Fix miscellaneous clippy lints. (#893)

* Fix miscellaneous clippy lints.

* Fix unused import warnings.

src/backend/libc/mount/types.rs

@@ -92,7 +92,7 @@ bitflags! {
     #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
     pub struct FsOpenFlags: c::c_uint {
         /// `FSOPEN_CLOEXEC`
-        const FSOPEN_CLOEXEC = 0x00000001;
+        const FSOPEN_CLOEXEC = 0x0000_0001;
 
         /// <https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags>
         const _ = !0;
@@ -109,7 +109,7 @@ bitflags! {
     #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
     pub struct FsMountFlags: c::c_uint {
         /// `FSMOUNT_CLOEXEC`
-        const FSMOUNT_CLOEXEC = 0x00000001;
+        const FSMOUNT_CLOEXEC = 0x0000_0001;
 
         /// <https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags>
         const _ = !0;
@@ -157,37 +157,37 @@ bitflags! {
     #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
     pub struct MountAttrFlags: c::c_uint {
         /// `MOUNT_ATTR_RDONLY`
-        const MOUNT_ATTR_RDONLY = 0x00000001;
+        const MOUNT_ATTR_RDONLY = 0x0000_0001;
 
         /// `MOUNT_ATTR_NOSUID`
-        const MOUNT_ATTR_NOSUID = 0x00000002;
+        const MOUNT_ATTR_NOSUID = 0x0000_0002;
 
         /// `MOUNT_ATTR_NODEV`
-        const MOUNT_ATTR_NODEV = 0x00000004;
+        const MOUNT_ATTR_NODEV = 0x0000_0004;
 
         /// `MOUNT_ATTR_NOEXEC`
-        const MOUNT_ATTR_NOEXEC = 0x00000008;
+        const MOUNT_ATTR_NOEXEC = 0x0000_0008;
 
         /// `MOUNT_ATTR__ATIME`
-        const MOUNT_ATTR__ATIME = 0x00000070;
+        const MOUNT_ATTR__ATIME = 0x0000_0070;
 
         /// `MOUNT_ATTR_RELATIME`
-        const MOUNT_ATTR_RELATIME = 0x00000000;
+        const MOUNT_ATTR_RELATIME = 0x0000_0000;
 
         /// `MOUNT_ATTR_NOATIME`
-        const MOUNT_ATTR_NOATIME = 0x00000010;
+        const MOUNT_ATTR_NOATIME = 0x0000_0010;
 
         /// `MOUNT_ATTR_STRICTATIME`
-        const MOUNT_ATTR_STRICTATIME = 0x00000020;
+        const MOUNT_ATTR_STRICTATIME = 0x0000_0020;
 
         /// `MOUNT_ATTR_NODIRATIME`
-        const MOUNT_ATTR_NODIRATIME = 0x00000080;
+        const MOUNT_ATTR_NODIRATIME = 0x0000_0080;
 
         /// `MOUNT_ATTR_NOUSER`
-        const MOUNT_ATTR_IDMAP = 0x00100000;
+        const MOUNT_ATTR_IDMAP = 0x0010_0000;
 
         /// `MOUNT_ATTR__ATIME_FLAGS`
-        const MOUNT_ATTR_NOSYMFOLLOW = 0x00200000;
+        const MOUNT_ATTR_NOSYMFOLLOW = 0x0020_0000;
 
         /// `MOUNT_ATTR__ATIME_FLAGS`
         const MOUNT_ATTR_SIZE_VER0 = 32;
@@ -207,32 +207,32 @@ bitflags! {
     #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
     pub struct MoveMountFlags: c::c_uint {
         /// `MOVE_MOUNT_F_EMPTY_PATH`
-        const MOVE_MOUNT_F_SYMLINKS = 0x00000001;
+        const MOVE_MOUNT_F_SYMLINKS = 0x0000_0001;
 
         /// `MOVE_MOUNT_F_AUTOMOUNTS`
-        const MOVE_MOUNT_F_AUTOMOUNTS = 0x00000002;
+        const MOVE_MOUNT_F_AUTOMOUNTS = 0x0000_0002;
 
         /// `MOVE_MOUNT_F_EMPTY_PATH`
-        const MOVE_MOUNT_F_EMPTY_PATH = 0x00000004;
+        const MOVE_MOUNT_F_EMPTY_PATH = 0x0000_0004;
 
         /// `MOVE_MOUNT_T_SYMLINKS`
-        const MOVE_MOUNT_T_SYMLINKS = 0x00000010;
+        const MOVE_MOUNT_T_SYMLINKS = 0x0000_0010;
 
