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wine/dlls/ntdll/path.c
Alexandre Julliard 6be25f8cb1 ntdll: Simplify the RtlIsDosDeviceName_U implementation.
2008-10-29 15:21:51 +01:00

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/*
* Ntdll path functions
*
* Copyright 2002, 2003, 2004 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <stdarg.h>
#include <sys/types.h>
#include <errno.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include "ntstatus.h"
#define WIN32_NO_STATUS
#include "windef.h"
#include "winioctl.h"
#include "wine/unicode.h"
#include "wine/debug.h"
#include "wine/library.h"
#include "ntdll_misc.h"
WINE_DEFAULT_DEBUG_CHANNEL(file);
static const WCHAR DeviceRootW[] = {'\\','\\','.','\\',0};
static const WCHAR NTDosPrefixW[] = {'\\','?','?','\\',0};
static const WCHAR UncPfxW[] = {'U','N','C','\\',0};
#define IS_SEPARATOR(ch) ((ch) == '\\' || (ch) == '/')
/***********************************************************************
* remove_last_componentA
*
* Remove the last component of the path. Helper for find_drive_rootA.
*/
static inline unsigned int remove_last_componentA( const char *path, unsigned int len )
{
int level = 0;
while (level < 1)
{
/* find start of the last path component */
unsigned int prev = len;
if (prev <= 1) break; /* reached root */
while (prev > 1 && path[prev - 1] != '/') prev--;
/* does removing it take us up a level? */
if (len - prev != 1 || path[prev] != '.') /* not '.' */
{
if (len - prev == 2 && path[prev] == '.' && path[prev+1] == '.') /* is it '..'? */
level--;
else
level++;
}
/* strip off trailing slashes */
while (prev > 1 && path[prev - 1] == '/') prev--;
len = prev;
}
return len;
}
/***********************************************************************
* find_drive_rootA
*
* Find a drive for which the root matches the beginning of the given path.
* This can be used to translate a Unix path into a drive + DOS path.
* Return value is the drive, or -1 on error. On success, ppath is modified
* to point to the beginning of the DOS path.
*/
static NTSTATUS find_drive_rootA( LPCSTR *ppath, unsigned int len, int *drive_ret )
{
/* Starting with the full path, check if the device and inode match any of
* the wine 'drives'. If not then remove the last path component and try
* again. If the last component was a '..' then skip a normal component
* since it's a directory that's ascended back out of.
*/
int drive;
char *buffer;
const char *path = *ppath;
struct stat st;
struct drive_info info[MAX_DOS_DRIVES];
/* get device and inode of all drives */
if (!DIR_get_drives_info( info )) return STATUS_OBJECT_PATH_NOT_FOUND;
/* strip off trailing slashes */
while (len > 1 && path[len - 1] == '/') len--;
/* make a copy of the path */
if (!(buffer = RtlAllocateHeap( GetProcessHeap(), 0, len + 1 ))) return STATUS_NO_MEMORY;
memcpy( buffer, path, len );
buffer[len] = 0;
for (;;)
{
if (!stat( buffer, &st ) && S_ISDIR( st.st_mode ))
{
/* Find the drive */
for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
{
if ((info[drive].dev == st.st_dev) && (info[drive].ino == st.st_ino))
{
if (len == 1) len = 0; /* preserve root slash in returned path */
TRACE( "%s -> drive %c:, root=%s, name=%s\n",
debugstr_a(path), 'A' + drive, debugstr_a(buffer), debugstr_a(path + len));
*ppath += len;
*drive_ret = drive;
RtlFreeHeap( GetProcessHeap(), 0, buffer );
return STATUS_SUCCESS;
}
}
}
if (len <= 1) break; /* reached root */
len = remove_last_componentA( buffer, len );
buffer[len] = 0;
}
RtlFreeHeap( GetProcessHeap(), 0, buffer );
return STATUS_OBJECT_PATH_NOT_FOUND;
}
/***********************************************************************
* remove_last_componentW
*
* Remove the last component of the path. Helper for find_drive_rootW.
