mirror of
https://github.com/uutils/coreutils
synced 2024-12-17 00:23:18 +00:00
81 lines
2.2 KiB
Rust
81 lines
2.2 KiB
Rust
#![crate_id(name="printenv", vers="1.0.0", author="Seldaek")]
|
|
|
|
/*
|
|
* This file is part of the uutils coreutils package.
|
|
*
|
|
* (c) Jordi Boggiano <j.boggiano@seld.be>
|
|
*
|
|
* For the full copyright and license information, please view the LICENSE
|
|
* file that was distributed with this source code.
|
|
*/
|
|
|
|
/* last synced with: printenv (GNU coreutils) 8.13 */
|
|
|
|
#![feature(macro_rules)]
|
|
|
|
extern crate getopts;
|
|
extern crate libc;
|
|
|
|
use std::os;
|
|
use std::io::print;
|
|
|
|
#[path = "../common/util.rs"]
|
|
mod util;
|
|
|
|
static NAME: &'static str = "printenv";
|
|
|
|
fn main() {
|
|
let args: Vec<StrBuf> = os::args().iter().map(|x| x.to_strbuf()).collect();
|
|
let program = args.get(0).clone();
|
|
let opts = ~[
|
|
getopts::optflag("0", "null", "end each output line with 0 byte rather than newline"),
|
|
getopts::optflag("h", "help", "display this help and exit"),
|
|
getopts::optflag("V", "version", "output version information and exit"),
|
|
];
|
|
let matches = match getopts::getopts(args.tail(), opts) {
|
|
Ok(m) => m,
|
|
Err(f) => {
|
|
crash!(1, "Invalid options\n{}", f.to_err_msg())
|
|
}
|
|
};
|
|
if matches.opt_present("help") {
|
|
println!("printenv 1.0.0");
|
|
println!("");
|
|
println!("Usage:");
|
|
println!(" {0:s} [VARIABLE]... [OPTION]...", program);
|
|
println!("");
|
|
print(getopts::usage("Prints the given environment VARIABLE(s), otherwise prints them all.", opts).as_slice());
|
|
return;
|
|
}
|
|
if matches.opt_present("version") {
|
|
println!("printenv 1.0.0");
|
|
return;
|
|
}
|
|
let mut separator = "\n";
|
|
if matches.opt_present("null") {
|
|
separator = "\x00";
|
|
};
|
|
|
|
exec(matches.free, separator);
|
|
}
|
|
|
|
pub fn exec(args: Vec<StrBuf>, separator: &str) {
|
|
if args.is_empty() {
|
|
let vars = os::env();
|
|
for (env_var, value) in vars.move_iter() {
|
|
print!("{0:s}={1:s}", env_var, value);
|
|
print(separator);
|
|
}
|
|
return;
|
|
}
|
|
|
|
for env_var in args.iter() {
|
|
match os::getenv(env_var.as_slice()) {
|
|
Some(var) => {
|
|
print(var.as_slice());
|
|
print(separator);
|
|
}
|
|
_ => ()
|
|
}
|
|
}
|
|
}
|