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wine/memory/environ.c
Alexandre Julliard 996baf6379 Transmit the Windows PATH to child processes using the WINEPATH 
variable.
2002-10-09 18:35:01 +00:00

830 lines
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/*
* Process environment management
*
* Copyright 1996, 1998 Alexandre Julliard
*
* 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 "wine/port.h"
#include <stdlib.h>
#include <string.h>
#include "windef.h"
#include "winerror.h"
#include "wine/winbase16.h"
#include "wine/server.h"
#include "wine/library.h"
#include "heap.h"
#include "winternl.h"
#include "selectors.h"
/* Win32 process environment database */
typedef struct _ENVDB
{
LPSTR env; /* 00 Process environment strings */
DWORD unknown1; /* 04 Unknown */
LPSTR cmd_line; /* 08 Command line */
LPSTR cur_dir; /* 0c Current directory */
STARTUPINFOA *startup_info; /* 10 Startup information */
HANDLE hStdin; /* 14 Handle for standard input */
HANDLE hStdout; /* 18 Handle for standard output */
HANDLE hStderr; /* 1c Handle for standard error */
DWORD unknown2; /* 20 Unknown */
DWORD inherit_console; /* 24 Inherit console flag */
DWORD break_type; /* 28 Console events flag */
void *break_sem; /* 2c SetConsoleCtrlHandler semaphore */
void *break_event; /* 30 SetConsoleCtrlHandler event */
void *break_thread; /* 34 SetConsoleCtrlHandler thread */
void *break_handlers; /* 38 List of console handlers */
} ENVDB;
/* Format of an environment block:
* ASCIIZ string 1 (xx=yy format)
* ...
* ASCIIZ string n
* BYTE 0
* WORD 1
* ASCIIZ program name (e.g. C:\WINDOWS\SYSTEM\KRNL386.EXE)
*
* Notes:
* - contrary to Microsoft docs, the environment strings do not appear
* to be sorted on Win95 (although they are on NT); so we don't bother
* to sort them either.
*/
static const char ENV_program_name[] = "C:\\WINDOWS\\SYSTEM\\KRNL386.EXE";
/* Maximum length of a Win16 environment string (including NULL) */
#define MAX_WIN16_LEN 128
STARTUPINFOA current_startupinfo =
{
sizeof(STARTUPINFOA), /* cb */
0, /* lpReserved */
0, /* lpDesktop */
0, /* lpTitle */
0, /* dwX */
0, /* dwY */
0, /* dwXSize */
0, /* dwYSize */
0, /* dwXCountChars */
0, /* dwYCountChars */
0, /* dwFillAttribute */
0, /* dwFlags */
0, /* wShowWindow */
0, /* cbReserved2 */
0, /* lpReserved2 */
0, /* hStdInput */
0, /* hStdOutput */
0 /* hStdError */
};
ENVDB current_envdb =
{
0, /* environ */
0, /* unknown1 */
0, /* cmd_line */
0, /* cur_dir */
&current_startupinfo, /* startup_info */
0, /* hStdin */
0, /* hStdout */
0, /* hStderr */
0, /* unknown2 */
0, /* inherit_console */
0, /* break_type */
0, /* break_sem */
0, /* break_event */
0, /* break_thread */
0 /* break_handlers */
};
static WCHAR *cmdlineW; /* Unicode command line */
static WORD env_sel; /* selector to the environment */
/***********************************************************************
* ENV_FindVariable
*
* Find a variable in the environment and return a pointer to the value.
* Helper function for GetEnvironmentVariable and ExpandEnvironmentStrings.