*/
static inline int remove_last_componentW( const WCHAR *path, int len )
{
int level = 0;
while (level < 1)
{
/* find start of the last path component */
int prev = len;
if (prev <= 1) break; /* reached root */
while (prev > 1 && !IS_SEPARATOR(path[prev - 1])) prev--;
/* does removing it take us up a level? */
if (len - prev != 1 || path[prev] != '.') /* not '.' */
{
if (len - prev == 2 && path[prev] == '.' && path[prev+1] == '.') /* is it '..'? */
level--;
else
level++;
}
/* strip off trailing slashes */
while (prev > 1 && IS_SEPARATOR(path[prev - 1])) prev--;
len = prev;
}
return len;
}
/***********************************************************************
* find_drive_rootW
*
* Find a drive for which the root matches the beginning of the given path.
* This can be used to translate a Unix path into a drive + DOS path.
* Return value is the drive, or -1 on error. On success, ppath is modified
* to point to the beginning of the DOS path.
*/
static int find_drive_rootW( LPCWSTR *ppath )
{
/* Starting with the full path, check if the device and inode match any of
* the wine 'drives'. If not then remove the last path component and try
* again. If the last component was a '..' then skip a normal component
* since it's a directory that's ascended back out of.
*/
int drive, lenA, lenW;
char *buffer, *p;
const WCHAR *path = *ppath;
struct stat st;
struct drive_info info[MAX_DOS_DRIVES];
/* get device and inode of all drives */
if (!DIR_get_drives_info( info )) return -1;
/* strip off trailing slashes */
lenW = strlenW(path);
while (lenW > 1 && IS_SEPARATOR(path[lenW - 1])) lenW--;
/* convert path to Unix encoding */
lenA = ntdll_wcstoumbs( 0, path, lenW, NULL, 0, NULL, NULL );
if (!(buffer = RtlAllocateHeap( GetProcessHeap(), 0, lenA + 1 ))) return -1;
lenA = ntdll_wcstoumbs( 0, path, lenW, buffer, lenA, NULL, NULL );
buffer[lenA] = 0;
for (p = buffer; *p; p++) if (*p == '\\') *p = '/';
for (;;)
{
if (!stat( buffer, &st ) && S_ISDIR( st.st_mode ))
{
/* Find the drive */
for (drive = 0; drive < MAX_DOS_DRIVES; drive++)
{
if ((info[drive].dev == st.st_dev) && (info[drive].ino == st.st_ino))
{
if (lenW == 1) lenW = 0; /* preserve root slash in returned path */
TRACE( "%s -> drive %c:, root=%s, name=%s\n",
debugstr_w(path), 'A' + drive, debugstr_a(buffer), debugstr_w(path + lenW));
*ppath += lenW;
RtlFreeHeap( GetProcessHeap(), 0, buffer );
return drive;
}
}
}
if (lenW <= 1) break; /* reached root */
lenW = remove_last_componentW( path, lenW );
/* we only need the new length, buffer already contains the converted string */
lenA = ntdll_wcstoumbs( 0, path, lenW, NULL, 0, NULL, NULL );
buffer[lenA] = 0;
}
RtlFreeHeap( GetProcessHeap(), 0, buffer );
return -1;
}
/***********************************************************************
* RtlDetermineDosPathNameType_U (NTDLL.@)
*/
DOS_PATHNAME_TYPE WINAPI RtlDetermineDosPathNameType_U( PCWSTR path )
{
if (IS_SEPARATOR(path[0]))
{
if (!IS_SEPARATOR(path[1])) return ABSOLUTE_PATH; /* "/foo" */
if (path[2] != '.') return UNC_PATH; /* "//foo" */
if (IS_SEPARATOR(path[3])) return DEVICE_PATH; /* "//./foo" */
if (path[3]) return UNC_PATH; /* "//.foo" */
return UNC_DOT_PATH; /* "//." */
}
else
{
if (!path[0] || path[1] != ':') return RELATIVE_PATH; /* "foo" */
if (IS_SEPARATOR(path[2])) return ABSOLUTE_DRIVE_PATH; /* "c:/foo" */
return RELATIVE_DRIVE_PATH; /* "c:foo" */
}
}
/***********************************************************************
* RtlIsDosDeviceName_U (NTDLL.@)
*
* Check if the given DOS path contains a DOS device name.
*
* Returns the length of the device name in the low word and its
* position in the high word (both in bytes, not WCHARs), or 0 if no
* device name is found.
