7 Jan
2005
7 Jan
'05
3:07 p.m.
Fixed RtlGetFullPathName_U bug (didn't remove duplicate slashes) and
general ugliness by rippin fresh version from wine. Makes w2k cmd.exe
work (imo) 100%.
Modified: trunk/reactos/include/ntdll/rtl.h
Modified: trunk/reactos/lib/ntdll/rtl/path.c
_____
Modified: trunk/reactos/include/ntdll/rtl.h
--- trunk/reactos/include/ntdll/rtl.h 2005-01-07 13:48:53 UTC (rev
12868)
+++ trunk/reactos/include/ntdll/rtl.h 2005-01-07 15:07:52 UTC (rev
12869)
@@ -17,6 +17,13 @@
#ifndef __USE_W32API
+#define RTL_CONSTANT_STRING(__SOURCE_STRING__) \
+{ \
+ sizeof(__SOURCE_STRING__) - sizeof((__SOURCE_STRING__)[0]), \
+ sizeof(__SOURCE_STRING__), \
+ (__SOURCE_STRING__) \
+}
+
typedef struct _DEBUG_BUFFER
{
HANDLE SectionHandle;
@@ -355,7 +362,7 @@
ULONG
STDCALL
RtlGetFullPathName_U (
- WCHAR *dosname,
+ const WCHAR *dosname,
ULONG size,
WCHAR *buf,
WCHAR **shortname
_____
Modified: trunk/reactos/lib/ntdll/rtl/path.c
--- trunk/reactos/lib/ntdll/rtl/path.c 2005-01-07 13:48:53 UTC (rev
12868)
+++ trunk/reactos/lib/ntdll/rtl/path.c 2005-01-07 15:07:52 UTC (rev
12869)
@@ -12,9 +12,11 @@
#include <ddk/ntddk.h>
#include <ntdll/rtl.h>
+#include <ntos/minmax.h>
#include <string.h>
#include <stdio.h>
#include <ctype.h>
+#include <base.h>
#include <ddk/obfuncs.h>
#define NDEBUG
@@ -26,142 +28,28 @@
#define IS_PATH_SEPARATOR(x) (((x)==L'\\')||((x)==L'/'))
+
/* GLOBALS
********************************************************************/
-static const UNICODE_STRING _condev =
-{
- .Length = sizeof(L"\\\\.\\CON") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"\\\\.\\CON"),
- .Buffer = L"\\\\.\\CON"
-};
+static const WCHAR DeviceRootW[] = L"\\\\.\\";
-static const UNICODE_STRING _lpt =
-{
- .Length = sizeof(L"LPT") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"LPT"),
- .Buffer = L"LPT"
-};
+static const UNICODE_STRING _condev =
RTL_CONSTANT_STRING(L"\\\\.\\CON");
-static const UNICODE_STRING _com =
-{
- .Length = sizeof(L"COM") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"COM"),
- .Buffer = L"COM"
-};
+static const UNICODE_STRING _lpt = RTL_CONSTANT_STRING(L"LPT");
-static const UNICODE_STRING _prn =
-{
- .Length = sizeof(L"PRN") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"PRN"),
- .Buffer = L"PRN"
-};
+static const UNICODE_STRING _com = RTL_CONSTANT_STRING(L"COM");
-static const UNICODE_STRING _aux =
-{
- .Length = sizeof(L"AUX") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"AUX"),
- .Buffer = L"AUX"
-};
+static const UNICODE_STRING _prn = RTL_CONSTANT_STRING(L"PRN");
-static const UNICODE_STRING _con =
-{
- .Length = sizeof(L"CON") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"CON"),
- .Buffer = L"CON"
-};
+static const UNICODE_STRING _aux = RTL_CONSTANT_STRING(L"AUX");
-static const UNICODE_STRING _nul =
-{
- .Length = sizeof(L"NUL") - sizeof(WCHAR),
- .MaximumLength = sizeof(L"NUL"),
- .Buffer = L"NUL"
-};
+static const UNICODE_STRING _con = RTL_CONSTANT_STRING(L"CON");
+static const UNICODE_STRING _nul = RTL_CONSTANT_STRING(L"NUL");
+
/* FUNCTIONS
*****************************************************************/
-static ULONG RtlpGetDotSequence (PWSTR p)
-{
- ULONG Count = 0;
-
- for (;;)
- {
- if (*p == '.')
