util.c revision 92554 
1/*-
2 * Copyright (c) 1988, 1993, 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *	This product includes software developed by the University of
16 *	California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 *    may be used to endorse or promote products derived from this software
19 *    without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35#if 0
36static char sccsid[] = "@(#)util.c	8.4 (Berkeley) 4/2/94";
37#endif
38static const char rcsid[] =
39  "$FreeBSD: head/usr.bin/chpass/util.c 92554 2002-03-18 09:49:18Z cjc $";
40#endif /* not lint */
41
42#include <sys/types.h>
43
44#include <ctype.h>
45#include <pwd.h>
46#include <stdio.h>
47#include <stdlib.h>
48#include <string.h>
49#include <time.h>
50#include <unistd.h>
51
52#include "chpass.h"
53#include "pathnames.h"
54
55static char *months[] =
56	{ "January", "February", "March", "April", "May", "June",
57	  "July", "August", "September", "October", "November",
58	  "December", NULL };
59
60char *
61ttoa(tval)
62	time_t tval;
63{
64	struct tm *tp;
65	static char tbuf[50];
66
67	if (tval) {
68		tp = localtime(&tval);
69		(void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon],
70		    tp->tm_mday, tp->tm_year + 1900);
71	}
72	else
73		*tbuf = '\0';
74	return (tbuf);
75}
76
77int
78atot(p, store)
79	char *p;
80	time_t *store;
81{
82	static struct tm *lt;
83	char *t, **mp;
84	time_t tval;
85	int day, month, year;
86
87	if (!*p) {
88		*store = 0;
89		return (0);
90	}
91	if (!lt) {
92		unsetenv("TZ");
93		(void)time(&tval);
94		lt = localtime(&tval);
95	}
96	if (!(t = strtok(p, " \t")))
97		goto bad;
98	if (isdigit(*t)) {
99		month = atoi(t);
100	} else {
101		for (mp = months;; ++mp) {
102			if (!*mp)
103				goto bad;
104			if (!strncasecmp(*mp, t, 3)) {
105				month = mp - months + 1;
106				break;
107			}
108		}
109	}
110	if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
111		goto bad;
112	day = atoi(t);
113	if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
114		goto bad;
115	year = atoi(t);
116	if (day < 1 || day > 31 || month < 1 || month > 12)
117		goto bad;
118	/* Allow two digit years 1969-2068 */
119	if (year < 69)
120		year += 2000;
121	else if (year < 100)
122		year += 1900;
123	if (year < 1969)
124bad:		return (1);
125	lt->tm_year = year - 1900;
126	lt->tm_mon = month - 1;
127	lt->tm_mday = day;
128	lt->tm_hour = 0;
129	lt->tm_min = 0;
130	lt->tm_sec = 0;
131	lt->tm_isdst = -1;
132	if ((tval = mktime(lt)) < 0)
133		return (1);
134	*store = tval;
135	return (0);
136}
137
138char *
139ok_shell(name)
140	char *name;
141{
142	char *p, *sh;
143
144	setusershell();
145	while ((sh = getusershell())) {
146		if (!strcmp(name, sh))
147			return (name);
148		/* allow just shell name, but use "real" path */
149		if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
150			return (sh);
151	}
152	return (NULL);
153}
154