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508 lines
17 KiB
C
508 lines
17 KiB
C
/*
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* Ntdll environment functions
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*
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* Copyright 1996, 1998 Alexandre Julliard
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* Copyright 2003 Eric Pouech
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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#include "config.h"
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#include <assert.h>
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#include <stdarg.h>
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#include "ntstatus.h"
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#define WIN32_NO_STATUS
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#include "windef.h"
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#include "winternl.h"
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#include "wine/unicode.h"
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#include "wine/debug.h"
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#include "ntdll_misc.h"
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#include "winnt.h"
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WINE_DEFAULT_DEBUG_CHANNEL(environ);
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/******************************************************************************
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* NtQuerySystemEnvironmentValue [NTDLL.@]
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*/
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NTSYSAPI NTSTATUS WINAPI NtQuerySystemEnvironmentValue(PUNICODE_STRING VariableName,
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PWCHAR Value,
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ULONG ValueBufferLength,
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PULONG RequiredLength)
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{
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FIXME("stub!\n");
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return STATUS_NOT_IMPLEMENTED;
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}
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/******************************************************************************
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* RtlCreateEnvironment [NTDLL.@]
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*/
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NTSTATUS WINAPI RtlCreateEnvironment(BOOLEAN inherit, PWSTR* env)
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{
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NTSTATUS nts;
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TRACE("(%u,%p)!\n", inherit, env);
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if (inherit)
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{
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MEMORY_BASIC_INFORMATION mbi;
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RtlAcquirePebLock();
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nts = NtQueryVirtualMemory(NtCurrentProcess(),
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NtCurrentTeb()->Peb->ProcessParameters->Environment,
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0, &mbi, sizeof(mbi), NULL);
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if (nts == STATUS_SUCCESS)
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{
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*env = NULL;
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nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)env, 0, &mbi.RegionSize,
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MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
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if (nts == STATUS_SUCCESS)
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memcpy(*env, NtCurrentTeb()->Peb->ProcessParameters->Environment, mbi.RegionSize);
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else *env = NULL;
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}
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RtlReleasePebLock();
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}
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else
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{
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SIZE_T size = 1;
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PVOID addr = NULL;
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nts = NtAllocateVirtualMemory(NtCurrentProcess(), &addr, 0, &size,
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MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
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if (nts == STATUS_SUCCESS) *env = addr;
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}
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return nts;
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}
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/******************************************************************************
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* RtlDestroyEnvironment [NTDLL.@]
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*/
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NTSTATUS WINAPI RtlDestroyEnvironment(PWSTR env)
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{
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SIZE_T size = 0;
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TRACE("(%p)!\n", env);
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return NtFreeVirtualMemory(NtCurrentProcess(), (void**)&env, &size, MEM_RELEASE);
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}
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static LPCWSTR ENV_FindVariable(PCWSTR var, PCWSTR name, unsigned namelen)
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{
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for (; *var; var += strlenW(var) + 1)
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{
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/* match var names, but avoid setting a var with a name including a '='
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* (a starting '=' is valid though)
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*/
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if (strncmpiW(var, name, namelen) == 0 && var[namelen] == '=' &&
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strchrW(var + 1, '=') == var + namelen)
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{
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return var + namelen + 1;
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}
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}
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return NULL;
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}
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/******************************************************************
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* RtlQueryEnvironmentVariable_U [NTDLL.@]
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*
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* NOTES: when the buffer is too small, the string is not written, but if the
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* terminating null char is the only char that cannot be written, then
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* all chars (except the null) are written and success is returned
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* (behavior of Win2k at least)
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*/
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NTSTATUS WINAPI RtlQueryEnvironmentVariable_U(PWSTR env,
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PUNICODE_STRING name,
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PUNICODE_STRING value)
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{
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NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
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PCWSTR var;
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unsigned namelen;
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TRACE("%p %s %p\n", env, debugstr_us(name), value);
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value->Length = 0;
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namelen = name->Length / sizeof(WCHAR);
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if (!namelen) return nts;
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if (!env)
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{
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RtlAcquirePebLock();
