github.com/zuoyebang/bitalosdb@v1.1.1-0.20240516111551-79a8c4d8ce20/internal/vfs/disk_usage_unix.go (about)

     1  // Copyright 2021 The Bitalosdb author(hustxrb@163.com) and other contributors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  //go:build darwin || openbsd || dragonfly || freebsd
    16  
    17  package vfs
    18  
    19  import "golang.org/x/sys/unix"
    20  
    21  func (defaultFS) GetDiskUsage(path string) (DiskUsage, error) {
    22  	stat := unix.Statfs_t{}
    23  	if err := unix.Statfs(path, &stat); err != nil {
    24  		return DiskUsage{}, err
    25  	}
    26  
    27  	freeBytes := uint64(stat.Bsize) * uint64(stat.Bfree)
    28  	availBytes := uint64(stat.Bsize) * uint64(stat.Bavail)
    29  	totalBytes := uint64(stat.Bsize) * uint64(stat.Blocks)
    30  	return DiskUsage{
    31  		AvailBytes: availBytes,
    32  		TotalBytes: totalBytes,
    33  		UsedBytes:  totalBytes - freeBytes,
    34  	}, nil
    35  }