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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
30 #include "wine/unicode.h"
31 #include "wine/debug.h"
32 #include "ntdll_misc.h"
34 WINE_DEFAULT_DEBUG_CHANNEL(environ);
36 /******************************************************************************
37 * RtlCreateEnvironment [NTDLL.@]
39 NTSTATUS WINAPI RtlCreateEnvironment(BOOLEAN inherit, PWSTR* env)
43 TRACE("(%u,%p)!\n", inherit, env);
47 MEMORY_BASIC_INFORMATION mbi;
51 nts = NtQueryVirtualMemory(NtCurrentProcess(), ntdll_get_process_pmts()->Environment,
52 0, &mbi, sizeof(mbi), NULL);
53 if (nts == STATUS_SUCCESS)
56 nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)env, 0, &mbi.RegionSize,
57 MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
58 if (nts == STATUS_SUCCESS)
59 memcpy(*env, ntdll_get_process_pmts()->Environment, mbi.RegionSize);
67 nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)env, 0, &size,
68 MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
69 if (nts == STATUS_SUCCESS)
70 memset(*env, 0, size);
76 /******************************************************************************
77 * RtlDestroyEnvironment [NTDLL.@]
79 NTSTATUS WINAPI RtlDestroyEnvironment(PWSTR env)
83 TRACE("(%p)!\n", env);
85 return NtFreeVirtualMemory(NtCurrentProcess(), (void**)&env, &size, MEM_RELEASE);
88 static LPCWSTR ENV_FindVariable(PCWSTR var, PCWSTR name, unsigned namelen)
90 for (; *var; var += strlenW(var) + 1)
92 /* match var names, but avoid setting a var with a name including a '='
93 * (a starting '=' is valid though)
95 if (strncmpiW(var, name, namelen) == 0 && var[namelen] == '=' &&
96 strchrW(var + 1, '=') == var + namelen)
98 return var + namelen + 1;
104 /******************************************************************
105 * RtlQueryEnvironmentVariable_U [NTDLL.@]
107 * NOTES: when the buffer is too small, the string is not written, but if the
108 * terminating null char is the only char that cannot be written, then
109 * all chars (except the null) are written and success is returned
110 * (behavior of Win2k at least)
112 NTSTATUS WINAPI RtlQueryEnvironmentVariable_U(PWSTR env,
113 PUNICODE_STRING name,
114 PUNICODE_STRING value)
116 NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
120 TRACE("%s %s %p\n", debugstr_w(env), debugstr_w(name->Buffer), value);
123 namelen = name->Length / sizeof(WCHAR);
124 if (!namelen) return nts;
129 var = ntdll_get_process_pmts()->Environment;
133 var = ENV_FindVariable(var, name->Buffer, namelen);
136 value->Length = strlenW(var) * sizeof(WCHAR);
138 if (value->Length <= value->MaximumLength)
140 memmove(value->Buffer, var, min(value->Length + sizeof(WCHAR), value->MaximumLength));
141 nts = STATUS_SUCCESS;
143 else nts = STATUS_BUFFER_TOO_SMALL;
146 if (!env) RtlReleasePebLock();
151 /******************************************************************
152 * RtlSetCurrentEnvironment [NTDLL.@]
155 void WINAPI RtlSetCurrentEnvironment(PWSTR new_env, PWSTR* old_env)
157 TRACE("(%p %p)\n", new_env, old_env);
161 if (old_env) *old_env = ntdll_get_process_pmts()->Environment;
162 ntdll_get_process_pmts()->Environment = new_env;
168 /******************************************************************************
169 * RtlSetEnvironmentVariable [NTDLL.@]
171 NTSTATUS WINAPI RtlSetEnvironmentVariable(PWSTR* penv, PUNICODE_STRING name,
172 PUNICODE_STRING value)
176 NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
177 MEMORY_BASIC_INFORMATION mbi;
179 TRACE("(%p,%s,%s)\n",
180 penv, debugstr_w(name->Buffer),
181 value ? debugstr_w(value->Buffer) : "--nil--");
183 if (!name || !name->Buffer || !name->Buffer[0])
184 return STATUS_INVALID_PARAMETER_1;
185 /* variable names can't contain a '=' except as a first character */
186 if (strchrW(name->Buffer + 1, '=')) return STATUS_INVALID_PARAMETER;
191 env = ntdll_get_process_pmts()->Environment;
194 len = name->Length / sizeof(WCHAR);
196 /* compute current size of environment */
