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The nix::sys::mman::mmap documentation says
> Calls to mmap are inherently unsafe, so they must be made in an unsafe
block.
however, the function was not actually marked unsafe.
* `munmap` should also be `unsafe` for obvious reasons.
* `madvise` should be `unsafe` because of the MADV_DONTNEED flag.
* `mlock` was already marked `unsafe`
* `munlock` and `msync` don't strictly need to be `unsafe` despite
taking pointers AFAICT, but are marked `unsafe` for consistency and in
case they add additional flags in the future.
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revents is an output field so regardless of what value it is set to it
will be overwritten by many of the function calls that take a PollFd.
The only value that makes sense for the caller to pass in in
`EventFlags::empty()` so we just hardcode that instead of making the
caller do it.
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This allows importing them directly from `nix::fcntl` which is more
ergonomic than needing to use them via `FcntlArg`.
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Improve AIO API
- Turn most `aio_*` functions into `AioCb` methods
- Add runtime checks to `AioCb` methods
- Implement `Drop` for `AioCb`
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Add ppoll()
This will currently fail CI, as the necessary changes haven't hit libc yet. That is tracked in rust-lang/libc#537. This does build on my computer using the changes tracked on that PR, so I'd appreciate any visual review of this code as it should be "done".
I also wanted to get this submitted so hopefully it'd be in the queue for the 0.8 release.
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Remove EPOLLWAKEUP and SIGEV_THREAD_ID when cross-compiling to MIPS.
With this nix builds for mipsel-unknown-linux-gnu.
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Added BaudRate enum for termios
Issue #514
Does not provide `BaudRate::EXTA` or `BaudRate::EXTB` constants. These seem to alias to `B19200` and `B38400` respectively and so break the 1:1 mapping needed by `From`. I don't know their historic use.
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This is possible now that EPOLLEXCLUSIVE was added to libc in
https://github.com/rust-lang/libc/pull/526
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Also, fix style bug in AIO tests
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New baud constants landed in rust-lang/libc#530, we'll use them.
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Issue #514
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Fix the style for bitflags!
Prefer `libc_bitflags!` over `bitflags!`. Prefer `libc::CONSTANTS` over
writing the constant manually.
This makes #501 unnecessary, since upstream now contains the `O_TMPFILE` constant.
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Fix unresolved name error when building with musl.
See: https://git.musl-libc.org/cgit/musl/tree/src/time/timer_create.c#n126
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Prefer libc_bitflags! over bitflags!. Prefer libc::CONSTANTS over
writing the constant manually.
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Implement major/minor macros, correct mkdev
It appears that the previous `mkdev` was based on the kernel headers (https://github.com/torvalds/linux/blob/v4.7/include/linux/kdev_t.h#L6) which (I guess) is the internal kernel dev_t. Scrolling down the file you can see some bitshifting operations to do conversions.
The new implementation(s) are based on [musl](http://git.musl-libc.org/cgit/musl/tree/include/sys/sysmacros.h?id=dbbb3734d8c0176feabd6c46e2e85bbc3b8a60af) and [glibc](https://github.molgen.mpg.de/git-mirror/glibc/blob/20003c49884422da7ffbc459cdeee768a6fee07b/sysdeps/unix/sysv/linux/sys/sysmacros.h#L38), which are in agreement about how dev_t should be handled.
(as it happens I suspect we could omit the shift by 32 since I don't see that in the kernel headers, but doesn't hurt to take the conservative route and mimic the libcs)
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wait: Support ptrace events for Linux
Adds new WaitStatus value `PtraceEvent`. Implementation of #273 that only affects Linux/Android.
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If an AioCb has any in-kernel state, AioCb.drop will print a warning and
wait for it to complete.
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Prevent immutable buffers from being used with aio_read or lio_listio
with LIO_READ. AioCb.from_slice no longer needs to be unsafe.
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Add POSIX AIO support
POSIX AIO is a standard for asynchronous file I/O. Read, write, and
fsync operations can all take place in the background, with completion
notification delivered by a signal, by a new thread, by kqueue, or not
at all.
The SigEvent class, used for AIO notifications among other things, is
also added.
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This introduces a wrapper for fchdir(2), allowing a process to change
directory based on an open file descriptor.
The underlying function is available in libc crate since 0.2.20.
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Baed on discussions on the related PR, sethostname now takes
an `S: AsRef<OsStr>` in order to allow for a greater range of inputs
that allow for a more fluid interface.
Signed-off-by: Paul Osborne <osbpau@gmail.com>
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Previously gethostname just mutated a buffer. We now provide
a slightly more usable (but still allocation free) API that ensures
that the returned buffer is NUL-terminated. We give back a `&CStr`
instead of requiring that the user do all of the conversions from
`&[u8]` when we know we are dealing with a `&CStr`.
Signed-off-by: Paul Osborne <osbpau@gmail.com>
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Although the underlying C API does take a pointer to a set of
characters, it is a requirement of almost every operating system
that these bytes not contain a premature NUL character or other
special characters. In other words, you want a `&str`. Changing
this to make the API make a bit more sense.
Signed-off-by: Paul Osborne <osbpau@gmail.com>
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fix #480 and add simple test cases for that.
r? @fiveop
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Fix ControlMessage::encode_into when encoding multiple messages
copy_bytes updates dst so that it points after the bytes that were just
copied into it. encode_into did not advance the buffer in the same way
when encoding the data.
See #473
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fix build for eventfd feature
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Always use libc's socketaddr_storage
Since rust-lang/rust#23425 is closed, we no longer need the special
case.
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