Still fail to get the file discriptor?

[Userzxcvbvnm]

This is related to #4753, which may not be resolved.

[maminrayej]

I figured out the difference in our setup. With wasix-libc, the provided test works, but using wasi-libc it does not.

[Userzxcvbvnm]

This may be related to #4245

[Userzxcvbvnm]

We checked different OS permission with different openstyle, and found that wasmer is different from other WASM runtimes, including wasmtime, WAMR and WasmEdge.
The behavior of other WASM runtimes is as expected.
There are two kinds of bugs in wasmer:
(FILENAME->0600 means change the permission of a file to 0600, rw-------
DIRNAME->0700 means change the permission of a directory to 0700, rwx------
FILENAME->O_RDONLY means open the file with O_RDONLY
DIRNAME->O_RDONLY | O_DIRECTORY means open the directory with O_RDONLY | O_DIRECTORY)

wasmer version 4.3.1

(1)It should have successfully obtained the file descriptor, but it failed.

DIRNAME->0700
DIRNAME->O_RDONLY | O_DIRECTORY

FILENAME->0600
FILENAME->O_WRONLY

FILENAME->0200
FILENAME->O_WRONLY | O_APPEND

FILENAME->0600
FILENAME->O_WRONLY | O_TRUNC | O_CREAT

FILENAME->0600
FILENAME->O_RDWR | O_CREAT

FILENAME->0600
FILENAME->O_RDWR | O_TRUNC | O_CREAT

FILENAME->0600
FILENAME->O_WRONLY | O_CREAT

DIRNAME->0500
DIRNAME->O_RDONLY | O_DIRECTORY

DIRNAME->0600
DIRNAME->O_RDONLY | O_DIRECTORY

FILENAME->0600
FILENAME->O_WRONLY | O_TRUNC

FILENAME->0600
FILENAME->O_RDWR

FILENAME->0200
FILENAME->O_WRONLY

FILENAME->0200
FILENAME->O_WRONLY | O_TRUNC | O_CREAT

FILENAME->0600
FILENAME->O_WRONLY | O_APPEND

DIRNAME->0400
DIRNAME->O_RDONLY | O_DIRECTORY

FILENAME->0600
FILENAME->O_RDWR | O_APPEND

FILENAME->0200
FILENAME->O_WRONLY | O_CREAT

FILENAME->0600
FILENAME->O_RDONLY

FILENAME->0200
FILENAME->O_WRONLY | O_TRUNC

FILENAME->0600
FILENAME->O_RDWR | O_TRUNC

FILENAME->0400
FILENAME->O_RDONLY

(2)It should not have successfully obtained the file descriptor, but it succeeded.

FILENAME->0400
FILENAME->O_RDWR | O_CREAT

FILENAME->0400
FILENAME->O_WRONLY | O_CREAT

FILENAME->0400
FILENAME->O_RDWR | O_TRUNC | O_CREAT

FILENAME->0200
FILENAME->O_RDWR | O_CREAT

FILENAME->0200
FILENAME->O_RDWR | O_TRUNC | O_CREAT

FILENAME->0400
FILENAME->O_WRONLY | O_TRUNC | O_CREAT

wasmer version 4.2.2

(1)It should have successfully obtained the file descriptor, but it failed.

FILENAME->0400
FILENAME->O_RDONLY

(2)It should not have successfully obtained the file descriptor, but it succeeded.

DIRNAME->0100
DIRNAME->O_RDONLY | O_DIRECTORY

DIRNAME->0300
DIRNAME->O_RDONLY | O_DIRECTORY

DIRNAME->0200
DIRNAME->O_RDONLY | O_DIRECTORY