chore(deps): Update Rust crate nix to 0.31

[renovate]

ℹ️ Note

This PR body was truncated due to platform limits.

This PR contains the following updates:

Package	Type	Update	Change
nix	dependencies	minor	0.30 → 0.31

---

Release Notes

nix-rust/nix (nix)

v0.31.1

Compare Source

Added

• termios: Add definition for IUCLC to supported platforms
  (#​2702)
• termios: Add definition for XCASE for supported platforms
  (#​2703)

v0.31.0

Compare Source

Added

• Added the UDP GSO/GRO socket options and CMsgs on Android. This includes the
  following types:

  • UdpGsoSegment
  • UdpGroSegment
  • ControlMessage::UdpGsoSegments
  • ControlMessageOwned::UdpGroSegments

  (#​2666)

• Define errno EWOULDBLOCK as an alias of EAGAIN to match the AIX libc
  definition. (#​2692)

• Enable module ifaddrs on GNU Hurd
  (#​2697)

• Add termios OutputFlags::OFILL for Linux, Android, Aix, Cygwin, Fuchsia,
  Haiku,
  GNU/Hurd, Nto, Redox, Illumos, Solaris and Apple OSes.
  (#​2701)

• add sync() for cygwin (#​2708)

Changed

• changed EpollEvent methods to be const
  (#​2656)
• Bumped libc to
  0.2.180
  (#​2724)

Fixed

• Fixed nix::sys::ptrace::syscall_info, which was not setting the data
  argument properly, causing garbage values to be returned.
  (#​2653)
• Cast the 'addr' argument of 'madvise()' to '*mut u8' on AIX to match the
  signature in the AIX libc.
  (#​2655)
• Fixed the Dir module on NTO, Solaris, Hurd, and possibly other platforms.
  The
  d_name field was not copied correctly on those platforms. For some other
  platforms, it could be copied incorrectly for files with very long pathnames.
  (#​2674)
• Fix the build on Illumos (#​2694)

Removed

• Removed Eq and PartialEq implementations from SigHandler, because they
  never worked reliably. The suggested alternative is matches!. For
  example:

