# Changelog
## v0.8.0
* Added set_check_for_hangup() to PollContext.
* Added writable()/has_error()/raw_events() to PollEvent.
* Derived Copy/Clone for PollWatchingEvents.
* Fixed the implementation of `write_zeroes` to use `FALLOC_FL_ZERO_RANGE`
instead of `FALLOC_FL_PUNCH_HOLE`.
* Added `write_all_zeroes` to `WriteZeroes`, which calls `write_zeroes` in a
loop until the requested length is met.
* Added a new trait, `WriteZeroesAt`, which allows giving the offset in file
instead of using the current cursor.
* Removed `max_events` from `Epoll::wait` which removes possible undefined
behavior.
* [[#104](https://github.com/rust-vmm/vmm-sys-util/issues/104)]: Fixed FAM
struct `PartialEq` implementation.
* [[#85](https://github.com/rust-vmm/vmm-sys-util/issues/85)]: Fixed FAM struct
`Clone` implementation.
* [[#99](https://github.com/rust-vmm/vmm-sys-util/issues/99)]: Validate the
maximum capacity when initializing FAM Struct.
# v0.7.0
* Switched to Rust edition 2018.
* Added the `metric` module that provides a `Metric` interface as well as a
default implementation for `AtomicU64`.
# v0.6.1
* Implemented `From<io::Error>` for `errno::Error`.
# v0.6.0
* Derived Copy for EpollEvent.
* Implemented Debug for EpollEvent.
* Changed `Epoll::ctl` signature such that `EpollEvent` is passed by
value and not by reference.
* Enabled this crate to be used on other Unixes (besides Linux) by using
target_os = linux where appropriate.
# v0.5.0
* Added conditionally compiled `serde` compatibility to `FamStructWrapper`,
gated by the `with-serde` feature.
* Implemented `Into<std::io::Error` for `errno::Error`.
* Added a wrapper over `libc::epoll` used for basic epoll operations.
# v0.4.0
* Added Windows support for TempFile and errno::Error.
* Added `into_file` for TempFile which enables the TempFile to be used as a
regular file.
* Implemented std::error::Error for errno::Error.
* Fixed the implementation of `register_signal_handler` by allowing only
valid signal numbers.
# v0.3.1
* Advertise functionality for obtaining POSIX real time signal base which is
needed to provide absolute signals in the API changed in v0.3.0.
# v0.3.0
* Removed `for_vcpu` argument from `signal::register_signal_handler` and
`signal::validate_signal_num`. Users can now pass absolute values for all
valid signal numbers.
* Removed `flag` argument of `signal::register_signal_handler` public methods,
which now defaults to `libc::SA_SIGINFO`.
* Changed `TempFile::new` and `TempDir::new` to create new temporary files/
directories inside `$TMPDIR` if set, otherwise inside `/tmp`.
* Added methods which create temporary files/directories with prefix.
# v0.2.1
* Fixed the FamStructWrapper Clone implementation to avoid UB.
# v0.2.0
* fam: updated the macro that generates implementions of FamStruct to
also take a parameter that specifies the name of the flexible array
member.
# v0.1.1
* Fixed the Cargo.toml license.
* Fixed some clippy warnings.
# v0.1.0
This is the first vmm-sys-util crate release.
It is a collection of modules implementing helpers and utilities used by
multiple rust-vmm components and rust-vmm based VMMs.
Most of the code in this first release is based on either the crosvm or the
Firecracker projects, or both.
The first release comes with the following Rust modules:
* aio: Safe wrapper over
[`Linux AIO`](http://man7.org/linux/man-pages/man7/aio.7.html).
* errno: Structures, helpers, and type definitions for working with
[`errno`](http://man7.org/linux/man-pages/man3/errno.3.html).
* eventfd: Structure and wrapper functions for working with
[`eventfd`](http://man7.org/linux/man-pages/man2/eventfd.2.html).
* fallocate: Enum and function for dealing with an allocated disk space
by [`fallocate`](http://man7.org/linux/man-pages/man2/fallocate.2.html).
* fam: Trait and wrapper for working with C defined FAM structures.
* file_traits: Traits for handling file synchronization and length.
* ioctls: Macros and functions for working with
[`ioctl`](http://man7.org/linux/man-pages/man2/ioctl.2.html).
* poll: Traits and structures for working with
[`epoll`](http://man7.org/linux/man-pages/man7/epoll.7.html)
* rand: Miscellaneous functions related to getting (pseudo) random
numbers and strings.
* seek_hole: Traits and implementations over
[`lseek64`](https://linux.die.net/man/3/lseek64).
* signal: Enums, traits and functions for working with
[`signal`](http://man7.org/linux/man-pages/man7/signal.7.html).
* sockctrl_msg: Wrapper for sending and receiving messages with file
descriptors on sockets that accept control messages (e.g. Unix domain
sockets).
* tempdir: Structure for handling temporary directories.
* tempfile: Struct for handling temporary files as well as any cleanup
required.
* terminal: Trait for working with
[`termios`](http://man7.org/linux/man-pages/man3/termios.3.html).
* timerfd: Structure and functions for working with
[`timerfd`](http://man7.org/linux/man-pages/man2/timerfd_create.2.html).
* write_zeroes: Traits for replacing a range with a hole and writing
zeroes in a file.