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var = NtCurrentTeb()->Peb->ProcessParameters->Environment;
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}
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else var = env;
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var = ENV_FindVariable(var, name->Buffer, namelen);
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if (var != NULL)
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{
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value->Length = strlenW(var) * sizeof(WCHAR);
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if (value->Length <= value->MaximumLength)
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{
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memmove(value->Buffer, var, min(value->Length + sizeof(WCHAR), value->MaximumLength));
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nts = STATUS_SUCCESS;
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}
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else nts = STATUS_BUFFER_TOO_SMALL;
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}
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if (!env) RtlReleasePebLock();
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return nts;
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}
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/******************************************************************
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* RtlSetCurrentEnvironment [NTDLL.@]
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*
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*/
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void WINAPI RtlSetCurrentEnvironment(PWSTR new_env, PWSTR* old_env)
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{
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TRACE("(%p %p)\n", new_env, old_env);
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RtlAcquirePebLock();
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if (old_env) *old_env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
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NtCurrentTeb()->Peb->ProcessParameters->Environment = new_env;
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RtlReleasePebLock();
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}
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/******************************************************************************
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* RtlSetEnvironmentVariable [NTDLL.@]
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*/
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NTSTATUS WINAPI RtlSetEnvironmentVariable(PWSTR* penv, PUNICODE_STRING name,
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PUNICODE_STRING value)
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{
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INT len, old_size;
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LPWSTR p, env;
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NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
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MEMORY_BASIC_INFORMATION mbi;
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TRACE("(%p, %s, %s)\n", penv, debugstr_us(name), debugstr_us(value));
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if (!name || !name->Buffer || !name->Length)
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return STATUS_INVALID_PARAMETER_1;
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len = name->Length / sizeof(WCHAR);
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/* variable names can't contain a '=' except as a first character */
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for (p = name->Buffer + 1; p < name->Buffer + len; p++)
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if (*p == '=') return STATUS_INVALID_PARAMETER;
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if (!penv)
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{
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RtlAcquirePebLock();
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env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
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} else env = *penv;
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/* compute current size of environment */
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for (p = env; *p; p += strlenW(p) + 1);
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old_size = p + 1 - env;
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/* Find a place to insert the string */
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for (p = env; *p; p += strlenW(p) + 1)
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{
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if (!strncmpiW(name->Buffer, p, len) && (p[len] == '=')) break;
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}
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if (!value && !*p) goto done; /* Value to remove doesn't exist */
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/* Realloc the buffer */
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len = value ? len + value->Length / sizeof(WCHAR) + 2 : 0;
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if (*p) len -= strlenW(p) + 1; /* The name already exists */
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if (len < 0)
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{
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LPWSTR next = p + strlenW(p) + 1; /* We know there is a next one */
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memmove(next + len, next, (old_size - (next - env)) * sizeof(WCHAR));
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}
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nts = NtQueryVirtualMemory(NtCurrentProcess(), env, 0,
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&mbi, sizeof(mbi), NULL);
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if (nts != STATUS_SUCCESS) goto done;
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if ((old_size + len) * sizeof(WCHAR) > mbi.RegionSize)
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{
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LPWSTR new_env;
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SIZE_T new_size = (old_size + len) * sizeof(WCHAR);
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new_env = NULL;
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nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)&new_env, 0,
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&new_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
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if (nts != STATUS_SUCCESS) goto done;
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memmove(new_env, env, (p - env) * sizeof(WCHAR));
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assert(len > 0);
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memmove(new_env + (p - env) + len, p, (old_size - (p - env)) * sizeof(WCHAR));
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p = new_env + (p - env);
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RtlDestroyEnvironment(env);
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if (!penv) NtCurrentTeb()->Peb->ProcessParameters->Environment = new_env;
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else *penv = new_env;
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}
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else
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{
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if (len > 0) memmove(p + len, p, (old_size - (p - env)) * sizeof(WCHAR));
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}
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/* Set the new string */
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if (value)
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{
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memcpy( p, name->Buffer, name->Length );
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p += name->Length / sizeof(WCHAR);
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*p++ = '=';
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memcpy( p, value->Buffer, value->Length );
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p[value->Length / sizeof(WCHAR)] = 0;
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}
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done:
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if (!penv) RtlReleasePebLock();
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return nts;
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}
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/******************************************************************
