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/*-
* Copyright (c) 1988, 1993, 1994
* 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 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[] = "@(#)util.c 8.4 (Berkeley) 4/2/94";
#endif /* not lint */
#include <sys/types.h>
#include <ctype.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <tzfile.h>
#include <unistd.h>
#include "chpass.h"
#include "pathnames.h"
static int dmsize[] =
{ -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
static char *months[] =
{ "January", "February", "March", "April", "May", "June",
"July", "August", "September", "October", "November",
"December", NULL };
char *
ttoa(tval)
time_t tval;
{
struct tm *tp;
static char tbuf[50];
if (tval) {
tp = localtime(&tval);
(void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon],
tp->tm_mday, tp->tm_year + TM_YEAR_BASE);
}
else
*tbuf = '\0';
return (tbuf);
}
int
atot(p, store)
char *p;
time_t *store;
{
static struct tm *lt;
char *t, **mp;
time_t tval;
int day, month, year;
if (!*p) {
*store = 0;
return (0);
}
if (!lt) {
unsetenv("TZ");
(void)time(&tval);
lt = localtime(&tval);
}
if (!(t = strtok(p, " \t")))
goto bad;
for (mp = months;; ++mp) {
if (!*mp)
goto bad;
if (!strncasecmp(*mp, t, 3)) {
month = mp - months + 1;
break;
}
}
if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
goto bad;
day = atoi(t);
if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
goto bad;
year = atoi(t);
if (day < 1 || day > 31 || month < 1 || month > 12 || !year)
goto bad;
if (year < 100)
year += TM_YEAR_BASE;
if (year <= EPOCH_YEAR)
bad: return (1);
tval = isleap(year) && month > 2;
for (--year; year >= EPOCH_YEAR; --year)
tval += isleap(year) ?
DAYSPERLYEAR : DAYSPERNYEAR;
while (--month)
tval += dmsize[month];
tval += day;
tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN;
tval -= lt->tm_gmtoff;
*store = tval;
return (0);
}
char *
ok_shell(name)
char *name;
{
char *p, *sh;
setusershell();
while (sh = getusershell()) {
if (!strcmp(name, sh))
return (name);
/* allow just shell name, but use "real" path */
if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
return (sh);
}
return (NULL);
}
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