*/
static LPCSTR ENV_FindVariable( LPCSTR env, LPCSTR name, INT len )
{
while (*env)
{
if (!strncasecmp( name, env, len ) && (env[len] == '='))
return env + len + 1;
env += strlen(env) + 1;
}
return NULL;
}
/***********************************************************************
* build_environment
*
* Build the environment for the initial process
*/
static BOOL build_environment(void)
{
extern char **environ;
static const WORD one = 1;
LPSTR p, *e;
int size;
/* Compute the total size of the Unix environment */
size = sizeof(BYTE) + sizeof(WORD) + sizeof(ENV_program_name);
for (e = environ; *e; e++)
{
if (!memcmp( *e, "PATH=", 5 )) continue;
size += strlen(*e) + 1;
}
/* Now allocate the environment */
if (!(p = HeapAlloc( GetProcessHeap(), 0, size ))) return FALSE;
current_envdb.env = p;
env_sel = SELECTOR_AllocBlock( p, 0x10000, WINE_LDT_FLAGS_DATA );
/* And fill it with the Unix environment */
for (e = environ; *e; e++)
{
/* skip Unix PATH and store WINEPATH as PATH */
if (!memcmp( *e, "PATH=", 5 )) continue;
if (!memcmp( *e, "WINEPATH=", 9 )) strcpy( p, *e + 4 );
else strcpy( p, *e );
p += strlen(p) + 1;
}
/* Now add the program name */
*p++ = 0;
memcpy( p, &one, sizeof(WORD) );
strcpy( p + sizeof(WORD), ENV_program_name );
return TRUE;
}
/***********************************************************************
* copy_str
*
* Small helper for ENV_InitStartupInfo.
*/
inline static char *copy_str( char **dst, const char **src, size_t len )
{
char *ret;
if (!len) return NULL;
ret = *dst;
memcpy( ret, *src, len );
ret[len] = 0;
*dst += len + 1;
*src += len;
return ret;
}
/***********************************************************************
* ENV_InitStartupInfo
*
* Fill the startup info structure from the server.
*/
ENVDB *ENV_InitStartupInfo( size_t info_size, char *main_exe_name, size_t main_exe_size )
{
startup_info_t info;
void *data;
char *dst;
const char *src;
size_t len;
if (!build_environment()) return NULL;
if (!info_size) return &current_envdb; /* nothing to retrieve */
if (!(data = HeapAlloc( GetProcessHeap(), 0, info_size ))) return NULL;
SERVER_START_REQ( get_startup_info )
{
wine_server_set_reply( req, data, info_size );
wine_server_call( req );
info_size = wine_server_reply_size( reply );
}
SERVER_END_REQ;
if (info_size < sizeof(info.size)) goto done;
len = min( info_size, ((startup_info_t *)data)->size );
memset( &info, 0, sizeof(info) );
memcpy( &info, data, len );
src = (char *)data + len;
info_size -= len;
/* fixup the lengths */
if (info.filename_len > info_size) info.filename_len = info_size;
info_size -= info.filename_len;
if (info.cmdline_len > info_size) info.cmdline_len = info_size;
info_size -= info.cmdline_len;
if (info.desktop_len > info_size) info.desktop_len = info_size;
info_size -= info.desktop_len;
if (info.title_len > info_size) info.title_len = info_size;
/* store the filename */
if (info.filename_len)
{
len = min( info.filename_len, main_exe_size-1 );
memcpy( main_exe_name, src, len );
main_exe_name[len] = 0;
src += info.filename_len;
}
/* copy the other strings */
len = info.cmdline_len + info.desktop_len + info.title_len;
if (len && (dst = HeapAlloc( GetProcessHeap(), 0, len + 3 )))
{
current_envdb.cmd_line = copy_str( &dst, &src, info.cmdline_len );
current_startupinfo.lpDesktop = copy_str( &dst, &src, info.desktop_len );
current_startupinfo.lpTitle = copy_str( &dst, &src, info.title_len );
}
current_startupinfo.dwX = info.x;
current_startupinfo.dwY = info.y;
current_startupinfo.dwXSize = info.cx;
current_startupinfo.dwYSize = info.cy;
current_startupinfo.dwXCountChars = info.x_chars;
current_startupinfo.dwYCountChars = info.y_chars;
current_startupinfo.dwFillAttribute = info.attribute;
current_startupinfo.wShowWindow = info.cmd_show;
current_startupinfo.dwFlags = info.flags;
done:
HeapFree( GetProcessHeap(), 0, data );
return &current_envdb;
}
/***********************************************************************
* set_library_argv
*
* Set the Wine library argc/argv global variables.
