* refactor: change dirfd arg of xxxat() to Option<fd>
* changelog
* gate at_rawfd() with features fs or process
* fix import
* fix test on Android
* simplify at_rawfd()
* update changelog
For many of Nix's consumers it be convenient to easily convert a Nix
error into a std::io::Error. That's currently not possible because of
the InvalidPath, InvalidUtf8, and UnsupportedOperation types that have
no equivalent in std::io::Error.
However, very few of Nix's public APIs actually return those unusual
errors. So a more useful API would be for Nix's standard error type to
implement Into<std::io::Error>.
This commit makes Error a simple NewType around Errno. For most
functions it's a drop-in replacement. There are only three exceptions:
* clearenv now returns a bespoke error type. It was the only Nix
function whose error couldn't be cleanly mapped onto an Errno.
* sys::signal::signal now returns Error(Errno::ENOTSUP) instead of
Error::UnsupportedOperation when the user passes an incompatible
argument to `handler`.
* When a NixPath exceeds PATH_MAX, it will now return
Error(Errno::ENAMETOOLONG) instead of Error::InvalidPath.
In the latter two cases there is now some abiguity about whether the
error code was generated by Nix or by the OS. But I think the ambiguity
is worth it for the sake of being able to implement Into<io::Error>.
This commit also introduces Error::Sys() as a migration aid. Previously
that as an enum variant. Now it's a function, but it will work in many
of the same contexts as the original.
Fixes#1155
* Fix race conditions in the tests. Two tests were grabbing a mutex but
immediately dropping it. Thank you, Clippy.
* Remove vestigial Windows support. Remove some code added to support
Windows in 2015. Nix is no longer intended to ever run on Windows.
* Various other minor Clippy lints.
Travis didn't compile check tests on platforms that couldn't run tests
in CI, so they bitrotted. Let's see how bad they are.
Most annoyingly, 32-bit Android defines mode_t as 16 bits, but
stat.st_mode as 32-bits.
* kmod tests must run exclusively, because they load and unload a module
with a constant name.
* A few tests were doing some variant of chdir, but weren't taking the
CWD_MTX.
* The kmod tests read files by path relative to CWD, so they need the
CWD_MTX. But they don't need it exclusively, so convert the CWD_MTX
into an RwLock.
* Tests that do change the cwd need to change it back when they're done.
1) lutimes doesn't exist on OpenBSD so it needs to be under conditional
compilation.
The only "reference" that I could find related to this is the discussion
here: https://github.com/rust-lang/libc/pull/790 .
2) fexecve doesn't exist on OpenBSD so add conditional compilation for it
in unistd and in related tests.
The only "reference" that I could find is a mention that fexecve is
not implemented on OpenBSD in the manual pages for signal(3) and
sigaction(2):
Official repository (search for "fexecve"):
https://cvsweb.openbsd.org/src/lib/libc/sys/sigaction.2?rev=1.75&content-type=text/x-cvsweb-markup
Github mirror:
https://github.com/openbsd/src/blob/master/lib/libc/sys/sigaction.2#L619
3) AIO doesn't work on OpenBSD so put test_aio_drop under conditional
compilation.
4) Add relevant changelog entries.
P.S. On OpenBSD remains the issue of test_scm_rights which builds
correctly but fails at runtime.
PR #944 added wrappers for the more-modern futimens(2) and utimesat(2),
but unfortunately these APIs are not available on old-ish systems.
In particular, macOS Sierra and below don't implement them, making the
new APIs unusable. Whether we should care about such "old" systems is
debatable, but the problem is that, at the moment, this is the only
macOS version usable on Travis to test kexts and, thus, to test FUSE
file systems.
This should have been part of PR #946, which added a wrapper for
utimes(2) following this same rationale, but missed lutimes(2) because
I simply didn't notice it existed.
PR #944 added wrappers for the more-modern futimens(2) and utimesat(2),
but unfortunately these APIs are not available on old-ish systems.
In particular, macOS Sierra and below don't implement them, making the
new APIs unusable. Whether we should care about such "old" systems is
debatable, but the problem is that, at the moment, this is the only
macOS version usable on Travis to test kexts and, thus, to test FUSE
file systems.
On FreeBSD, st_rdev seems to be set to a unique value (correlated with,
but not identical to, st_ino) per file. Neither the FreeBSD nor Linux
man page makes any promises on st_rdev for regular files; useful test
coverage of st_rdev would check it on a special file.
All tests now pass on FreeBSD.
* Fixed an unused_import error in `termios.rs` for Android.
* Fixed undefined references to `preadv` and `pwritev` for Android -
At least they don't exist from API level 3 to 21.
* Fixed the uid > 0 and gid > 0 checks in `stat`'s tests - Running the
tests by root is possible, especially when running on a rooted Android
device.
Those changes made rust-nix buildable (again) on Android. All the tests
passed as well.
