19 lines
436 B
Rust
19 lines
436 B
Rust
use std::{env::args, process::ExitCode};
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fn usage(s: &str) -> ExitCode {
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eprintln!("Usage: {} [status]", s);
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ExitCode::from(64 /* NetBSD sysexits(3) EX_USAGE */)
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}
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fn main() -> ExitCode {
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let argv = args().collect::<Vec<String>>();
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match argv.len() {
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2 => match argv[1].parse::<u8>() {
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Ok(e) => ExitCode::from(e),
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_ => usage(&argv[0]),
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},
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_ => usage(&argv[0]),
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}
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}
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