Signal handler arguments

[Ulrich Drepper]

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Ralf Baechle wrote:

>   handler(signr, 0, struct sigcontext *)
> 
> The rt-signal handlers (setup with SA_SIGINFO) get invoked as:
> 
>   handler(signr, struct siginfo *, struct ucontext *)
> 
> What do applicable standards say about the arguments passed to signal
> handlers? 

  void (*sa_handler)(int)  What to do on receipt of signal.
  sigset_t sa_mask         Set of signals to be blocked during execution
                           of the signal handling function.
  int sa_flags             Special flags.
  void (*)(int, siginfo_t *, void *) sa_sigaction
                           Pointer to signal handler function or one
                           of the macros SIG_IGN or SIG_DFL.

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