libgocryptfs/pathfs_frontend/compat_linux.go

19 lines
551 B
Go

package pathfs_frontend
import "syscall"
// prealloc - preallocate space without changing the file size. This prevents
// us from running out of space in the middle of an operation.
func prealloc(fd int, off int64, len int64) (err error) {
for {
err = syscall.Fallocate(fd, FALLOC_FL_KEEP_SIZE, off, len)
if err == syscall.EINTR {
// fallocate, like many syscalls, can return EINTR. This is not an
// error and just signifies that the operation was interrupted by a
// signal and we should try again.
continue
}
return err
}
}