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| #![no_std]
#![no_main]
extern crate alloc;
extern crate ulib;
ulib::entry!(main);
use alloc::{format, string::String};
use ulib::*;
fn main() -> i64 {
let (Some(src), Some(dst), 3) = (arg(1), arg(2), argc()) else {
eprintln!("usage: cp source dest");
return 2;
};
let mut st = Stat::default();
let mut dst = String::from(dst);
if stat(&dst, &mut st) == 0 && st.is_dir() {
let name = src.rsplit('/').next().unwrap_or(src);
dst = format!("{}/{}", dst.trim_end_matches('/'), name);
}
let from = open(src, 0);
if from < 0 {
eprintln!("cp: {}: {}", src, strerror(from));
return 1;
}
let to = open(&dst, O_WRONLY | O_CREAT | O_TRUNC);
if to < 0 {
eprintln!("cp: {}: {}", dst, strerror(to));
close(from);
return 1;
}
let mut buf = [0u8; 512];
let mut status = 0;
loop {
let n = read(from, &mut buf);
if n <= 0 || write_all(to, &buf[..n.max(0) as usize]) < 0 {
if n < 0 {
eprintln!("cp: {}: {}", src, strerror(n));
status = 1;
}
break;
}
}
close(from);
close(to);
status
}
|