Enum ExitCode 

#[repr(i32)]
pub enum ExitCode {
    Success = 0,
    Error = 1,
    UsageError = 64,
    DataError = 65,
    NoInput = 66,
    NoUser = 67,
    NoHost = 68,
    Unavailable = 69,
    Software = 70,
    OsError = 71,
    OsFile = 72,
    CantCreate = 73,
    IoError = 74,
    TempFail = 75,
    Protocol = 76,
    NoPerm = 77,
    Config = 78,
    Interrupted = 130,
    Terminated = 143,
}

Exit codes following Unix conventions (BSD sysexits.h)

Variants

Success = 0

Successful termination (0)

Error = 1

General error (1)

UsageError = 64

Command line usage error (64)

• Invalid arguments
• Missing required arguments
• Unknown flags

DataError = 65

Data format error (65)

• Invalid input data
• Malformed configuration
• Parse errors

NoInput = 66

Cannot open input (66)

• File not found
• Cannot read file
• Permission denied on input

NoUser = 67

User does not exist (67)

• Unknown user specified
• Invalid user context

NoHost = 68

Host name unknown (68)

• Unknown host
• Cannot resolve hostname

Unavailable = 69

Service unavailable (69)

• Required service not running
• Dependency not available
• External service unreachable

Software = 70

Internal software error (70)

• Unexpected error
• Assertion failure
• Internal consistency check failed

OsError = 71

System error (71)

• OS error
• System call failed
• Fork failed

OsFile = 72

Critical OS file missing (72)

• Required system file not found
• Missing configuration file

CantCreate = 73

Cannot create output file (73)

• Cannot write output
• Disk full
• Permission denied on output

IoError = 74

I/O error (74)

• Read error
• Write error
• Network I/O error

TempFail = 75

Temporary failure, retry (75)

• Resource temporarily unavailable
• Retry operation

Protocol = 76

Remote error in protocol (76)

• Protocol violation
• Invalid response
• Communication error

NoPerm = 77

Permission denied (77)

• Insufficient privileges
• Access denied
• Not authorized

Config = 78

Configuration error (78)

• Invalid configuration
• Missing required configuration
• Configuration validation failed

Interrupted = 130

Interrupted by signal (SIGINT - Ctrl+C) (130)

• User interrupted (Ctrl+C)
• SIGINT received

Terminated = 143

Terminated by signal (SIGTERM) (143)

• SIGTERM received
• Graceful shutdown requested

Implementations

impl ExitCode

pub fn as_i32(self) -> i32

Convert to i32 for use with std::process::exit

pub fn from_error(error: &dyn Error) -> Self

Create ExitCode from error type

Maps common error types to appropriate exit codes:

• I/O errors → IoError (74)
• Parse errors → DataError (65)
• Permission errors → NoPerm (77)
• Not found errors → NoInput (66)
• Invalid argument → UsageError (64)
• Other errors → Error (1)

pub fn description(self) -> &'static str

Get human-readable description of exit code

pub fn is_success(self) -> bool

Check if this is a success exit code

pub fn is_error(self) -> bool

Check if this is an error exit code

pub fn is_signal(self) -> bool

Check if this represents a signal interruption

Trait Implementations

impl Clone for ExitCode

fn clone(&self) -> ExitCode

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ExitCode

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

Formats the value using the given formatter.

impl Default for ExitCode

fn default() -> ExitCode

Returns the “default value” for a type.

impl Display for ExitCode

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

Formats the value using the given formatter.

impl From<ExitCode> for ExitCode

fn from(code: ExitCode) -> ExitCode

Converts to this type from the input type.

impl From<ExitCode> for i32

fn from(code: ExitCode) -> i32

Converts to this type from the input type.

impl PartialEq for ExitCode

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

Tests for self and other values to be equal, and is used by ==.

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

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for ExitCode

impl Eq for ExitCode

impl StructuralPartialEq for ExitCode