*/
ULONG WINAPI RtlIsDosDeviceName_U( PCWSTR dos_name )
{
static const WCHAR consoleW[] = {'\\','\\','.','\\','C','O','N',0};
static const WCHAR auxW[3] = {'A','U','X'};
static const WCHAR comW[3] = {'C','O','M'};
static const WCHAR conW[3] = {'C','O','N'};
static const WCHAR lptW[3] = {'L','P','T'};
static const WCHAR nulW[3] = {'N','U','L'};
static const WCHAR prnW[3] = {'P','R','N'};
const WCHAR *start, *end, *p;
switch(RtlDetermineDosPathNameType_U( dos_name ))
{
case INVALID_PATH:
case UNC_PATH:
return 0;
case DEVICE_PATH:
if (!strcmpiW( dos_name, consoleW ))
return MAKELONG( sizeof(conW), 4 * sizeof(WCHAR) ); /* 4 is length of \\.\ prefix */
return 0;
case ABSOLUTE_DRIVE_PATH:
case RELATIVE_DRIVE_PATH:
start = dos_name + 2; /* skip drive letter */
break;
default:
start = dos_name;
break;
}
/* find start of file name */
for (p = start; *p; p++) if (IS_SEPARATOR(*p)) start = p + 1;
/* truncate at extension and ':' */
for (end = start; *end; end++) if (*end == '.' || *end == ':') break;
end--;
/* remove trailing spaces */
while (end >= start && *end == ' ') end--;
/* now we have a potential device name between start and end, check it */
switch(end - start + 1)
{
case 3:
if (strncmpiW( start, auxW, 3 ) &&
strncmpiW( start, conW, 3 ) &&
strncmpiW( start, nulW, 3 ) &&
strncmpiW( start, prnW, 3 )) break;
return MAKELONG( 3 * sizeof(WCHAR), (start - dos_name) * sizeof(WCHAR) );
case 4:
if (strncmpiW( start, comW, 3 ) && strncmpiW( start, lptW, 3 )) break;
if (*end <= '0' || *end > '9') break;
return MAKELONG( 4 * sizeof(WCHAR), (start - dos_name) * sizeof(WCHAR) );
default: /* can't match anything */
break;
}
return 0;
}
/**************************************************************************
* RtlDosPathNameToNtPathName_U [NTDLL.@]
*
* dos_path: a DOS path name (fully qualified or not)
* ntpath: pointer to a UNICODE_STRING to hold the converted
* path name
* file_part:will point (in ntpath) to the file part in the path
* cd: directory reference (optional)
*
* FIXME:
* + fill the cd structure
*/
BOOLEAN WINAPI RtlDosPathNameToNtPathName_U(PCWSTR dos_path,
PUNICODE_STRING ntpath,
PWSTR* file_part,
CURDIR* cd)
{
static const WCHAR LongFileNamePfxW[4] = {'\\','\\','?','\\'};
ULONG sz, offset;
WCHAR local[MAX_PATH];
LPWSTR ptr;
TRACE("(%s,%p,%p,%p)\n",
debugstr_w(dos_path), ntpath, file_part, cd);
if (cd)
{
FIXME("Unsupported parameter\n");
memset(cd, 0, sizeof(*cd));
}
if (!dos_path || !*dos_path) return FALSE;
if (!strncmpW(dos_path, LongFileNamePfxW, 4))
{
ntpath->Length = strlenW(dos_path) * sizeof(WCHAR);
ntpath->MaximumLength = ntpath->Length + sizeof(WCHAR);
ntpath->Buffer = RtlAllocateHeap(GetProcessHeap(), 0, ntpath->MaximumLength);
if (!ntpath->Buffer) return FALSE;
memcpy( ntpath->Buffer, dos_path, ntpath->MaximumLength );
ntpath->Buffer[1] = '?'; /* change \\?\ to \??\ */
if (file_part)
{
if ((ptr = strrchrW( ntpath->Buffer, '\\' )) && ptr[1]) *file_part = ptr + 1;
else *file_part = NULL;
}
return TRUE;
}
ptr = local;
sz = RtlGetFullPathName_U(dos_path, sizeof(local), ptr, file_part);
if (sz == 0) return FALSE;
if (sz > sizeof(local))
{
if (!(ptr = RtlAllocateHeap(GetProcessHeap(), 0, sz))) return FALSE;
sz = RtlGetFullPathName_U(dos_path, sz, ptr, file_part);
}
