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package main
import (
"fmt"
"os"
"os/exec"
"path/filepath"
"syscall"
)
func main() {
command := os.Args[3]
args := os.Args[4:len(os.Args)]
tmpDir := "/tmp/mydocker"
cmd := exec.Command(command, args...)
cmd.Stdin = os.Stdin
cmd.Stdout = os.Stdout
cmd.Stderr = os.Stderr
_ = os.Mkdir(tmpDir, 0755)
err := exec.Command("mkdir", "-p", filepath.Join(tmpDir, filepath.Dir(command))).Run()
if err != nil {
fmt.Printf("Err: %v", err)
os.Exit(1)
}
err = exec.Command("cp", command, filepath.Join(tmpDir, command)).Run()
if err != nil {
fmt.Printf("Err: %v", err)
os.Exit(1)
}
cmd.SysProcAttr = &syscall.SysProcAttr{
Chroot: tmpDir,
Cloneflags: syscall.CLONE_NEWPID,
}
err = cmd.Run()
if err != nil {
if exitError, ok := err.(*exec.ExitError); ok {
os.Exit(exitError.ExitCode())
} else {
fmt.Printf("Err: %v", err)
os.Exit(1)
}
}
}
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