197 for (p = env; *p; p += strlenW(p) + 1);
198 old_size = p + 1 - env;
200 /* Find a place to insert the string */
201 for (p = env; *p; p += strlenW(p) + 1)
203 if (!strncmpiW(name->Buffer, p, len) && (p[len] == '=')) break;
205 if (!value && !*p) goto done; /* Value to remove doesn't exist */
207 /* Realloc the buffer */
208 len = value ? len + value->Length / sizeof(WCHAR) + 2 : 0;
209 if (*p) len -= strlenW(p) + 1; /* The name already exists */
213 LPWSTR next = p + strlenW(p) + 1; /* We know there is a next one */
214 memmove(next + len, next, (old_size - (next - env)) * sizeof(WCHAR));
217 nts = NtQueryVirtualMemory(NtCurrentProcess(), env, 0,
218 &mbi, sizeof(mbi), NULL);
219 if (nts != STATUS_SUCCESS) goto done;
221 if ((old_size + len) * sizeof(WCHAR) > mbi.RegionSize)
224 ULONG new_size = (old_size + len) * sizeof(WCHAR);
227 nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)&new_env, 0,
228 &new_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
229 if (nts != STATUS_SUCCESS) goto done;
231 memmove(new_env, env, (p - env) * sizeof(WCHAR));
233 memmove(new_env + (p - env) + len, p, (old_size - (p - env)) * sizeof(WCHAR));
234 p = new_env + (p - env);
236 RtlDestroyEnvironment(env);
237 if (!penv) ntdll_get_process_pmts()->Environment = new_env;
238 else *penv = new_env;
243 if (len > 0) memmove(p + len, p, (old_size - (p - env)) * sizeof(WCHAR));
246 /* Set the new string */
249 static const WCHAR equalW[] = {'=',0};
251 strcpyW(p, name->Buffer);
253 strcatW(p, value->Buffer);
256 if (!penv) RtlReleasePebLock();
261 /******************************************************************
262 * RtlExpandEnvironmentStrings_U (NTDLL.@)
265 NTSTATUS WINAPI RtlExpandEnvironmentStrings_U(PWSTR renv, const UNICODE_STRING* us_src,
266 PUNICODE_STRING us_dst, PULONG plen)
268 DWORD len, count, total_size = 1; /* 1 for terminating '\0' */
269 LPCWSTR env, src, p, var;
272 src = us_src->Buffer;
273 count = us_dst->MaximumLength / sizeof(WCHAR);
274 dst = count ? us_dst->Buffer : NULL;
279 env = ntdll_get_process_pmts()->Environment;
287 if ((p = strchrW( src, '%' ))) len = p - src;
288 else len = strlenW(src);
292 else /* we are at the start of a variable */
294 if ((p = strchrW( src + 1, '%' )))
296 len = p - src - 1; /* Length of the variable name */
297 if ((var = ENV_FindVariable( env, src + 1, len )))
299 src += len + 2; /* Skip the variable name */
304 var = src; /* Copy original name instead */
309 else /* unfinished variable name, ignore it */
312 len = strlenW(src); /* Copy whole string */
319 if (count < len) len = count;
320 memcpy(dst, var, len * sizeof(WCHAR));
326 if (!renv) RtlReleasePebLock();
328 /* Null-terminate the string */
329 if (dst && count) *dst = '\0';
331 us_dst->Length = (dst) ? (dst - us_dst->Buffer) * sizeof(WCHAR) : 0;
332 if (plen) *plen = total_size * sizeof(WCHAR);
334 return (count) ? STATUS_SUCCESS : STATUS_BUFFER_TOO_SMALL;
338 static inline void normalize( void *base, WCHAR **ptr )
340 if (*ptr) *ptr = (WCHAR *)((char *)base + (UINT_PTR)*ptr);
343 /******************************************************************************
344 * RtlNormalizeProcessParams [NTDLL.@]
346 PRTL_USER_PROCESS_PARAMETERS WINAPI RtlNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
348 if (params && !(params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
350 normalize( params, ¶ms->CurrentDirectoryName.Buffer );
351 normalize( params, ¶ms->DllPath.Buffer );
352 normalize( params, ¶ms->ImagePathName.Buffer );
353 normalize( params, ¶ms->CommandLine.Buffer );
354 normalize( params, ¶ms->WindowTitle.Buffer );
355 normalize( params, ¶ms->Desktop.Buffer );
356 normalize( params, ¶ms->ShellInfo.Buffer );
357 normalize( params, ¶ms->RuntimeInfo.Buffer );
358 params->Flags |= PROCESS_PARAMS_FLAG_NORMALIZED;
364 static inline void denormalize( void *base, WCHAR **ptr )
366 if (*ptr) *ptr = (WCHAR *)(UINT_PTR)((char *)*ptr - (char *)base);
