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Sweden-Number/dlls/ntdll/env.c

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/*
* Ntdll environment functions
*
* Copyright 1996, 1998 Alexandre Julliard
* Copyright 2003 Eric Pouech
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "config.h"
#include <assert.h>
#include <stdarg.h>
#include "windef.h"
#include "winbase.h"
#include "winreg.h"
#include "winternl.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(environ);
/******************************************************************************
* RtlCreateEnvironment [NTDLL.@]
*/
NTSTATUS WINAPI RtlCreateEnvironment(BOOLEAN inherit, PWSTR* env)
{
NTSTATUS nts;
TRACE("(%u,%p)!\n", inherit, env);
if (inherit)
{
MEMORY_BASIC_INFORMATION mbi;
RtlAcquirePebLock();
nts = NtQueryVirtualMemory(NtCurrentProcess(),
NtCurrentTeb()->Peb->ProcessParameters->Environment,
0, &mbi, sizeof(mbi), NULL);
if (nts == STATUS_SUCCESS)
{
*env = NULL;
nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)env, 0, &mbi.RegionSize,
MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
if (nts == STATUS_SUCCESS)
memcpy(*env, NtCurrentTeb()->Peb->ProcessParameters->Environment, mbi.RegionSize);
else *env = NULL;
}
RtlReleasePebLock();
}
else
{
ULONG size = 1;
nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)env, 0, &size,
MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
if (nts == STATUS_SUCCESS)
memset(*env, 0, size);
}
return nts;
}
/******************************************************************************
* RtlDestroyEnvironment [NTDLL.@]
*/
NTSTATUS WINAPI RtlDestroyEnvironment(PWSTR env)
{
ULONG size = 0;
TRACE("(%p)!\n", env);
return NtFreeVirtualMemory(NtCurrentProcess(), (void**)&env, &size, MEM_RELEASE);
}
static LPCWSTR ENV_FindVariable(PCWSTR var, PCWSTR name, unsigned namelen)
{
for (; *var; var += strlenW(var) + 1)
{
/* match var names, but avoid setting a var with a name including a '='
* (a starting '=' is valid though)
*/
if (strncmpiW(var, name, namelen) == 0 && var[namelen] == '=' &&
strchrW(var + 1, '=') == var + namelen)
{
return var + namelen + 1;
}
}
return NULL;
}
/******************************************************************
* RtlQueryEnvironmentVariable_U [NTDLL.@]
*
* NOTES: when the buffer is too small, the string is not written, but if the
* terminating null char is the only char that cannot be written, then
* all chars (except the null) are written and success is returned
* (behavior of Win2k at least)
*/
NTSTATUS WINAPI RtlQueryEnvironmentVariable_U(PWSTR env,
PUNICODE_STRING name,
PUNICODE_STRING value)
{
NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
PCWSTR var;
unsigned namelen;
TRACE("%s %s %p\n", debugstr_w(env), debugstr_w(name->Buffer), value);
value->Length = 0;
namelen = name->Length / sizeof(WCHAR);
if (!namelen) return nts;
if (!env)
{
RtlAcquirePebLock();
var = NtCurrentTeb()->Peb->ProcessParameters->Environment;
}
else var = env;
var = ENV_FindVariable(var, name->Buffer, namelen);
if (var != NULL)
{
value->Length = strlenW(var) * sizeof(WCHAR);
if (value->Length <= value->MaximumLength)
{
memmove(value->Buffer, var, min(value->Length + sizeof(WCHAR), value->MaximumLength));
nts = STATUS_SUCCESS;
