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reinstall.go
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reinstall.go
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package main
import (
"fmt"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"strings"
"time"
"github.com/Symantec/Dominator/lib/log"
)
func reinstallSubcommand(args []string, logger log.DebugLogger) error {
err := reinstall(logger)
if err != nil {
return fmt.Errorf("Error reinstalling: %s", err)
}
return nil
}
func getHostname() (string, error) {
cmd := exec.Command("hostname", "-f")
if stdout, err := cmd.Output(); err != nil {
return "", err
} else {
return strings.TrimSpace(string(stdout)), nil
}
}
func reinstall(logger log.DebugLogger) error {
kexec, err := exec.LookPath("kexec")
if err != nil {
return err
}
hostname, err := getHostname()
if err != nil {
return err
}
rootDir, err := ioutil.TempDir("", "kexec")
if err != nil {
return err
}
defer os.RemoveAll(rootDir)
_, initrdFile, err := makeInstallerDirectory(hostname, rootDir, logger)
if err != nil {
return err
}
logger.Println("running kexec in 5 seconds...")
time.Sleep(time.Second * 5)
var command string
var args []string
if os.Geteuid() == 0 {
command = kexec
} else {
command = "sudo"
args = []string{kexec}
}
args = append(args, "-l", filepath.Join(rootDir, "vmlinuz"),
"--append=console=tty0 console=ttyS0,115200n8",
"--console-serial", "--serial-baud=115200",
"--initrd="+initrdFile, "-f")
cmd := exec.Command(command, args...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
return cmd.Run()
}