Gilles Soulier
243c97d71b
Remplace sysinfo::Disks par un appel direct à libc::statvfs("/").
- used = (f_blocks − f_bfree) × f_frsize → correspond à df "Utilisé"
- free = f_bavail × f_frsize → correspond à df "Dispo"
- total = f_blocks × f_frsize
Avant (sysinfo) : used comptait les blocs réservés root → surestimation de ~3-4 Go.
Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
37 lines
1.3 KiB
Rust
37 lines
1.3 KiB
Rust
use std::mem::MaybeUninit;
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/// Retourne (used, free, total) en octets pour le système de fichiers racine "/".
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/// Utilise statvfs() directement pour correspondre exactement aux chiffres de `df` :
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/// - total = f_blocks × f_frsize
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/// - used = (f_blocks − f_bfree) × f_frsize (blocs effectivement écrits)
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/// - free = f_bavail × f_frsize (disponible pour utilisateurs non-root)
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pub fn get() -> (u64, u64, u64) {
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let path = b"/\0";
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let mut stat = MaybeUninit::<libc::statvfs>::uninit();
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let ret = unsafe { libc::statvfs(path.as_ptr() as *const libc::c_char, stat.as_mut_ptr()) };
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if ret != 0 {
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return (0, 0, 0);
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}
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let stat = unsafe { stat.assume_init() };
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let bsize = stat.f_frsize as u64;
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let total = stat.f_blocks.saturating_mul(bsize);
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let used = stat.f_blocks.saturating_sub(stat.f_bfree).saturating_mul(bsize);
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let free = stat.f_bavail.saturating_mul(bsize);
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(used, free, total)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_disk_coherent() {
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let (used, free, total) = get();
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eprintln!("résultat statvfs : used={used} free={free} total={total}");
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if total > 0 {
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assert!(used + free <= total + 1024 * 1024, "used + free > total");
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assert!(total > 0, "total doit être > 0");
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}
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}
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}
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