ntpath->MaximumLength = sz + (4 /* unc\ */ + 4 /* \??\ */) * sizeof(WCHAR);
ntpath->Buffer = RtlAllocateHeap(GetProcessHeap(), 0, ntpath->MaximumLength);
if (!ntpath->Buffer)
{
if (ptr != local) RtlFreeHeap(GetProcessHeap(), 0, ptr);
return FALSE;
}
strcpyW(ntpath->Buffer, NTDosPrefixW);
switch (RtlDetermineDosPathNameType_U(ptr))
{
case UNC_PATH: /* \\foo */
offset = 2;
strcatW(ntpath->Buffer, UncPfxW);
break;
case DEVICE_PATH: /* \\.\foo */
offset = 4;
break;
default:
offset = 0;
break;
}
strcatW(ntpath->Buffer, ptr + offset);
ntpath->Length = strlenW(ntpath->Buffer) * sizeof(WCHAR);
if (file_part && *file_part)
*file_part = ntpath->Buffer + ntpath->Length / sizeof(WCHAR) - strlenW(*file_part);
/* FIXME: cd filling */
if (ptr != local) RtlFreeHeap(GetProcessHeap(), 0, ptr);
return TRUE;
}
/******************************************************************
* RtlDosSearchPath_U
*
* Searches a file of name 'name' into a ';' separated list of paths
* (stored in paths)
* Doesn't seem to search elsewhere than the paths list
* Stores the result in buffer (file_part will point to the position
* of the file name in the buffer)
* FIXME:
* - how long shall the paths be ??? (MAX_PATH or larger with \\?\ constructs ???)
*/
ULONG WINAPI RtlDosSearchPath_U(LPCWSTR paths, LPCWSTR search, LPCWSTR ext,
ULONG buffer_size, LPWSTR buffer,
LPWSTR* file_part)
{
DOS_PATHNAME_TYPE type = RtlDetermineDosPathNameType_U(search);
ULONG len = 0;
if (type == RELATIVE_PATH)
{
ULONG allocated = 0, needed, filelen;
WCHAR *name = NULL;
filelen = 1 /* for \ */ + strlenW(search) + 1 /* \0 */;
/* Windows only checks for '.' without worrying about path components */
if (strchrW( search, '.' )) ext = NULL;
if (ext != NULL) filelen += strlenW(ext);
while (*paths)
{
LPCWSTR ptr;
for (needed = 0, ptr = paths; *ptr != 0 && *ptr++ != ';'; needed++);
if (needed + filelen > allocated)
{
if (!name) name = RtlAllocateHeap(GetProcessHeap(), 0,
(needed + filelen) * sizeof(WCHAR));
else
{
WCHAR *newname = RtlReAllocateHeap(GetProcessHeap(), 0, name,
(needed + filelen) * sizeof(WCHAR));
if (!newname) RtlFreeHeap(GetProcessHeap(), 0, name);
name = newname;
}
if (!name) return 0;
allocated = needed + filelen;
}
memmove(name, paths, needed * sizeof(WCHAR));
/* append '\\' if none is present */
if (needed > 0 && name[needed - 1] != '\\') name[needed++] = '\\';
strcpyW(&name[needed], search);
if (ext) strcatW(&name[needed], ext);
if (RtlDoesFileExists_U(name))
{
len = RtlGetFullPathName_U(name, buffer_size, buffer, file_part);
break;
}
paths = ptr;
}
RtlFreeHeap(GetProcessHeap(), 0, name);
}
else if (RtlDoesFileExists_U(search))
{
len = RtlGetFullPathName_U(search, buffer_size, buffer, file_part);
}
return len;
}
/******************************************************************
* collapse_path
*
* Helper for RtlGetFullPathName_U.
* Get rid of . and .. components in the path.
*/
static inline void collapse_path( WCHAR *path, UINT mark )
{
WCHAR *p, *next;
/* convert every / into a \ */
for (p = path; *p; p++) if (*p == '/') *p = '\\';
/* collapse duplicate backslashes */
next = path + max( 1, mark );
for (p = next; *p; p++) if (*p != '\\' || next[-1] != '\\') *next++ = *p;
*next = 0;
p = path + mark;
while (*p)
{
if (*p == '.')
