use anyhow::Error; pub fn get_error_code(err: &Error) -> Option<&'static str> { err .downcast_ref::() .map(|e| match e.raw_os_error() { Some(code) => get_os_error_code(code), None => get_io_error_code(e), }) .and_then(|code| match code.is_empty() { true => None, false => Some(code), }) } fn get_io_error_code(err: &std::io::Error) -> &'static str { // not exhaustive but simple and possibly sufficient once `io_error_more` is stabilized (https://github.com/rust-lang/rust/issues/86442) // inversion of https://github.com/rust-lang/rust/blob/dca3f1b786efd27be3b325ed1e01e247aa589c3b/library/std/src/sys/unix/mod.rs#L138-L185 // TODO(@AaronO): revisit as `io_error_more` lands in rust stable use std::io::ErrorKind; match err.kind() { // ErrorKind::ArgumentListTooLong => "E2BIG", ErrorKind::AddrInUse => "EADDRINUSE", ErrorKind::AddrNotAvailable => "EADDRNOTAVAIL", // ErrorKind::ResourceBusy => "EBUSY", ErrorKind::ConnectionAborted => "ECONNABORTED", ErrorKind::ConnectionRefused => "ECONNREFUSED", ErrorKind::ConnectionReset => "ECONNRESET", // ErrorKind::Deadlock => "EDEADLK", // ErrorKind::FilesystemQuotaExceeded => "EDQUOT", ErrorKind::AlreadyExists => "EEXIST", // ErrorKind::FileTooLarge => "EFBIG", // ErrorKind::HostUnreachable => "EHOSTUNREACH", ErrorKind::Interrupted => "EINTR", ErrorKind::InvalidInput => "EINVAL", // ErrorKind::IsADirectory => "EISDIR", // ErrorKind::FilesystemLoop => "ELOOP", ErrorKind::NotFound => "ENOENT", ErrorKind::OutOfMemory => "ENOMEM", // ErrorKind::StorageFull => "ENOSPC", ErrorKind::Unsupported => "ENOSYS", // ErrorKind::TooManyLinks => "EMLINK", // ErrorKind::FilenameTooLong => "ENAMETOOLONG", // ErrorKind::NetworkDown => "ENETDOWN", // ErrorKind::NetworkUnreachable => "ENETUNREACH", ErrorKind::NotConnected => "ENOTCONN", // ErrorKind::NotADirectory => "ENOTDIR", // ErrorKind::DirectoryNotEmpty => "ENOTEMPTY", ErrorKind::BrokenPipe => "EPIPE", // ErrorKind::ReadOnlyFilesystem => "EROFS", // ErrorKind::NotSeekable => "ESPIPE", // ErrorKind::StaleNetworkFileHandle => "ESTALE", ErrorKind::TimedOut => "ETIMEDOUT", // ErrorKind::ExecutableFileBusy => "ETXTBSY", // ErrorKind::CrossesDevices => "EXDEV", ErrorKind::PermissionDenied => "EACCES", // NOTE: Collides with EPERM ... _ => "", } } /// Maps OS errno codes to string names /// derived from libuv: https://github.com/libuv/libuv/blob/26b2e5dbb6301756644d6e4cf6ca9c49c00513d3/include/uv/errno.h /// generated with tools/codegen_error_codes.js #[cfg(unix)] fn get_os_error_code(errno: i32) -> &'static str { match errno { libc::E2BIG => "E2BIG", libc::EACCES => "EACCES", libc::EADDRINUSE => "EADDRINUSE", libc::EADDRNOTAVAIL => "EADDRNOTAVAIL", libc::EAFNOSUPPORT => "EAFNOSUPPORT", libc::EAGAIN => "EAGAIN", libc::EALREADY => "EALREADY", libc::EBADF => "EBADF", libc::EBUSY => "EBUSY", libc::ECANCELED => "ECANCELED", libc::ECONNABORTED => "ECONNABORTED", libc::ECONNREFUSED => "ECONNREFUSED", libc::ECONNRESET => "ECONNRESET", libc::EEXIST => "EEXIST", libc::EFAULT => "EFAULT", libc::EHOSTUNREACH => "EHOSTUNREACH", libc::EINVAL => "EINVAL", libc::EIO => "EIO", libc::EISCONN => "EISCONN", libc::EISDIR => "EISDIR", libc::ELOOP => "ELOOP", libc::EMFILE => "EMFILE", libc::EMSGSIZE => "EMSGSIZE", libc::ENAMETOOLONG => "ENAMETOOLONG", libc::ENETUNREACH => "ENETUNREACH", libc::ENOBUFS => "ENOBUFS", libc::ENOENT => "ENOENT", libc::ENOMEM => "ENOMEM", libc::ENOSPC => "ENOSPC", libc::ENOTCONN => "ENOTCONN", libc::ENOTEMPTY => "ENOTEMPTY", libc::ENOTSOCK => "ENOTSOCK", libc::ENOTSUP => "ENOTSUP", libc::EPERM => "EPERM", libc::EPIPE => "EPIPE", libc::EPROTONOSUPPORT => "EPROTONOSUPPORT", libc::EROFS => "EROFS", libc::ETIMEDOUT => "ETIMEDOUT", libc::EXDEV => "EXDEV", libc::ESOCKTNOSUPPORT => "ESOCKTNOSUPPORT", _ => "", } } #[cfg(windows)] fn get_os_error_code(errno: i32) -> &'static str { match errno { 998 => "EACCES", // ERROR_NOACCESS 10013 => "EACCES", // WSAEACCES 1920 => "EACCES", // ERROR_CANT_ACCESS_FILE 1227 => "EADDRINUSE", // ERROR_ADDRESS_ALREADY_ASSOCIATED 10048 => "EADDRINUSE", // WSAEADDRINUSE 10049 => "EADDRNOTAVAIL", // WSAEADDRNOTAVAIL 10047 => "EAFNOSUPPORT", // WSAEAFNOSUPPORT 10035 => "EAGAIN", // WSAEWOULDBLOCK 10037 => "EALREADY", // WSAEALREADY 1004 => "EBADF", // ERROR_INVALID_FLAGS 6 => "EBADF", // ERROR_INVALID_HANDLE 33 => "EBUSY", // ERROR_LOCK_VIOLATION 231 => "EBUSY", // ERROR_PIPE_BUSY 32 => "EBUSY", // ERROR_SHARING_VIOLATION 995 => "ECANCELED", // ERROR_OPERATION_ABORTED 10004 => "ECANCELED", // WSAEINTR 1236 => "ECONNABORTED", // ERROR_CONNECTION_ABORTED 10053 => "ECONNABORTED", // WSAECONNABORTED 1225 => "ECONNREFUSED", // ERROR_CONNECTION_REFUSED 10061 => "ECONNREFUSED", // WSAECONNREFUSED 64 => "ECONNRESET", // ERROR_NETNAME_DELETED 10054 => "ECONNRESET", // WSAECONNRESET 183 => "EEXIST", // ERROR_ALREADY_EXISTS 80 => "EEXIST", // ERROR_FILE_EXISTS 111 => "EFAULT", // ERROR_BUFFER_OVERFLOW 10014 => "EFAULT", // WSAEFAULT 1232 => "EHOSTUNREACH", // ERROR_HOST_UNREACHABLE 10065 => "EHOSTUNREACH", // WSAEHOSTUNREACH 122 => "EINVAL", // ERROR_INSUFFICIENT_BUFFER 13 => "EINVAL", // ERROR_INVALID_DATA 87 => "EINVAL", // ERROR_INVALID_PARAMETER 1464 => "EINVAL", // ERROR_SYMLINK_NOT_SUPPORTED 