mirror of https://github.com/k3s-io/k3s
81 lines
1.9 KiB
Go
81 lines
1.9 KiB
Go
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// Copyright 2015 CoreOS, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package fileutil
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import (
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"os"
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"path"
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"sort"
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"strings"
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"time"
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)
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func PurgeFile(dirname string, suffix string, max uint, interval time.Duration, stop <-chan struct{}) <-chan error {
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errC := make(chan error, 1)
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go func() {
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for {
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fnames, err := ReadDir(dirname)
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if err != nil {
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errC <- err
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return
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}
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newfnames := make([]string, 0)
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for _, fname := range fnames {
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if strings.HasSuffix(fname, suffix) {
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newfnames = append(newfnames, fname)
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}
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}
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sort.Strings(newfnames)
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for len(newfnames) > int(max) {
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f := path.Join(dirname, newfnames[0])
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l, err := NewLock(f)
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if err != nil {
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errC <- err
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return
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}
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err = l.TryLock()
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if err != nil {
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break
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}
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err = os.Remove(f)
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if err != nil {
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errC <- err
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return
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}
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err = l.Unlock()
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if err != nil {
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plog.Errorf("error unlocking %s when purging file (%v)", l.Name(), err)
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errC <- err
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return
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}
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err = l.Destroy()
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if err != nil {
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plog.Errorf("error destroying lock %s when purging file (%v)", l.Name(), err)
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errC <- err
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return
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}
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plog.Infof("purged file %s successfully", f)
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newfnames = newfnames[1:]
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}
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select {
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case <-time.After(interval):
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case <-stop:
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return
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}
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}
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}()
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return errC
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}
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