  let h: SigHandler = ...
  if matches!(h, SigHandler::SigIgn) {
      ...
  }
  ``` ([#​2642](https://redirect.github.com/nix-rust/nix/pull/2642))
  

• Removed IFF_NOTRAILERS by NetBSD, as it has been removed upstream and from
  libc (#​2724)

[0.30.1] - 2025-05-04

Fixed

• doc.rs build
  (#​2634)

[0.30.0] - 2025-04-29

Added

• Add socket option IPV6_PKTINFO for BSDs/Linux/Android, also
  IPV6_RECVPKTINFO for DragonFlyBSD
  (#​2113)
• Add fcntl's F_PREALLOCATE constant for Apple targets.
  (#​2393)
• Improve support for extracting the TTL / Hop Limit from incoming packets
  and support for DSCP (ToS / Traffic Class).
  (#​2425)
• Add socket option IP_TOS (nix::sys::socket::sockopt::IpTos) IPV6_TCLASS
  (nix::sys::socket::sockopt::Ipv6TClass) on Android/FreeBSD
  (#​2464)
• Add SeekData and SeekHole to Whence for hurd and apple targets
  (#​2473)
• Add From trait implementation between SocketAddr and Sockaddr,
  Sockaddr6 (#​2474)
• Added wrappers for posix_spawn API
  (#​2475)
• Add the support for Emscripten.
  (#​2477)
• Add fcntl constant F_RDADVISE for Apple target
  (#​2480)
• Add fcntl constant F_RDAHEAD for Apple target
  (#​2482)
• Add F_LOG2PHYS and F_LOG2PHYS_EXT for Apple target
  (#​2483)
• MAP_SHARED_VALIDATE was added for all linux targets. & MAP_SYNC was added
  for linux with the exclusion of mips architecures, and uclibc
  (#​2499)
• Add getregs()/getregset()/setregset() for Linux/musl/aarch64
  (#​2502)
• Add FcntlArgs F_TRANSFEREXTENTS constant for Apple targets
  (#​2504)
• Add MapFlags::MAP_STACK in sys::man for netbsd
  (#​2526)
• Add support for libc::LOCAL_PEERTOKEN in getsockopt.
  (#​2529)
• Add support for syslog, openlog, closelog on all unix.
  (#​2537)
• Add the TCP_FUNCTION_BLK sockopt, on FreeBSD.
  (#​2539)
• Implements Into<OwnedFd> for PtyMaster/Fanotify/Inotify/SignalFd/TimerFd
  (#​2548)
• Add MremapFlags::MREMAP_DONTUNMAP to sys::mman::mremap for linux target.
  (#​2555)
• Added sockopt_impl! to the public API. It's now possible for users to
  define
  their own sockopts without needing to make a PR to Nix.
  (#​2556)
• Add the TCP_FUNCTION_ALIAS sockopt, on FreeBSD.
  (#​2558)
• Add sys::mman::MmapAdvise MADV_PAGEOUT, MADV_COLD, MADV_WIPEONFORK,
  MADV_KEEPONFORK for Linux and Android targets
  (#​2559)
• Add socket protocol Sctp, as well as MSG_NOTIFICATION for non-Android
  Linux targets. (#​2562)
• Added from_owned_fd constructor to EventFd
  (#​2563)
• Add sys::mman::MmapAdvise MADV_POPULATE_READ, MADV_POPULATE_WRITE for
  Linux and Android targets
  (#​2565)
• Added from_owned_fd constructor to
  PtyMaster/Fanotify/Inotify/SignalFd/TimerFd
  (#​2566)
• Added FcntlArg::F_READAHEAD for FreeBSD target
  (#​2569)
• Added sockopt::LingerSec for Apple targets
  (#​2572)
• Added sockopt::EsclBind for solarish targets
  (#​2573)
• Exposed the std::os::fd::AsRawFd trait method for
  nix::sys::fanotify::Fanotify struct
  (#​2575)
• Add support for syslog's setlogmask on all unix.
  (#​2579)
• Added Fuchsia support for ioctl.
  (#​2580)
• Add sys::socket::SockProtocol::EthIp,
  sys::socket::SockProtocol::EthIpv6,
  sys::socket::SockProtocol::EthLoop
  (#​2581)
• Add OpenHarmony target into CI and Update documents.
  (#​2599)
• Added the TcpMaxSeg setsockopt option for apple targets
  (#​2603)
• Add FilAttach and FilDetach to socket::sockopt for Illumos
  (#​2611)
• Add PeerPidfd (SO_PEERPIDFD) to socket::sockopt for Linux
  (#​2620)
• Added socket::sockopt::AttachReusePortCbpf for Linux
  (#​2621)
• Add ptrace::syscall_info for linux/glibc
  (#​2627)

Changed

• Module sys/signal now adopts I/O safety
  (#​1936)
• Change the type of the name argument of memfd_create() from &CStr to
  <P: NixPath>(name: &P) (#​2431)
• Public interfaces in fcntl.rs and dir.rs now use I/O-safe types.
  (#​2434)
• Module sys/stat now adopts I/O safety.
  (#​2439)
• Module unistd now adopts I/O safety.
  (#​2440)
• Module sys/fanotify now adopts I/O safety
  (#​2443)
• Socket option IpTos has been renamed to Ipv4Tos, the old symbol is
  deprecated since 0.30.0 (#​2465)
• Rename Flags EventFlag to EvFlags, and MemFdCreateFlag to MFdFlags
  (#​2476)
• Made nix::sys::socket::UnknownCmsg public and more readable
  (#​2520)
• recvmsg: take slice for cmsg_buffer instead of Vec
  (#​2524)
• linkat: allow distinct types for path arguments
  (#​2582)

Fixed

• Disable unsupported signals on sparc-linux
  (#​2454)
• Fix cmsg_len() return type on OpenHarmony
  (#​2456)
• The ns argument of sys::prctl::set_timerslack() should be of type
  c_ulong (#​2505)
• Properly exclude NUL characters from OSStrings returned by getsockopt.
  (#​2557)
• Fixes the build on OpenHarmony
  (#​2587)

Removed

• Type SigevNotify is no longer PartialEq, Eq and Hash due to the use
  of BorrowedFd (#​1936)
• EventFd::defuse() is removed because it does nothing, EventFd::arm() is
  also removed for symmetry reasons.
  (#​2452)
• Removed the Copy trait from PollFd
  (#​2631)

[0.29.0] - 2024-05-24

Added

• Add getregset()/setregset() for Linux/glibc/x86/x86_64/aarch64/riscv64 and
  getregs()/setregs() for Linux/glibc/aarch64/riscv64
  (#​2044)
• Add socket option Ipv6Ttl for apple targets.
  (#​2287)
• Add socket option UtunIfname.
  (#​2325)
• make SigAction repr(transparent) & can be converted to the libc raw type
  (#​2326)
• Add From trait implementation for conversions between sockaddr_in and
  SockaddrIn, sockaddr_in6 and SockaddrIn6
  (#​2328)
• Add socket option ReusePortLb for FreeBSD.
  (#​2332)
• Added support for openat2 on linux.
  (#​2339)
• Add if_indextoname function.
  (#​2340)
• Add mount and unmount API for apple targets.
  (#​2347)
• Added _PC_MIN_HOLE_SIZE for pathconf and fpathconf.
  (#​2349)
• Added impl AsFd for pty::PtyMaster
  (#​2355)
• Add open flag O_SEARCH to AIX, Empscripten, FreeBSD, Fuchsia, solarish,
  WASI (#​2374)
• Add prctl function prctl_set_vma_anon_name for Linux/Android.
  (#​2378)
• Add sync(2) for apple_targets/solarish/haiku/aix/hurd, syncfs(2) for
  hurd and fdatasync(2) for aix/hurd
  (#​2379)
• Add fdatasync support for Apple targets.
  (#​2380)
• Add fcntl::OFlag::O_PATH for FreeBSD and Fuchsia
  (#​2382)
• Added PathconfVar::MIN_HOLE_SIZE for apple_targets.
  (#​2388)
• Add open flag O_SEARCH to apple_targets
  (#​2391)
• O_DSYNC may now be used with aio_fsync and fcntl on FreeBSD.
  (#​2404)
• Added Flock::relock for upgrading and downgrading locks.
  (#​2407)

Changed

• Change the ForkptyResult type to the following repr so that the
  uninitialized
  master field won't be accessed in the child process:

  pub enum ForkptyResult {
      Parent {
          child: Pid,
          master: OwnedFd,
      },
      Child,
  }
  ``` ([#​2315](https://redirect.github.com/nix-rust/nix/pull/2315))

