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author | Alan Somers <asomers@gmail.com> | 2021-06-06 10:43:02 -0600 |
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committer | Alan Somers <asomers@gmail.com> | 2021-07-07 20:49:28 -0600 |
commit | 6511d02414ec9dd4bcaa237336c5f74869e6c41a (patch) | |
tree | 61e6cde2230efb026e9ac9c6a6e786cb6ba77642 /test/sys/test_aio.rs | |
parent | f90033ed35af02f39d4eaf28eff85f226c10d91b (diff) | |
download | nix-6511d02414ec9dd4bcaa237336c5f74869e6c41a.zip |
Overhaul Nix's error types
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
Diffstat (limited to 'test/sys/test_aio.rs')
-rw-r--r-- | test/sys/test_aio.rs | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/test/sys/test_aio.rs b/test/sys/test_aio.rs index 254d771b..f1d9a3b1 100644 --- a/test/sys/test_aio.rs +++ b/test/sys/test_aio.rs @@ -177,7 +177,7 @@ fn test_aio_suspend() { let cbbuf = [wcb.as_ref(), rcb.as_ref()]; let r = aio_suspend(&cbbuf[..], Some(timeout)); match r { - Err(Error::Sys(Errno::EINTR)) => continue, + Err(Error(Errno::EINTR)) => continue, Err(e) => panic!("aio_suspend returned {:?}", e), Ok(_) => () }; |