GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/leave/leave.c Lines: 0 63 0.0 %
Date: 2016-12-06 Branches: 0 49 0.0 %

Line Branch Exec Source
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/*	$OpenBSD: leave.c,v 1.17 2015/10/09 01:37:08 deraadt Exp $	*/
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/*	$NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $	*/
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/*
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 * Copyright (c) 1980, 1988, 1993
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 *	The Regents of the University of California.  All rights reserved.
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 *
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 * Redistribution and use in source and binary forms, with or without
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 * modification, are permitted provided that the following conditions
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 * are met:
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 * 1. Redistributions of source code must retain the above copyright
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 *    notice, this list of conditions and the following disclaimer.
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 * 2. Redistributions in binary form must reproduce the above copyright
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 *    notice, this list of conditions and the following disclaimer in the
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 *    documentation and/or other materials provided with the distribution.
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 * 3. Neither the name of the University nor the names of its contributors
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 *    may be used to endorse or promote products derived from this software
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 *    without specific prior written permission.
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 *
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 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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 * SUCH DAMAGE.
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 */
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#include <sys/time.h>
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#include <ctype.h>
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#include <err.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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static __dead void	usage(void);
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static void		doalarm(u_int secs);
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#define SECOND  1
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#define MINUTE  (SECOND * 60)
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#define	FIVEMIN	(5 * MINUTE)
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#define HOUR    (MINUTE * 60)
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/*
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 * leave [[+]hhmm]
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 *
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 * Reminds you when you have to leave.
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 * Leave prompts for input and goes away if you hit return.
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 * It nags you like a mother hen.
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 */
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int
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main(int argc, char *argv[])
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{
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	u_int secs;
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	int hours, minutes;
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	char c, *cp;
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	struct tm *t;
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	time_t now;
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	int plusnow = 0, twentyfour;
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	char buf[50];
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	if (pledge("stdio proc wpath cpath rpath", NULL) == -1)
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		err(1, "pledge");
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	if (setvbuf(stdout, NULL, _IOLBF, 0) != 0)
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		errx(1, "Cannot set stdout to line buffered.");
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	if (argc < 2) {
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		(void)fputs("When do you have to leave? ", stdout);
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		cp = fgets(buf, sizeof(buf), stdin);
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		if (cp == NULL || *cp == '\n')
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			exit(0);
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	} else if (argc > 2)
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		usage();
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	else
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		cp = argv[1];
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	if (*cp == '+') {
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		plusnow = 1;
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		++cp;
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	}
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	for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
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		if (!isdigit((unsigned char)c))
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			usage();
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		hours = hours * 10 + (c - '0');
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	}
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	minutes = hours % 100;
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	hours /= 100;
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	/* determine 24 hours mode */
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	twentyfour = hours > 12;
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	if (minutes < 0 || minutes > 59)
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		usage();
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	if (plusnow)
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		secs = (hours * HOUR) + (minutes * MINUTE);
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	else {
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		if (hours > 23)
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			usage();
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		(void)time(&now);
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		t = localtime(&now);
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		while (t->tm_hour > hours ||
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		    (t->tm_hour == hours && t->tm_min >= minutes)) {
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			if (twentyfour)
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				hours += 24;
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			else
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				hours += 12;
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		}
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		secs = (hours - t->tm_hour) * HOUR;
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		secs += (minutes - t->tm_min) * MINUTE;
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	}
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	doalarm(secs);
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	exit(0);
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}
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static void
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doalarm(u_int secs)
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{
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	int bother;
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	time_t daytime;
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	pid_t pid;
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	switch (pid = fork()) {
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	case 0:
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		break;
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	case -1:
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		err(1, "Fork failed");
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		/* NOTREACHED */
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	default:
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		(void)time(&daytime);
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		daytime += secs;
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		printf("Alarm set for %.16s. (pid %ld)\n",
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		    ctime(&daytime), (long)pid);
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		exit(0);
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	}
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	sleep(2);			/* let parent print set message */
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	/*
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	 * if write fails, we've lost the terminal through someone else
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	 * causing a vhangup by logging in.
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	 */
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	if (secs >= FIVEMIN) {
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		sleep(secs - FIVEMIN);
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		if (puts("\a\aYou have to leave in 5 minutes.") == EOF)
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			exit(0);
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		secs = FIVEMIN;
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	}
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	if (secs >= MINUTE) {
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		sleep(secs - MINUTE);
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		if (puts("\a\aJust one more minute!") == EOF)
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			exit(0);
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	}
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	for (bother = 10; bother--;) {
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		sleep(MINUTE);
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		if (puts("\a\aTime to leave!") == EOF)
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			exit(0);
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	}
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	puts("\a\aThat was the last time I'll tell you.  Bye.");
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	exit(0);
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}
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static __dead void
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usage(void)
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{
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	fprintf(stderr, "usage: leave [[+]hhmm]\n");
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	exit(1);
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}