• Updated cfg_aliases dependency from version 0.1 to 0.2
  (#​2322)

• Change the signature of ptrace::write and ptrace::write_user to make them
  safe (#​2324)

• Allow use of SignalFd through shared reference

  Like with many other file descriptors, concurrent use of signalfds is safe.
  Changing the signal mask of and reading signals from a signalfd can now be
  done
  with the SignalFd API even if other references to it exist.
  (#​2367)

• Changed tee, splice and vmsplice RawFd arguments to AsFd.
  (#​2387)

• Added I/O safety to the sys/aio module. Most functions that previously
  accepted a AsRawFd argument now accept an AsFd instead.
  (#​2401)

• RecvMsg::cmsgs() now returns a Result, and checks that cmsgs were not
  truncated. (#​2413)

Fixed

• No longer panics when the fanotify queue overflows.
  (#​2399)
• Fixed ControlMessageOwned::UdpGroSegments wrapped type from u16 to i32 to
  reflect the used kernel's one.
  (#​2406)

[0.28.0] - 2024-02-24

Added

• Added mkdtemp wrapper (#​1297)

• Add associated constants UTIME_OMIT UTIME_NOW for TimeSpec
  (#​1879)

• Added EventFd type. (#​1945)

• • Added impl From<Signal> for SigSet.
  • Added impl std::ops::BitOr for SigSet.
  • Added impl std::ops::BitOr for Signal.
  • Added impl std::ops::BitOr<Signal> for SigSet

  (#​1959)

• Added TlsGetRecordType control message type and corresponding enum for
  linux (#​2065)

• Added Ipv6HopLimit to ::nix::sys::socket::ControlMessage for Linux,
  MacOS, FreeBSD, DragonflyBSD, Android, iOS and Haiku.
  (#​2074)

• Added Icmp and IcmpV6 to SockProtocol
  (#​2103)

• Added rfork support for FreeBSD in unistd
  (#​2121)

• Added MapFlags::map_hugetlb_with_size_log2 method for Linux targets
  (#​2125)

• Added mmap_anonymous function
  (#​2127)

• Added mips32r6 and mips64r6 support for signal, ioctl and ptrace
  (#​2138)

• Added F_GETPATH FcntlFlags entry on Apple/NetBSD/DragonflyBSD for
  ::nix::fcntl. (#​2142)

• Added F_KINFO FcntlFlags entry on FreeBSD for ::nix::fcntl.
  (#​2152)

• Added F_GETPATH_NOFIRMLINK and F_BARRIERFSYNC FcntlFlags entry
  on Apple for ::nix::fcntl.
  (#​2155)

• Added newtype Flock to automatically unlock a held flock upon drop.
  Added Flockable trait to represent valid types for Flock.
  (#​2170)

• Added SetSockOpt impls to enable Linux Kernel TLS on a TCP socket and to
  import TLS parameters. (#​2175)

• • Added the ::nix::sys::socket::SocketTimestamp enum for configuring the
    TsClock (a.k.a SO_TS_CLOCK) sockopt
  • Added FreeBSD's ScmRealtime and ScmMonotonic as new options in
    ::nix::sys::socket::ControlMessageOwned

  (#​2187)

• Added new fanotify API: wrappers for fanotify_init and fanotify_mark
  (#​2194)

• Added SpecialCharacterindices support for haiku.
  (#​2195)

• Added sys::sendfile support for solaris/illumos.
  (#​2198)

• impl Display for InterfaceFlags
  (#​2206)

• Added sendfilev in sys::sendfile for solarish
  (#​2207)

• Added fctrl::SealFlag::F_SEAL_FUTURE_WRITE
  (#​2213)

• Added Ipv6MulticastHops as socket option to set and read.
  (#​2234)

• Enable ControlMessageOwned::Ipv4RecvIf and
  ControlMessageOwned::Ipv4RecvDstAddr for DragonFlyBSD
  (#​2240)

• ClockId::set_time() and time::clock_settime() are now enabled on macOS
  (#​2241)

• Added IpBindAddressNoPort sockopt to support IP_BIND_ADDRESS_NO_PORT
  available on linux. (#​2244)

• Enable MapFlags::map_hugetlb_with_size_log2 method for Android/Fuchsia
  (#​2245)

• Added TcpFastOpenConnect sockopt to support TCP_FASTOPEN_CONNECT
  available on linux. (#​2247)

• Add reboot(2) for OpenBSD/NetBSD
  (#​2251)

