buildkit/util/archutil/check_unix.go

52 lines
804 B
Go

// +build !windows
package archutil
import (
"bytes"
"compress/gzip"
"io"
"io/ioutil"
"os"
"os/exec"
"path/filepath"
"syscall"
)
func withChroot(cmd *exec.Cmd, dir string) {
cmd.SysProcAttr = &syscall.SysProcAttr{
Chroot: dir,
}
}
func check(bin string) error {
tmpdir, err := ioutil.TempDir("", "qemu-check")
if err != nil {
return err
}
defer os.RemoveAll(tmpdir)
pp := filepath.Join(tmpdir, "check")
r, err := gzip.NewReader(bytes.NewReader([]byte(bin)))
if err != nil {
return err
}
defer r.Close()
f, err := os.OpenFile(pp, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0700)
if err != nil {
return err
}
if _, err := io.Copy(f, r); err != nil {
f.Close()
return err
}
f.Close()
cmd := exec.Command("/check")
withChroot(cmd, tmpdir)
err = cmd.Run()
return err
}