*/
static void set_library_argv( char **argv )
{
int argc;
WCHAR *p;
WCHAR **wargv;
DWORD total = 0;
for (argc = 0; argv[argc]; argc++)
total += MultiByteToWideChar( CP_ACP, 0, argv[argc], -1, NULL, 0 );
wargv = HeapAlloc( GetProcessHeap(), 0,
total * sizeof(WCHAR) + (argc + 1) * sizeof(*wargv) );
p = (WCHAR *)(wargv + argc + 1);
for (argc = 0; argv[argc]; argc++)
{
DWORD len = MultiByteToWideChar( CP_ACP, 0, argv[argc], -1, p, total );
wargv[argc] = p;
p += len;
total -= len;
}
wargv[argc] = NULL;
__wine_main_argc = argc;
__wine_main_argv = argv;
__wine_main_wargv = wargv;
}
/***********************************************************************
* ENV_BuildCommandLine
*
* Build the command line of a process from the argv array.
*
* Note that it does NOT necessarily include the file name.
* Sometimes we don't even have any command line options at all.
*
* We must quote and escape characters so that the argv array can be rebuilt
* from the command line:
* - spaces and tabs must be quoted
* 'a b' -> '"a b"'
* - quotes must be escaped
* '"' -> '\"'
* - if '\'s are followed by a '"', they must be doubled and followed by '\"',
* resulting in an odd number of '\' followed by a '"'
* '\"' -> '\\\"'
* '\\"' -> '\\\\\"'
* - '\'s that are not followed by a '"' can be left as is
* 'a\b' == 'a\b'
* 'a\\b' == 'a\\b'
*/
BOOL ENV_BuildCommandLine( char **argv )
{
int len;
char *p, **arg;
set_library_argv( argv );
if (current_envdb.cmd_line) goto done; /* already got it from the server */
len = 0;
for (arg = argv; *arg; arg++)
{
int has_space,bcount;
char* a;
has_space=0;
bcount=0;
a=*arg;
while (*a!='\0') {
if (*a=='\\') {
bcount++;
} else {
if (*a==' ' || *a=='\t') {
has_space=1;
} else if (*a=='"') {
/* doubling of '\' preceeding a '"',
* plus escaping of said '"'
*/
len+=2*bcount+1;
}
bcount=0;
}
a++;
}
len+=(a-*arg)+1 /* for the separating space */;
if (has_space)
len+=2; /* for the quotes */
}
if (!(current_envdb.cmd_line = HeapAlloc( GetProcessHeap(), 0, len )))
return FALSE;
p = current_envdb.cmd_line;
for (arg = argv; *arg; arg++)
{
int has_space,has_quote;
char* a;
/* Check for quotes and spaces in this argument */
has_space=has_quote=0;
a=*arg;
while (*a!='\0') {
if (*a==' ' || *a=='\t') {
has_space=1;
if (has_quote)
break;
} else if (*a=='"') {
has_quote=1;
if (has_space)
break;
}
a++;
}
/* Now transfer it to the command line */
if (has_space)
*p++='"';
if (has_quote) {
int bcount;
char* a;
bcount=0;
a=*arg;
while (*a!='\0') {
if (*a=='\\') {
*p++=*a;
bcount++;
} else {
if (*a=='"') {
int i;
/* Double all the '\\' preceeding this '"', plus one */
for (i=0;i<=bcount;i++)
*p++='\\';
*p++='"';
} else {
*p++=*a;
}
bcount=0;
}
a++;
}
} else {
strcpy(p,*arg);
p+=strlen(*arg);
}
if (has_space)
*p++='"';
*p++=' ';
}
if (p > current_envdb.cmd_line)
p--; /* remove last space */
*p = '\0';
/* now allocate the Unicode version */
done:
len = MultiByteToWideChar( CP_ACP, 0, current_envdb.cmd_line, -1, NULL, 0 );
if (!(cmdlineW = HeapAlloc( GetProcessHeap(), 0, len * sizeof(WCHAR) )))
return FALSE;
MultiByteToWideChar( CP_ACP, 0, current_envdb.cmd_line, -1, cmdlineW, len );
return TRUE;
}
/***********************************************************************
* GetCommandLineA (KERNEL32.@)
*
* WARNING: there's a Windows incompatibility lurking here !
