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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2015-2016 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
package asserts
import (
"fmt"
"os"
"path/filepath"
"github.com/snapcore/snapd/osutil"
)
// utilities to read/write fs entries
func ensureTop(path string) error {
err := os.MkdirAll(path, 0775)
if err != nil {
return fmt.Errorf("cannot create assert storage root: %v", err)
}
info, err := os.Stat(path)
if err != nil {
return fmt.Errorf("cannot create assert storage root: %v", err)
}
if info.Mode().Perm()&0002 != 0 {
return fmt.Errorf("assert storage root unexpectedly world-writable: %v", path)
}
return nil
}
func atomicWriteEntry(data []byte, secret bool, top string, subpath ...string) error {
fpath := filepath.Join(top, filepath.Join(subpath...))
dir := filepath.Dir(fpath)
err := os.MkdirAll(dir, 0775)
if err != nil {
return err
}
fperm := 0664
if secret {
fperm = 0600
}
return osutil.AtomicWriteFile(fpath, data, os.FileMode(fperm), 0)
}
func entryExists(top string, subpath ...string) bool {
fpath := filepath.Join(top, filepath.Join(subpath...))
return osutil.FileExists(fpath)
}
func readEntry(top string, subpath ...string) ([]byte, error) {
fpath := filepath.Join(top, filepath.Join(subpath...))
return os.ReadFile(fpath)
}
func removeEntry(top string, subpath ...string) error {
fpath := filepath.Join(top, filepath.Join(subpath...))
return os.Remove(fpath)
}
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