open() does not fail with ENOENT when it should

[bhaible]

POSIX ​https://pubs.opengroup.org/onlinepubs/9799919799/functions/open.html specifies that the open() function "shall fail" with error code ENOENT if "O_CREAT is set and a component of the path prefix of path does not name an existing file".

This does not work in Haiku hrev57823 (from 2024-07-15): it fails with EINVAL instead.

How to reproduce: Compile and run the attached test program.

gcc -Wall foo.c
./a.out

Expected output:

ret = -1, errno == ENOENT
OK

Actual output:

ret = -1, errno == Invalid Argument
a.out: foo.c:31:main: errno == ENOENT
Kill Thread

[bhaible]

test case foo.c

[waddlesplash]

​https://review.haiku-os.org/c/haiku/+/8621

[waddlesplash]

Fix merged in hrev58376.

[waddlesplash]

Committed the tests for this and #18355 in hrev58379.