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* fhandler.cc (fhandler_base::open): Open native symlinks with

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FILE_OPEN_REPARSE_POINT flag.  Fix typo in comment.
This commit is contained in:
Corinna Vinschen 2007-10-18 12:40:27 +00:00
parent 5b69737250
commit f3257492c4
2 changed files with 42 additions and 29 deletions
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5
winsup/cygwin/ChangeLog
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@ -1,3 +1,8 @@
2007-10-18 Corinna Vinschen <corinna@vinschen.de>
* fhandler.cc (fhandler_base::open): Open native symlinks with
FILE_OPEN_REPARSE_POINT flag. Fix typo in comment.
2007-10-18 Corinna Vinschen <corinna@vinschen.de> 2007-10-18 Corinna Vinschen <corinna@vinschen.de>
* include/sys/param.h (MAXPATHLEN): Define as PATH_MAX. * include/sys/param.h (MAXPATHLEN): Define as PATH_MAX.

66
winsup/cygwin/fhandler.cc
View File

@ -542,39 +542,47 @@ fhandler_base::open (int flags, mode_t mode)
if ((flags & O_EXCL) && (flags & O_CREAT)) if ((flags & O_EXCL) && (flags & O_CREAT))
create_disposition = FILE_CREATE; create_disposition = FILE_CREATE;
if (flags & O_CREAT && get_device () == FH_FS) if (get_device () == FH_FS)
{ {
file_attributes = FILE_ATTRIBUTE_NORMAL; /* Add the reparse point flag to native symlinks, otherwise we open the
/* If mode has no write bits set, we set the R/O attribute. */ target, not the symlink. This would break lstat. */
if (!(mode & (S_IWUSR | S_IWGRP | S_IWOTH))) if (pc.is_rep_symlink ())
file_attributes |= FILE_ATTRIBUTE_READONLY; create_options |= FILE_OPEN_REPARSE_POINT;
/* Starting with Windows 2000, when trying to overwrite an already
existing file with FILE_ATTRIBUTE_HIDDEN and/or FILE_ATTRIBUTE_SYSTEM
attribute set, CreateFile fails with ERROR_ACCESS_DENIED.
Per MSDN you have to create the file with the same attributes as
already specified for the file. */
if (has_attribute (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM))
file_attributes |= pc.file_attributes ();
/* If the file should actually be created and ntsec is on, if (flags & O_CREAT)
set files attributes. */
/* TODO: Don't remove the call to has_acls() unless there's a
solution for the security descriptor problem on remote samba
drives. The local user SID is used in set_security_attribute,
but the actual owner on the Samba share is the SID of the Unix
account. There's no transparent mapping between these accounts.
And Samba has a strange behaviour when creating a file. Apparently
it *first*( creates the file, *then* it looks if the security
descriptor matches. The result is that the file gets created, but
then NtCreateFile doesn't return a handle to the file and fails
with STATUS_ACCESS_DENIED. Go figure! */
if (allow_ntsec && has_acls ())
{ {
set_security_attribute (mode, &sa, sd); file_attributes = FILE_ATTRIBUTE_NORMAL;
attr.SecurityDescriptor = sa.lpSecurityDescriptor; /* If mode has no write bits set, we set the R/O attribute. */
if (!(mode & (S_IWUSR | S_IWGRP | S_IWOTH)))
file_attributes |= FILE_ATTRIBUTE_READONLY;
/* Starting with Windows 2000, when trying to overwrite an already
existing file with FILE_ATTRIBUTE_HIDDEN and/or FILE_ATTRIBUTE_SYSTEM
attribute set, CreateFile fails with ERROR_ACCESS_DENIED.
Per MSDN you have to create the file with the same attributes as
already specified for the file. */
if (has_attribute (FILE_ATTRIBUTE_HIDDEN | FILE_ATTRIBUTE_SYSTEM))
file_attributes |= pc.file_attributes ();
/* If the file should actually be created and ntsec is on,
set files attributes. */
/* TODO: Don't remove the call to has_acls() unless there's a
solution for the security descriptor problem on remote samba
drives. The local user SID is used in set_security_attribute,
but the actual owner on the Samba share is the SID of the Unix
account. There's no transparent mapping between these accounts.
And Samba has a strange behaviour when creating a file. Apparently
it *first* creates the file, *then* it looks if the security
descriptor matches. The result is that the file gets created, but
then NtCreateFile doesn't return a handle to the file and fails
with STATUS_ACCESS_DENIED. Go figure! */
if (allow_ntsec && has_acls ())
{
set_security_attribute (mode, &sa, sd);
attr.SecurityDescriptor = sa.lpSecurityDescriptor;
}
/* The file attributes are needed for later use in, e.g. fchmod. */
pc.file_attributes (file_attributes);
} }
/* The file attributes are needed for later use in, e.g. fchmod. */
pc.file_attributes (file_attributes);
} }
status = NtCreateFile (&x, access, &attr, &io, NULL, file_attributes, shared, status = NtCreateFile (&x, access, &attr, &io, NULL, file_attributes, shared,