81 lines
2.2 KiB
Go
81 lines
2.2 KiB
Go
//go:build !windows
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// +build !windows
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package fs
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import (
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"os"
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"syscall"
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"golang.org/x/sys/unix"
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)
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// SyncDir flushes any file renames to the filesystem.
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func SyncDir(dirName string) error {
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// fsync the dir to flush the rename
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dir, err := os.OpenFile(dirName, os.O_RDONLY, os.ModeDir)
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if err != nil {
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return err
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}
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defer dir.Close()
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// While we're on unix, we may be running in a Docker container that is
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// pointed at a Windows volume over samba. That doesn't support fsyncs
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// on directories. This shows itself as an EINVAL, so we ignore that
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// error.
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err = dir.Sync()
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if pe, ok := err.(*os.PathError); ok && pe.Err == syscall.EINVAL {
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err = nil
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} else if err != nil {
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return err
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}
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return dir.Close()
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}
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// RenameFileWithReplacement will replace any existing file at newpath with the contents
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// of oldpath.
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//
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// If no file already exists at newpath, newpath will be created using the contents
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// of oldpath. If this function returns successfully, the contents of newpath will
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// be identical to oldpath, and oldpath will be removed.
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func RenameFileWithReplacement(oldpath, newpath string) error {
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return os.Rename(oldpath, newpath)
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}
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// RenameFile renames oldpath to newpath, returning an error if newpath already
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// exists. If this function returns successfully, the contents of newpath will
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// be identical to oldpath, and oldpath will be removed.
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func RenameFile(oldpath, newpath string) error {
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if _, err := os.Stat(newpath); err == nil {
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return newFileExistsError(newpath)
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}
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return os.Rename(oldpath, newpath)
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}
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// CreateFile creates a new file at newpath, returning an error if newpath already
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// exists
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func CreateFile(newpath string) (*os.File, error) {
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if _, err := os.Stat(newpath); err == nil {
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return nil, newFileExistsError(newpath)
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}
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return os.Create(newpath)
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}
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// DiskUsage returns disk usage of disk of path
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func DiskUsage(path string) (*DiskStatus, error) {
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fs := unix.Statfs_t{}
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if err := unix.Statfs(path, &fs); err != nil {
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return nil, err
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}
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var disk DiskStatus
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disk.All = fs.Blocks * uint64(fs.Bsize)
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disk.Avail = uint64(fs.Bavail) * uint64(fs.Bsize)
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disk.Free = fs.Bfree * uint64(fs.Bsize)
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disk.Used = disk.All - disk.Free
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return &disk, nil
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}
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