = cur_params->Environment;
444 if (!WindowTitle) WindowTitle = &empty_str;
445 if (!Desktop) Desktop = &empty_str;
446 if (!ShellInfo) ShellInfo = &empty_str;
447 if (!RuntimeInfo) RuntimeInfo = &null_str;
449 size = (sizeof(RTL_USER_PROCESS_PARAMETERS)
450 + ImagePathName->MaximumLength
451 + DllPath->MaximumLength
452 + CurrentDirectoryName->MaximumLength
453 + CommandLine->MaximumLength
454 + WindowTitle->MaximumLength
455 + Desktop->MaximumLength
456 + ShellInfo->MaximumLength
457 + RuntimeInfo->MaximumLength);
461 if ((status = NtAllocateVirtualMemory( NtCurrentProcess(), &ptr, 0, &total_size,
462 MEM_COMMIT, PAGE_READWRITE )) == STATUS_SUCCESS)
464 RTL_USER_PROCESS_PARAMETERS *params = ptr;
465 params->AllocationSize = total_size;
467 params->Flags = PROCESS_PARAMS_FLAG_NORMALIZED;
468 params->ConsoleFlags = cur_params->ConsoleFlags;
469 params->Environment = Environment;
470 /* all other fields are zero */
473 append_unicode_string( &ptr, CurrentDirectoryName, ¶ms->CurrentDirectory.DosPath );
474 append_unicode_string( &ptr, DllPath, ¶ms->DllPath );
475 append_unicode_string( &ptr, ImagePathName, ¶ms->ImagePathName );
476 append_unicode_string( &ptr, CommandLine, ¶ms->CommandLine );
477 append_unicode_string( &ptr, WindowTitle, ¶ms->WindowTitle );
478 append_unicode_string( &ptr, Desktop, ¶ms->Desktop );
479 append_unicode_string( &ptr, ShellInfo, ¶ms->ShellInfo );
480 append_unicode_string( &ptr, RuntimeInfo, ¶ms->RuntimeInfo );
481 *result = RtlDeNormalizeProcessParams( params );
488 /******************************************************************************
489 * RtlDestroyProcessParameters [NTDLL.@]
491 void WINAPI RtlDestroyProcessParameters( RTL_USER_PROCESS_PARAMETERS *params )
495 NtFreeVirtualMemory( NtCurrentProcess(), &ptr, &size, MEM_RELEASE );