}
else nts = STATUS_BUFFER_TOO_SMALL;
}
if (!env) RtlReleasePebLock();
return nts;
}
/******************************************************************
* RtlSetCurrentEnvironment [NTDLL.@]
*
*/
void WINAPI RtlSetCurrentEnvironment(PWSTR new_env, PWSTR* old_env)
{
TRACE("(%p %p)\n", new_env, old_env);
RtlAcquirePebLock();
if (old_env) *old_env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
NtCurrentTeb()->Peb->ProcessParameters->Environment = new_env;
RtlReleasePebLock();
}
/******************************************************************************
* RtlSetEnvironmentVariable [NTDLL.@]
*/
NTSTATUS WINAPI RtlSetEnvironmentVariable(PWSTR* penv, PUNICODE_STRING name,
PUNICODE_STRING value)
{
INT len, old_size;
LPWSTR p, env;
NTSTATUS nts = STATUS_VARIABLE_NOT_FOUND;
MEMORY_BASIC_INFORMATION mbi;
TRACE("(%p,%s,%s)\n",
penv, debugstr_w(name->Buffer),
value ? debugstr_w(value->Buffer) : "--nil--");
if (!name || !name->Buffer || !name->Length)
return STATUS_INVALID_PARAMETER_1;
len = name->Length / sizeof(WCHAR);
/* variable names can't contain a '=' except as a first character */
for (p = name->Buffer + 1; p < name->Buffer + len; p++)
if (*p == '=') return STATUS_INVALID_PARAMETER;
if (!penv)
{
RtlAcquirePebLock();
env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
} else env = *penv;
/* compute current size of environment */
for (p = env; *p; p += strlenW(p) + 1);
old_size = p + 1 - env;
/* Find a place to insert the string */
for (p = env; *p; p += strlenW(p) + 1)
{
if (!strncmpiW(name->Buffer, p, len) && (p[len] == '=')) break;
}
if (!value && !*p) goto done; /* Value to remove doesn't exist */
/* Realloc the buffer */
len = value ? len + value->Length / sizeof(WCHAR) + 2 : 0;
if (*p) len -= strlenW(p) + 1; /* The name already exists */
if (len < 0)
{
LPWSTR next = p + strlenW(p) + 1; /* We know there is a next one */
memmove(next + len, next, (old_size - (next - env)) * sizeof(WCHAR));
}
nts = NtQueryVirtualMemory(NtCurrentProcess(), env, 0,
&mbi, sizeof(mbi), NULL);
if (nts != STATUS_SUCCESS) goto done;
if ((old_size + len) * sizeof(WCHAR) > mbi.RegionSize)
{
LPWSTR new_env;
ULONG new_size = (old_size + len) * sizeof(WCHAR);
new_env = NULL;
nts = NtAllocateVirtualMemory(NtCurrentProcess(), (void**)&new_env, 0,
&new_size, MEM_RESERVE | MEM_COMMIT, PAGE_READWRITE);
if (nts != STATUS_SUCCESS) goto done;
memmove(new_env, env, (p - env) * sizeof(WCHAR));
assert(len > 0);
memmove(new_env + (p - env) + len, p, (old_size - (p - env)) * sizeof(WCHAR));
p = new_env + (p - env);
RtlDestroyEnvironment(env);
if (!penv) NtCurrentTeb()->Peb->ProcessParameters->Environment = new_env;
else *penv = new_env;
env = new_env;
}
else
{
if (len > 0) memmove(p + len, p, (old_size - (p - env)) * sizeof(WCHAR));
}
/* Set the new string */
if (value)
{
memcpy( p, name->Buffer, name->Length );
p += name->Length / sizeof(WCHAR);
*p++ = '=';
memcpy( p, value->Buffer, value->Length );
p[value->Length / sizeof(WCHAR)] = 0;
}
done:
if (!penv) RtlReleasePebLock();
return nts;
}
/******************************************************************
* RtlExpandEnvironmentStrings_U (NTDLL.@)
*
*/
NTSTATUS WINAPI RtlExpandEnvironmentStrings_U(PWSTR renv, const UNICODE_STRING* us_src,