369 /******************************************************************************
370 * RtlDeNormalizeProcessParams [NTDLL.@]
372 PRTL_USER_PROCESS_PARAMETERS WINAPI RtlDeNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
374 if (params && (params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
376 denormalize( params, ¶ms->CurrentDirectoryName.Buffer );
377 denormalize( params, ¶ms->DllPath.Buffer );
378 denormalize( params, ¶ms->ImagePathName.Buffer );
379 denormalize( params, ¶ms->CommandLine.Buffer );
380 denormalize( params, ¶ms->WindowTitle.Buffer );
381 denormalize( params, ¶ms->Desktop.Buffer );
382 denormalize( params, ¶ms->ShellInfo.Buffer );
383 denormalize( params, ¶ms->RuntimeInfo.Buffer );
384 params->Flags &= ~PROCESS_PARAMS_FLAG_NORMALIZED;
390 /* append a unicode string to the process params data; helper for RtlCreateProcessParameters */
391 static void append_unicode_string( void **data, const UNICODE_STRING *src,
392 UNICODE_STRING *dst )
394 dst->Length = src->Length;
395 dst->MaximumLength = src->MaximumLength;
397 memcpy( dst->Buffer, src->Buffer, dst->MaximumLength );
398 *data = (char *)dst->Buffer + dst->MaximumLength;
402 /******************************************************************************
403 * RtlCreateProcessParameters [NTDLL.@]
405 NTSTATUS WINAPI RtlCreateProcessParameters( RTL_USER_PROCESS_PARAMETERS **result,
406 const UNICODE_STRING *ImagePathName,
407 const UNICODE_STRING *DllPath,
408 const UNICODE_STRING *CurrentDirectoryName,
409 const UNICODE_STRING *CommandLine,
411 const UNICODE_STRING *WindowTitle,
412 const UNICODE_STRING *Desktop,
413 const UNICODE_STRING *ShellInfo,
414 const UNICODE_STRING *RuntimeInfo )
416 static const WCHAR empty[] = {0};
417 static const UNICODE_STRING empty_str = { 0, sizeof(empty), (WCHAR *)empty };
419 const RTL_USER_PROCESS_PARAMETERS *cur_params;
420 ULONG size, total_size;
425 cur_params = NtCurrentTeb()->Peb->ProcessParameters;
426 if (!DllPath) DllPath = &cur_params->DllPath;
427 if (!CurrentDirectoryName) CurrentDirectoryName = &cur_params->CurrentDirectoryName;
428 if (!CommandLine) CommandLine = ImagePathName;
429 if (!Environment) Environment = cur_params->Environment;
430 if (!WindowTitle) WindowTitle = &empty_str;
431 if (!Desktop) Desktop = &empty_str;
432 if (!ShellInfo) ShellInfo = &empty_str;
433 if (!RuntimeInfo) RuntimeInfo = &empty_str;
435 size = (sizeof(RTL_USER_PROCESS_PARAMETERS)
436 + ImagePathName->MaximumLength
437 + DllPath->MaximumLength
438 + CurrentDirectoryName->MaximumLength
439 + CommandLine->MaximumLength
440 + WindowTitle->MaximumLength
441 + Desktop->MaximumLength
442 + ShellInfo->MaximumLength
443 + RuntimeInfo->MaximumLength);
446 if ((status = NtAllocateVirtualMemory( NtCurrentProcess(), &ptr, NULL, &total_size,
447 MEM_COMMIT, PAGE_READWRITE )) == STATUS_SUCCESS)
449 RTL_USER_PROCESS_PARAMETERS *params = ptr;
450 params->AllocationSize = total_size;
452 params->Flags = PROCESS_PARAMS_FLAG_NORMALIZED;
453 params->ProcessGroup = cur_params->ProcessGroup;
454 params->Environment = Environment;
455 /* all other fields are zero */
458 append_unicode_string( &ptr, CurrentDirectoryName, ¶ms->CurrentDirectoryName );
459 append_unicode_string( &ptr, DllPath, ¶ms->DllPath );
460 append_unicode_string( &ptr, ImagePathName, ¶ms->ImagePathName );
461 append_unicode_string( &ptr, CommandLine, ¶ms->CommandLine );
462 append_unicode_string( &ptr, WindowTitle, ¶ms->WindowTitle );
463 append_unicode_string( &ptr, Desktop, ¶ms->Desktop );
464 append_unicode_string( &ptr, ShellInfo, ¶ms->ShellInfo );
465 append_unicode_string( &ptr, RuntimeInfo, ¶ms->RuntimeInfo );
466 *result = RtlDeNormalizeProcessParams( params );
473 /******************************************************************************
474 * RtlDestroyProcessParameters [NTDLL.@]
476 void WINAPI RtlDestroyProcessParameters( RTL_USER_PROCESS_PARAMETERS *params )
480 NtFreeVirtualMemory( NtCurrentProcess(), &ptr, &size, MEM_RELEASE );