67 lines
1.6 KiB
Rust
67 lines
1.6 KiB
Rust
// Copyright (c) 2022 Emma Tebibyte
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// SPDX-License-Identifier: AGPL-3.0-or-later
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use std::fs::read_to_string;
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use std::io;
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use std::io::Write;
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use std::env;
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use std::process;
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fn main() {
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let mut args: Vec<String> = env::args().collect();
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let argv0 = args.remove(0);
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let mut opts = Vec::new();
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for arg in &args {
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if arg.starts_with("-") {
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opts.push(arg);
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}
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}
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if opts.is_empty() == false {
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for option in opts {
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match option.as_str() {
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// Write bytes from the input file to the standard output without
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// delay as each is read.
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"-u" => {},
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_ => {
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println!("Usage: {} [options...] [files...]", argv0);
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process::exit(64); // sysexits(3) EX_USAGE
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},
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};
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}
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}
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else {
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for path in args {
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let mut val = String::new();
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match path.as_str() {
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"-" => {
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let mut content = String::new();
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match io::stdin().read_line(&mut content) {
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Ok(_) => { val.push_str(&content); },
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Err(_) => {
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println!("Usage: {} [options...] [files...]", argv0);
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process::exit(64); // sysexits(3) EX_USAGE
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},
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};
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},
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_ => {
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match read_to_string(&path) {
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Ok(output) => { val.push_str(&output); },
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Err(_) => {
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println!("{}: {}: No such file or directory.", argv0, path);
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process::exit(66); // sysexits(3) EX_NOINPUT
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},
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};
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},
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}
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print!("{}", val);
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}
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}
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io::stdout().flush().unwrap();
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}
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