- Count++;
- else if ((*p == '\\' || *p == '\0') && Count)
- return Count;
- else
- return 0;
- p++;
- }
- return 0;
-}
-
-static VOID RtlpEatPath (PWSTR Path)
-{
- PWSTR p, prev;
-
- p = Path + 2;
- prev = p;
-
- while ((*p) != 0 || ((*p) == L'\\' && (*(p+1)) == 0))
- {
- ULONG DotLen;
-
- DotLen = RtlpGetDotSequence (p+1);
- DPRINT("DotSequenceLength %u\n", DotLen);
- DPRINT("prev '%S' p '%S'\n",prev,p);
-
- if (DotLen == 0)
- {
- prev = p;
- p = wcschr(p + 1, L'\\');
- if (p == NULL)
- {
- break;
- }
- }
- else if (DotLen == 1)
- {
- wcscpy (p, p+2);
- }
- else
- {
- if (DotLen > 2)
- {
- int n = DotLen - 2;
-
- while (n > 0 && prev > (Path + 2))
- {
- prev--;
- if ((*prev) == L'\\')
- n--;
- }
- }
-
- if (*(p + DotLen + 1) == 0)
- *(prev + 1) = 0;
- else
- wcscpy (prev, p + DotLen + 1);
- p = prev;
- if (prev > (Path + 2))
- {
- prev--;
- while ((*prev) != L'\\')
- {
- prev--;
- }
- }
- }
- }
- if (Path[2] == 0)
- {
- Path[2] = L'\\';
- Path[3] = 0;
- }
-}
-
-
/*
* @implemented
*/
@@ -532,224 +420,338 @@
return STATUS_SUCCESS;
}
-/*
- * @implemented
+
+
+/******************************************************************
+ * collapse_path
+ *
+ * Helper for RtlGetFullPathName_U.
+ * 1) Convert slashes into backslashes
+ * 2) Get rid of duplicate backslashes
+ * 3) Get rid of . and .. components in the path.
*/
-ULONG STDCALL
-RtlGetFullPathName_U(PWSTR DosName,
- ULONG size,
- PWSTR buf,
- PWSTR *FilePart)
+static inline void collapse_path( WCHAR *path, UINT mark )
{
- WCHAR *wcs, var[4], drive;
- ULONG len;
- ULONG templen = 0;
- DWORD offs, sz, type;
- UNICODE_STRING usvar, pfx;
- PCURDIR cd;
- NTSTATUS Status;
- WCHAR TempFullPathName[MAX_PATH] = L"";
+ WCHAR *p, *next;
- DPRINT("RtlGetFullPathName_U %S %ld %p %p\n",
- DosName, size, buf, FilePart);
+ /* convert every / into a \ */
+ for (p = path; *p; p++) if (*p == '/') *p = '\\';
- /* FIXME: this code is a mess! We should use Wine's implementation
- of this function, since it's cleaner and IMO better. -Gunnar */
-
- if (!DosName || !*DosName)
- return 0;
+ /* collapse duplicate backslashes */
+ next = path + max( 1, mark );
+ for (p = next; *p; p++) if (*p != '\\' || next[-1] != '\\') *next++
= *p;
+ *next = 0;
- len = wcslen (DosName);
+ p = path + mark;
+ while (*p)
+ {
+ if (*p == '.')
+ {
+ switch(p[1])
+ {
+ case '\\': /* .\ component */
+ next = p + 2;
+ memmove( p, next, (wcslen(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, (wcslen(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 == '\\') p++;
+ }
- /* strip trailing spaces */
- while (len && DosName[len - 1] == L' ')
- len--;
- if (!len)
- return 0;
-
- /* strip trailing path separator (but don't change '\') */
- if ((len > 1) &&
- IS_PATH_SEPARATOR(DosName[len - 1]))
- len--;
- if (FilePart)
- *FilePart = NULL;
- if (buf)
- *buf = 0;
+ /* remove trailing spaces and dots (yes, Windows really does that,
don't ask) */
+ while (p > path + mark && (p[-1] == ' ' || p[-1] == '.'))