• Added new MemFdCreateFlag constants to sys::memfd on Linux and Android
  related to hugetlbfs support.
  (#​2252)

• Expose the inner fd of Kqueue through:

  • impl AsFd for Kqueue
  • impl From<Kqueue> for OwnedFd

  (#​2258)

• Added sys::eventfd support on FreeBSD
  (#​2259)

• Added MmapFlags::MAP_FIXED constant in sys::mman for netbsd and openbsd
  (#​2260)

• Added the SO_LISTENQLIMIT sockopt.
  (#​2263)

• Enable the AT_EMPTY_PATH flag for the fchownat() function
  (#​2267)

• Add AtFlags::AT_EMPTY_PATH for FreeBSD and Hurd
  (#​2270)

• Enable `OFlag::O_DIRECTORY for Solarish
  (#​2275)

• Added the Backlog wrapper type for the listen call.
  (#​2276)

• Add clock_nanosleep() (#​2277)

• Enabled O_DIRECT in fcntl::OFlags for solarish
  (#​2278)

• Added a new API sigsuspend.
  (#​2279)

• • Added errno::Errno::set function
  • Added errno::Errno::set_raw function
  • Added errno::Errno::last_raw function
  • Added errno::Errno::from_raw function

  (#​2283)

• Enable the AT_EMPTY_PATH flag for the linkat() function
  (#​2284)

• Enable unistd::{sync, syncfs} for Android
  (#​2296)

Changed

• poll now takes PollTimeout replacing libc::c_int.
  (#​1876)

• Deprecated sys::eventfd::eventfd.
  (#​1945)

• mmap, mmap_anonymous, munmap, mremap, madvise, msync, mprotect,
  munlock and mlock updated to use NonNull.
  (#​2000)

• mmap function now accepts F instead of Option<F>
  (#​2127)

• PollFd::new now takes a BorrowedFd argument, with relaxed lifetime
  requirements relative to the previous version.
  (#​2134)

• FdSet::{insert, remove, contains} now take BorrowedFd arguments, and have
  relaxed lifetime requirements relative to 0.27.1.
  (#​2136)

• The following APIs now take an implementation of AsFd rather than a
  RawFd:

  • unistd::tcgetpgrp
  • unistd::tcsetpgrp
  • unistd::fpathconf
  • unistd::ttyname
  • unistd::getpeereid (#​2137)

• Changed openat() and Dir::openat(), now take optional dirfds
  (#​2139)

• The MSRV is now 1.69 (#​2144)

• Changed function SockaddrIn::ip() to return net::Ipv4Addr and refactored
  SocketAddrV6::ip() to be const
  (#​2151)

• The following APIs now take optional dirfds:

  • readlinkat()
  • fstatat()
  • mknodat()
  • mkdirat()
  • execveat()

  (#​2157)

• Epoll::wait now takes EpollTimeout replacing isize.
  (#​2202)

• • Deprecated errno::errno() function (use Errno::last_raw())
  • Deprecated errno::from_i32() function (use Errno::from_raw())
  • Deprecated errno::Errno::from_i32() function (use Errno::from_raw())

  (#​2283)

Fixed

• Fix SigSet incorrect implementation of Eq, PartialEq and Hash
  (#​1946)
• Fixed ::sys::socket::sockopt::IpMulticastTtl by fixing the value of optlen
  passed to libc::setsockopt and added tests.
  (#​2072)
• Fixed the function signature of recvmmsg, potentially causing UB
  (#​2119)
• Fix SignalFd::set_mask. In 0.27.0 it would actually close the file
  descriptor. (#​2141)
• Fixed UnixAddr::new for haiku, it did not record the sun_len value as
  needed.
  Fixed sys::socket::addr::from_raw_parts and
  sys::socket::Sockaddrlike::len build for solaris.
  (#​2242)
• Fixed solaris build globally.
  (#​2248)
• Changed the dup3 wrapper to perform a real call to dup3 instead of
  emulating it via dup2 and fcntl to get rid of race condition
  (#​2268)
• Fixed ::unistd::Group::members using read_unaligned to avoid crash on
  misaligned pointers (#​2311)

Removed

• The FchownatFlags type has been deprecated, please use AtFlags instead.
  (#​2267)
• Removed the dup3 wrapper on macOS, which was emulated via dup2 and
  fcntl and could cause a race condition. The dup3 system call is not
  supported on macOS. (#​2268)
• The LinkatFlags type has been deprecated, please use AtFlags instead.
  (#​2284)

[0.27.1] - 2023-08-28

Fixed

• Fixed generating the documentation on docs.rs.
  (#​2111)

