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[MOUNTMGR]

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- Fix IsDriveLetter. CID 1206760.

svn path=/trunk/; revision=64798
This commit is contained in:
Thomas Faber 2014-10-18 10:11:02 +00:00
parent e383d6c605
commit 71451cf5dd
1 changed files with 20 additions and 12 deletions
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32
reactos/drivers/filters/mountmgr/symlink.c
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@ -923,27 +923,35 @@ DeleteSymbolicLinkNameFromMemory(IN PDEVICE_EXTENSION DeviceExtension,
BOOLEAN BOOLEAN
IsDriveLetter(PUNICODE_STRING SymbolicName) IsDriveLetter(PUNICODE_STRING SymbolicName)
{ {
WCHAR Letter; WCHAR Letter, Colon;
BOOLEAN Result = FALSE;
/* We must have a precise length */ /* We must have a precise length */
if (SymbolicName->Length != sizeof(DosDevices.Buffer) + 2 * sizeof(WCHAR)) if (SymbolicName->Length != DosDevices.Length + 2 * sizeof(WCHAR))
{ {
return FALSE; return FALSE;
} }
/* Check if len is correct */ /* Must start with the DosDevices prefix */
Letter = SymbolicName->Buffer[sizeof(DosDevices.Buffer) / sizeof(WCHAR)]; if (!RtlPrefixUnicodeString(&DosDevices, SymbolicName, TRUE))
if (((Letter >= L'A' && Letter <= L'Z') || Letter == (WCHAR)-1) &&
SymbolicName->Buffer[(sizeof(DosDevices.Buffer) + sizeof(WCHAR)) / sizeof (WCHAR)] == L':')
{ {
/* In case it's not a normal drive letter, check differently */ return FALSE;
SymbolicName->Length = sizeof(DosDevices.Buffer);
Result = RtlEqualUnicodeString(SymbolicName, &DosDevices, TRUE);
SymbolicName->Length = sizeof(DosDevices.Buffer) + 2 * sizeof(WCHAR);
} }
return Result; /* Check if letter is correct */
Letter = SymbolicName->Buffer[DosDevices.Length / sizeof(WCHAR)];
if ((Letter < L'A' || Letter > L'Z') && Letter != (WCHAR)-1)
{
return FALSE;
}
/* And finally it must end with a colon */
Colon = SymbolicName->Buffer[DosDevices.Length / sizeof(WCHAR) + 1];
if (Colon != L':')
{
return FALSE;
}
return TRUE;
} }
/* /*