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* RtlExpandEnvironmentStrings_U (NTDLL.@)
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*
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*/
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NTSTATUS WINAPI RtlExpandEnvironmentStrings_U(PCWSTR renv, const UNICODE_STRING* us_src,
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PUNICODE_STRING us_dst, PULONG plen)
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{
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DWORD src_len, len, count, total_size = 1; /* 1 for terminating '\0' */
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LPCWSTR env, src, p, var;
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LPWSTR dst;
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src = us_src->Buffer;
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src_len = us_src->Length / sizeof(WCHAR);
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count = us_dst->MaximumLength / sizeof(WCHAR);
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dst = count ? us_dst->Buffer : NULL;
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if (!renv)
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{
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RtlAcquirePebLock();
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env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
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}
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else env = renv;
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while (src_len)
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{
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if (*src != '%')
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{
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if ((p = memchrW( src, '%', src_len ))) len = p - src;
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else len = src_len;
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var = src;
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src += len;
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src_len -= len;
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}
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else /* we are at the start of a variable */
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{
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if ((p = memchrW( src + 1, '%', src_len - 1 )))
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{
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len = p - src - 1; /* Length of the variable name */
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if ((var = ENV_FindVariable( env, src + 1, len )))
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{
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src += len + 2; /* Skip the variable name */
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src_len -= len + 2;
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len = strlenW(var);
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}
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else
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{
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var = src; /* Copy original name instead */
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len += 2;
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src += len;
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src_len -= len;
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}
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}
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else /* unfinished variable name, ignore it */
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{
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var = src;
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len = src_len; /* Copy whole string */
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src += len;
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src_len = 0;
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}
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}
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total_size += len;
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if (dst)
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{
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if (count < len) len = count;
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memcpy(dst, var, len * sizeof(WCHAR));
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count -= len;
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dst += len;
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}
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}
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if (!renv) RtlReleasePebLock();
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/* Null-terminate the string */
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if (dst && count) *dst = '\0';
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us_dst->Length = (dst) ? (dst - us_dst->Buffer) * sizeof(WCHAR) : 0;
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if (plen) *plen = total_size * sizeof(WCHAR);
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return (count) ? STATUS_SUCCESS : STATUS_BUFFER_TOO_SMALL;
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}
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static inline void normalize( void *base, WCHAR **ptr )
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{
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if (*ptr) *ptr = (WCHAR *)((char *)base + (UINT_PTR)*ptr);
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}
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/******************************************************************************
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* RtlNormalizeProcessParams [NTDLL.@]
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*/
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PRTL_USER_PROCESS_PARAMETERS WINAPI RtlNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
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{
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if (params && !(params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
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{
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normalize( params, ¶ms->CurrentDirectory.DosPath.Buffer );
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normalize( params, ¶ms->DllPath.Buffer );
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normalize( params, ¶ms->ImagePathName.Buffer );
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normalize( params, ¶ms->CommandLine.Buffer );
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normalize( params, ¶ms->WindowTitle.Buffer );
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normalize( params, ¶ms->Desktop.Buffer );
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normalize( params, ¶ms->ShellInfo.Buffer );
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normalize( params, ¶ms->RuntimeInfo.Buffer );
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params->Flags |= PROCESS_PARAMS_FLAG_NORMALIZED;
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}
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return params;
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}
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static inline void denormalize( const void *base, WCHAR **ptr )
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{
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if (*ptr) *ptr = (WCHAR *)(UINT_PTR)((char *)*ptr - (const char *)base);
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}
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/******************************************************************************
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* RtlDeNormalizeProcessParams [NTDLL.@]
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*/
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PRTL_USER_PROCESS_PARAMETERS WINAPI RtlDeNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
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{
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if (params && (params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
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{
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denormalize( params, ¶ms->CurrentDirectory.DosPath.Buffer );
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denormalize( params, ¶ms->DllPath.Buffer );
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denormalize( params, ¶ms->ImagePathName.Buffer );
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denormalize( params, ¶ms->CommandLine.Buffer );
