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// Copyright (c) 2012 The Grumble Authors
// The use of this source code is goverened by a BSD-style
// license that can be found in the LICENSE-file.
package main
import (
"io/ioutil"
"os"
"path/filepath"
"strconv"
"github.com/golang/protobuf/proto"
"mumble.info/grumble/pkg/replacefile"
)
func (server *Server) freezeToFile() (err error) {
// Close the log file, if it's open
if server.freezelog != nil {
err = server.freezelog.Close()
if err != nil {
return err
}
server.freezelog = nil
}
// Make sure the whole server is synced to disk
fs, err := server.Freeze()
if err != nil {
return err
}
f, err := ioutil.TempFile(filepath.Join(Args.DataDir, "servers", strconv.FormatInt(server.Id, 10)), ".main.fz_")
if err != nil {
return err
}
buf, err := proto.Marshal(fs)
if err != nil {
return err
}
_, err = f.Write(buf)
if err != nil {
return err
}
err = f.Sync()
if err != nil {
return err
}
err = f.Close()
if err != nil {
return err
}
src := f.Name()
dst := filepath.Join(Args.DataDir, "servers", strconv.FormatInt(server.Id, 10), "main.fz")
backup := filepath.Join(Args.DataDir, "servers", strconv.FormatInt(server.Id, 10), "backup.fz")
err = replacefile.ReplaceFile(dst, src, backup, replacefile.Flag(0))
// If the dst file does not exist (as in, on first launch)
// fall back to os.Rename. ReplaceFile does not work if the
// dst file is not there.
if os.IsNotExist(err) {
err = os.Rename(src, dst)
if err != nil {
return err
}
}
return nil
}
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