[0.27.0] - 2023-08-28

Added

• Added AT_EACCESS to AtFlags on all platforms but android
  (#​1995)
• Add PF_ROUTE to SockType on macOS, iOS, all of the BSDs, Fuchsia, Haiku, Illumos.
  (#​1867)
• Added nix::ucontext module on aarch64-unknown-linux-gnu.
  (#1662)
• Added CanRaw to SockProtocol and CanBcm as a separate SocProtocol constant.
  (#​1912)
• Added Generic and NFLOG to SockProtocol.
  (#​2092)
• Added mq_timedreceive to ::nix::mqueue.
  ([#​1966])(#​1966)
• Added LocalPeerPid to nix::sys::socket::sockopt for macOS. (#​1967)
• Added TFD_TIMER_CANCEL_ON_SET to ::nix::sys::time::TimerSetTimeFlags on Linux and Android.
  (#​2040)
• Added SOF_TIMESTAMPING_OPT_ID and SOF_TIMESTAMPING_OPT_TSONLY to nix::sys::socket::TimestampingFlag.
  (#​2048)
• Enabled socket timestamping options on Android. (#​2077)
• Added vsock support for macOS (#​2056)
• Added SO_SETFIB and SO_USER_COOKIE to nix::sys::socket::sockopt for FreeBSD.
  (#​2085)
• Added SO_RTABLE for OpenBSD and SO_ACCEPTFILTER for FreeBSD/NetBSD to nix::sys::socket::sockopt.
  (#​2085)
• Added MSG_WAITFORONE to MsgFlags on Android, Fuchsia, Linux, NetBSD,
  FreeBSD, OpenBSD, and Solaris.
  (#​2014)
• Added SO_TS_CLOCK for FreeBSD to nix::sys::socket::sockopt.
  (#​2093)
• Added support for prctl in Linux.
  (#1550)
• nix::socket and nix::select are now available on Redox.
  (#​2012)
• Implemented AsFd, AsRawFd, FromRawFd, and IntoRawFd for mqueue::MqdT.
  (#​2097)
• Add the ability to set kevent_flags on SigEvent.
  (#​1731)

Changed

• All Cargo features have been removed from the default set. Users will need to
  specify which features they depend on in their Cargo.toml.
  (#​2091)

• Implemented I/O safety for many, but not all, of Nix's APIs. Many public
  functions argument and return types have changed:

  Original Type	New Type
  AsRawFd	AsFd
  RawFd	BorrowedFd or OwnedFd

  (#1906)

• Use I/O safety with copy_file_range, and expose it on FreeBSD.
  (#1906)

• The MSRV is now 1.65
  (#​1862)
  (#​2104)

• The epoll interface now uses a type.
  (#​1882)

• With I/O-safe type applied in pty::OpenptyResult and pty::ForkptyResult,
  users no longer need to manually close the file descriptors in these types.
  (#​1921)

• Refactored name parameter of mq_open and mq_unlink to be generic over
  NixPath.
  (#​2102).

• Made clone unsafe, like fork.
  (#​1993)

Removed

• sys::event::{kevent, kevent_ts} are deprecated in favor of
  sys::kevent::Kqueue::kevent, and sys::event::kqueue is deprecated in
  favor of sys::kevent::Kqueue::new.
  (#​1943)
• Removed deprecated IoVec API.
  (#​1855)
• Removed deprecated net APIs.
  (#​1861)
• nix::sys::signalfd::signalfd is deprecated. Use
  nix::sys::signalfd::SignalFd instead.
  (#​1938)
• Removed SigEvent support on Fuchsia, where it was unsound.
  (#​2079)
• Removed flock from ::nix::fcntl on Solaris.
  (#​2082)

[0.26.3] - 2023-08-27

Fixed

• Fix: send ETH_P_ALL in htons format
  (#​1925)
• Fix: recvmsg now sets the length of the received sockaddr_un field
  correctly on Linux platforms. (#​2041)
• Fix potentially invalid conversions in
  SockaddrIn::from<std::net::SocketAddrV4>,
  SockaddrIn6::from<std::net::SockaddrV6>, IpMembershipRequest::new, and
  Ipv6MembershipRequest::new with future Rust versions.
  (#​2061)
• Fixed an incorrect lifetime returned from recvmsg.
  (#​2095)

[0.26.2] - 2023-01-18

Fixed

• Fix SockaddrIn6 bug that was swapping flowinfo and scope_id byte
  ordering.
  (#​1964)

[0.26.1] - 2022-11-29

Fixed

• Fix UB with sys::socket::sockopt::SockType using SOCK_PACKET.
  (#​1821)

[0.26.0] - 2022-11-29

Added

• Added SockaddrStorage::{as_unix_addr, as_unix_addr_mut}
  (#​1871)
• Added MntFlags and unmount on all of the BSDs.
• Added any() and all() to poll::PollFd.
  (#​1877)
• Add MntFlags and unmount on all of the BSDs.
  (#​1849)
• Added a Statfs::flags method.
  (#​1849)
• Added NSFS_MAGIC FsType on Linux and Android.
  (#​1829)
• Added sched_getcpu on platforms that support it.
  (#​1825)
• Added sched_getaffinity and sched_setaffinity on FreeBSD.
  (#​1804)
• Added line_discipline field to Termios on Linux, Android and Haiku
  (#​1805)
• Expose the memfd module on FreeBSD (memfd was added in FreeBSD 13)
  (#​1808)
• Added domainname field of UtsName on Android and Linux
  (#​1817)
• Re-export RLIM_INFINITY from libc
  (#​1831)
• Added syncfs(2) on Linux
  (#​1833)
• Added faccessat(2) on illumos
  (#​1841)
• Added eaccess() on FreeBSD, DragonFly and Linux (glibc and musl).
  (#​1842)
• Added IP_TOS SO_PRIORITY and IPV6_TCLASS sockopts for Linux
  (#​1853)
• Added new_unnamed and is_unnamed for UnixAddr on Linux and Android.
  (#​1857)
• Added SockProtocol::Raw for raw sockets
  (#​1848)
• added IP_MTU (IpMtu) IPPROTO_IP sockopt on Linux and Android.
  (#​1865)

