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#[cfg(any(unix, target_os = "vxworks"))]
use crate::fs::PermissionsExt;
use std::{fs, io};
/// Representation of the various permissions on a file.
///
/// This corresponds to [`std::fs::Permissions`].
///
/// [`std::fs::Permissions`]: https://doc.rust-lang.org/std/fs/struct.Permissions.html
///
/// <details>
/// We need to define our own version because the libstd `Permissions` doesn't have
/// a public constructor that we can use.
/// </details>
#[derive(Debug, Clone, Eq, PartialEq)]
pub struct Permissions {
pub(crate) readonly: bool,
#[cfg(any(unix, target_os = "vxworks"))]
pub(crate) ext: PermissionsExt,
}
impl Permissions {
/// Constructs a new instance of `Self` from the given `std::fs::Permissions`.
#[inline]
pub fn from_std(std: fs::Permissions) -> Self {
Self {
readonly: std.readonly(),
#[cfg(any(unix, target_os = "vxworks"))]
ext: PermissionsExt::from_std(std),
}
}
/// Consumes `self` and produces a new instance of `std::fs::Permissions`.
///
/// <details>
/// The `file` parameter works around the fact that we can't construct a
/// `Permissions` object ourselves on Windows.
/// </details>
#[inline]
pub fn into_std(self, file: &fs::File) -> io::Result<fs::Permissions> {
self._into_std(file)
}
#[cfg(unix)]
#[inline]
#[allow(clippy::unnecessary_wraps)]
fn _into_std(self, _file: &fs::File) -> io::Result<fs::Permissions> {
use std::os::unix::fs::PermissionsExt;
Ok(fs::Permissions::from_mode(self.ext.mode()))
}
#[cfg(windows)]
#[inline]
fn _into_std(self, file: &fs::File) -> io::Result<fs::Permissions> {
let mut permissions = file.metadata()?.permissions();
permissions.set_readonly(self.readonly());
Ok(permissions)
}
/// Returns `true` if these permissions describe a readonly (unwritable) file.
///
/// This corresponds to [`Permissions::readonly`].
///
/// [`std::fs::Permissions::readonly`]: https://doc.rust-lang.org/std/fs/struct.Permissions.html#method.readonly
#[inline]
pub fn readonly(&self) -> bool {
self.readonly
}
/// Modifies the readonly flag for this set of permissions.
///
/// This corresponds to [`Permissions::set_readonly`].
///
/// [`std::fs::Permissions::set_readonly`]: https://doc.rust-lang.org/std/fs/struct.Permissions.html#method.set_readonly
#[inline]
pub fn set_readonly(&mut self, readonly: bool) {
self.readonly = readonly;
#[cfg(any(unix, target_os = "vxworks"))]
self.ext.set_readonly(readonly);
}
}
#[cfg(unix)]
impl std::os::unix::fs::PermissionsExt for Permissions {
#[inline]
fn mode(&self) -> u32 {
self.ext.mode()
}
#[inline]
fn set_mode(&mut self, mode: u32) {
self.ext.set_mode(mode)
}
#[inline]
fn from_mode(mode: u32) -> Self {
Self {
readonly: PermissionsExt::readonly(mode as libc::mode_t),
ext: PermissionsExt::from_mode(mode),
}
}
}
#[cfg(target_os = "vxworks")]
impl std::os::unix::fs::PermissionsExt for Permissions {
#[inline]
fn mode(&self) -> u32 {
self.ext.mode()
}
#[inline]
fn set_mode(&mut self, mode: u32) {
self.ext.set_mode(mode)
}
#[inline]
fn from_mode(mode: u32) -> Self {
Self {
readonly: PermissionsExt::readonly(mode),
ext: PermissionsExt::from(mode),
}
}
}