msgs.c

压缩包中包含LINUX下多个命令的源码

/*
 * Copyright (c) 1983, 1993
 *	The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)msgs.c	8.1 (Berkeley) 6/6/93";
#endif /* not lint */

/*
 * A package to display what is happening every MSG_INTERVAL seconds
 * if we are slow connecting.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#ifdef TIME_WITH_SYS_TIME
# include <sys/time.h>
# include <time.h>
#else
# ifdef HAVE_SYS_TIME_H
#  include <sys/time.h>
# else
#  include <time.h>
# endif
#endif
#include <signal.h>
#include <stdio.h>
#include "talk.h"

#define MSG_INTERVAL 4

char	*current_state;
int	current_line = 0;

void
disp_msg(int sig)
{
	message(current_state);
}

int
start_msgs()
{
	struct itimerval itimer;

	message(current_state);
	signal(SIGALRM, disp_msg);
	itimer.it_value.tv_sec = itimer.it_interval.tv_sec = MSG_INTERVAL;
	itimer.it_value.tv_usec = itimer.it_interval.tv_usec = 0;
	setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
}

int
end_msgs()
{
	struct itimerval itimer;

	timerclear(&itimer.it_value);
	timerclear(&itimer.it_interval);
	setitimer(ITIMER_REAL, &itimer, (struct itimerval *)0);
	signal(SIGALRM, SIG_DFL);
}