{
switch(p[1])
{
case '\\': /* .\ component */
next = p + 2;
memmove( p, next, (strlenW(next) + 1) * sizeof(WCHAR) );
continue;
case 0: /* final . */
if (p > path + mark) p--;
*p = 0;
continue;
case '.':
if (p[2] == '\\') /* ..\ component */
{
next = p + 3;
if (p > path + mark)
{
p--;
while (p > path + mark && p[-1] != '\\') p--;
}
memmove( p, next, (strlenW(next) + 1) * sizeof(WCHAR) );
continue;
}
else if (!p[2]) /* final .. */
{
if (p > path + mark)
{
p--;
while (p > path + mark && p[-1] != '\\') p--;
if (p > path + mark) p--;
}
*p = 0;
continue;
}
break;
}
}
/* skip to the next component */
while (*p && *p != '\\') p++;
if (*p == '\\')
{
/* remove last dot in previous dir name */
if (p > path + mark && p[-1] == '.') memmove( p-1, p, (strlenW(p) + 1) * sizeof(WCHAR) );
else p++;
}
}
/* remove trailing spaces and dots (yes, Windows really does that, don't ask) */
while (p > path + mark && (p[-1] == ' ' || p[-1] == '.')) p--;
*p = 0;
}
/******************************************************************
* skip_unc_prefix
*
* Skip the \\share\dir\ part of a file name. Helper for RtlGetFullPathName_U.
*/
static const WCHAR *skip_unc_prefix( const WCHAR *ptr )
{
ptr += 2;
while (*ptr && !IS_SEPARATOR(*ptr)) ptr++; /* share name */
while (IS_SEPARATOR(*ptr)) ptr++;
while (*ptr && !IS_SEPARATOR(*ptr)) ptr++; /* dir name */
while (IS_SEPARATOR(*ptr)) ptr++;
return ptr;
}
/******************************************************************
* get_full_path_helper
*
* Helper for RtlGetFullPathName_U
* Note: name and buffer are allowed to point to the same memory spot
*/
static ULONG get_full_path_helper(LPCWSTR name, LPWSTR buffer, ULONG size)
{
ULONG reqsize = 0, mark = 0, dep = 0, deplen;
LPWSTR ins_str = NULL;
LPCWSTR ptr;
const UNICODE_STRING* cd;
WCHAR tmp[4];
/* return error if name only consists of spaces */
for (ptr = name; *ptr; ptr++) if (*ptr != ' ') break;
if (!*ptr) return 0;
RtlAcquirePebLock();
if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
cd = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir.DosPath;
else
cd = &NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectory.DosPath;
switch (RtlDetermineDosPathNameType_U(name))
{
case UNC_PATH: /* \\foo */
ptr = skip_unc_prefix( name );
mark = (ptr - name);
break;
case DEVICE_PATH: /* \\.\foo */
mark = 4;
break;
case ABSOLUTE_DRIVE_PATH: /* c:\foo */
reqsize = sizeof(WCHAR);
tmp[0] = toupperW(name[0]);
ins_str = tmp;
dep = 1;
mark = 3;
break;
case RELATIVE_DRIVE_PATH: /* c:foo */
dep = 2;
if (toupperW(name[0]) != toupperW(cd->Buffer[0]) || cd->Buffer[1] != ':')
{
UNICODE_STRING var, val;
tmp[0] = '=';
tmp[1] = name[0];
tmp[2] = ':';
tmp[3] = '\0';
var.Length = 3 * sizeof(WCHAR);
var.MaximumLength = 4 * sizeof(WCHAR);
var.Buffer = tmp;
val.Length = 0;
val.MaximumLength = size;
val.Buffer = RtlAllocateHeap(GetProcessHeap(), 0, size);
switch (RtlQueryEnvironmentVariable_U(NULL, &var, &val))
{
case STATUS_SUCCESS:
/* FIXME: Win2k seems to check that the environment variable actually points
* to an existing directory. If not, root of the drive is used
* (this seems also to be the only spot in RtlGetFullPathName that the
* existence of a part of a path is checked)
*/
/* fall thru */
case STATUS_BUFFER_TOO_SMALL:
reqsize = val.Length + sizeof(WCHAR); /* append trailing '\\' */
val.Buffer[val.Length / sizeof(WCHAR)] = '\\';
ins_str = val.Buffer;
break;
case STATUS_VARIABLE_NOT_FOUND:
reqsize = 3 * sizeof(WCHAR);
tmp[0] = name[0];
tmp[1] = ':';
tmp[2] = '\\';
ins_str = tmp;
break;
default:
