2304b13ec4
Dir methods do not change Dir object itself. They usually clone inner stream so no change really happens self struct. Underlying partition is modified but it does not have to affect API. For example see std::fs::File::set_len. This change greatly simplifies rename API usage.
43 lines
1.1 KiB
Rust
43 lines
1.1 KiB
Rust
extern crate fatfs;
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extern crate chrono;
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use std::env;
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use std::fs::File;
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use std::io;
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use chrono::{DateTime, Local};
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use fatfs::{FileSystem, FsOptions, BufStream};
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fn format_file_size(size: u64) -> String {
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const KB: u64 = 1024;
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const MB: u64 = 1024*KB;
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const GB: u64 = 1024*MB;
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if size < 1024 {
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format!("{}B", size)
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} else if size < MB {
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format!("{}KB", size / KB)
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} else if size < GB {
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format!("{}KB", size / MB)
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} else {
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format!("{}KB", size / GB)
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}
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}
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fn main() -> io::Result<()> {
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let file = File::open("resources/fat32.img")?;
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let mut buf_rdr = BufStream::new(file);
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let fs = FileSystem::new(&mut buf_rdr, FsOptions::new())?;
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let root_dir = fs.root_dir();
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let dir = match env::args().nth(1) {
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None => root_dir,
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Some(ref path) if path == "." => root_dir,
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Some(ref path) => root_dir.open_dir(&path)?,
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};
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for r in dir.iter() {
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let e = r?;
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let modified = DateTime::<Local>::from(e.modified()).format("%Y-%m-%d %H:%M:%S").to_string();
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println!("{:4} {} {}", format_file_size(e.len()), modified, e.file_name());
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}
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Ok(())
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}
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