p--;
+ *p = 0;
+}
-CHECKPOINT;
- /* check for DOS device name */
- sz = RtlIsDosDeviceName_U (DosName);
- if (sz)
- {
- offs = sz >> 17;
- sz &= 0x0000FFFF;
- if (sz + 8 >= size)
- return sz + 10;
- if (buf)
- {
- wcscpy (buf, L"\\\\.\\");
- wcsncat (buf, DosName + offs, sz /
sizeof(WCHAR));
- }
- return sz + 8;
- }
-CHECKPOINT;
- type = RtlDetermineDosPathNameType_U (DosName);
- RtlAcquirePebLock();
+/******************************************************************
+ * 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_PATH_SEPARATOR(*ptr)) ptr++; /* share name */
+ while (IS_PATH_SEPARATOR(*ptr)) ptr++;
+ while (*ptr && !IS_PATH_SEPARATOR(*ptr)) ptr++; /* dir name */
+ while (IS_PATH_SEPARATOR(*ptr)) ptr++;
+ return ptr;
+}
- cd = (PCURDIR)&(NtCurrentPeb
()->ProcessParameters->CurrentDirectoryName);
-DPRINT("type %ld\n", type);
- switch (type)
- {
- case 1: /* \\xxx or \\.xxx */
- case 6: /* \\.\xxx */
- break;
- case 2:
- break;
-#if 0
- /* this makes a direct CreateFileW call crash! */
+/******************************************************************
+ * 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;
+ DOS_PATHNAME_TYPE type;
+ LPWSTR ins_str = NULL;
+ LPCWSTR ptr;
+ const UNICODE_STRING* cd;
+ WCHAR tmp[4];
- case 2: /* x:\xxx */
- *DosName = RtlUpcaseUnicodeChar (*DosName);
- break;
-#endif
+ /* return error if name only consists of spaces */
+ for (ptr = name; *ptr; ptr++) if (*ptr != ' ') break;
+ if (!*ptr) return 0;
- case 3: /* x:xxx */
- drive = RtlUpcaseUnicodeChar (*DosName);
- DosName += 2;
- len -= 2;
-CHECKPOINT;
- if (drive == RtlUpcaseUnicodeChar
(cd->DosPath.Buffer[0]))
- {
-CHECKPOINT;
- memcpy (TempFullPathName,
cd->DosPath.Buffer, cd->DosPath.Length);
- templen = cd->DosPath.Length /
sizeof(WCHAR);
- }
- else
- {
-CHECKPOINT;
- var[0] = L'=';
- var[1] = drive;
- var[2] = L':';
- var[3] = 0;
- usvar.Length = 3 * sizeof(WCHAR);
- usvar.MaximumLength = 4 * sizeof(WCHAR);
- usvar.Buffer = var;
- pfx.Length = 0;
- pfx.MaximumLength = MAX_PATH;
- pfx.Buffer = TempFullPathName;
- Status = RtlQueryEnvironmentVariable_U
(NULL,
-
&usvar,
-
&pfx);
-CHECKPOINT;
- if (!NT_SUCCESS(Status))
- {
-CHECKPOINT;
- if (Status ==
STATUS_BUFFER_TOO_SMALL)
- return pfx.Length + len
* 2 + 2;
-CHECKPOINT;
- TempFullPathName[0] = drive;
- TempFullPathName[1] = L':';
- TempFullPathName[2] = L'\\';
- TempFullPathName[3] = 0;
- templen = 3;
- }
- else
- {
-CHECKPOINT;
- templen = pfx.Length /
sizeof(WCHAR);
- }
+ RtlAcquirePebLock();
- }
- break;
+ cd =
&((PCURDIR)&NtCurrentTeb()->Peb->ProcessParameters->CurrentDirectoryName
)->DosPath;
- case 4: /* \xxx */
- wcsncpy (TempFullPathName, cd->DosPath.Buffer,
2);
- TempFullPathName[2] = 0;
- templen = wcslen(TempFullPathName);
- break;
+ switch (type = RtlDetermineDosPathNameType_U(name))
+ {
+ case UNC_PATH: /* \\foo */
+ ptr = skip_unc_prefix( name );
+ mark = (ptr - name);
+ break;
- case 5: /* xxx */
- memcpy (TempFullPathName, cd->DosPath.Buffer,
cd->DosPath.Length);
- templen = cd->DosPath.Length / sizeof(WCHAR);
- break;
+ case DEVICE_PATH: /* \\.\foo */
+ mark = 4;
+ break;
- case 7: /* \\. */
- memcpy (TempFullPathName, L"\\\\.\\", 8);
- templen = 4;
- break;
+ case ABSOLUTE_DRIVE_PATH: /* c:\foo */
+ reqsize = sizeof(WCHAR);
+ tmp[0] = towupper(name[0]);
+ ins_str = tmp;
+ dep = 1;
+ mark = 3;
+ break;
- default:
- return 0;
- }
+ case RELATIVE_DRIVE_PATH: /* c:foo */
+ dep = 2;