* Win32s always includes the full path of the program file,
* whereas Windows NT only returns the full file path plus arguments
* in case the program has been started with a full path.
* Win9x seems to have inherited NT behaviour.
*
* Note that both Start Menu Execute and Explorer start programs with
* fully specified quoted app file paths, which is why probably the only case
* where you'll see single file names is in case of direct launch
* via CreateProcess or WinExec.
*
* Perhaps we should take care of Win3.1 programs here (Win32s "feature").
*
* References: MS KB article q102762.txt (special Win32s handling)
*/
LPSTR WINAPI GetCommandLineA(void)
{
return current_envdb.cmd_line;
}
/***********************************************************************
* GetCommandLineW (KERNEL32.@)
*/
LPWSTR WINAPI GetCommandLineW(void)
{
return cmdlineW;
}
/***********************************************************************
* GetEnvironmentStrings (KERNEL32.@)
* GetEnvironmentStringsA (KERNEL32.@)
*/
LPSTR WINAPI GetEnvironmentStringsA(void)
{
return current_envdb.env;
}
/***********************************************************************
* GetEnvironmentStringsW (KERNEL32.@)
*/
LPWSTR WINAPI GetEnvironmentStringsW(void)
{
INT size;
LPWSTR ret;
RtlAcquirePebLock();
size = HeapSize( GetProcessHeap(), 0, current_envdb.env );
if ((ret = HeapAlloc( GetProcessHeap(), 0, size * sizeof(WCHAR) )) != NULL)
{
LPSTR pA = current_envdb.env;
LPWSTR pW = ret;
while (size--) *pW++ = (WCHAR)(BYTE)*pA++;
}
RtlReleasePebLock();
return ret;
}
/***********************************************************************
* FreeEnvironmentStringsA (KERNEL32.@)
*/
BOOL WINAPI FreeEnvironmentStringsA( LPSTR ptr )
{
if (ptr != current_envdb.env)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
return TRUE;
}
/***********************************************************************
* FreeEnvironmentStringsW (KERNEL32.@)
*/
BOOL WINAPI FreeEnvironmentStringsW( LPWSTR ptr )
{
return HeapFree( GetProcessHeap(), 0, ptr );
}
/***********************************************************************
* GetEnvironmentVariableA (KERNEL32.@)
*/
DWORD WINAPI GetEnvironmentVariableA( LPCSTR name, LPSTR value, DWORD size )
{
LPCSTR p;
INT ret = 0;
if (!name || !*name)
{
SetLastError( ERROR_ENVVAR_NOT_FOUND );
return 0;
}
RtlAcquirePebLock();
if ((p = ENV_FindVariable( current_envdb.env, name, strlen(name) )))
{
ret = strlen(p);
if (size <= ret)
{
/* If not enough room, include the terminating null
* in the returned size */
ret++;
}
else if (value) strcpy( value, p );
}
RtlReleasePebLock();
if (!ret)
SetLastError( ERROR_ENVVAR_NOT_FOUND );
return ret;
}