10022 => "EINVAL", // WSAEINVAL 10046 => "EINVAL", // WSAEPFNOSUPPORT 1102 => "EIO", // ERROR_BEGINNING_OF_MEDIA 1111 => "EIO", // ERROR_BUS_RESET 23 => "EIO", // ERROR_CRC 1166 => "EIO", // ERROR_DEVICE_DOOR_OPEN 1165 => "EIO", // ERROR_DEVICE_REQUIRES_CLEANING 1393 => "EIO", // ERROR_DISK_CORRUPT 1129 => "EIO", // ERROR_EOM_OVERFLOW 1101 => "EIO", // ERROR_FILEMARK_DETECTED 31 => "EIO", // ERROR_GEN_FAILURE 1106 => "EIO", // ERROR_INVALID_BLOCK_LENGTH 1117 => "EIO", // ERROR_IO_DEVICE 1104 => "EIO", // ERROR_NO_DATA_DETECTED 205 => "EIO", // ERROR_NO_SIGNAL_SENT 110 => "EIO", // ERROR_OPEN_FAILED 1103 => "EIO", // ERROR_SETMARK_DETECTED 156 => "EIO", // ERROR_SIGNAL_REFUSED 10056 => "EISCONN", // WSAEISCONN 1921 => "ELOOP", // ERROR_CANT_RESOLVE_FILENAME 4 => "EMFILE", // ERROR_TOO_MANY_OPEN_FILES 10024 => "EMFILE", // WSAEMFILE 10040 => "EMSGSIZE", // WSAEMSGSIZE 206 => "ENAMETOOLONG", // ERROR_FILENAME_EXCED_RANGE 1231 => "ENETUNREACH", // ERROR_NETWORK_UNREACHABLE 10051 => "ENETUNREACH", // WSAENETUNREACH 10055 => "ENOBUFS", // WSAENOBUFS 161 => "ENOENT", // ERROR_BAD_PATHNAME 267 => "ENOENT", // ERROR_DIRECTORY 203 => "ENOENT", // ERROR_ENVVAR_NOT_FOUND 2 => "ENOENT", // ERROR_FILE_NOT_FOUND 123 => "ENOENT", // ERROR_INVALID_NAME 15 => "ENOENT", // ERROR_INVALID_DRIVE 4392 => "ENOENT", // ERROR_INVALID_REPARSE_DATA 126 => "ENOENT", // ERROR_MOD_NOT_FOUND 3 => "ENOENT", // ERROR_PATH_NOT_FOUND 11001 => "ENOENT", // WSAHOST_NOT_FOUND 11004 => "ENOENT", // WSANO_DATA 8 => "ENOMEM", // ERROR_NOT_ENOUGH_MEMORY 14 => "ENOMEM", // ERROR_OUTOFMEMORY 82 => "ENOSPC", // ERROR_CANNOT_MAKE 112 => "ENOSPC", // ERROR_DISK_FULL 277 => "ENOSPC", // ERROR_EA_TABLE_FULL 1100 => "ENOSPC", // ERROR_END_OF_MEDIA 39 => "ENOSPC", // ERROR_HANDLE_DISK_FULL 2250 => "ENOTCONN", // ERROR_NOT_CONNECTED 10057 => "ENOTCONN", // WSAENOTCONN 145 => "ENOTEMPTY", // ERROR_DIR_NOT_EMPTY 10038 => "ENOTSOCK", // WSAENOTSOCK 50 => "ENOTSUP", // ERROR_NOT_SUPPORTED 5 => "EPERM", // ERROR_ACCESS_DENIED 1314 => "EPERM", // ERROR_PRIVILEGE_NOT_HELD 230 => "EPIPE", // ERROR_BAD_PIPE 232 => "EPIPE", // ERROR_NO_DATA 233 => "EPIPE", // ERROR_PIPE_NOT_CONNECTED 10058 => "EPIPE", // WSAESHUTDOWN 10043 => "EPROTONOSUPPORT", // WSAEPROTONOSUPPORT 19 => "EROFS", // ERROR_WRITE_PROTECT 121 => "ETIMEDOUT", // ERROR_SEM_TIMEOUT 10060 => "ETIMEDOUT", // WSAETIMEDOUT 17 => "EXDEV", // ERROR_NOT_SAME_DEVICE 1 => "EISDIR", // ERROR_INVALID_FUNCTION 208 => "E2BIG", // ERROR_META_EXPANSION_TOO_LONG 10044 => "ESOCKTNOSUPPORT", // WSAESOCKTNOSUPPORT _ => "", } }