// mountOEM waits for the presence of and mounts the oem partition at oemMountPath.
func mountOEM(l *log.Logger) error {
dev := []string{oemDevicePath}
if err := systemd.WaitOnDevices(dev, "oem-cmdline"); err != nil {
l.Err("failed to wait for oem device: %v", err)
return err
}
if err := os.MkdirAll(oemMountPath, 0700); err != nil {
l.Err("failed to create oem mount point: %v", err)
return err
}
if err := l.LogOp(
func() error {
return syscall.Mount(dev[0], oemMountPath, "ext4", 0, "")
},
"mounting %q at %q", oemDevicePath, oemMountPath,
); err != nil {
return fmt.Errorf("failed to mount device %q at %q: %v",
oemDevicePath, oemMountPath, err)
}
return nil
}
func RenderFile(l *log.Logger, f types.File) *File {
var contents []byte
var err error
fetch := func() error {
contents, err = util.FetchResource(l, url.URL(f.Contents.Source))
return err
}
validate := func() error {
return util.AssertValid(f.Contents.Verification, contents)
}
decompress := func() error {
contents, err = decompressFile(l, f, contents)
return err
}
if l.LogOp(fetch, "fetching file %q", f.Path) != nil {
return nil
}
if l.LogOp(validate, "validating file contents") != nil {
return nil
}
if l.LogOp(decompress, "decompressing file contents") != nil {
return nil
}
return &File{
Path: f.Path,
Contents: []byte(contents),
Mode: os.FileMode(f.Mode),
Uid: f.User.Id,
Gid: f.Group.Id,
}
}
// umountOEM unmounts the oem partition at oemMountPath.
func umountOEM(l *log.Logger) {
l.LogOp(
func() error { return syscall.Unmount(oemMountPath, 0) },
"unmounting %q", oemMountPath,
)
}