Function os_open

crates/vm/src/stdlib/os.rs:245–278

(
        name: OsPath,
        flags: i32,
        mode: Option<i32>,
        dir_fd: DirFd<'_, { OPEN_DIR_FD as usize }>,
        vm: &VirtualMachine,
    )

    #[cfg(any(unix, windows, target_os = "wasi"))]
    pub(crate) fn os_open(
        name: OsPath,
        flags: i32,
        mode: Option<i32>,
        dir_fd: DirFd<'_, { OPEN_DIR_FD as usize }>,
        vm: &VirtualMachine,
    ) -> PyResult<crt_fd::Owned> {
        let mode = mode.unwrap_or(0o777);
        #[cfg(windows)]
        let fd = {
            let [] = dir_fd.0;
            let name = name.to_wide_cstring(vm)?;
            let flags = flags | libc::O_NOINHERIT;
            crt_fd::wopen(&name, flags, mode)
        };
        #[cfg(not(windows))]
        let fd = {
            let name = name.clone().into_cstring(vm)?;
            #[cfg(not(target_os = "wasi"))]
            let flags = flags | libc::O_CLOEXEC;
            #[cfg(not(target_os = "redox"))]
            if let Some(dir_fd) = dir_fd.get_opt() {
                crt_fd::openat(dir_fd, &name, flags, mode)
            } else {
                crt_fd::open(&name, flags, mode)
            }
            #[cfg(target_os = "redox")]
            {
                let [] = dir_fd.0;
                crt_fd::open(&name, flags, mode)
            }
        };
        fd.map_err(|err| OSErrorBuilder::with_filename_from_errno(&err, name, vm))
    }

    #[pyfunction]
    fn fsync(fd: crt_fd::Borrowed<'_>) -> io::Result<()> {