10 ms·

It can use the expect() system call and timeout / fail after a reasonable period of time if no bits are returned.

• justincormack 12y ago
  expect() is not a system call.
  • derekp7 12y ago
    Sorry, I meant select(). Don't know where my head was when I typed that.
    • nitrogen 12y ago
      Can you select() a system call (the new proposal) instead of an fd (the old interface)?
      • lunixbochs 12y ago
        You don't get a file handle to a syscall. You just load up some registers/stack and call a `SYSENTER`, `SYSCALL` or `INT 0x80` instruction. select is itself a separate syscall that takes in file handles or something.
        • nitrogen 12y ago
          Yeah, I know, but it wasn't clear if the parent comment was referring to select() on /dev/random, or the new syscall interface.