Skip to content
Permalink
Branch: master
Find file Copy path
Find file Copy path
Fetching contributors…
Cannot retrieve contributors at this time
89 lines (83 sloc) 2.36 KB
// Copyright 2015 The etcd Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package fileutil
import (
"os"
"path/filepath"
"sort"
"strings"
"time"
"go.uber.org/zap"
)
func PurgeFile(lg *zap.Logger, dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}) <-chan error {
return purgeFile(lg, dirname, suffix, max, interval, stop, nil)
}
// purgeFile is the internal implementation for PurgeFile which can post purged files to purgec if non-nil.
func purgeFile(lg *zap.Logger, dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}, purgec chan<- string) <-chan error {
errC := make(chan error, 1)
go func() {
for {
fnames, err := ReadDir(dirname)
if err != nil {
errC <- err
return
}
newfnames := make([]string, 0)
for _, fname := range fnames {
if strings.HasSuffix(fname, suffix) {
newfnames = append(newfnames, fname)
}
}
sort.Strings(newfnames)
fnames = newfnames
for len(newfnames) > int(max) {
f := filepath.Join(dirname, newfnames[0])
l, err := TryLockFile(f, os.O_WRONLY, PrivateFileMode)
if err != nil {
break
}
if err = os.Remove(f); err != nil {
errC <- err
return
}
if err = l.Close(); err != nil {
if lg != nil {
lg.Warn("failed to unlock/close", zap.String("path", l.Name()), zap.Error(err))
} else {
plog.Errorf("error unlocking %s when purging file (%v)", l.Name(), err)
}
errC <- err
return
}
if lg != nil {
lg.Info("purged", zap.String("path", f))
} else {
plog.Infof("purged file %s successfully", f)
}
newfnames = newfnames[1:]
}
if purgec != nil {
for i := 0; i < len(fnames)-len(newfnames); i++ {
purgec <- fnames[i]
}
}
select {
case <-time.After(interval):
case <-stop:
return
}
}
}()
return errC
}
You can’t perform that action at this time.