         /// `MOVE_MOUNT_T_AUTOMOUNTS`
-        const MOVE_MOUNT_T_AUTOMOUNTS = 0x00000020;
+        const MOVE_MOUNT_T_AUTOMOUNTS = 0x0000_0020;
 
         /// `MOVE_MOUNT_T_EMPTY_PATH`
-        const MOVE_MOUNT_T_EMPTY_PATH = 0x00000040;
+        const MOVE_MOUNT_T_EMPTY_PATH = 0x0000_0040;
 
         /// `MOVE_MOUNT__MASK`
-        const MOVE_MOUNT_SET_GROUP = 0x00000100;
+        const MOVE_MOUNT_SET_GROUP = 0x0000_0100;
 
         // TODO: add when linux 6.5 is released
         // /// `MOVE_MOUNT_BENEATH`
-        // const MOVE_MOUNT_BENEATH = 0x00000200;
+        // const MOVE_MOUNT_BENEATH = 0x0000_0200;
 
         /// `MOVE_MOUNT__MASK`
-        const MOVE_MOUNT__MASK = 0x00000377;
+        const MOVE_MOUNT__MASK = 0x0000_0377;
 
         /// <https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags>
         const _ = !0;
@@ -281,16 +281,16 @@ bitflags! {
     #[derive(Copy, Clone, Eq, PartialEq, Hash, Debug)]
     pub struct FsPickFlags: c::c_uint {
         /// `FSPICK_CLOEXEC`
-        const FSPICK_CLOEXEC = 0x00000001;
+        const FSPICK_CLOEXEC = 0x0000_0001;
 
         /// `FSPICK_SYMLINK_NOFOLLOW`
-        const FSPICK_SYMLINK_NOFOLLOW = 0x00000002;
+        const FSPICK_SYMLINK_NOFOLLOW = 0x0000_0002;
 
         /// `FSPICK_NO_AUTOMOUNT`
-        const FSPICK_NO_AUTOMOUNT = 0x00000004;
+        const FSPICK_NO_AUTOMOUNT = 0x0000_0004;
 
         /// `FSPICK_EMPTY_PATH`
-        const FSPICK_EMPTY_PATH = 0x00000008;
+        const FSPICK_EMPTY_PATH = 0x0000_0008;
 
         /// <https://docs.rs/bitflags/latest/bitflags/#externally-defined-flags>
         const _ = !0;

src/backend/libc/termios/syscalls.rs

@@ -144,9 +144,9 @@ pub(crate) fn tcsetattr(
         // linux-raw-sys' ioctl-generation script for sparc isn't working yet,
         // so as a temporary workaround, declare these manually.
         #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
-        const TCSETS: u32 = 0x80245409;
+        const TCSETS: u32 = 0x8024_5409;
         #[cfg(any(target_arch = "sparc", target_arch = "sparc64"))]
-        const TCSETS2: u32 = 0x802c540d;
+        const TCSETS2: u32 = 0x802c_540d;
 
         // Translate from `optional_actions` into an ioctl request code. On
         // MIPS, `optional_actions` already has `TCGETS` added to it.

src/backend/linux_raw/param/auxv.rs

@@ -165,7 +165,7 @@ static ENTRY: AtomicUsize = AtomicUsize::new(0);
 #[cfg(feature = "alloc")]
 fn pr_get_auxv() -> crate::io::Result<Vec<u8>> {
     use super::super::conv::{c_int, pass_usize, ret_usize};
-    const PR_GET_AUXV: c::c_int = 0x41555856;
+    const PR_GET_AUXV: c::c_int = 0x4155_5856;
     let mut buffer = alloc::vec![0u8; 512];
     let len = unsafe {
         ret_usize(syscall_always_asm!(

src/fs/at.rs

@@ -12,12 +12,12 @@ use crate::fs::Access;
 use crate::fs::AtFlags;
 #[cfg(apple)]
 use crate::fs::CloneFlags;
-#[cfg(not(any(apple, target_os = "espidf", target_os = "vita", target_os = "wasi")))]
-use crate::fs::FileType;
 #[cfg(linux_kernel)]
 use crate::fs::RenameFlags;
 #[cfg(not(any(target_os = "aix", target_os = "espidf")))]
 use crate::fs::Stat;
+#[cfg(not(any(apple, target_os = "espidf", target_os = "vita", target_os = "wasi")))]
+use crate::fs::{Dev, FileType};
 #[cfg(not(any(target_os = "espidf", target_os = "wasi")))]
 use crate::fs::{Gid, Uid};
 use crate::fs::{Mode, OFlags};
@@ -33,8 +33,6 @@ use {
 #[cfg(not(any(target_os = "espidf", target_os = "vita")))]
 use {crate::fs::Timestamps, crate::timespec::Nsecs};
 
