vitess.io/vitess@v0.16.2/go/cmd/tools.go (about)

     1  /*
     2  Copyright 2019 The Vitess Authors
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8  	http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  package cmd
    17  
    18  import (
    19  	"fmt"
    20  	"os"
    21  	"os/exec"
    22  	"strings"
    23  	"syscall"
    24  )
    25  
    26  // DetachFromTerminalAndExit allows a command line program to detach from the terminal and continue running
    27  // even if the parent process is terminated
    28  func DetachFromTerminalAndExit() {
    29  	args := os.Args[1:]
    30  	i := 0
    31  	for ; i < len(args); i++ {
    32  		if strings.HasPrefix(args[i], "-detach") || strings.HasPrefix(args[i], "--detach") {
    33  			args[i] = "--detach=false"
    34  			break
    35  		}
    36  	}
    37  	cmd := exec.Command(os.Args[0], args...)
    38  	cmd.Stdin = os.Stdin
    39  	cmd.Stdout = os.Stdout
    40  	cmd.Stderr = os.Stderr
    41  	_ = cmd.Start()
    42  	fmt.Println("[PID]", cmd.Process.Pid)
    43  	os.Exit(0)
    44  }
    45  
    46  // IsRunningAsRoot checks if a component is being ran as root
    47  func IsRunningAsRoot() bool {
    48  	return syscall.Geteuid() == 0
    49  }