1 /*-
2 * Copyright (c) 1996 by
3 * David Nugent <[email protected]>
4 * All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, is permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice immediately at the beginning of the file, without modification,
11 * 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. This work was done expressly for inclusion into FreeBSD. Other use
16 * is permitted provided this notation is included.
17 * 4. Absolutely no warranty of function or purpose is made by the authors.
18 * 5. Modifications may be freely made to this file providing the above
19 * conditions are met.
20 *
21 * Login period parsing and comparison functions.
22 */
23
24 #include <sys/cdefs.h>
25 __FBSDID("$FreeBSD$");
26
27 #include <sys/types.h>
28 #include <ctype.h>
29 #include <login_cap.h>
30 #include <stdlib.h>
31 #include <string.h>
32 #include <time.h>
33
34 static struct
35 {
36 const char *dw;
37 u_char cn;
38 u_char fl;
39 } dws[] =
40 {
41 { "su", 2, LTM_SUN }, { "mo", 2, LTM_MON }, { "tu", 2, LTM_TUE },
42 { "we", 2, LTM_WED }, { "th", 2, LTM_THU }, { "fr", 2, LTM_FRI },
43 { "sa", 2, LTM_SAT }, { "any",3, LTM_ANY }, { "all",3, LTM_ANY },
44 { "wk", 2, LTM_WK }, { "wd", 2, LTM_WD }, { NULL, 0, 0 }
45 };
46
47 static char *
parse_time(char * ptr,u_short * t)48 parse_time(char * ptr, u_short * t)
49 {
50 u_short val;
51
52 for (val = 0; *ptr && isdigit(*ptr); ptr++)
53 val = (u_short)(val * 10 + (*ptr - '0'));
54
55 *t = (u_short)((val / 100) * 60 + (val % 100));
56
57 return (ptr);
58 }
59
60
61 login_time_t
parse_lt(const char * str)62 parse_lt(const char *str)
63 {
64 login_time_t t;
65
66 memset(&t, 0, sizeof t);
67 t.lt_dow = LTM_NONE;
68 if (str && *str && strcmp(str, "Never") != 0 && strcmp(str, "None") != 0) {
69 int i;
70 login_time_t m = t;
71 char *p;
72 char buf[64];
73
74 /* Make local copy and force lowercase to simplify parsing */
75 strlcpy(buf, str, sizeof buf);
76 for (i = 0; buf[i]; i++)
77 buf[i] = (char)tolower(buf[i]);
78 p = buf;
79
80 while (isalpha(*p)) {
81
82 i = 0;
83 while (dws[i].dw && strncmp(p, dws[i].dw, dws[i].cn) != 0)
84 i++;
85 if (dws[i].dw == NULL)
86 break;
87 m.lt_dow |= dws[i].fl;
88 p += dws[i].cn;
89 }
90
91 if (m.lt_dow == LTM_NONE) /* No (valid) prefix, assume any */
92 m.lt_dow |= LTM_ANY;
93
94 if (isdigit(*p))
95 p = parse_time(p, &m.lt_start);
96 else
97 m.lt_start = 0;
98 if (*p == '-')
99 p = parse_time(p + 1, &m.lt_end);
100 else
101 m.lt_end = 1440;
102
103 t = m;
104 }
105 return (t);
106 }
107
108
109 int
in_ltm(const login_time_t * ltm,struct tm * tt,time_t * ends)110 in_ltm(const login_time_t *ltm, struct tm *tt, time_t *ends)
111 {
112 int rc = 0;
113
114 if (tt != NULL) {
115 /* First, examine the day of the week */
116 if ((u_char)(0x01 << tt->tm_wday) & ltm->lt_dow) {
117 /* Convert `current' time to minute of the day */
118 u_short now = (u_short)((tt->tm_hour * 60) + tt->tm_min);
119
120 if (tt->tm_sec > 30)
121 ++now;
122 if (now >= ltm->lt_start && now < ltm->lt_end) {
123 rc = 2;
124 if (ends != NULL) {
125 /* If requested, return ending time for this period */
126 tt->tm_hour = (int)(ltm->lt_end / 60);
127 tt->tm_min = (int)(ltm->lt_end % 60);
128 *ends = mktime(tt);
129 }
130 }
131 }
132 }
133 return (rc);
134 }
135
136
137 int
in_lt(const login_time_t * ltm,time_t * t)138 in_lt(const login_time_t *ltm, time_t *t)
139 {
140
141 return (in_ltm(ltm, localtime(t), t));
142 }
143
144 int
in_ltms(const login_time_t * ltm,struct tm * tm,time_t * t)145 in_ltms(const login_time_t *ltm, struct tm *tm, time_t *t)
146 {
147 int i = 0;
148
149 while (i < LC_MAXTIMES && ltm[i].lt_dow != LTM_NONE) {
150 if (in_ltm(ltm + i, tm, t))
151 return (i);
152 i++;
153 }
154 return (-1);
155 }
156
157 int
in_lts(const login_time_t * ltm,time_t * t)158 in_lts(const login_time_t *ltm, time_t *t)
159 {
160
161 return (in_ltms(ltm, localtime(t), t));
162 }
163