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Make try_exists
return Ok(true)
for Windows Unix Sockets
#116683
Conversation
`fs::try_exists` currently fails on Windows if encountering a Unix Domain Socket (UDS). Fix this by checking for an error code that's returned when there's a failure to use a reparse point. A reparse point is a way to invoke a filesystem filter on a file instead of the file being opened normally. This is used to implement symbolic links (by redirecting to a different path) but also to implement other types of special files such as Unix domain sockets. If the reparse point is not a link type then opening it with `CreateFileW` may fail with `ERROR_CANT_ACCESS_FILE` because the filesystem filter does not implement that operation. This differs from resolving links which may fail with errors such as `ERROR_FILE_NOT_FOUND` or `ERROR_CANT_RESOLVE_FILENAME`. So `ERROR_CANT_ACCESS_FILE` means that the file exists but that we can't open it normally. Still, the file does exist so `try_exists` should report that as `Ok(true)`.
@bors r+ |
☀️ Test successful - checks-actions |
Finished benchmarking commit (ff5664d): comparison URL. Overall result: no relevant changes - no action needed@rustbot label: -perf-regression Instruction countThis benchmark run did not return any relevant results for this metric. Max RSS (memory usage)ResultsThis is a less reliable metric that may be of interest but was not used to determine the overall result at the top of this comment.
CyclesThis benchmark run did not return any relevant results for this metric. Binary sizeThis benchmark run did not return any relevant results for this metric. Bootstrap: 622.812s -> 624.492s (0.27%) |
54: Pull upstream master 2023 10 17 r=pietroalbini a=Veykril * rust-lang/rust#116196 * rust-lang/rust#116824 * rust-lang/rust#116822 * rust-lang/rust#116477 * rust-lang/rust#116826 * rust-lang/rust#116820 * rust-lang/rust#116811 * rust-lang/rust#116808 * rust-lang/rust#116805 * rust-lang/rust#116800 * rust-lang/rust#116798 * rust-lang/rust#116754 * rust-lang/rust#114370 * rust-lang/rust#116804 * rust-lang/rust#116802 * rust-lang/rust#116790 * rust-lang/rust#116786 * rust-lang/rust#116709 * rust-lang/rust#116430 * rust-lang/rust#116257 * rust-lang/rust#114157 * rust-lang/rust#116731 * rust-lang/rust#116550 * rust-lang/rust#114330 * rust-lang/rust#116724 * rust-lang/rust#116782 * rust-lang/rust#116776 * rust-lang/rust#115955 * rust-lang/rust#115196 * rust-lang/rust#116775 * rust-lang/rust#114589 * rust-lang/rust#113747 * rust-lang/rust#116772 * rust-lang/rust#116771 * rust-lang/rust#116760 * rust-lang/rust#116755 * rust-lang/rust#116732 * rust-lang/rust#116522 * rust-lang/rust#116341 * rust-lang/rust#116172 * rust-lang/rust#110604 * rust-lang/rust#110729 * rust-lang/rust#116527 * rust-lang/rust#116688 * rust-lang/rust#116757 * rust-lang/rust#116753 * rust-lang/rust#116748 * rust-lang/rust#116741 * rust-lang/rust#116594 * rust-lang/rust#116691 * rust-lang/rust#116643 * rust-lang/rust#116683 * rust-lang/rust#116635 * rust-lang/rust#115515 * rust-lang/rust#116742 * rust-lang/rust#116661 * rust-lang/rust#116576 * rust-lang/rust#116540 * rust-lang/rust#116352 * rust-lang/rust#116737 * rust-lang/rust#116730 * rust-lang/rust#116723 * rust-lang/rust#116715 * rust-lang/rust#116603 * rust-lang/rust#116591 * rust-lang/rust#115439 * rust-lang/rust#116264 * rust-lang/rust#116727 * rust-lang/rust#116704 * rust-lang/rust#116696 * rust-lang/rust#116695 * rust-lang/rust#116644 * rust-lang/rust#116630 * rust-lang/rust#116728 * rust-lang/rust#116689 * rust-lang/rust#116679 * rust-lang/rust#116618 * rust-lang/rust#116577 * rust-lang/rust#115653 * rust-lang/rust#116702 * rust-lang/rust#116015 * rust-lang/rust#115822 * rust-lang/rust#116407 * rust-lang/rust#115719 * rust-lang/rust#115524 * rust-lang/rust#116705 * rust-lang/rust#116645 * rust-lang/rust#116233 * rust-lang/rust#115108 * rust-lang/rust#116670 * rust-lang/rust#116676 * rust-lang/rust#116666 Co-authored-by: Benoît du Garreau <bdgdlm@outlook.com> Co-authored-by: Colin Finck <colin@reactos.org> Co-authored-by: Ian Jackson <ijackson@chiark.greenend.org.uk> Co-authored-by: Joshua Liebow-Feeser <joshlf@users.noreply.github.com> Co-authored-by: León Orell Valerian Liehr <me@fmease.dev> Co-authored-by: Trevor Gross <tmgross@umich.edu> Co-authored-by: Evan Merlock <evan@merlock.dev> Co-authored-by: joboet <jonasboettiger@icloud.com> Co-authored-by: Ralf Jung <post@ralfj.de> Co-authored-by: DaniPopes <57450786+DaniPopes@users.noreply.github.com> Co-authored-by: Mark Rousskov <mark.simulacrum@gmail.com> Co-authored-by: onur-ozkan <work@onurozkan.dev> Co-authored-by: Nicholas Nethercote <n.nethercote@gmail.com> Co-authored-by: The 8472 <git@infinite-source.de> Co-authored-by: Samuel Thibault <samuel.thibault@ens-lyon.org> Co-authored-by: reez12g <reez12g@gmail.com> Co-authored-by: Jakub Beránek <berykubik@gmail.com>
This test fails on versions of windows before Windows 10 1803 (Redstone 4, April 2018 update), as those versions of windows don't have AF_UNIX support. |
@roblabla Hm, I can add a check for if we're running in CI? I could also unconditionally skip the test if |
…rk-Simulacrum Skip test if Unix sockets are unsupported Fixes rust-lang#116683 (comment) The test will be skipped if `AF_UNIX` is not supported. In that case [`WSASocketW` returns `WSAEAFNOSUPPORT`](https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsasocketw#return-value). It will never skip the test when run in CI but maybe this is me being too defensive since the error code is narrowly scoped to just the af family parameter being unsupported? Also fixed a minor typo. r? `@Mark-Simulacrum`
Rollup merge of rust-lang#116989 - ChrisDenton:skip-unsupported, r=Mark-Simulacrum Skip test if Unix sockets are unsupported Fixes rust-lang#116683 (comment) The test will be skipped if `AF_UNIX` is not supported. In that case [`WSASocketW` returns `WSAEAFNOSUPPORT`](https://learn.microsoft.com/en-us/windows/win32/api/winsock2/nf-winsock2-wsasocketw#return-value). It will never skip the test when run in CI but maybe this is me being too defensive since the error code is narrowly scoped to just the af family parameter being unsupported? Also fixed a minor typo. r? `@Mark-Simulacrum`
This is a follow up to #109106 but for
fs::try_exists
, which doesn't need to get the metadata of a file (which can fail even if a file exists).fs::try_exists
currently fails on Windows if encountering a Unix Domain Socket (UDS). This PR fixes it by checking for an error code that's returned when there's a failure to use a reparse point.Reparse points
A reparse point is a way to invoke a filesystem filter on a file instead of the file being opened normally. This is used to implement symbolic links (by redirecting to a different path) but also to implement other types of special files such as Unix domain sockets. If the reparse point is not a link type then opening it with
CreateFileW
may fail withERROR_CANT_ACCESS_FILE
because the filesystem filter does not implement that operation. This differs from resolving links which may fail with errors such asERROR_FILE_NOT_FOUND
orERROR_CANT_RESOLVE_FILENAME
.So
ERROR_CANT_ACCESS_FILE
means that the file exists but that we can't open it normally. Still, the file does exist on the filesystem sotry_exists
should report that asOk(true)
.r? libs