mirror of
https://source.quilibrium.com/quilibrium/ceremonyclient.git
synced 2024-12-27 00:55:17 +00:00
45 lines
1.5 KiB
Go
45 lines
1.5 KiB
Go
|
// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
|
||
|
|
// of this source code is governed by a BSD-style license that can be found in
|
||
|
|
// the LICENSE file.
|
||
|
|
|
||
|
|
//go:build linux
|
||
|
|
// +build linux
|
||
|
|
|
||
|
|
package vfs
|
||
|
|
|
||
|
|
import "golang.org/x/sys/unix"
|
||
|
|
|
||
|
|
func (defaultFS) GetDiskUsage(path string) (DiskUsage, error) {
|
||
|
|
stat := unix.Statfs_t{}
|
||
|
|
if err := unix.Statfs(path, &stat); err != nil {
|
||
|
|
return DiskUsage{}, err
|
||
|
|
}
|
||
|
|
|
||
|
|
// We use stat.Frsize here rather than stat.Bsize because on
|
||
|
|
// Linux Bavail and Bfree are in Frsize units.
|
||
|
|
//
|
||
|
|
// On most filesystems Frsize and Bsize will be set to the
|
||
|
|
// same value, but on some filesystems bsize returns the
|
||
|
|
// "optimal transfer block size"[1] which may be different
|
||
|
|
// (typically larger) than the actual block size.
|
||
|
|
//
|
||
|
|
// This confusion is cleared up in the statvfs[2] libc function,
|
||
|
|
// but the statfs system call used above varies across
|
||
|
|
// platforms.
|
||
|
|
//
|
||
|
|
// Frsize is used by GNU coreutils and other libraries, so
|
||
|
|
// this also helps ensure that we get the same results as one
|
||
|
|
// would get if they ran `df` on the given path.
|
||
|
|
//
|
||
|
|
// [1] https://man7.org/linux/man-pages/man2/statfs.2.html
|
||
|
|
// [2] https://man7.org/linux/man-pages/man3/statvfs.3.html
|
||
|
|
freeBytes := uint64(stat.Frsize) * uint64(stat.Bfree)
|
||
|
|
availBytes := uint64(stat.Frsize) * uint64(stat.Bavail)
|
||
|
|
totalBytes := uint64(stat.Frsize) * uint64(stat.Blocks)
|
||
|
|
return DiskUsage{
|
||
|
|
AvailBytes: availBytes,
|
||
|
|
TotalBytes: totalBytes,
|
||
|
|
UsedBytes: totalBytes - freeBytes,
|
||
|
|
}, nil
|
||
|
|
}
|