lnd.xprv/healthcheck/diskcheck.go
Oliver Gugger 35c1fad517
server+healthcheck: rename function, add absolute disk space function
With this commit we rename the existing AvailableDiskSpace function to
its correct name AvailableDiskSpaceRatio as it only returns a ratio. We
then go ahead and add a new function that returns the actual number of
free bytes available on a file system.

This also fixes some comments and always returns an error instead of
panicking.
2020-11-13 10:19:50 +01:00

34 lines
894 B
Go

// +build !windows,!solaris,!netbsd,!openbsd
package healthcheck
import "syscall"
// AvailableDiskSpaceRatio returns ratio of available disk space to total
// capacity.
func AvailableDiskSpaceRatio(path string) (float64, error) {
s := syscall.Statfs_t{}
err := syscall.Statfs(path, &s)
if err != nil {
return 0, err
}
// Calculate our free blocks/total blocks to get our total ratio of
// free blocks.
return float64(s.Bfree) / float64(s.Blocks), nil
}
// AvailableDiskSpace returns the available disk space in bytes of the given
// file system.
func AvailableDiskSpace(path string) (uint64, error) {
s := syscall.Statfs_t{}
err := syscall.Statfs(path, &s)
if err != nil {
return 0, err
}
// Some OSes have s.Bavail defined as int64, others as uint64, so we
// need the explicit type conversion here.
return uint64(s.Bavail) * uint64(s.Bsize), nil // nolint:unconvert
}