Example #1
0
File: run.go Project: yuuki/droot
func createDevices(rootDir string, uid, gid int) error {
	nullDir := fp.Join(rootDir, os.DevNull)
	if err := osutil.Mknod(nullDir, unix.S_IFCHR|uint32(os.FileMode(0666)), 1*256+3); err != nil {
		return err
	}

	if err := os.Lchown(nullDir, uid, gid); err != nil {
		log.Debugf("Failed to lchown %s: %s\n", nullDir, err)
		return err
	}

	zeroDir := fp.Join(rootDir, "/dev/zero")
	if err := osutil.Mknod(zeroDir, unix.S_IFCHR|uint32(os.FileMode(0666)), 1*256+3); err != nil {
		return err
	}

	if err := os.Lchown(zeroDir, uid, gid); err != nil {
		log.Debugf("Failed to lchown %s: %s\n", zeroDir, err)
		return err
	}

	for _, f := range []string{"/dev/random", "/dev/urandom"} {
		randomDir := fp.Join(rootDir, f)
		if err := osutil.Mknod(randomDir, unix.S_IFCHR|uint32(os.FileMode(0666)), 1*256+9); err != nil {
			return err
		}

		if err := os.Lchown(randomDir, uid, gid); err != nil {
			log.Debugf("Failed to lchown %s: %s\n", randomDir, err)
			return err
		}
	}

	return nil
}
Example #2
0
// Mknod unless path does not exists.
func Mknod(path string, mode uint32, dev int) error {
	if ExistsFile(path) {
		return nil
	}

	log.Debugf("mknod %s %d %d", path, mode, dev)
	if err := unix.Mknod(path, mode, dev); err != nil {
		return err
	}
	return nil
}
Example #3
0
// Symlink, but ignore already exists file.
func Symlink(oldname, newname string) error {
	log.Debug("symlink", oldname, newname)
	if err := os.Symlink(oldname, newname); err != nil {
		// Ignore already created symlink
		if _, ok := err.(*os.LinkError); !ok {
			log.Debugf("Failed to symlink %s %s: %s", oldname, newname, err)
			return err
		}
	}
	return nil
}
Example #4
0
func RunCmd(name string, arg ...string) error {
	log.Debug("runcmd: ", name, arg)
	out, err := exec.Command(name, arg...).CombinedOutput()
	if len(out) > 0 {
		log.Debug(string(out))
	}
	if err != nil {
		log.Debugf("Failed to exec %s %s: %s", name, arg, err)
		return err
	}
	return nil
}
Example #5
0
func IsDirEmpty(dir string) bool {
	f, err := os.Open(dir)
	if err != nil {
		log.Debugf("Failed to open %s: %s\n", dir, err)
		return false
	}
	defer f.Close()

	_, err = f.Readdirnames(1)
	if err == io.EOF {
		return true
	}
	return false
}
Example #6
0
func Setuid(id int) error {
	log.Debugf("setuid %d\n", id)
	return system.Setuid(id)
}