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denormalize( params, ¶ms->WindowTitle.Buffer );
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denormalize( params, ¶ms->Desktop.Buffer );
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denormalize( params, ¶ms->ShellInfo.Buffer );
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denormalize( params, ¶ms->RuntimeInfo.Buffer );
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params->Flags &= ~PROCESS_PARAMS_FLAG_NORMALIZED;
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}
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return params;
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}
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/* append a unicode string to the process params data; helper for RtlCreateProcessParameters */
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static void append_unicode_string( void **data, const UNICODE_STRING *src,
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UNICODE_STRING *dst )
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{
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dst->Length = src->Length;
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dst->MaximumLength = src->MaximumLength;
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dst->Buffer = *data;
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memcpy( dst->Buffer, src->Buffer, dst->MaximumLength );
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*data = (char *)dst->Buffer + dst->MaximumLength;
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}
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/******************************************************************************
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* RtlCreateProcessParameters [NTDLL.@]
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*/
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NTSTATUS WINAPI RtlCreateProcessParameters( RTL_USER_PROCESS_PARAMETERS **result,
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const UNICODE_STRING *ImagePathName,
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const UNICODE_STRING *DllPath,
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const UNICODE_STRING *CurrentDirectoryName,
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const UNICODE_STRING *CommandLine,
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PWSTR Environment,
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const UNICODE_STRING *WindowTitle,
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const UNICODE_STRING *Desktop,
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const UNICODE_STRING *ShellInfo,
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const UNICODE_STRING *RuntimeInfo )
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{
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static WCHAR empty[] = {0};
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static const UNICODE_STRING empty_str = { 0, sizeof(empty), empty };
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static const UNICODE_STRING null_str = { 0, 0, NULL };
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const RTL_USER_PROCESS_PARAMETERS *cur_params;
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SIZE_T size, total_size;
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void *ptr;
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NTSTATUS status;
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RtlAcquirePebLock();
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cur_params = NtCurrentTeb()->Peb->ProcessParameters;
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if (!DllPath) DllPath = &cur_params->DllPath;
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if (!CurrentDirectoryName)
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{
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if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
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CurrentDirectoryName = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir.DosPath;
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else
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CurrentDirectoryName = &cur_params->CurrentDirectory.DosPath;
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}
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if (!CommandLine) CommandLine = ImagePathName;
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if (!Environment) Environment = cur_params->Environment;
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if (!WindowTitle) WindowTitle = &empty_str;
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if (!Desktop) Desktop = &empty_str;
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if (!ShellInfo) ShellInfo = &empty_str;
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if (!RuntimeInfo) RuntimeInfo = &null_str;
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size = (sizeof(RTL_USER_PROCESS_PARAMETERS)
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+ ImagePathName->MaximumLength
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+ DllPath->MaximumLength
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+ CurrentDirectoryName->MaximumLength
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+ CommandLine->MaximumLength
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+ WindowTitle->MaximumLength
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+ Desktop->MaximumLength
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+ ShellInfo->MaximumLength
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+ RuntimeInfo->MaximumLength);
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total_size = size;
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ptr = NULL;
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if ((status = NtAllocateVirtualMemory( NtCurrentProcess(), &ptr, 0, &total_size,
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MEM_COMMIT, PAGE_READWRITE )) == STATUS_SUCCESS)
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{
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RTL_USER_PROCESS_PARAMETERS *params = ptr;
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params->AllocationSize = total_size;
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params->Size = size;
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params->Flags = PROCESS_PARAMS_FLAG_NORMALIZED;
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params->ConsoleFlags = cur_params->ConsoleFlags;
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params->Environment = Environment;
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/* all other fields are zero */
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ptr = params + 1;
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append_unicode_string( &ptr, CurrentDirectoryName, ¶ms->CurrentDirectory.DosPath );
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append_unicode_string( &ptr, DllPath, ¶ms->DllPath );
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append_unicode_string( &ptr, ImagePathName, ¶ms->ImagePathName );
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append_unicode_string( &ptr, CommandLine, ¶ms->CommandLine );
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append_unicode_string( &ptr, WindowTitle, ¶ms->WindowTitle );
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append_unicode_string( &ptr, Desktop, ¶ms->Desktop );
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append_unicode_string( &ptr, ShellInfo, ¶ms->ShellInfo );
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append_unicode_string( &ptr, RuntimeInfo, ¶ms->RuntimeInfo );
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*result = RtlDeNormalizeProcessParams( params );
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}
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RtlReleasePebLock();
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return status;
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}
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/******************************************************************************
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* RtlDestroyProcessParameters [NTDLL.@]
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*/
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void WINAPI RtlDestroyProcessParameters( RTL_USER_PROCESS_PARAMETERS *params )
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{
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void *ptr = params;
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SIZE_T size = 0;
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NtFreeVirtualMemory( NtCurrentProcess(), &ptr, &size, MEM_RELEASE );
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}
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