system_error

跨平台系统错误库。

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lib.rs:

跨平台系统错误库。

此库捕获了Unix平台上errno、Windows上的GetLastError()以及macOS和iOS上的kern_return_t的行为和消息。此外，这些Error值可以被转换为std::io::Error值。

示例

在Linux上

use system_error::Error;
use std::io::ErrorKind;

let os_error = Error::from_raw_os_error(1);
assert_eq!(os_error.kind(), ErrorKind::PermissionDenied);
assert_eq!(
    format!("{}", os_error),
    "Operation not permitted (os error 1)"
);
assert_eq!(
    format!("{:?}", os_error),
    "Error { kind: PermissionDenied, message: \"Operation not permitted (os error 1)\" }"
);

let kern_error = Error::from_raw_kernel_error(8);
assert_eq!(kern_error.kind(), ErrorKind::Other);
assert_eq!(
    format!("{}", kern_error),
    "Unknown error (kernel error 8)"
);
assert_eq!(
    format!("{:?}", kern_error),
    "Error { kind: Other, message: \"Unknown error (kernel error 8)\" }"
);

在macOS上

use system_error::Error;
use std::io::ErrorKind;

let os_error = Error::from_raw_os_error(1);
assert_eq!(os_error.kind(), ErrorKind::PermissionDenied);
assert_eq!(
    format!("{}", os_error),
    "Operation not permitted (os error 1)"
);
assert_eq!(
    format!("{:?}", os_error),
    "Error { kind: PermissionDenied, message: \"Operation not permitted (os error 1)\" }"
);

let kern_error = Error::from_raw_kernel_error(8);
assert_eq!(kern_error.kind(), ErrorKind::PermissionDenied);
assert_eq!(
    format!("{}", kern_error),
    "(os/kern) no access (kernel error 8)"
);
assert_eq!(
    format!("{:?}", kern_error),
    "Error { kind: PermissionDenied, message: \"(os/kern) no access (kernel error 8)\" }"
);

在Windows上

use system_error::Error;
use std::io::ErrorKind;

let os_error = Error::from_raw_os_error(5);
assert_eq!(os_error.kind(), ErrorKind::PermissionDenied);
assert_eq!(
    format!("{}", os_error),
    "Access is denied. (os error 5)"
);
assert_eq!(
    format!("{:?}", os_error),
    "Error { kind: PermissionDenied, message: \"Access is denied. (os error 5)\" }"
);

let kern_error = Error::from_raw_kernel_error(8);
assert_eq!(kern_error.kind(), ErrorKind::Other);
assert_eq!(
    format!("{}", kern_error),
    "Unknown error (kernel error 8)"
);
assert_eq!(
    format!("{:?}", kern_error),
    "Error { kind: Other, message: \"Unknown error (kernel error 8)\" }"
);