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use {
super::*,
std::{ffi::CString, mem, os::unix::ffi::OsStrExt, path::Path},
};
#[derive(Debug, Clone)]
pub struct Stats {
pub bsize: u64,
pub blocks: u64,
pub bavail: u64,
pub bfree: u64,
}
impl Stats {
pub fn from(mount_point: &Path) -> Result<Option<Self>> {
let c_mount_point = CString::new(mount_point.as_os_str().as_bytes()).unwrap();
unsafe {
let mut statvfs = mem::MaybeUninit::<libc::statvfs>::uninit();
let code = libc::statvfs(c_mount_point.as_ptr(), statvfs.as_mut_ptr());
match code {
0 => {
let statvfs = statvfs.assume_init();
Ok(Some(Stats {
bsize: statvfs.f_bsize as u64,
blocks: statvfs.f_blocks as u64,
bavail: statvfs.f_bavail as u64,
bfree: statvfs.f_bfree as u64,
}))
}
-1 => {
Ok(None)
}
_ => {
Err(Error::UnexpectedStavfsReturn {
code,
path: mount_point.to_path_buf(),
})
}
}
}
}
pub fn size(&self) -> u64 {
self.bsize * self.blocks
}
pub fn available(&self) -> u64 {
self.bsize * self.bavail
}
pub fn used(&self) -> u64 {
self.size() - self.available()
}
pub fn use_share(&self) -> f64 {
if self.size() == 0 {
0.0
} else {
self.used() as f64 / (self.size() as f64)
}
}
}