ERR("Unsupported status code\n");
break;
}
mark = 3;
break;
}
/* fall through */
case RELATIVE_PATH: /* foo */
reqsize = cd->Length;
ins_str = cd->Buffer;
if (cd->Buffer[1] != ':')
{
ptr = skip_unc_prefix( cd->Buffer );
mark = ptr - cd->Buffer;
}
else mark = 3;
break;
case ABSOLUTE_PATH: /* \xxx */
if (name[0] == '/') /* may be a Unix path */
{
const WCHAR *ptr = name;
int drive = find_drive_rootW( &ptr );
if (drive != -1)
{
reqsize = 3 * sizeof(WCHAR);
tmp[0] = 'A' + drive;
tmp[1] = ':';
tmp[2] = '\\';
ins_str = tmp;
mark = 3;
dep = ptr - name;
break;
}
}
if (cd->Buffer[1] == ':')
{
reqsize = 2 * sizeof(WCHAR);
tmp[0] = cd->Buffer[0];
tmp[1] = ':';
ins_str = tmp;
mark = 3;
}
else
{
ptr = skip_unc_prefix( cd->Buffer );
reqsize = (ptr - cd->Buffer) * sizeof(WCHAR);
mark = reqsize / sizeof(WCHAR);
ins_str = cd->Buffer;
}
break;
case UNC_DOT_PATH: /* \\. */
reqsize = 4 * sizeof(WCHAR);
dep = 3;
tmp[0] = '\\';
tmp[1] = '\\';
tmp[2] = '.';
tmp[3] = '\\';
ins_str = tmp;
mark = 4;
break;
case INVALID_PATH:
goto done;
}
/* enough space ? */
deplen = strlenW(name + dep) * sizeof(WCHAR);
if (reqsize + deplen + sizeof(WCHAR) > size)
{
/* not enough space, return need size (including terminating '\0') */
reqsize += deplen + sizeof(WCHAR);
goto done;
}
memmove(buffer + reqsize / sizeof(WCHAR), name + dep, deplen + sizeof(WCHAR));
if (reqsize) memcpy(buffer, ins_str, reqsize);
reqsize += deplen;
if (ins_str != tmp && ins_str != cd->Buffer)
RtlFreeHeap(GetProcessHeap(), 0, ins_str);
collapse_path( buffer, mark );
reqsize = strlenW(buffer) * sizeof(WCHAR);
done:
RtlReleasePebLock();
return reqsize;
}
/******************************************************************
* RtlGetFullPathName_U (NTDLL.@)
*
* Returns the number of bytes written to buffer (not including the
* terminating NULL) if the function succeeds, or the required number of bytes
* (including the terminating NULL) if the buffer is too small.
*
* file_part will point to the filename part inside buffer (except if we use
* DOS device name, in which case file_in_buf is NULL)
*
*/
DWORD WINAPI RtlGetFullPathName_U(const WCHAR* name, ULONG size, WCHAR* buffer,
WCHAR** file_part)
{
WCHAR* ptr;
DWORD dosdev;
DWORD reqsize;
TRACE("(%s %u %p %p)\n", debugstr_w(name), size, buffer, file_part);
if (!name || !*name) return 0;
if (file_part) *file_part = NULL;
/* check for DOS device name */
dosdev = RtlIsDosDeviceName_U(name);
if (dosdev)
{
DWORD offset = HIWORD(dosdev) / sizeof(WCHAR); /* get it in WCHARs, not bytes */
DWORD sz = LOWORD(dosdev); /* in bytes */
if (8 + sz + 2 > size) return sz + 10;
strcpyW(buffer, DeviceRootW);
memmove(buffer + 4, name + offset, sz);
buffer[4 + sz / sizeof(WCHAR)] = '\0';
/* file_part isn't set in this case */
return sz + 8;
}
reqsize = get_full_path_helper(name, buffer, size);
if (!reqsize) return 0;
if (reqsize > size)
{
LPWSTR tmp = RtlAllocateHeap(GetProcessHeap(), 0, reqsize);
reqsize = get_full_path_helper(name, tmp, reqsize);
if (reqsize + sizeof(WCHAR) > size) /* it may have worked the second time */
{
RtlFreeHeap(GetProcessHeap(), 0, tmp);
return reqsize + sizeof(WCHAR);
}
memcpy( buffer, tmp, reqsize + sizeof(WCHAR) );
RtlFreeHeap(GetProcessHeap(), 0, tmp);
}
/* find file part */
if (file_part && (ptr = strrchrW(buffer, '\\')) != NULL && ptr >= buffer + 2 && *++ptr)
*file_part = ptr;
return reqsize;
}
/*************************************************************************
* RtlGetLongestNtPathLength [NTDLL.@]
*
* Get the longest allowed path length
*
* PARAMS
* None.