-pub use backend::fs::types::{Dev, RawMode};
-
 /// `UTIME_NOW` for use with [`utimensat`].
 ///
 /// [`utimensat`]: crate::fs::utimensat

src/fs/constants.rs

@@ -3,17 +3,5 @@
 use crate::backend;
 
 pub use crate::io::FdFlags;
-#[cfg(not(any(target_os = "espidf", target_os = "vita")))]
-pub use backend::fs::types::Access;
-pub use backend::fs::types::{Dev, Mode, OFlags};
-
-#[cfg(not(any(target_os = "espidf", target_os = "redox")))]
-pub use backend::fs::types::AtFlags;
-
-#[cfg(apple)]
-pub use backend::fs::types::{CloneFlags, CopyfileFlags};
-
-#[cfg(linux_kernel)]
-pub use backend::fs::types::*;
-
 pub use crate::timespec::{Nsecs, Secs, Timespec};
+pub use backend::fs::types::*;

src/fs/fadvise.rs

@@ -1,7 +1,6 @@
 use crate::{backend, io};
 use backend::fd::AsFd;
-
-pub use backend::fs::types::Advice;
+use backend::fs::types::Advice;
 
 /// `posix_fadvise(fd, offset, len, advice)`—Declares an expected access
 /// pattern for a file.

src/fs/fcntl.rs

@@ -65,7 +65,7 @@ pub fn fcntl_get_seals<Fd: AsFd>(fd: Fd) -> io::Result<SealFlags> {
 }
 
 #[cfg(any(linux_kernel, target_os = "freebsd", target_os = "fuchsia"))]
-pub use backend::fs::types::SealFlags;
+use backend::fs::types::SealFlags;
 
 /// `fcntl(fd, F_ADD_SEALS)`
 ///

src/fs/fcopyfile.rs

@@ -1,9 +1,7 @@
 use crate::fs::CopyfileFlags;
 use crate::{backend, io};
 use backend::fd::AsFd;
-
-/// `copyfile_state_t`
-pub use backend::fs::types::copyfile_state_t;
+use backend::fs::types::copyfile_state_t;
 
 /// `fcopyfile(from, to, state, flags)`
 ///

src/fs/fd.rs

@@ -7,10 +7,6 @@ use crate::fs::{Gid, Uid};
 use crate::fs::{OFlags, SeekFrom, Timespec};
 use crate::{backend, io};
 use backend::fd::{AsFd, BorrowedFd};
-
-#[cfg(not(any(target_os = "espidf", target_os = "vita", target_os = "wasi")))]
-pub use backend::fs::types::FlockOperation;
-
 #[cfg(not(any(
     netbsdlike,
     solarish,
@@ -21,10 +17,17 @@ pub use backend::fs::types::FlockOperation;
     target_os = "redox",
     target_os = "vita",
 )))]
-pub use backend::fs::types::FallocateFlags;
-
-pub use backend::fs::types::Stat;
-
+use backend::fs::types::FallocateFlags;
+#[cfg(not(any(
+    target_os = "espidf",
+    target_os = "solaris",
+    target_os = "vita",
+    target_os = "wasi"
+)))]
+use backend::fs::types::FlockOperation;
+#[cfg(linux_kernel)]
+use backend::fs::types::FsWord;
+use backend::fs::types::Stat;
 #[cfg(not(any(
     solarish,
     target_os = "espidf",
@@ -35,13 +38,9 @@ pub use backend::fs::types::Stat;
     target_os = "vita",
     target_os = "wasi",
 )))]
-pub use backend::fs::types::StatFs;
-
+use backend::fs::types::StatFs;
 #[cfg(not(any(target_os = "haiku", target_os = "redox", target_os = "wasi")))]
-pub use backend::fs::types::{StatVfs, StatVfsMountFlags};
-
-#[cfg(linux_kernel)]
-pub use backend::fs::types::FsWord;
+use backend::fs::types::StatVfs;
 
 /// Timestamps used by [`utimensat`] and [`futimens`].
 ///

src/fs/memfd_create.rs

@@ -1,7 +1,6 @@
 use crate::fd::OwnedFd;
 use crate::{backend, io, path};
-
-pub use backend::fs::types::MemfdFlags;
+use backend::fs::types::MemfdFlags;
 
