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- /*-
- * Copyright (c) 1988 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 5.14 (Berkeley) 2/12/91";
- #endif /* not lint */
-
- #include <sys/types.h>
- #include <sys/time.h>
- #include <tzfile.h>
- #include <pwd.h>
- #include <stdio.h>
- #include <string.h>
- #include <ctype.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, 19%d", months[tp->tm_mon],
- tp->tm_mday, tp->tm_year);
- }
- else
- *tbuf = '\0';
- return(tbuf);
- }
-
- atot(p, store)
- char *p;
- time_t *store;
- {
- register char *t, **mp;
- static struct tm *lt;
- time_t tval, time();
- 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)
- register char *name;
- {
- register char *p, *sh;
- char *getusershell();
-
- setusershell();
- while (sh = getusershell()) {
- if (!strcmp(name, sh))
- return(name);
- /* allow just shell name, but use "real" path */
- if ((p = rindex(sh, '/')) && !strcmp(name, p + 1))
- return(sh);
- }
- return(NULL);
- }
-