*
* RETURNS
* The longest allowed path length (277 characters under Win2k).
*/
DWORD WINAPI RtlGetLongestNtPathLength(void)
{
return MAX_NT_PATH_LENGTH;
}
/******************************************************************
* RtlIsNameLegalDOS8Dot3 (NTDLL.@)
*
* Returns TRUE iff unicode is a valid DOS (8+3) name.
* If the name is valid, oem gets filled with the corresponding OEM string
* spaces is set to TRUE if unicode contains spaces
*/
BOOLEAN WINAPI RtlIsNameLegalDOS8Dot3( const UNICODE_STRING *unicode,
OEM_STRING *oem, BOOLEAN *spaces )
{
static const char illegal[] = "*?<>|\"+=,;[]:/\\\345";
int dot = -1;
int i;
char buffer[12];
OEM_STRING oem_str;
BOOLEAN got_space = FALSE;
if (!oem)
{
oem_str.Length = sizeof(buffer);
oem_str.MaximumLength = sizeof(buffer);
oem_str.Buffer = buffer;
oem = &oem_str;
}
if (RtlUpcaseUnicodeStringToCountedOemString( oem, unicode, FALSE ) != STATUS_SUCCESS)
return FALSE;
if (oem->Length > 12) return FALSE;
/* a starting . is invalid, except for . and .. */
if (oem->Buffer[0] == '.')
{
if (oem->Length != 1 && (oem->Length != 2 || oem->Buffer[1] != '.')) return FALSE;
if (spaces) *spaces = FALSE;
return TRUE;
}
for (i = 0; i < oem->Length; i++)
{
switch (oem->Buffer[i])
{
case ' ':
/* leading/trailing spaces not allowed */
if (!i || i == oem->Length-1 || oem->Buffer[i+1] == '.') return FALSE;
got_space = TRUE;
break;
case '.':
if (dot != -1) return FALSE;
dot = i;
break;
default:
if (strchr(illegal, oem->Buffer[i])) return FALSE;
break;
}
}
/* check file part is shorter than 8, extension shorter than 3
* dot cannot be last in string
*/
if (dot == -1)
{
if (oem->Length > 8) return FALSE;
}
else
{
if (dot > 8 || (oem->Length - dot > 4) || dot == oem->Length - 1) return FALSE;
}
if (spaces) *spaces = got_space;
return TRUE;
}
/******************************************************************
* RtlGetCurrentDirectory_U (NTDLL.@)
*
*/
NTSTATUS WINAPI RtlGetCurrentDirectory_U(ULONG buflen, LPWSTR buf)
{
UNICODE_STRING* us;
ULONG len;
TRACE("(%u %p)\n", buflen, buf);
RtlAcquirePebLock();
if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
us = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir.DosPath;
else
us = &NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectory.DosPath;
len = us->Length / sizeof(WCHAR);
if (us->Buffer[len - 1] == '\\' && us->Buffer[len - 2] != ':')
len--;
if (buflen / sizeof(WCHAR) > len)
{
memcpy(buf, us->Buffer, len * sizeof(WCHAR));
buf[len] = '\0';
}
else
{
len++;
}
RtlReleasePebLock();
return len * sizeof(WCHAR);
}
/******************************************************************
* RtlSetCurrentDirectory_U (NTDLL.@)
*
*/
NTSTATUS WINAPI RtlSetCurrentDirectory_U(const UNICODE_STRING* dir)
{
FILE_FS_DEVICE_INFORMATION device_info;
OBJECT_ATTRIBUTES attr;
UNICODE_STRING newdir;
IO_STATUS_BLOCK io;
CURDIR *curdir;
HANDLE handle;
NTSTATUS nts;
ULONG size;
PWSTR ptr;
newdir.Buffer = NULL;
RtlAcquirePebLock();
if (NtCurrentTeb()->Tib.SubSystemTib) /* FIXME: hack */
curdir = &((WIN16_SUBSYSTEM_TIB *)NtCurrentTeb()->Tib.SubSystemTib)->curdir;
else
