150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/*-
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* Copyright (c) 1988, 1993, 1994
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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. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. 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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#ifndef lint
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static const char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94";
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#endif /* not lint */
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <ctype.h>
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#include <pwd.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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#include <unistd.h>
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#include "chpass.h"
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#include "pathnames.h"
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static const char *months[] =
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{ "January", "February", "March", "April", "May", "June",
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"July", "August", "September", "October", "November",
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"December", NULL };
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char *
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ttoa(time_t tval)
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{
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struct tm *tp;
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static char tbuf[50];
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if (tval) {
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tp = localtime(&tval);
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(void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon],
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tp->tm_mday, tp->tm_year + 1900);
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}
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else
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*tbuf = '\0';
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return (tbuf);
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}
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int
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atot(char *p, time_t *store)
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{
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static struct tm *lt;
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char *t;
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const char **mp;
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time_t tval;
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int day, month, year;
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if (!*p) {
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*store = 0;
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return (0);
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}
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if (!lt) {
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unsetenv("TZ");
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(void)time(&tval);
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lt = localtime(&tval);
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}
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if (!(t = strtok(p, " \t")))
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goto bad;
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if (isdigit(*t)) {
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month = atoi(t);
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} else {
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for (mp = months;; ++mp) {
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if (!*mp)
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goto bad;
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if (!strncasecmp(*mp, t, 3)) {
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month = mp - months + 1;
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break;
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}
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}
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}
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if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
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goto bad;
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day = atoi(t);
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if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
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goto bad;
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year = atoi(t);
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if (day < 1 || day > 31 || month < 1 || month > 12)
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goto bad;
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/* Allow two digit years 1969-2068 */
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if (year < 69)
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year += 2000;
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else if (year < 100)
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year += 1900;
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if (year < 1969)
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bad: return (1);
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lt->tm_year = year - 1900;
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lt->tm_mon = month - 1;
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lt->tm_mday = day;
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lt->tm_hour = 0;
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lt->tm_min = 0;
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lt->tm_sec = 0;
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lt->tm_isdst = -1;
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if ((tval = mktime(lt)) < 0)
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return (1);
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*store = tval;
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return (0);
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}
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char *
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ok_shell(char *name)
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{
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char *p, *sh;
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setusershell();
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while ((sh = getusershell())) {
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if (!strcmp(name, sh))
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return (name);
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/* allow just shell name, but use "real" path */
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if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
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return (sh);
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}
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return (NULL);
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}
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