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/***********************************************************************/
/* */
/* Caml Special Light */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1995 Institut National de Recherche en Informatique et */
/* Automatique. Distributed only by permission. */
/* */
/***********************************************************************/
/* $Id$ */
/* To determine the semantics of signal handlers
(System V: signal is reset to default behavior on entrance to the handler
BSD: signal handler remains active). */
#include <stdio.h>
#include <signal.h>
/* Find a signal that is ignored by default */
#ifdef SIGCHLD
#define IGNSIG SIGCHLD
#else
#ifdef SIGIO
#define IGNSIG SIGIO
#else
#ifdef SIGCLD
#define IGNSIG SIGCLD
#else
#ifdef SIGPWR
#define IGNSIG SIGPWR
#endif
#endif
#endif
#endif
#ifdef IGNSIG
int counter;
void sig_handler(dummy)
int dummy;
{
counter++;
}
int main(argc, argv)
int argc;
char ** argv;
{
signal(IGNSIG, sig_handler);
counter = 0;
kill(getpid(), IGNSIG);
kill(getpid(), IGNSIG);
return (counter == 2 ? 0 : 1);
}
#else
/* If no suitable signal was found, assume System V */
int main(argc, argv)
int argc;
char ** argv;
{
return 1;
}
#endif
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