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62 lines
1.6 KiB
Go
62 lines
1.6 KiB
Go
// -*- Mode: Go; indent-tabs-mode: t -*-
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/*
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* Copyright (C) 2020 Canonical Ltd
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 3 as
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* published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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package osutil
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import (
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"fmt"
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"syscall"
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"github.com/snapcore/snapd/strutil"
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)
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var syscallStatfs = syscall.Statfs
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type NotEnoughDiskSpaceError struct {
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Path string
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Delta int64
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}
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func (e *NotEnoughDiskSpaceError) Error() string {
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return fmt.Sprintf("insufficient space in %q, at least %s more is required", e.Path, strutil.SizeToStr(e.Delta))
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}
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// diskFree returns free disk space for the given path
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func diskFree(path string) (uint64, error) {
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var st syscall.Statfs_t
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if err := syscallStatfs(path, &st); err != nil {
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return 0, err
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}
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// available blocks * block size
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return st.Bavail * uint64(st.Bsize), nil
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}
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// CheckFreeSpace checks if there is enough disk space for the given path
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func CheckFreeSpace(path string, minSize uint64) error {
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free, err := diskFree(path)
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if err != nil {
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return err
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}
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if free < minSize {
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delta := int64(minSize - free)
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return &NotEnoughDiskSpaceError{Path: path, Delta: delta}
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}
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return nil
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}
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