/*
 * SPDsoft
 *
 * Simple signal example
 * Define _BSD_ for SunOS
 * Define _HPUX_SOURCE for HPUX
 */

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <errno.h>
#include <signal.h>

#ifdef _BSD_
#  include <sys/types.h>
extern char *sys_errlist[];
#  ifndef __USE_POSIX
#    define raise(s) kill(getpid(),(s)) /* not using glibc */
#  endif
#  define strerror(e) sys_errlist[(e)]
#endif

/* Prototypes */

void	rserv(int i);
void	rserv5(int i);
int main ( int	argc, char	*argv[]);

/* Globals */

#define MY_SIG	SIGINT
/*#define MY_SIG	SIGUSR1*/

char	*progname;
int		count=0;

void	rserv(int i)
{
	/* set MY_SIG again */

	if ( SIG_ERR == signal(MY_SIG, rserv))
		fprintf(stderr,"%s: Error: %s\n",progname,strerror(errno));

	printf("%s: Hola! (signal %d)\n", progname,  i);
	fflush(stdout);
	count ++;
	return;
}
void	rserv5(int i)
{
	printf("%s: Hola! 5 (signal %d)\n", progname,  i);
	fflush(stdout);
	sleep(5);
	count ++;
	return;
}

int main ( int	argc, char	*argv[])
{

	int	i;
	unsigned int s;

	void (*sys)(int);

	if (argc != 3)
	{
		printf ("Uso: %s nloops sleep\n", argv[0]);
		exit(1);
	}

	progname = argv[0];
	s=atoi(argv[2]);

	fprintf(stderr,"%s: %p\n", argv[0], sys);
	if ( SIG_ERR == (sys = signal(MY_SIG, rserv)))
		fprintf(stderr,"%s: Error: %s\n",argv[0],strerror(errno));
	else
		fprintf(stderr,"%s: %p\n", argv[0], sys);

	for (i = atoi(argv[1]); i > 0; i--)
	{
		sleep(s);
		
		raise(MY_SIG);
	}
	signal(MY_SIG, sys );

	sigset(MY_SIG, rserv5);
	sighold(MY_SIG);
	printf("b %d\n",count);
	sigpause(MY_SIG);
	printf("c %d\n",count);
	printf("in sleep\n");
	sighold(MY_SIG);
	sleep(5);
	printf("out sleep\n");
	sigpause(MY_SIG);
	printf("d %d\n",count);

	puts("bye");
	return 0;
}