NotAShelf/microfetch
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use nix crate instead of libc

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Provides a higher level and lighter alternative.
This commit is contained in:
raf 2024-08-03 20:56:02 +03:00
commit aae5f71004
Signed by: NotAShelf
GPG key ID: AF26552424E53993
4 changed files with 48 additions and 42 deletions
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40
src/system.rs
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@ -1,6 +1,6 @@
use libc::statfs as libc_statfs_struct;
use nix::sys::statvfs::statvfs;
use std::env;
use std::ffi::CString;
use std::fs::File;
use std::io::{self, BufRead};
use std::path::Path;
@ -16,34 +16,22 @@ pub fn get_username_and_hostname() -> Result<String, io::Error> {
Ok(format!("{YELLOW}{}{RED}@{GREEN}{}", username, hostname))
}
pub fn get_disk_usage() -> Result<String, io::Error> {
let path = CString::new("/").expect("CString::new failed");
pub fn get_root_disk_usage() -> Result<String, Box<dyn std::error::Error>> {
let vfs = statvfs("/")?;
let block_size = vfs.block_size() as u64;
let total_blocks = vfs.blocks();
let available_blocks = vfs.blocks_available();
let mut fs_stat: libc_statfs_struct = unsafe { std::mem::zeroed() };
let result = unsafe { libc::statfs(path.as_ptr(), &mut fs_stat) };
let total_size = block_size * total_blocks;
let used_size = total_size - (block_size * available_blocks);
if result != 0 {
return Err(io::Error::last_os_error());
}
let block_size = fs_stat.f_bsize as u64;
let total_blocks = fs_stat.f_blocks as u64;
let free_blocks = fs_stat.f_bfree as u64;
let total_size_bytes = total_blocks * block_size;
let used_size_bytes = (total_blocks - free_blocks) * block_size;
let total_size_gib = total_size_bytes as f64 / (1024.0 * 1024.0 * 1024.0);
let used_size_gib = used_size_bytes as f64 / (1024.0 * 1024.0 * 1024.0);
let percentage_used = (used_size_bytes as f64 / total_size_bytes as f64) * 100.0;
let formatted_total_size = format!("{:.2}", total_size_gib);
let formatted_used_size = format!("{:.2}", used_size_gib);
let formatted_percentage_used = format!("{:.0}", percentage_used);
let total_size_gib = total_size as f64 / (1024.0 * 1024.0 * 1024.0);
let used_size_gib = used_size as f64 / (1024.0 * 1024.0 * 1024.0);
let usage_percentage = (used_size as f64 / total_size as f64) * 100.0;
Ok(format!(
"{} GiB / {} GiB ({CYAN}{}%{RESET})",
formatted_used_size, formatted_total_size, formatted_percentage_used
"{:.2} GiB / {:.2} GiB ({CYAN}{:.0}%{RESET})",
used_size_gib, total_size_gib, usage_percentage
))
}