/***********************************************************************
* GetEnvironmentVariableW (KERNEL32.@)
*/
DWORD WINAPI GetEnvironmentVariableW( LPCWSTR nameW, LPWSTR valW, DWORD size)
{
LPSTR name, val;
DWORD ret;
if (!nameW || !*nameW)
{
SetLastError( ERROR_ENVVAR_NOT_FOUND );
return 0;
}
name = HEAP_strdupWtoA( GetProcessHeap(), 0, nameW );
val = valW ? HeapAlloc( GetProcessHeap(), 0, size ) : NULL;
ret = GetEnvironmentVariableA( name, val, size );
if (ret && val)
{
if (size && !MultiByteToWideChar( CP_ACP, 0, val, -1, valW, size ))
valW[size-1] = 0;
}
HeapFree( GetProcessHeap(), 0, name );
if (val) HeapFree( GetProcessHeap(), 0, val );
return ret;
}
/***********************************************************************
* SetEnvironmentVariableA (KERNEL32.@)
*/
BOOL WINAPI SetEnvironmentVariableA( LPCSTR name, LPCSTR value )
{
INT old_size, len, res;
LPSTR p, env, new_env;
BOOL ret = FALSE;
if (!name || !*name)
{
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
RtlAcquirePebLock();
env = p = current_envdb.env;
/* Find a place to insert the string */
res = -1;
len = strlen(name);
while (*p)
{
if (!strncasecmp( name, p, len ) && (p[len] == '=')) break;
p += strlen(p) + 1;
}
if (!value && !*p) goto done; /* Value to remove doesn't exist */
/* Realloc the buffer */
len = value ? strlen(name) + strlen(value) + 2 : 0;
if (*p) len -= strlen(p) + 1; /* The name already exists */
old_size = HeapSize( GetProcessHeap(), 0, env );
if (len < 0)
{
LPSTR next = p + strlen(p) + 1; /* We know there is a next one */
memmove( next + len, next, old_size - (next - env) );
}
if (!(new_env = HeapReAlloc( GetProcessHeap(), 0, env, old_size + len )))
goto done;
if (env_sel) env_sel = SELECTOR_ReallocBlock( env_sel, new_env, old_size + len );
p = new_env + (p - env);
if (len > 0) memmove( p + len, p, old_size - (p - new_env) );
/* Set the new string */
if (value)
{
strcpy( p, name );
strcat( p, "=" );
strcat( p, value );
}
current_envdb.env = new_env;
ret = TRUE;
done:
RtlReleasePebLock();
return ret;
}
/***********************************************************************
* SetEnvironmentVariableW (KERNEL32.@)
*/
BOOL WINAPI SetEnvironmentVariableW( LPCWSTR name, LPCWSTR value )
{
LPSTR nameA = HEAP_strdupWtoA( GetProcessHeap(), 0, name );
LPSTR valueA = HEAP_strdupWtoA( GetProcessHeap(), 0, value );
BOOL ret = SetEnvironmentVariableA( nameA, valueA );
HeapFree( GetProcessHeap(), 0, nameA );
HeapFree( GetProcessHeap(), 0, valueA );
return ret;
}
/***********************************************************************
* ExpandEnvironmentStringsA (KERNEL32.@)
*
* Note: overlapping buffers are not supported; this is how it should be.