curdir = &NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectory;
if (!RtlDosPathNameToNtPathName_U( dir->Buffer, &newdir, NULL, NULL ))
{
nts = STATUS_OBJECT_NAME_INVALID;
goto out;
}
attr.Length = sizeof(attr);
attr.RootDirectory = 0;
attr.Attributes = OBJ_CASE_INSENSITIVE;
attr.ObjectName = &newdir;
attr.SecurityDescriptor = NULL;
attr.SecurityQualityOfService = NULL;
nts = NtOpenFile( &handle, 0, &attr, &io, 0, FILE_DIRECTORY_FILE | FILE_SYNCHRONOUS_IO_NONALERT );
if (nts != STATUS_SUCCESS) goto out;
/* don't keep the directory handle open on removable media */
if (!NtQueryVolumeInformationFile( handle, &io, &device_info,
sizeof(device_info), FileFsDeviceInformation ) &&
(device_info.Characteristics & FILE_REMOVABLE_MEDIA))
{
NtClose( handle );
handle = 0;
}
if (curdir->Handle) NtClose( curdir->Handle );
curdir->Handle = handle;
/* append trailing \ if missing */
size = newdir.Length / sizeof(WCHAR);
ptr = newdir.Buffer;
ptr += 4; /* skip \??\ prefix */
size -= 4;
if (size && ptr[size - 1] != '\\') ptr[size++] = '\\';
memcpy( curdir->DosPath.Buffer, ptr, size * sizeof(WCHAR));
curdir->DosPath.Buffer[size] = 0;
curdir->DosPath.Length = size * sizeof(WCHAR);
TRACE( "curdir now %s %p\n", debugstr_w(curdir->DosPath.Buffer), curdir->Handle );
out:
RtlFreeUnicodeString( &newdir );
RtlReleasePebLock();
return nts;
}
/******************************************************************
* wine_unix_to_nt_file_name (NTDLL.@) Not a Windows API
*/
NTSTATUS wine_unix_to_nt_file_name( const ANSI_STRING *name, UNICODE_STRING *nt )
{
static const WCHAR prefixW[] = {'\\','?','?','\\','A',':','\\'};
unsigned int lenW, lenA = name->Length;
const char *path = name->Buffer;
char *cwd;
WCHAR *p;
NTSTATUS status;
int drive;
if (!lenA || path[0] != '/')
{
char *newcwd, *end;
size_t size;
if ((status = DIR_get_unix_cwd( &cwd )) != STATUS_SUCCESS) return status;
size = strlen(cwd) + lenA + 1;
if (!(newcwd = RtlReAllocateHeap( GetProcessHeap(), 0, cwd, size )))
{
status = STATUS_NO_MEMORY;
goto done;
}
cwd = newcwd;
end = cwd + strlen(cwd);
if (end > cwd && end[-1] != '/') *end++ = '/';
memcpy( end, path, lenA );
lenA += end - cwd;
path = cwd;
status = find_drive_rootA( &path, lenA, &drive );
lenA -= (path - cwd);
}
else
{
cwd = NULL;
status = find_drive_rootA( &path, lenA, &drive );
lenA -= (path - name->Buffer);
}
if (status != STATUS_SUCCESS) goto done;
while (lenA && path[0] == '/') { lenA--; path++; }
lenW = ntdll_umbstowcs( 0, path, lenA, NULL, 0 );
if (!(nt->Buffer = RtlAllocateHeap( GetProcessHeap(), 0,
(lenW + 1) * sizeof(WCHAR) + sizeof(prefixW) )))
{
status = STATUS_NO_MEMORY;
goto done;
}
memcpy( nt->Buffer, prefixW, sizeof(prefixW) );
nt->Buffer[4] += drive;
ntdll_umbstowcs( 0, path, lenA, nt->Buffer + sizeof(prefixW)/sizeof(WCHAR), lenW );
lenW += sizeof(prefixW)/sizeof(WCHAR);
nt->Buffer[lenW] = 0;
nt->Length = lenW * sizeof(WCHAR);
nt->MaximumLength = nt->Length + sizeof(WCHAR);
for (p = nt->Buffer + sizeof(prefixW)/sizeof(WCHAR); *p; p++) if (*p == '/') *p = '\\';
done:
RtlFreeHeap( GetProcessHeap(), 0, cwd );
return status;
}
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