1/*	$NetBSD: util.c,v 1.11 2003/08/07 11:13:19 agc Exp $	*/
2
3/*-
4 * Copyright (c) 1988, 1993, 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33#ifndef lint
34#if 0
35static char sccsid[] = "@(#)util.c	8.4 (Berkeley) 4/2/94";
36#else
37__RCSID("$NetBSD: util.c,v 1.11 2003/08/07 11:13:19 agc Exp $");
38#endif
39#endif /* not lint */
40
41#include <sys/types.h>
42
43#include <ctype.h>
44#include <pwd.h>
45#include <stdio.h>
46#include <stdlib.h>
47#include <string.h>
48#include <time.h>
49#include <tzfile.h>
50#include <unistd.h>
51
52#include "chpass.h"
53#include "pathnames.h"
54
55char *
56ttoa(char *buf, size_t len, time_t tval)
57{
58
59	if (tval) {
60		struct tm *tp = localtime(&tval);
61
62		(void) strftime(buf, len, "%B %d, %Y", tp);
63		buf[len - 1] = '\0';
64	}
65	else if (len > 0)
66		*buf = '\0';
67	return (buf);
68}
69
70int
71atot(const char *p, time_t *store)
72{
73	static struct tm *lt;
74	struct tm tm;
75	char *t;
76	time_t tval;
77
78	if (!*p) {
79		*store = 0;
80		return (0);
81	}
82	if (!lt) {
83		unsetenv("TZ");
84		(void)time(&tval);
85		lt = localtime(&tval);
86	}
87	(void) memset(&tm, 0, sizeof(tm));
88	while ((t = strchr(p, ',')) != NULL)
89		*t = ' ';
90	t = strptime(p, "%B %d %Y", &tm);
91	if (t == NULL || (*t != '\0' && *t != '\n'))
92		return 1;
93	if ((*store = mktime(&tm)) == (time_t) -1)
94		return 1;
95	return (0);
96}
97
98const char *
99ok_shell(const char *name)
100{
101	char *p;
102	const char *sh;
103
104	setusershell();
105	while ((sh = getusershell()) != NULL) {
106		if (!strcmp(name, sh))
107			return (name);
108		/* allow just shell name, but use "real" path */
109		if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
110			return (sh);
111	}
112	return (NULL);
113}
114