File: [local] / src / usr.bin / leave / leave.c (download)
Revision 1.17, Fri Oct 9 01:37:08 2015 UTC (8 years, 8 months ago) by deraadt
Branch: MAIN
CVS Tags: OPENBSD_6_2_BASE, OPENBSD_6_2, OPENBSD_6_1_BASE, OPENBSD_6_1, OPENBSD_6_0_BASE, OPENBSD_6_0, OPENBSD_5_9_BASE, OPENBSD_5_9 Changes since 1.16: +3 -3 lines
Change all tame callers to namechange to pledge(2).
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/* $OpenBSD: leave.c,v 1.17 2015/10/09 01:37:08 deraadt Exp $ */
/* $NetBSD: leave.c,v 1.4 1995/07/03 16:50:13 phil Exp $ */
/*
* Copyright (c) 1980, 1988, 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.
* 3. 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.
*/
#include <sys/time.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
static __dead void usage(void);
static void doalarm(u_int secs);
#define SECOND 1
#define MINUTE (SECOND * 60)
#define FIVEMIN (5 * MINUTE)
#define HOUR (MINUTE * 60)
/*
* leave [[+]hhmm]
*
* Reminds you when you have to leave.
* Leave prompts for input and goes away if you hit return.
* It nags you like a mother hen.
*/
int
main(int argc, char *argv[])
{
u_int secs;
int hours, minutes;
char c, *cp;
struct tm *t;
time_t now;
int plusnow = 0, twentyfour;
char buf[50];
if (pledge("stdio proc", NULL) == -1)
err(1, "pledge");
if (setvbuf(stdout, NULL, _IOLBF, 0) != 0)
errx(1, "Cannot set stdout to line buffered.");
if (argc < 2) {
(void)fputs("When do you have to leave? ", stdout);
cp = fgets(buf, sizeof(buf), stdin);
if (cp == NULL || *cp == '\n')
exit(0);
} else if (argc > 2)
usage();
else
cp = argv[1];
if (*cp == '+') {
plusnow = 1;
++cp;
}
for (hours = 0; (c = *cp) && c != '\n'; ++cp) {
if (!isdigit((unsigned char)c))
usage();
hours = hours * 10 + (c - '0');
}
minutes = hours % 100;
hours /= 100;
/* determine 24 hours mode */
twentyfour = hours > 12;
if (minutes < 0 || minutes > 59)
usage();
if (plusnow)
secs = (hours * HOUR) + (minutes * MINUTE);
else {
if (hours > 23)
usage();
(void)time(&now);
t = localtime(&now);
while (t->tm_hour > hours ||
(t->tm_hour == hours && t->tm_min >= minutes)) {
if (twentyfour)
hours += 24;
else
hours += 12;
}
secs = (hours - t->tm_hour) * HOUR;
secs += (minutes - t->tm_min) * MINUTE;
}
doalarm(secs);
exit(0);
}
static void
doalarm(u_int secs)
{
int bother;
time_t daytime;
pid_t pid;
switch (pid = fork()) {
case 0:
break;
case -1:
err(1, "Fork failed");
/* NOTREACHED */
default:
(void)time(&daytime);
daytime += secs;
printf("Alarm set for %.16s. (pid %ld)\n",
ctime(&daytime), (long)pid);
exit(0);
}
sleep(2); /* let parent print set message */
/*
* if write fails, we've lost the terminal through someone else
* causing a vhangup by logging in.
*/
if (secs >= FIVEMIN) {
sleep(secs - FIVEMIN);
if (puts("\a\aYou have to leave in 5 minutes.") == EOF)
exit(0);
secs = FIVEMIN;
}
if (secs >= MINUTE) {
sleep(secs - MINUTE);
if (puts("\a\aJust one more minute!") == EOF)
exit(0);
}
for (bother = 10; bother--;) {
sleep(MINUTE);
if (puts("\a\aTime to leave!") == EOF)
exit(0);
}
puts("\a\aThat was the last time I'll tell you. Bye.");
exit(0);
}
static __dead void
usage(void)
{
fprintf(stderr, "usage: leave [[+]hhmm]\n");
exit(1);
}