1 /* $OpenBSD: util.c,v 1.7 2003/07/01 01:01:28 avsm 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 #ifndef lint
34 #if 0
35 static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94";
36 #else
37 static char rcsid[] = "$OpenBSD: util.c,v 1.7 2003/07/01 01:01:28 avsm 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
54 char *
ttoa(char * buf,size_t len,time_t tval)55 ttoa(char *buf, size_t len, time_t tval)
56 {
57 if (tval) {
58 struct tm *tp = localtime(&tval);
59
60 (void) strftime(buf, len, "%B %d, %Y", tp);
61 buf[len - 1] = '\0';
62 } else if (len > 0)
63 *buf = '\0';
64 return (buf);
65 }
66
67 int
atot(char * p,time_t * store)68 atot(char *p, time_t *store)
69 {
70 static struct tm *lt;
71 struct tm tm;
72 time_t tval;
73 char *t;
74
75 if (!*p) {
76 *store = 0;
77 return (0);
78 }
79 if (!lt) {
80 unsetenv("TZ");
81 (void)time(&tval);
82 lt = localtime(&tval);
83 }
84 (void) memset(&tm, 0, sizeof(tm));
85 for (t = p; (t = strchr(t, ',')) != NULL; t++)
86 *t = ' ';
87 t = strptime(p, "%B %d %Y", &tm);
88 if (t == NULL || (*t != '\0' && *t != '\n'))
89 return 1;
90 *store = mktime(&tm);
91 if (*store == (time_t) -1)
92 return 1;
93 return (0);
94 }
95
96 char *
ok_shell(char * name)97 ok_shell(char *name)
98 {
99 char *p, *sh;
100
101 setusershell();
102 while ((sh = getusershell()) != NULL) {
103 if (!strcmp(name, sh))
104 return (name);
105 /* allow just shell name, but use "real" path */
106 if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
107 return (sh);
108 }
109 return (NULL);
110 }
111