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NikoandClaude Opus 5.5
673ff23c5b
_openat now opens files as openat does. It reads the mode argument only
when O_CREAT is set, as openat and _open do, and calls openat with the
same descriptor, path, flags and mode, so it returns the same
descriptors and errors.
The PS5 3.20 libkernel_sys export list (DNNDHH/PS5-3.20_Libs) has
_openat, NID bGVEgWXy6dg, as well as openat (A8Yk5AhNDck). In FreeBSD
11.4, _openat is the openat system call stub (lib/libc/sys/Makefile.inc,
amd64/SYS.h) and only libthr's openat adds a cancellation point
(thr_syscalls.c). openat here is not a cancellation point, so
forwarding to it leaves _openat without one, as in FreeBSD.
The openat debt entry now names _openat and no longer says that
O_NOFOLLOW is ignored: open, and so openat, has returned EMLINK for
O_NOFOLLOW on a symbolic link since 9421484572.
The kernel_sys test opens a file through a directory descriptor with
_openat and reads it back, creates one with O_CREAT, O_EXCL and mode
0600, checks outside Windows that it has mode 0600, reopens it for
writing, and checks EEXIST, EINVAL, EBADF and ENOTDIR.
Co-Authored-By: Claude Opus 5.5 <[email protected]>