mirror of
https://github.com/uutils/coreutils
synced 2024-12-15 15:52:42 +00:00
107 lines
2.6 KiB
Rust
107 lines
2.6 KiB
Rust
#![crate_id(name="whoami", version="1.0.0", author="KokaKiwi")]
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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: whoami (GNU coreutils) 8.21 */
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#![allow(non_camel_case_types)]
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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::io::print;
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use std::os;
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#[path = "../common/util.rs"] mod util;
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#[cfg(unix)]
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mod platform {
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use super::libc;
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use std::str;
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use self::c_types::{c_passwd, getpwuid};
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#[path = "../../common/c_types.rs"] mod c_types;
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extern {
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pub fn geteuid() -> libc::c_int;
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}
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pub unsafe fn getusername() -> String {
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let passwd: *c_passwd = getpwuid(geteuid());
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let pw_name: *libc::c_char = (*passwd).pw_name;
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let name = str::raw::from_c_str(pw_name);
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name
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}
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}
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#[cfg(windows)]
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mod platform {
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pub use super::libc;
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use std::mem;
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use std::str;
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extern "system" {
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pub fn GetUserNameA(out: *libc::c_char, len: *libc::uint32_t) -> libc::uint8_t;
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}
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#[allow(unused_unsafe)]
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pub unsafe fn getusername() -> String {
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let buffer: [libc::c_char, ..2048] = mem::uninitialized(); // XXX: it may be possible that this isn't long enough. I don't know
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if !GetUserNameA(buffer.as_ptr(), &(buffer.len() as libc::uint32_t)) == 0 {
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crash!(1, "username is too long");
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}
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str::raw::from_c_str(buffer.as_ptr())
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}
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}
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static NAME: &'static str = "whoami";
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#[allow(dead_code)]
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fn main() { os::set_exit_status(uumain(os::args())); }
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pub fn uumain(args: Vec<String>) -> int {
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let program = args.get(0).as_slice();
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let opts = [
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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) => crash!(1, "{}", f),
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};
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if matches.opt_present("help") {
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println!("whoami 1.0.0");
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println!("");
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println!("Usage:");
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println!(" {:s}", program);
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println!("");
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print(getopts::usage("print effective userid", 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!("whoami 1.0.0");
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return 0;
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}
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exec();
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0
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}
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pub fn exec() {
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unsafe {
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let username = platform::getusername();
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println!("{:s}", username);
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}
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}
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