+ if (towupper(name[0]) != towupper(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(RtlGetProcessHeap(), 0, size);
- RtlReleasePebLock();
+ 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:
+ DPRINT1("Unsupported status code\n");
+ break;
+ }
+ mark = 3;
+ break;
+ }
+ /* fall through */
- DPRINT("TempFullPathName \'%S\' DosName \'%S\' len %ld\n",
TempFullPathName, DosName, len);
- /* add dosname to prefix */
- memcpy (TempFullPathName + templen, DosName, len *
sizeof(WCHAR));
-
- /* dirty/temporary fix for the CreateFileW problem */
- if (type == 2){
- TempFullPathName[0] = RtlUpcaseUnicodeChar(TempFullPathName[0]);
- }
- len += templen;
- TempFullPathName[len] = 0;
+ 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;
- CHECKPOINT;
- /* replace slashes */
- wcs = wcschr(TempFullPathName, L'/');
- while(wcs)
- {
- *wcs = L'\\';
- wcs = wcschr(wcs + 1, L'/');
- }
+ case ABSOLUTE_PATH: /* \xxx */
+#ifdef __WINE__
+ if (name[0] == '/') /* may be a Unix path */
+ {
+ const WCHAR *ptr = name;
+ int drive = find_drive_root( &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;
+ }
+ }
+#endif
+ 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;
- if (len == 2 && TempFullPathName[1] == L':')
- {
- TempFullPathName[len++] = L'\\';
- TempFullPathName[len] = 0;
- }
+ 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;
+ }
- DPRINT("TempFullPathName \'%S\'\n", TempFullPathName);
- RtlpEatPath (TempFullPathName);
- DPRINT("TempFullPathName \'%S\'\n", TempFullPathName);
+ /* enough space ? */
+ deplen = wcslen(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;
+ }
- len = wcslen (TempFullPathName);
+ memmove(buffer + reqsize / sizeof(WCHAR), name + dep, deplen +
sizeof(WCHAR));
+ if (reqsize) memcpy(buffer, ins_str, reqsize);
+ reqsize += deplen;
- if (len < (size / sizeof(WCHAR)))
- {
- if (buf)
- memcpy (buf, TempFullPathName, (len + 1) *
sizeof(WCHAR));
+ if (ins_str && ins_str != tmp && ins_str != cd->Buffer)
+ RtlFreeHeap(RtlGetProcessHeap(), 0, ins_str);
- /* find file part */
- if (FilePart && buf)
- {
-#if 0
- *FilePart = wcsrchr(buf, L'\\');
- if (*FilePart)
- {
- (*FilePart)++;
- }
- else
- {
- *FilePart = buf;
- }
-#else
- *FilePart = buf + len;
- while (*FilePart != buf && **FilePart != L'\\')
- --(*FilePart);
- if (**FilePart == L'\\')
- ++(*FilePart);
-#endif
- }
+ collapse_path( buffer, mark );
+ reqsize = wcslen(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)
+ *
+ * @implemented
+ */
+DWORD STDCALL RtlGetFullPathName_U(
+ const WCHAR* name,
+ ULONG size,
+ WCHAR* buffer,
+ WCHAR** file_part)
+{
+ WCHAR* ptr;
+ DWORD dosdev;
+ DWORD reqsize;
+
+ DPRINT("RtlGetFullPathName_U(%S %lu %p %p)\n", name, size, buffer,
file_part);
+
+ if (!name || !*name) return 0;
+
+ if (file_part) *file_part = NULL;
+
+ /* check for DOS device name */
+ dosdev = RtlIsDosDeviceName_U((WCHAR*)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;
+ wcscpy(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(RtlGetProcessHeap(), 0, reqsize);
+ reqsize = get_full_path_helper(name, tmp, reqsize);
+ if (reqsize > size) /* it may have worked the second time */
+ {
+ RtlFreeHeap(RtlGetProcessHeap(), 0, tmp);
+ return reqsize + sizeof(WCHAR);
}
+ memcpy( buffer, tmp, reqsize + sizeof(WCHAR) );
+ RtlFreeHeap(RtlGetProcessHeap(), 0, tmp);
+ }
- return len * sizeof(WCHAR);
+ /* find file part */
+ if (file_part && (ptr = wcsrchr(buffer, '\\')) != NULL && ptr
>=
buffer + 2 && *++ptr)
+ *file_part = ptr;
+ return reqsize;
}