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Cygwin: mkdir: create case-sensitive dirs

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On Windows 10 1803 and later, create dirs under the Cygwin
installation dir as case sensitive, if WSL is installed.

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
This commit is contained in:
Corinna Vinschen
2018-12-25 01:09:12 +01:00
parent 92edcf929a
commit 4021509ba2
1 changed files with 34 additions and 0 deletions
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34
winsup/cygwin/fhandler_disk_file.cc
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@@ -1760,6 +1760,10 @@ fhandler_disk_file::mkdir (mode_t mode)
I don't know what setting that is or how to recognize such a share,
so for now we don't request WRITE_DAC on remote drives. */
access |= READ_CONTROL | WRITE_DAC;
/* Setting case sensitivity requires FILE_WRITE_ATTRIBUTES. */
if (wincap.has_case_sensitive_dirs ()
&& !pc.isremote () && pc.fs_is_ntfs ())
access |= FILE_WRITE_ATTRIBUTES;
status = NtCreateFile (&dir, access, pc.get_object_attr (attr, sa), &io, NULL,
FILE_ATTRIBUTE_DIRECTORY, FILE_SHARE_VALID_FLAGS,
FILE_CREATE,
@@ -1773,6 +1777,36 @@ fhandler_disk_file::mkdir (mode_t mode)
pc.file_attributes (FILE_ATTRIBUTE_DIRECTORY);
if (has_acls ())
set_created_file_access (dir, pc, mode & 07777);
/* Starting with Windows 10 1803, try to create all dirs below the
installation root as case-sensitive. If STATUS_NOT_SUPPORTED
is returned, WSL isn't installed (unfortunately a requirement
for this functionality. */
if (wincap.has_case_sensitive_dirs ()
&& !pc.isremote () && pc.fs_is_ntfs ())
{
PUNICODE_STRING new_dir = pc.get_nt_native_path ();
PUNICODE_STRING root_dir = &cygheap->installation_root;
if (RtlEqualUnicodePathPrefix (new_dir, root_dir, TRUE)
&& new_dir->Buffer[root_dir->Length / sizeof (WCHAR)] == L'\\')
{
FILE_CASE_SENSITIVE_INFORMATION fcsi;
fcsi.Flags = FILE_CS_FLAG_CASE_SENSITIVE_DIR;
status = NtSetInformationFile (dir, &io, &fcsi, sizeof fcsi,
FileCaseSensitiveInformation);
if (!NT_SUCCESS (status))
{
debug_printf ("Setting dir case sensitivity, status %y",
status);
if (status == STATUS_NOT_SUPPORTED)
{
debug_printf ("Dir case sensitivity requires WSL");
wincap.disable_case_sensitive_dirs ();
}
}
}
}
NtClose (dir);
res = 0;
}