// checkLicenseAgreement returns nil if it's ok to proceed with installing the
// package, as deduced from the license agreement (which might involve asking
// the user), or an error that explains the reason why installation should not
// proceed.
func checkLicenseAgreement(s *snap.Info, snapf snap.File, cur *snap.Info, ag agreer) error {
if s.LicenseAgreement != "explicit" {
return nil
}
if ag == nil {
return ErrLicenseNotAccepted
}
license, err := snapf.MetaMember("license.txt")
if err != nil || len(license) == 0 {
return ErrLicenseNotProvided
}
// don't ask for the license if
// * the previous version also asked for license confirmation, and
// * the license version is the same
if cur != nil && (cur.LicenseAgreement == "explicit") && cur.LicenseVersion == s.LicenseVersion {
return nil
}
msg := fmt.Sprintf("%s requires that you accept the following license before continuing", s.Name())
if !ag.Agreed(msg, string(license)) {
return ErrLicenseNotAccepted
}
return nil
}
// checkLicenseAgreement returns nil if it's ok to proceed with installing the
// package, as deduced from the license agreement (which might involve asking
// the user), or an error that explains the reason why installation should not
// proceed.
func (m *packageYaml) checkLicenseAgreement(ag agreer, d snap.File, currentActiveDir string) error {
if !m.ExplicitLicenseAgreement {
return nil
}
if ag == nil {
return ErrLicenseNotAccepted
}
license, err := d.MetaMember("license.txt")
if err != nil || len(license) == 0 {
return ErrLicenseNotProvided
}
oldM, err := parsePackageYamlFile(filepath.Join(currentActiveDir, "meta", "package.yaml"))
if err != nil && !os.IsNotExist(err) {
return err
}
// don't ask for the license if
// * the previous version also asked for license confirmation, and
// * the license version is the same
if err == nil && oldM.ExplicitLicenseAgreement && oldM.LicenseVersion == m.LicenseVersion {
return nil
}
msg := fmt.Sprintf("%s requires that you accept the following license before continuing", m.Name)
if !ag.Agreed(msg, string(license)) {
return ErrLicenseNotAccepted
}
return nil
}
// extractKernelAssets extracts kernel/initrd/dtb data from the given
// Snap to a versionized bootloader directory so that the bootloader
// can use it.
func extractKernelAssets(s *snap.Info, snapf snap.File, flags InstallFlags, inter progress.Meter) error {
if s.Type != snap.TypeKernel {
return fmt.Errorf("can not extract kernel assets from snap type %q", s.Type)
}
bootloader, err := findBootloader()
if err != nil {
return fmt.Errorf("can not extract kernel assets: %s", err)
}
// check if we are on a "grub" system. if so, no need to unpack
// the kernel
if oem, err := getGadget(); err == nil {
if oem.Legacy.Gadget.Hardware.Bootloader == "grub" {
return nil
}
}
// now do the kernel specific bits
blobName := filepath.Base(s.MountFile())
dstDir := filepath.Join(bootloader.Dir(), blobName)
if err := os.MkdirAll(dstDir, 0755); err != nil {
return err
}
dir, err := os.Open(dstDir)
if err != nil {
return err
}
defer dir.Close()
for _, src := range []string{s.Legacy.Kernel, s.Legacy.Initrd} {
if src == "" {
continue
}
if err := snapf.Unpack(src, dstDir); err != nil {
return err
}
src = filepath.Join(dstDir, src)
dst := filepath.Join(dstDir, dropVersionSuffix(src))
if err := os.Rename(src, dst); err != nil {
return err
}
if err := dir.Sync(); err != nil {
return err
}
}
if s.Legacy.Dtbs != "" {
src := filepath.Join(s.Legacy.Dtbs, "*")
dst := dstDir
if err := snapf.Unpack(src, dst); err != nil {
return err
}
}
return dir.Sync()
}