Changed

• The MSRV is now 1.56.1
  (#​1792)
• The addr argument of sys::mman::mmap is now of type Option<NonZeroUsize>.
  (#​1870)
• The length argument of sys::mman::mmap is now of type NonZeroUsize.
  (#​1873)

Fixed

• Fixed using SockaddrStorage to store a Unix-domain socket address on Linux.
  (#​1871)
• Fix microsecond calculation for TimeSpec.
  (#​1801)
• Fix User::from_name and Group::from_name panicking
  when given a name containing a nul.
  (#​1815)
• Fix User::from_uid and User::from_name crash on Android platform.
  (#​1824)
• Workaround XNU bug causing netmasks returned by getifaddrs to misbehave.
  (#​1788)

Removed

• Removed deprecated error constants and conversions.
  (#​1860)

[0.25.0] - 2022-08-13

Added

• Added faccessat
  (#​1780)
• Added memfd on Android.
  (#1773)
• Added ETH_P_ALL to SockProtocol enum
  (#1768)
• Added four non-standard Linux SysconfVar variants
  (#1761)
• Added const constructors for TimeSpec and TimeVal
  (#1760)
• Added chflags.
  (#1758)
• Added aio_writev and aio_readv.
  (#1713)
• impl From<uid_t> for Uid and From<gid_t> for Gid
  (#1727)
• impl From<SockaddrIn> for std::net::SocketAddrV4 and
  impl From<SockaddrIn6> for std::net::SocketAddrV6.
  (#1711)
• Added support for the x86_64-unknown-haiku target.
  (#1703)
• Added ptrace::read_user and ptrace::write_user for Linux.
  (#1697)
• Added getrusage and helper types UsageWho and Usage
  (#1747)
• Added the DontRoute SockOpt
  (#1752)
• Added signal::SigSet::from_sigset_t_unchecked().
  (#1741)
• Added the Ipv4OrigDstAddr sockopt and control message.
  (#1772)
• Added the Ipv6OrigDstAddr sockopt and control message.
  (#1772)
• Added the Ipv4SendSrcAddr control message.
  (#1776)

Changed

• Reimplemented sendmmsg/recvmmsg to avoid allocations and with better API
  (#1744)

• Rewrote the aio module. The new module:

  • Does more type checking at compile time rather than runtime.
  • Gives the caller control over whether and when to Box an aio operation.
  • Changes the type of the priority arguments to i32.
  • Changes the return type of aio_return to usize.
    (#1713)

• nix::poll::ppoll: sigmask parameter is now optional.
  (#1739)

• Changed gethostname to return an owned OsString.
  (#1745)

• signal:SigSet is now marked as repr(transparent).
  (#1741)

Removed

• Removed support for resubmitting partially complete lio_listio operations.
  It was too complicated, and didn't fit Nix's theme of zero-cost abstractions.
  Instead, it can be reimplemented downstream.
  (#1713)

[0.24.2] - 2022-07-17

Fixed

• Fixed buffer overflow in nix::sys::socket::recvfrom.
  (#1763)
• Enabled SockaddrStorage::{as_link_addr, as_link_addr_mut} for Linux-like
  operating systems.
  (#1729)
• Fixed SockaddrLike::from_raw implementations for VsockAddr and
  SysControlAddr.
  (#1736)

[0.24.1] - 2022-04-22

Fixed

• Fixed UnixAddr::size on Linux-based OSes.
  (#1702)

