mirror of
https://github.com/uutils/coreutils
synced 2024-12-15 15:52:42 +00:00
30bba07f9c
squashed: a2c6b27 - build: automatically generate main() files c942f0f - remove MULTICALL=1 build from travis cb7b35b - make: remove unnecessary shell command 69bbb31 - update README 03a3168 - all: move main() into separate file that links against util crate 8276384 - make: always build multicall binary aa4edeb - make: avoid 'rustc --crate-file-name'
82 lines
2.1 KiB
Rust
82 lines
2.1 KiB
Rust
#![crate_id(name="printenv", vers="1.0.0", author="Seldaek")]
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/*
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* This file is part of the uutils coreutils package.
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*
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* (c) Jordi Boggiano <j.boggiano@seld.be>
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*
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* For the full copyright and license information, please view the LICENSE
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* file that was distributed with this source code.
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*/
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/* last synced with: printenv (GNU coreutils) 8.13 */
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#![feature(macro_rules)]
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extern crate getopts;
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extern crate libc;
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use std::os;
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use std::io::print;
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#[path = "../common/util.rs"]
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mod util;
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static NAME: &'static str = "printenv";
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pub fn uumain(args: Vec<String>) -> int {
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let program = args.get(0).clone();
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let opts = [
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getopts::optflag("0", "null", "end each output line with 0 byte rather than newline"),
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getopts::optflag("h", "help", "display this help and exit"),
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getopts::optflag("V", "version", "output version information and exit"),
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];
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let matches = match getopts::getopts(args.tail(), opts) {
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Ok(m) => m,
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Err(f) => {
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crash!(1, "Invalid options\n{}", f)
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}
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};
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if matches.opt_present("help") {
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println!("printenv 1.0.0");
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println!("");
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println!("Usage:");
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println!(" {0:s} [VARIABLE]... [OPTION]...", program);
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println!("");
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print(getopts::usage("Prints the given environment VARIABLE(s), otherwise prints them all.", opts).as_slice());
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return 0;
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}
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if matches.opt_present("version") {
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println!("printenv 1.0.0");
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return 0;
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}
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let mut separator = "\n";
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if matches.opt_present("null") {
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separator = "\x00";
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};
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exec(matches.free, separator);
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0
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}
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pub fn exec(args: Vec<String>, separator: &str) {
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if args.is_empty() {
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let vars = os::env();
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for (env_var, value) in vars.move_iter() {
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print!("{0:s}={1:s}", env_var, value);
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print(separator);
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}
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return;
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}
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for env_var in args.iter() {
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match os::getenv(env_var.as_slice()) {
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Some(var) => {
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print(var.as_slice());
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print(separator);
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}
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_ => ()
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}
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}
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}
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