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package guestdisk
import (
"fmt"
"os"
"github.com/johnandersen777/socialweb-computer-kcp/internal/guestseed"
)
func Clone(src, dst string) error {
in, err := os.Open(src)
if err != nil {
return fmt.Errorf("guestdisk: %w", err)
}
defer in.Close()
out, err := os.OpenFile(dst, os.O_CREATE|os.O_EXCL|os.O_WRONLY, 0o600)
if err != nil {
return fmt.Errorf("guestdisk: %w", err)
}
if err := cloneInto(out, in); err != nil {
out.Close()
os.Remove(dst)
return fmt.Errorf("guestdisk: copying %s to %s: %w", src, dst, err)
}
return out.Close()
}
func GrowTo(path string, mib int) error {
if mib <= 0 {
return nil
}
st, err := os.Stat(path)
if err != nil {
return fmt.Errorf("guestdisk: %w", err)
}
want := int64(mib) << 20
if st.Size() >= want {
return nil
}
if err := os.Truncate(path, want); err != nil {
return fmt.Errorf("guestdisk: growing %s to %d MiB: %w", path, mib, err)
}
return nil
}
func WriteSeed(path string, userData, metaData, networkConfig []byte) error {
return guestseed.WriteFile(path, guestseed.Seed{UserData: userData, MetaData: metaData, NetworkConfig: networkConfig})
}
