| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 cmds |
| |
| import ( |
| "bufio" |
| "fmt" |
| "io" |
| "os" |
| "os/exec" |
| "strings" |
| |
| "github.com/apache/shardingsphere-on-cloud/pitr/agent/internal/cons" |
| "github.com/apache/shardingsphere-on-cloud/pitr/agent/pkg/logging" |
| "github.com/apache/shardingsphere-on-cloud/pitr/agent/pkg/syncutils" |
| ) |
| |
| type Output struct { |
| LineNo uint32 // Start 1 |
| Message string |
| Error error |
| } |
| |
| // AsyncExec Async exec a command |
| func AsyncExec(name string, args ...string) (chan *Output, error) { |
| args = loadArgs(args...) |
| |
| c := "-c" |
| args = append([]string{c}, args...) |
| |
| cmd := exec.Command(name, args...) |
| logging.Debug(cmd.String()) |
| stdout, err := cmd.StdoutPipe() |
| if err != nil { |
| return nil, fmt.Errorf("can not obtain stdout pipe for command[args=%+v]:%s", args, err) |
| } |
| |
| if err = cmd.Start(); err != nil { |
| return nil, fmt.Errorf("the command is err[args=%+v]:%s", args, err) |
| } |
| |
| var ( |
| scanner = bufio.NewScanner(stdout) |
| output = make(chan *Output) |
| index = uint32(1) |
| ) |
| go func() { |
| if err = syncutils.NewRecoverFuncWithErrRet("", func() error { |
| for scanner.Scan() { |
| op := &Output{ |
| LineNo: index, |
| Message: scanner.Text(), |
| Error: err, |
| } |
| if strings.Contains(scanner.Text(), "No space left on device") { |
| op.Error = fmt.Errorf("%s", "No space left on device") |
| } |
| |
| output <- op |
| index++ |
| } |
| |
| if err = scanner.Err(); err != nil { |
| output <- &Output{ |
| LineNo: index, |
| Error: err, |
| } |
| } |
| |
| if err = cmd.Wait(); err != nil { |
| if ee, ok := err.(*exec.ExitError); ok { |
| output <- &Output{ |
| Error: fmt.Errorf("exec failure[ee=%s], wrap=%w", ee, cons.CmdOperateFailed), |
| } |
| } else { |
| output <- &Output{ |
| Error: fmt.Errorf("%s err: %s", cmd.String(), err), |
| } |
| } |
| } |
| return nil |
| })(); err != nil { |
| // only panic err |
| output <- &Output{ |
| Error: err, |
| } |
| } |
| close(output) |
| }() |
| |
| return output, nil |
| } |
| |
| // Exec exec a command |
| func Exec(name string, args ...string) (string, error) { |
| args = loadArgs(args...) |
| |
| c := "-c" |
| args = append([]string{c}, args...) |
| |
| cmd := exec.Command(name, args...) |
| logging.Debug(cmd.String()) |
| |
| stdout, err := cmd.StdoutPipe() |
| if err != nil { |
| return "", fmt.Errorf("can not obtain stdout pipe for command[args=%+v]:%s", args, err) |
| } |
| |
| stderr, err := cmd.StderrPipe() |
| if err != nil { |
| return "", fmt.Errorf("can not obtain stderr pipe for cmand[args=%+v]:%s", args, err) |
| } |
| |
| if err = cmd.Start(); err != nil { |
| return "", fmt.Errorf("the command is err[args=%+v]:%s", args, err) |
| } |
| |
| reader, err := io.ReadAll(stdout) |
| if err != nil { |
| return "", fmt.Errorf("io.ReadAll return err=%w", err) |
| } |
| |
| ereader, err := io.ReadAll(stderr) |
| if err != nil { |
| return "", fmt.Errorf("io.ReadAll return err=%w", err) |
| } |
| |
| if err = cmd.Wait(); err != nil { |
| if ee, ok := err.(*exec.ExitError); ok { |
| return "", fmt.Errorf("exec failure[ee=%s,stdout=%s], wrap:%w", ee, string(reader), cons.CmdOperateFailed) |
| } |
| return "", fmt.Errorf("%s err: %s", cmd.String(), string(ereader)) |
| } |
| return string(reader), nil |
| } |
| |
| // loadArgs if env is set, replace the command. |
| func loadArgs(args ...string) []string { |
| if len(args) > 0 { |
| arg := args[0] |
| |
| // check gs_probackup |
| if v, ok := os.LookupEnv("gs_probackup"); ok && strings.HasPrefix(arg, "gs_probackup") { |
| args[0] = strings.Replace(arg, "gs_probackup", v, 1) |
| } |
| |
| // check gs_ctrl |
| if v, ok := os.LookupEnv("gs_ctrl"); ok && strings.HasPrefix(arg, "gs_ctrl") { |
| args[0] = strings.Replace(arg, "gs_ctrl", v, 1) |
| } |
| } |
| return args |
| } |