1 /* $NetBSD: util.c,v 1.12 2005/02/17 17:09:48 xtraeme 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
35 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94";
36 #else
37 __RCSID("$NetBSD: util.c,v 1.12 2005/02/17 17:09:48 xtraeme 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
55 char *
ttoa(char * buf,size_t len,time_t tval)56 ttoa(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
70 int
atot(const char * p,time_t * store)71 atot(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
98 const char *
ok_shell(const char * name)99 ok_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