 /// `memfd_create(path, flags)`
 ///

src/fs/mod.rs

@@ -28,12 +28,11 @@ mod fcntl_apple;
 #[cfg(apple)]
 mod fcopyfile;
 pub(crate) mod fd;
-mod file_type;
 #[cfg(apple)]
 mod getpath;
 #[cfg(not(target_os = "wasi"))] // WASI doesn't have get[gpu]id.
 mod id;
-#[cfg(not(target_os = "wasi"))]
+#[cfg(linux_kernel)]
 mod ioctl;
 #[cfg(not(any(
     target_os = "espidf",
@@ -90,19 +89,18 @@ pub use dir::{Dir, DirEntry};
     target_os = "redox",
     target_os = "vita",
 )))]
-pub use fadvise::{fadvise, Advice};
+pub use fadvise::fadvise;
 pub use fcntl::*;
 #[cfg(apple)]
 pub use fcntl_apple::*;
 #[cfg(apple)]
 pub use fcopyfile::*;
 pub use fd::*;
-pub use file_type::FileType;
 #[cfg(apple)]
 pub use getpath::getpath;
 #[cfg(not(target_os = "wasi"))]
 pub use id::*;
-#[cfg(not(target_os = "wasi"))]
+#[cfg(linux_kernel)]
 pub use ioctl::*;
 #[cfg(not(any(
     target_os = "espidf",
@@ -113,7 +111,7 @@ pub use ioctl::*;
 )))]
 pub use makedev::*;
 #[cfg(any(linux_kernel, target_os = "freebsd"))]
-pub use memfd_create::{memfd_create, MemfdFlags};
+pub use memfd_create::memfd_create;
 #[cfg(linux_kernel)]
 #[cfg(feature = "fs")]
 pub use mount::*;
@@ -125,7 +123,7 @@ pub use seek_from::SeekFrom;
 #[cfg(target_os = "linux")]
 pub use sendfile::sendfile;
 #[cfg(linux_kernel)]
-pub use statx::{statx, Statx, StatxFlags, StatxTimestamp};
+pub use statx::statx;
 #[cfg(not(any(
     target_os = "espidf",
     target_os = "redox",

src/fs/statx.rs

@@ -3,8 +3,7 @@
 use crate::fd::AsFd;
 use crate::fs::AtFlags;
 use crate::{backend, io, path};
-
-pub use backend::fs::types::{Statx, StatxFlags, StatxTimestamp};
+use backend::fs::types::{Statx, StatxFlags};
 
 #[cfg(feature = "linux_4_11")]
 use backend::fs::syscalls::statx as _statx;

src/ioctl/patterns.rs

@@ -6,6 +6,7 @@ use crate::backend::c;
 use crate::io::Result;
 
 use core::marker::PhantomData;
+use core::ptr::addr_of_mut;
 use core::{fmt, mem};
 
 /// Implements an `ioctl` with no real arguments.
@@ -144,7 +145,7 @@ unsafe impl<Opcode: CompileTimeOpcode, Input> Ioctl for Setter<Opcode, Input> {
     const OPCODE: self::Opcode = Opcode::OPCODE;
 
     fn as_ptr(&mut self) -> *mut c::c_void {
-        &mut self.input as *mut Input as *mut c::c_void
+        addr_of_mut!(self.input).cast::<c::c_void>()
     }
 
     unsafe fn output_from_ptr(_: IoctlOutput, _: *mut c::c_void) -> Result<Self::Output> {

src/lib.rs

@@ -120,8 +120,12 @@
 // It is common in Linux and libc APIs for types to vary between platforms.
 #![allow(clippy::useless_conversion)]
 // Redox and WASI have enough differences that it isn't worth precisely
-// conditionalizing all the `use`s for them.
-#![cfg_attr(any(target_os = "redox", target_os = "wasi"), allow(unused_imports))]
+// conditionalizing all the `use`s for them. Similar for if we don't have
+// "all-apis".
+#![cfg_attr(
+    any(target_os = "redox", target_os = "wasi", not(feature = "all-apis")),
+    allow(unused_imports)
+)]
 
 #[cfg(all(feature = "alloc", not(feature = "rustc-dep-of-std")))]
 extern crate alloc;

src/maybe_polyfill/no_std/net/mod.rs

@@ -1,5 +1,6 @@
 mod ip_addr;
 mod socket_addr;
 
+#[allow(unused_imports)]
 pub use self::ip_addr::{IpAddr, Ipv4Addr, Ipv6Addr, Ipv6MulticastScope};
 pub use self::socket_addr::{SocketAddr, SocketAddrV4, SocketAddrV6};