NetBSD/usr.bin/at/stime.c

117 lines
3.4 KiB
C

/* $NetBSD: stime.c,v 1.7 2008/07/21 14:19:21 lukem Exp $ */
/*
* Copyright (c) 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/cdefs.h>
#ifndef lint
__COPYRIGHT("@(#) Copyright (c) 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "from: @(#)touch.c 8.2 (Berkeley) 4/28/95";
#endif
__RCSID("$NetBSD: stime.c,v 1.7 2008/07/21 14:19:21 lukem Exp $");
#endif /* not lint */
#include <err.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <tzfile.h>
#include "stime.h"
#define ATOI2(s) ((s) += 2, ((s)[-2] - '0') * 10 + ((s)[-1] - '0'))
time_t
stime(char *arg)
{
struct tm *t;
time_t tmptime;
int yearset;
char *p;
/* Start with the current time. */
if (time(&tmptime) == (time_t)-1)
err(EXIT_FAILURE, "time");
if ((t = localtime(&tmptime)) == NULL)
err(EXIT_FAILURE, "localtime");
/* [[CC]YY]MMDDhhmm[.SS] */
if ((p = strchr(arg, '.')) == NULL)
t->tm_sec = 0; /* Seconds defaults to 0. */
else {
if (strlen(p + 1) != 2)
goto terr;
*p++ = '\0';
t->tm_sec = ATOI2(p);
}
yearset = 0;
switch (strlen(arg)) {
case 12: /* CCYYMMDDhhmm */
t->tm_year = ATOI2(arg) * 100 - TM_YEAR_BASE;
yearset = 1;
/* FALLTHROUGH */
case 10: /* YYMMDDhhmm */
if (yearset) {
t->tm_year += ATOI2(arg);
} else {
yearset = ATOI2(arg);
t->tm_year = conv_2dig_year(yearset) - TM_YEAR_BASE;
}
/* FALLTHROUGH */
case 8: /* MMDDhhmm */
t->tm_mon = ATOI2(arg);
--t->tm_mon; /* Convert from 01-12 to 00-11 */
/* FALLTHROUGH */
case 6:
t->tm_mday = ATOI2(arg);
/* FALLTHROUGH */
case 4:
t->tm_hour = ATOI2(arg);
/* FALLTHROUGH */
case 2:
t->tm_min = ATOI2(arg);
break;
default:
goto terr;
}
t->tm_isdst = -1; /* Figure out DST. */
tmptime = mktime(t);
if (tmptime == (time_t)-1) {
terr: errx(EXIT_FAILURE,
"out of range or illegal time specification: [[CC]YY]MMDDhhmm[.SS]");
}
return tmptime;
}