[0.24.0] - 2022-04-21

Added

• Added fine-grained features flags. Most Nix functionality can now be
  conditionally enabled. By default, all features are enabled.
  (#1611)
• Added statfs FS type magic constants for target_os = "android"
  and synced constants with libc v0.2.121.
  (#1690)
• Added fexecve on DragonFly.
  (#1577)
• sys::uio::IoVec is now Send and Sync
  (#1582)
• Added EPOLLEXCLUSIVE on Android.
  (#1567)
• Added fdatasync for FreeBSD, Fuchsia, NetBSD, and OpenBSD.
  (#1581)
• Added sched_setaffinity and sched_getaffinity on DragonFly.
  (#1537)
• Added posix_fallocate on DragonFly.
  (#1621)
• Added SO_TIMESTAMPING support
  (#1547)
• Added getter methods to MqAttr struct
  (#1619)
• Added the TxTime sockopt and control message.
  (#1564)
• Added POSIX per-process timer support
  (#1622)
• Added sendfile on DragonFly.
  (#1615)
• Added UMOUNT_NOFOLLOW, FUSE_SUPER_MAGIC on Linux.
  (#1634)
• Added getresuid, setresuid, getresgid, and setresgid on DragonFly, FreeBSD, and OpenBSD.
  (#1628)
• Added MAP_FIXED_NOREPLACE on Linux.
  (#1636)
• Added fspacectl on FreeBSD
  (#1640)
• Added accept4 on DragonFly, Emscripten, Fuchsia, Illumos, and NetBSD.
  (#1654)
• Added AsRawFd implementation on OwningIter.
  (#1563)
• Added process_vm_readv and process_vm_writev on Android.
  (#1557)
• Added nix::ucontext module on s390x.
  (#1662)
• Implemented Extend, FromIterator, and IntoIterator for SigSet and
  added SigSet::iter and SigSetIter.
  (#1553)
• Added ENOTRECOVERABLE and EOWNERDEAD error codes on DragonFly.
  (#1665)
• Implemented Read and Write for &PtyMaster
  (#1664)
• Added MSG_NOSIGNAL for Android, Dragonfly, FreeBSD, Fuchsia, Haiku, Illumos, Linux, NetBSD, OpenBSD and Solaris.
  (#1670)
• Added waitid.
  (#1584)
• Added Ipv6DontFrag for android, iOS, linux and macOS.
• Added IpDontFrag for iOS, macOS.
  (#1692)

Changed

• mqueue functions now operate on a distinct type, nix::mqueue::MqdT.
  Accessors take this type by reference, not by value.
  (#1639)
• Removed SigSet::extend in favor of <SigSet as Extend<Signal>>::extend.
  Because of this change, you now need use std::iter::Extend to call extend
  on a SigSet.
  (#1553)
• Removed the the PATH_MAX restriction from APIs accepting paths. Paths
  will now be allocated on the heap if they are too long. In addition, large
  instruction count improvements (~30x) were made to path handling.
  (#1656)
• Changed getrlimit and setrlimit to use rlim_t directly
  instead of Option<rlim_t>.
  (#1668)
• Deprecated InetAddr and SockAddr in favor of SockaddrIn, SockaddrIn6,
  and SockaddrStorage.
  (#1684)
• Deprecated IpAddr, Ipv4Addr, and Ipv6Addr in favor of their equivalents
  from the standard library.
  (#1685)
• uname now returns a Result<UtsName> instead of just a UtsName and
  ignoring failures from libc. And getters on the UtsName struct now return
  an &OsStr instead of &str.
  (#1672)
• Replaced IoVec with IoSlice and IoSliceMut, and replaced IoVec::from_slice with
  IoSlice::new. (#1643)

Fixed

• InetAddr::from_std now sets the sin_len/sin6_len fields on the BSDs.
  (#1642)
• Fixed a panic in LinkAddr::addr. That function now returns an Option.
  (#1675)
  (#1677)

Removed

• Removed public access to the inner fields of NetlinkAddr, AlgAddr,
  SysControlAddr, LinkAddr, and VsockAddr.
  (#1614)
• Removed EventFlag::EV_SYSFLAG.
  (#1635)

[0.23.1] - 2021-12-16

Changed

• Relaxed the bitflags requirement from 1.3.1 to 1.1. This partially reverts
  #​1492. From now on, the MSRV is not guaranteed to work with all versions of
  all dependencies, just with some version of all dependencies.
  (#1607)

Fixed

• Fixed soundness issues in FdSet::insert, FdSet::remove, and
  FdSet::contains involving file descriptors outside of the range
  0..FD_SETSIZE.
  (#1575)

[0.23.0] - 2021-09-28

Added

• Added the LocalPeerCred sockopt.
  (#1482)
• Added TimeSpec::from_duration and TimeSpec::from_timespec
  (#1465)
• Added IPV6_V6ONLY sockopt.
  (#1470)
• Added impl From<User> for libc::passwd trait implementation to convert a User
  into a libc::passwd. Consumes the User struct to give ownership over
  the member pointers.
  (#1471)
• Added pthread_kill.
  (#1472)
• Added mknodat.
  (#1473)
• Added setrlimit and getrlimit.
  (#1302)
• Added ptrace::interrupt method for platforms that support PTRACE_INTERRUPT
  (#1422)
• Added IP6T_SO_ORIGINAL_DST sockopt.
  (#1490)
• Added the PTRACE_EVENT_STOP variant to the sys::ptrace::Event enum
  (#1335)
• Exposed SockAddr::from_raw_sockaddr
  (#1447)
• Added TcpRepair
  (#1503)
• Enabled pwritev and preadv for more operating systems.
  (#1511)
• Added support for TCP_MAXSEG TCP Maximum Segment Size socket options
  (#1292)
• Added Ipv4RecvErr and Ipv6RecvErr sockopts and associated control messages.
  (#1514)
• Added AsRawFd implementation on PollFd.
  (#1516)
• Added Ipv4Ttl and Ipv6Ttl sockopts.
  (#1515)
• Added MAP_EXCL, MAP_ALIGNED_SUPER, and MAP_CONCEAL mmap flags, and
  exposed MAP_ANONYMOUS for all operating systems.
  (#1522)
  (#1525)
  (#1531)
  (#1534)
• Added read/write accessors for 'events' on PollFd.
  (#1517)

