1/*	$OpenBSD: util.c,v 1.13 2015/03/15 00:41:28 millert Exp $	*/
2/*	$NetBSD: util.c,v 1.4 1995/03/26 04:55:35 glass Exp $	*/
3
4/*-
5 * Copyright (c) 1988, 1993, 1994
6 *	The Regents of the University of California.  All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 * 3. Neither the name of the University nor the names of its contributors
17 *    may be used to endorse or promote products derived from this software
18 *    without specific prior written permission.
19 *
20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 * SUCH DAMAGE.
31 */
32
33#include <sys/types.h>
34
35#include <ctype.h>
36#include <pwd.h>
37#include <stdio.h>
38#include <stdlib.h>
39#include <string.h>
40#include <time.h>
41#include <unistd.h>
42
43#include "chpass.h"
44
45char *
46ttoa(char *buf, size_t len, time_t tval)
47{
48	if (tval) {
49		struct tm *tp = localtime(&tval);
50
51		(void) strftime(buf, len, "%B %d, %Y", tp);
52		buf[len - 1] = '\0';
53	} else if (len > 0)
54		*buf = '\0';
55	return (buf);
56}
57
58int
59atot(char *p, time_t *store)
60{
61	struct tm tm;
62	char *t;
63
64	if (!*p) {
65		*store = 0;
66		return (0);
67	}
68	(void) memset(&tm, 0, sizeof(tm));
69	for (t = p; (t = strchr(t, ',')) != NULL; t++)
70		*t = ' ';
71	t = strptime(p, "%B %d %Y", &tm);
72	if (t == NULL || (*t != '\0' && *t != '\n'))
73		return 1;
74	tm.tm_isdst = -1;
75	*store = mktime(&tm);
76	if (*store == (time_t) -1)
77		return 1;
78	return (0);
79}
80
81int
82ok_shell(char *name, char **out)
83{
84	char *p, *sh;
85
86	setusershell();
87	while ((sh = getusershell()) != NULL) {
88		if (!strcmp(name, sh))
89			break;
90		/* allow just shell name, but use "real" path */
91		if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
92			break;
93	}
94	if (sh && out)
95		*out = strdup(sh);
96	endusershell();
97	return (sh != NULL);
98}
99