Add more from the std

crates/std/src/sys/fs/mod.rs

@@ -0,0 +1,173 @@
+#![deny(unsafe_op_in_unsafe_fn)]
+
+use crate::io;
+use crate::path::{Path, PathBuf};
+
+pub mod common;
+
+cfg_select! {
+    any(target_family = "unix", target_os = "wasi") => {
+        mod unix;
+        use unix as imp;
+        #[cfg(not(target_os = "wasi"))]
+        pub use unix::{chown, fchown, lchown, mkfifo};
+        #[cfg(not(any(target_os = "fuchsia", target_os = "wasi")))]
+        pub use unix::chroot;
+        #[cfg(not(target_os = "wasi"))]
+        pub(crate) use unix::debug_assert_fd_is_open;
+        #[cfg(any(target_os = "linux", target_os = "android"))]
+        pub(super) use unix::CachedFileMetadata;
+        use crate::sys::helpers::run_path_with_cstr as with_native_path;
+    }
+    target_os = "windows" => {
+        mod windows;
+        use windows as imp;
+        pub use windows::{symlink_inner, junction_point};
+        use crate::sys::path::with_native_path;
+    }
+    target_os = "hermit" => {
+        mod hermit;
+        use hermit as imp;
+    }
+    target_os = "motor" => {
+        mod motor;
+        use motor as imp;
+    }
+    target_os = "solid_asp3" => {
+        mod solid;
+        use solid as imp;
+    }
+    target_os = "uefi" => {
+        mod uefi;
+        use uefi as imp;
+    }
+    target_os = "vexos" => {
+        mod vexos;
+        use vexos as imp;
+    }
+    _ => {
+        mod unsupported;
+        use unsupported as imp;
+    }
+}
+
+// FIXME: Replace this with platform-specific path conversion functions.
+#[cfg(not(any(target_family = "unix", target_os = "windows", target_os = "wasi")))]
+#[inline]
+pub fn with_native_path<T>(path: &Path, f: &dyn Fn(&Path) -> io::Result<T>) -> io::Result<T> {
+    f(path)
+}
+
+pub use imp::{
+    Dir, DirBuilder, DirEntry, File, FileAttr, FilePermissions, FileTimes, FileType, OpenOptions,
+    ReadDir,
+};
+
+pub fn read_dir(path: &Path) -> io::Result<ReadDir> {
+    // FIXME: use with_native_path on all platforms
+    imp::readdir(path)
+}
+
+pub fn remove_file(path: &Path) -> io::Result<()> {
+    with_native_path(path, &imp::unlink)
+}
+
+pub fn rename(old: &Path, new: &Path) -> io::Result<()> {
+    with_native_path(old, &|old| with_native_path(new, &|new| imp::rename(old, new)))
+}
+
+pub fn remove_dir(path: &Path) -> io::Result<()> {
+    with_native_path(path, &imp::rmdir)
+}
+
+pub fn remove_dir_all(path: &Path) -> io::Result<()> {
+    // FIXME: use with_native_path on all platforms
+    #[cfg(not(windows))]
+    return imp::remove_dir_all(path);
+    #[cfg(windows)]
+    with_native_path(path, &imp::remove_dir_all)
+}
+
+pub fn read_link(path: &Path) -> io::Result<PathBuf> {
+    with_native_path(path, &imp::readlink)
+}
+
+pub fn symlink(original: &Path, link: &Path) -> io::Result<()> {
+    // FIXME: use with_native_path on all platforms
+    #[cfg(windows)]
+    return imp::symlink(original, link);
+    #[cfg(not(windows))]
+    with_native_path(original, &|original| {
+        with_native_path(link, &|link| imp::symlink(original, link))
+    })
+}
+
+pub fn hard_link(original: &Path, link: &Path) -> io::Result<()> {
+    with_native_path(original, &|original| {
+        with_native_path(link, &|link| imp::link(original, link))
+    })
+}
+
+pub fn metadata(path: &Path) -> io::Result<FileAttr> {
+    with_native_path(path, &imp::stat)
+}
+
+pub fn symlink_metadata(path: &Path) -> io::Result<FileAttr> {
+    with_native_path(path, &imp::lstat)
+}
+
+pub fn set_permissions(path: &Path, perm: FilePermissions) -> io::Result<()> {
+    with_native_path(path, &|path| imp::set_perm(path, perm.clone()))
+}
+
+#[cfg(all(unix, not(target_os = "vxworks")))]
+pub fn set_permissions_nofollow(path: &Path, perm: crate::fs::Permissions) -> io::Result<()> {
+    use crate::fs::OpenOptions;
+
+    let mut options = OpenOptions::new();
+
+    // ESP-IDF and Horizon do not support O_NOFOLLOW, so we skip setting it.
+    // Their filesystems do not have symbolic links, so no special handling is required.
+    #[cfg(not(any(target_os = "espidf", target_os = "horizon")))]
+    {
+        use crate::os::unix::fs::OpenOptionsExt;
+        options.custom_flags(libc::O_NOFOLLOW);
+    }
+
+    options.open(path)?.set_permissions(perm)
+}
+
+#[cfg(any(not(unix), target_os = "vxworks"))]
+pub fn set_permissions_nofollow(_path: &Path, _perm: crate::fs::Permissions) -> io::Result<()> {
+    crate::unimplemented!(
+        "`set_permissions_nofollow` is currently only implemented on Unix platforms"
+    )
+}
+
+pub fn canonicalize(path: &Path) -> io::Result<PathBuf> {
+    with_native_path(path, &imp::canonicalize)
+}
+
+pub fn copy(from: &Path, to: &Path) -> io::Result<u64> {
+    // FIXME: use with_native_path on all platforms
+    #[cfg(not(windows))]
+    return imp::copy(from, to);
+    #[cfg(windows)]
+    with_native_path(from, &|from| with_native_path(to, &|to| imp::copy(from, to)))
+}
+
+pub fn exists(path: &Path) -> io::Result<bool> {
+    // FIXME: use with_native_path on all platforms
+    #[cfg(not(windows))]
+    return imp::exists(path);
+    #[cfg(windows)]
+    with_native_path(path, &imp::exists)
+}
+
+pub fn set_times(path: &Path, times: FileTimes) -> io::Result<()> {
+    with_native_path(path, &|path| imp::set_times(path, times.clone()))
+}
+
+pub fn set_times_nofollow(path: &Path, times: FileTimes) -> io::Result<()> {
+    with_native_path(path, &|path| imp::set_times_nofollow(path, times.clone()))
+}