There are two Windows system calls that currently fail with STATUS_IO_REPARSE_TAG_NOT_HANDLED when called on an AF_UNIX socket: a call to NtOpenFile in get_file_sd and a call to NtCreateFile in fhandler_base::open.
Fix this by adding the FILE_OPEN_REPARSE_POINT flag to those calls when the file is a known reparse point. --- winsup/cygwin/fhandler.cc | 11 +++++++++-- winsup/cygwin/security.cc | 4 +++- 2 files changed, 12 insertions(+), 3 deletions(-) diff --git a/winsup/cygwin/fhandler.cc b/winsup/cygwin/fhandler.cc index 82b21aff4..5dbbd4068 100644 --- a/winsup/cygwin/fhandler.cc +++ b/winsup/cygwin/fhandler.cc @@ -620,13 +620,20 @@ fhandler_base::open (int flags, mode_t mode) else create_disposition = (flags & O_CREAT) ? FILE_OPEN_IF : FILE_OPEN; - if (get_device () == FH_FS) + if (get_device () == FH_FS +#ifdef __WITH_AF_UNIX + || get_device () == FH_UNIX +#endif + ) { - /* Add the reparse point flag to known repares points, otherwise we + /* Add the reparse point flag to known reparse points, otherwise we open the target, not the reparse point. This would break lstat. */ if (pc.is_known_reparse_point ()) options |= FILE_OPEN_REPARSE_POINT; + } + if (get_device () == FH_FS) + { /* O_TMPFILE files are created with delete-on-close semantics, as well as with FILE_ATTRIBUTE_TEMPORARY. The latter speeds up file access, because the OS tries to keep the file in memory as much as possible. diff --git a/winsup/cygwin/security.cc b/winsup/cygwin/security.cc index 468b05164..91fdc1e42 100644 --- a/winsup/cygwin/security.cc +++ b/winsup/cygwin/security.cc @@ -65,7 +65,9 @@ get_file_sd (HANDLE fh, path_conv &pc, security_descriptor &sd, fh ? pc.init_reopen_attr (attr, fh) : pc.get_object_attr (attr, sec_none_nih), &io, FILE_SHARE_VALID_FLAGS, - FILE_OPEN_FOR_BACKUP_INTENT); + FILE_OPEN_FOR_BACKUP_INTENT + | pc.is_known_reparse_point () + ? FILE_OPEN_REPARSE_POINT : 0); if (!NT_SUCCESS (status)) { sd.free (); -- 2.28.0