Enum LaunchNonceError 

#[non_exhaustive]
pub enum LaunchNonceError {
    Malformed {
        value: String,
    },
    NotOpen {
        fd: i32,
        errno: i32,
    },
    NotAPipe {
        fd: i32,
    },
    WrongPipe {
        fd: i32,
        expected_inode: u64,
        found_inode: u64,
    },
    Empty {
        fd: i32,
    },
    Unreadable {
        fd: i32,
        errno: Option<i32>,
    },
    NotUtf8 {
        fd: i32,
    },
}

Why the descriptor named by LAUNCH_NONCE_FD_ENV gave no nonce.

None of these falls back to the environment copy. A named descriptor that cannot be read means the handoff went wrong, or that this process inherited the variable from a module without inheriting the pipe; reading the environment instead would hide the first and defeat the second.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Malformed

The variable is not <fd>:<inode>.

Fields

value: String

NotOpen

Nothing is open at that number: the variable was inherited without the descriptor, which is what a process spawned by a module sees.

Fields

fd: i32

errno: i32

NotAPipe

The descriptor is open but is not a pipe. It was left alone.

Fields

fd: i32

WrongPipe

The descriptor is a pipe, but not the one named. It was left alone.

Fields

fd: i32

expected_inode: u64

found_inode: u64

Empty

The named pipe holds no bytes. It was left open and unread.

Fields

fd: i32

Unreadable

Reading the named pipe failed.

Fields

fd: i32

errno: Option<i32>

NotUtf8

The named pipe held bytes that are not UTF-8.

Fields

fd: i32

Trait Implementations

impl Clone for LaunchNonceError

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for LaunchNonceError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for LaunchNonceError

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Eq for LaunchNonceError

impl Error for LaunchNonceError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl PartialEq for LaunchNonceError

fn eq(&self, other: &Self) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for LaunchNonceError