/
setuid.go
49 lines (41 loc) · 996 Bytes
/
setuid.go
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package cmd
import (
"fmt"
"log"
"os"
"io/fs"
"github.com/kardianos/osext"
"github.com/spf13/cobra"
)
func init() {
rootCmd.AddCommand(setUidCmd)
}
var setUidCmd = &cobra.Command{
Use: "setuid",
Run: func(cmd *cobra.Command, args []string) {
err := SetUid()
if err != nil {
fmt.Println("setuid failed %v.", err.Error())
}
},
}
// set self binary as root/wheel and execute bits
func SetUid() error {
self, err := osext.Executable()
if err != nil {
return err
}
err = os.Chown(self, 0, 0)
if err != nil {
log.Printf("change binary to root failed, binary %v, error %v", self, err)
return err
}
// err = syscall.Chmod(self, syscall.S_IWUSR|syscall.S_IRWXU|unix.S_IRGRP|syscall.S_IXGRP|syscall.S_IROTH|syscall.S_IXOTH|syscall.S_ISUID)
err = os.Chmod(self, 0755|fs.ModeSetuid|fs.ModeSetgid)
if err != nil {
log.Printf("change binary to root failed, binary %v error %v", self, err)
return err
}
log.Printf("set binary %v successfully", self)
return nil
}