Changed

• FdSet::{contains, highest, fds} no longer require a mutable reference.
  (#1464)
• User::gecos and corresponding libc::passwd::pw_gecos are supported on
  64-bit Android, change conditional compilation to include the field in
  64-bit Android builds
  (#1471)
• eventfds are supported on Android, change conditional compilation to
  include sys::eventfd::eventfd and sys::eventfd::EfdFlagsfor Android
  builds.
  (#1481)
• Most enums that come from C, for example Errno, are now marked as
  #[non_exhaustive].
  (#1474)
• Many more functions, mostly contructors, are now const.
  (#1476)
  (#1492)
• sys::event::KEvent::filter now returns a Result instead of being
  infalliable. The only cases where it will now return an error are cases
  where it previously would've had undefined behavior.
  (#1484)
• Minimum supported Rust version is now 1.46.0.
  (#​1492)
• Rework UnixAddr to encapsulate internals better in order to fix soundness
  issues. No longer allows creating a UnixAddr from a raw sockaddr_un.
  (#​1496)
• Raised bitflags to 1.3.0 and the MSRV to 1.46.0.
  (#​1492)

Fixed

• posix_fadvise now returns errors in the conventional way, rather than as a
  non-zero value in Ok().
  (#1538)
• Added more errno definitions for better backwards compatibility with
  Nix 0.21.0.
  (#1467)
• Fixed potential undefined behavior in Signal::try_from on some platforms.
  (#1484)
• Fixed buffer overflow in unistd::getgrouplist.
  (#1545)

Removed

• Removed a couple of termios constants on redox that were never actually
  supported.
  (#1483)
• Removed nix::sys::signal::NSIG. It was of dubious utility, and not correct
  for all platforms.
  (#1484)
• Removed support for 32-bit Apple targets, since they've been dropped by both
  Rustc and Xcode.
  (#1492)
• Deprecated SockAddr/InetAddr::to_str in favor of ToString::to_string
  (#1495)
• Removed SigevNotify on OpenBSD and Redox.
  (#1511)

[0.22.3] - 22 January 2022

Changed

• Relaxed the bitflags requirement from 1.3.1 to 1.1. This partially reverts
  #​1492. From now on, the MSRV is not guaranteed to work with all versions of
  all dependencies, just with some version of all dependencies.
  (#1607)

[0.22.2] - 28 September 2021

Fixed

• Fixed buffer overflow in unistd::getgrouplist.
  (#1545)
• Added more errno definitions for better backwards compatibility with
  Nix 0.21.0.
  (#1467)

[0.22.1] - 13 August 2021

Fixed

• Locked bitflags to < 1.3.0 to fix the build with rust < 1.46.0.

Removed

• Removed a couple of termios constants on redox that were never actually
  supported.
  (#1483)

[0.22.0] - 9 July 2021

Added

• Added if_nameindex (#1445)
• Added nmount for FreeBSD.
  (#1453)
• Added IpFreebind socket option (sockopt) on Linux, Fuchsia and Android.
  (#1456)
• Added TcpUserTimeout socket option (sockopt) on Linux and Fuchsia.
  (#1457)
• Added renameat2 for Linux
  (#1458)
• Added RxqOvfl support on Linux, Fuchsia and Android.
  (#1455)

Changed

• ptsname_r now returns a lossily-converted string in the event of bad UTF,
  just like ptsname.
  (#​1446)
• Nix's error type is now a simple wrapper around the platform's Errno. This
  means it is now Into<std::io::Error>. It's also Clone, Copy, Eq, and
  has a small fixed size. It also requires less typing. For example, the old
  enum variant nix::Error::Sys(nix::errno::Errno::EINVAL) is now simply
  nix::Error::EINVAL.
  (#​1446)

[0.21.2] - 29 September 2021

Fixed

• Fixed buffer overflow in unistd::getgrouplist.
  (#1545)

[0.21.1] - 13 August 2021

Fixed

• Locked bitflags to < 1.3.0 to fix the build with rust < 1.46.0.

Removed

• Removed a couple of termios constants on redox that were never actually
  supported.
  (#1483)

[0.21.0] - 31 May 2021

Added

• Added getresuid and getresgid
  (#1430)
• Added TIMESTAMPNS support for linux
  (#1402)
• Added sendfile64 (#1439)
• Added MS_LAZYTIME to MsFlags
  (#1437)

Changed

• Made forkpty unsafe, like fork
  (#1390)
• Made Uid, Gid and Pid methods from_raw and as_raw a const fn
  (#1429)
• Made Uid::is_root a const fn
  (#1429)
• AioCb is now always pinned. Once a libc::aiocb gets sent to the kernel,
  its address in memory must not change. Nix now enforces that by using
  std::pin. Most users won't need to change anything, except when using
  aio_suspend. See that method's documentation for the new usage.
  (#1440)
• LioCb is now constructed using a distinct `LioCbBu

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