PUNICODE_STRING us_dst, PULONG plen)
{
DWORD len, count, total_size = 1; /* 1 for terminating '\0' */
LPCWSTR env, src, p, var;
LPWSTR dst;
src = us_src->Buffer;
count = us_dst->MaximumLength / sizeof(WCHAR);
dst = count ? us_dst->Buffer : NULL;
if (!renv)
{
RtlAcquirePebLock();
env = NtCurrentTeb()->Peb->ProcessParameters->Environment;
}
else env = renv;
while (*src)
{
if (*src != '%')
{
if ((p = strchrW( src, '%' ))) len = p - src;
else len = strlenW(src);
var = src;
src += len;
}
else /* we are at the start of a variable */
{
if ((p = strchrW( src + 1, '%' )))
{
len = p - src - 1; /* Length of the variable name */
if ((var = ENV_FindVariable( env, src + 1, len )))
{
src += len + 2; /* Skip the variable name */
len = strlenW(var);
}
else
{
var = src; /* Copy original name instead */
len += 2;
src += len;
}
}
else /* unfinished variable name, ignore it */
{
var = src;
len = strlenW(src); /* Copy whole string */
src += len;
}
}
total_size += len;
if (dst)
{
if (count < len) len = count;
memcpy(dst, var, len * sizeof(WCHAR));
count -= len;
dst += len;
}
}
if (!renv) RtlReleasePebLock();
/* Null-terminate the string */
if (dst && count) *dst = '\0';
us_dst->Length = (dst) ? (dst - us_dst->Buffer) * sizeof(WCHAR) : 0;
if (plen) *plen = total_size * sizeof(WCHAR);
return (count) ? STATUS_SUCCESS : STATUS_BUFFER_TOO_SMALL;
}
static inline void normalize( void *base, WCHAR **ptr )
{
if (*ptr) *ptr = (WCHAR *)((char *)base + (UINT_PTR)*ptr);
}
/******************************************************************************
* RtlNormalizeProcessParams [NTDLL.@]
*/
PRTL_USER_PROCESS_PARAMETERS WINAPI RtlNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
{
if (params && !(params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
{
normalize( params, &params->CurrentDirectory.DosPath.Buffer );
normalize( params, &params->DllPath.Buffer );
normalize( params, &params->ImagePathName.Buffer );
normalize( params, &params->CommandLine.Buffer );
normalize( params, &params->WindowTitle.Buffer );
normalize( params, &params->Desktop.Buffer );
normalize( params, &params->ShellInfo.Buffer );
normalize( params, &params->RuntimeInfo.Buffer );
params->Flags |= PROCESS_PARAMS_FLAG_NORMALIZED;
}
return params;
}
static inline void denormalize( void *base, WCHAR **ptr )
{
if (*ptr) *ptr = (WCHAR *)(UINT_PTR)((char *)*ptr - (char *)base);
}
/******************************************************************************
* RtlDeNormalizeProcessParams [NTDLL.@]
*/
PRTL_USER_PROCESS_PARAMETERS WINAPI RtlDeNormalizeProcessParams( RTL_USER_PROCESS_PARAMETERS *params )
{
if (params && (params->Flags & PROCESS_PARAMS_FLAG_NORMALIZED))
{
denormalize( params, &params->CurrentDirectory.DosPath.Buffer );
denormalize( params, &params->DllPath.Buffer );
denormalize( params, &params->ImagePathName.Buffer );
denormalize( params, &params->CommandLine.Buffer );
denormalize( params, &params->WindowTitle.Buffer );
denormalize( params, &params->Desktop.Buffer );
denormalize( params, &params->ShellInfo.Buffer );
denormalize( params, &params->RuntimeInfo.Buffer );
params->Flags &= ~PROCESS_PARAMS_FLAG_NORMALIZED;
}
return params;
}
/* append a unicode string to the process params data; helper for RtlCreateProcessParameters */