*/
DWORD WINAPI ExpandEnvironmentStringsA( LPCSTR src, LPSTR dst, DWORD count )
{
DWORD len, total_size = 1; /* 1 for terminating '\0' */
LPCSTR p, var;
if (!count) dst = NULL;
RtlAcquirePebLock();
while (*src)
{
if (*src != '%')
{
if ((p = strchr( src, '%' ))) len = p - src;
else len = strlen(src);
var = src;
src += len;
}
else /* we are at the start of a variable */
{
if ((p = strchr( src + 1, '%' )))
{
len = p - src - 1; /* Length of the variable name */
if ((var = ENV_FindVariable( current_envdb.env, src + 1, len )))
{
src += len + 2; /* Skip the variable name */
len = strlen(var);
}
else
{
var = src; /* Copy original name instead */
len += 2;
src += len;
}
}
else /* unfinished variable name, ignore it */
{
var = src;
len = strlen(src); /* Copy whole string */
src += len;
}
}
total_size += len;
if (dst)
{
if (count < len) len = count;
memcpy( dst, var, len );
dst += len;
count -= len;
}
}
RtlReleasePebLock();
/* Null-terminate the string */
if (dst)
{
if (!count) dst--;
*dst = '\0';
}
return total_size;
}
/***********************************************************************
* ExpandEnvironmentStringsW (KERNEL32.@)
*/
DWORD WINAPI ExpandEnvironmentStringsW( LPCWSTR src, LPWSTR dst, DWORD len )
{
LPSTR srcA = HEAP_strdupWtoA( GetProcessHeap(), 0, src );
LPSTR dstA = dst ? HeapAlloc( GetProcessHeap(), 0, len ) : NULL;
DWORD ret = ExpandEnvironmentStringsA( srcA, dstA, len );
if (dstA)
{
ret = MultiByteToWideChar( CP_ACP, 0, dstA, -1, dst, len );
HeapFree( GetProcessHeap(), 0, dstA );
}
HeapFree( GetProcessHeap(), 0, srcA );
return ret;
}
/***********************************************************************
* GetDOSEnvironment (KERNEL.131)
*/
SEGPTR WINAPI GetDOSEnvironment16(void)
{
return MAKESEGPTR( env_sel, 0 );
}
/***********************************************************************
* GetStdHandle (KERNEL32.@)
*/
HANDLE WINAPI GetStdHandle( DWORD std_handle )
{
switch(std_handle)
{
case STD_INPUT_HANDLE: return current_envdb.hStdin;
case STD_OUTPUT_HANDLE: return current_envdb.hStdout;
case STD_ERROR_HANDLE: return current_envdb.hStderr;
}
SetLastError( ERROR_INVALID_PARAMETER );
return INVALID_HANDLE_VALUE;
}
/***********************************************************************
* SetStdHandle (KERNEL32.@)
*/
BOOL WINAPI SetStdHandle( DWORD std_handle, HANDLE handle )
{
switch(std_handle)
{
case STD_INPUT_HANDLE: current_envdb.hStdin = handle; return TRUE;
case STD_OUTPUT_HANDLE: current_envdb.hStdout = handle; return TRUE;
case STD_ERROR_HANDLE: current_envdb.hStderr = handle; return TRUE;
}
SetLastError( ERROR_INVALID_PARAMETER );
return FALSE;
}
/***********************************************************************
* GetStartupInfoA (KERNEL32.@)
*/
VOID WINAPI GetStartupInfoA( LPSTARTUPINFOA info )
{
*info = current_startupinfo;
}
/***********************************************************************
* GetStartupInfoW (KERNEL32.@)
*/
VOID WINAPI GetStartupInfoW( LPSTARTUPINFOW info )
{
info->cb = sizeof(STARTUPINFOW);
info->dwX = current_startupinfo.dwX;
info->dwY = current_startupinfo.dwY;
info->dwXSize = current_startupinfo.dwXSize;
info->dwXCountChars = current_startupinfo.dwXCountChars;
info->dwYCountChars = current_startupinfo.dwYCountChars;
info->dwFillAttribute = current_startupinfo.dwFillAttribute;
info->dwFlags = current_startupinfo.dwFlags;
info->wShowWindow = current_startupinfo.wShowWindow;
info->cbReserved2 = current_startupinfo.cbReserved2;
info->lpReserved2 = current_startupinfo.lpReserved2;
info->hStdInput = current_startupinfo.hStdInput;
info->hStdOutput = current_startupinfo.hStdOutput;
info->hStdError = current_startupinfo.hStdError;
info->lpReserved = HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo.lpReserved );
info->lpDesktop = HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo.lpDesktop );
info->lpTitle = HEAP_strdupAtoW (GetProcessHeap(), 0, current_startupinfo.lpTitle );
}
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