Annotation of src/usr.bin/chpass/util.c, Revision 1.1.1.1
1.1 deraadt 1: /* $NetBSD: util.c,v 1.4 1995/03/26 04:55:35 glass 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. All advertising materials mentioning features or use of this software
16: * must display the following acknowledgement:
17: * This product includes software developed by the University of
18: * California, Berkeley and its contributors.
19: * 4. Neither the name of the University nor the names of its contributors
20: * may be used to endorse or promote products derived from this software
21: * without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
24: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
25: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
26: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
27: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
28: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
29: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
30: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
31: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
32: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
33: * SUCH DAMAGE.
34: */
35:
36: #ifndef lint
37: #if 0
38: static char sccsid[] = "@(#)util.c 8.4 (Berkeley) 4/2/94";
39: #else
40: static char rcsid[] = "$NetBSD: util.c,v 1.4 1995/03/26 04:55:35 glass Exp $";
41: #endif
42: #endif /* not lint */
43:
44: #include <sys/types.h>
45:
46: #include <ctype.h>
47: #include <pwd.h>
48: #include <stdio.h>
49: #include <stdlib.h>
50: #include <string.h>
51: #include <time.h>
52: #include <tzfile.h>
53: #include <unistd.h>
54:
55: #include "chpass.h"
56: #include "pathnames.h"
57:
58: static int dmsize[] =
59: { -1, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31 };
60: static char *months[] =
61: { "January", "February", "March", "April", "May", "June",
62: "July", "August", "September", "October", "November",
63: "December", NULL };
64:
65: char *
66: ttoa(tval)
67: time_t tval;
68: {
69: struct tm *tp;
70: static char tbuf[50];
71:
72: if (tval) {
73: tp = localtime(&tval);
74: (void)sprintf(tbuf, "%s %d, %d", months[tp->tm_mon],
75: tp->tm_mday, tp->tm_year + TM_YEAR_BASE);
76: }
77: else
78: *tbuf = '\0';
79: return (tbuf);
80: }
81:
82: int
83: atot(p, store)
84: char *p;
85: time_t *store;
86: {
87: static struct tm *lt;
88: char *t, **mp;
89: time_t tval;
90: int day, month, year;
91:
92: if (!*p) {
93: *store = 0;
94: return (0);
95: }
96: if (!lt) {
97: unsetenv("TZ");
98: (void)time(&tval);
99: lt = localtime(&tval);
100: }
101: if (!(t = strtok(p, " \t")))
102: goto bad;
103: for (mp = months;; ++mp) {
104: if (!*mp)
105: goto bad;
106: if (!strncasecmp(*mp, t, 3)) {
107: month = mp - months + 1;
108: break;
109: }
110: }
111: if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
112: goto bad;
113: day = atoi(t);
114: if (!(t = strtok((char *)NULL, " \t,")) || !isdigit(*t))
115: goto bad;
116: year = atoi(t);
117: if (day < 1 || day > 31 || month < 1 || month > 12 || !year)
118: goto bad;
119: if (year < 100)
120: year += TM_YEAR_BASE;
121: if (year <= EPOCH_YEAR)
122: bad: return (1);
123: tval = isleap(year) && month > 2;
124: for (--year; year >= EPOCH_YEAR; --year)
125: tval += isleap(year) ?
126: DAYSPERLYEAR : DAYSPERNYEAR;
127: while (--month)
128: tval += dmsize[month];
129: tval += day;
130: tval = tval * HOURSPERDAY * MINSPERHOUR * SECSPERMIN;
131: tval -= lt->tm_gmtoff;
132: *store = tval;
133: return (0);
134: }
135:
136: char *
137: ok_shell(name)
138: char *name;
139: {
140: char *p, *sh;
141:
142: setusershell();
143: while (sh = getusershell()) {
144: if (!strcmp(name, sh))
145: return (name);
146: /* allow just shell name, but use "real" path */
147: if ((p = strrchr(sh, '/')) && strcmp(name, p + 1) == 0)
148: return (sh);
149: }
150: return (NULL);
151: }
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