static void append_unicode_string( void **data, const UNICODE_STRING *src,
UNICODE_STRING *dst )
{
dst->Length = src->Length;
dst->MaximumLength = src->MaximumLength;
dst->Buffer = *data;
memcpy( dst->Buffer, src->Buffer, dst->MaximumLength );
*data = (char *)dst->Buffer + dst->MaximumLength;
}
/******************************************************************************
* RtlCreateProcessParameters [NTDLL.@]
*/
NTSTATUS WINAPI RtlCreateProcessParameters( RTL_USER_PROCESS_PARAMETERS **result,
const UNICODE_STRING *ImagePathName,
const UNICODE_STRING *DllPath,
const UNICODE_STRING *CurrentDirectoryName,
const UNICODE_STRING *CommandLine,
PWSTR Environment,
const UNICODE_STRING *WindowTitle,
const UNICODE_STRING *Desktop,
const UNICODE_STRING *ShellInfo,
const UNICODE_STRING *RuntimeInfo )
{
static const WCHAR empty[] = {0};
static const UNICODE_STRING empty_str = { 0, sizeof(empty), (WCHAR *)empty };
const RTL_USER_PROCESS_PARAMETERS *cur_params;
ULONG size, total_size;
void *ptr;
NTSTATUS status;
RtlAcquirePebLock();
cur_params = NtCurrentTeb()->Peb->ProcessParameters;
if (!DllPath) DllPath = &cur_params->DllPath;
if (!CurrentDirectoryName) CurrentDirectoryName = &cur_params->CurrentDirectory.DosPath;
if (!CommandLine) CommandLine = ImagePathName;
if (!Environment) Environment = cur_params->Environment;
if (!WindowTitle) WindowTitle = &empty_str;
if (!Desktop) Desktop = &empty_str;
if (!ShellInfo) ShellInfo = &empty_str;
if (!RuntimeInfo) RuntimeInfo = &empty_str;
size = (sizeof(RTL_USER_PROCESS_PARAMETERS)
+ ImagePathName->MaximumLength
+ DllPath->MaximumLength
+ CurrentDirectoryName->MaximumLength
+ CommandLine->MaximumLength
+ WindowTitle->MaximumLength
+ Desktop->MaximumLength
+ ShellInfo->MaximumLength
+ RuntimeInfo->MaximumLength);
total_size = size;
if ((status = NtAllocateVirtualMemory( NtCurrentProcess(), &ptr, NULL, &total_size,
MEM_COMMIT, PAGE_READWRITE )) == STATUS_SUCCESS)
{
RTL_USER_PROCESS_PARAMETERS *params = ptr;
params->AllocationSize = total_size;
params->Size = size;
params->Flags = PROCESS_PARAMS_FLAG_NORMALIZED;
params->ConsoleFlags = cur_params->ConsoleFlags;
params->Environment = Environment;
/* all other fields are zero */
ptr = params + 1;
append_unicode_string( &ptr, CurrentDirectoryName, &params->CurrentDirectory.DosPath );
append_unicode_string( &ptr, DllPath, &params->DllPath );
append_unicode_string( &ptr, ImagePathName, &params->ImagePathName );
append_unicode_string( &ptr, CommandLine, &params->CommandLine );
append_unicode_string( &ptr, WindowTitle, &params->WindowTitle );
append_unicode_string( &ptr, Desktop, &params->Desktop );
append_unicode_string( &ptr, ShellInfo, &params->ShellInfo );
append_unicode_string( &ptr, RuntimeInfo, &params->RuntimeInfo );
*result = RtlDeNormalizeProcessParams( params );
}
RtlReleasePebLock();
return status;
}
/******************************************************************************
* RtlDestroyProcessParameters [NTDLL.@]
*/
void WINAPI RtlDestroyProcessParameters( RTL_USER_PROCESS_PARAMETERS *params )
{
void *ptr = params;
ULONG size = 0;
NtFreeVirtualMemory( NtCurrentProcess(), &ptr, &size, MEM_RELEASE );
}
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