summaryrefslogtreecommitdiffstats
path: root/lib/libutil/login_times.c
blob: 84ca397d463ed007dffcf764d0d11a58b0bb8672 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
/*-
 * Copyright (c) 1996 by
 * David Nugent <davidn@blaze.net.au>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, is permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice immediately at the beginning of the file, without modification,
 *    this list of conditions, and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. This work was done expressly for inclusion into FreeBSD.  Other use
 *    is permitted provided this notation is included.
 * 4. Absolutely no warranty of function or purpose is made by the authors.
 * 5. Modifications may be freely made to this file providing the above
 *    conditions are met.
 *
 * Login period parsing and comparison functions.
 *
 *	$Id: login_times.c,v 1.5 1997/05/10 18:55:38 davidn Exp $
 */

#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <ctype.h>

#include <sys/types.h>
#include <login_cap.h>

static struct
{
    const char	*dw;
    u_char      cn;
    u_char      fl;
} dws[] =
{
    { "su", 2, LTM_SUN }, { "mo", 2, LTM_MON }, { "tu", 2, LTM_TUE },
    { "we", 2, LTM_WED }, { "th", 2, LTM_THU }, { "fr", 2, LTM_FRI },
    { "sa", 2, LTM_SAT }, { "any",3, LTM_ANY }, { "all",3, LTM_ANY }, 
    { "wk", 2, LTM_WK  }, { "wd", 2, LTM_WD  }, { NULL, 0, 0       }
};

static char *
parse_time(char * ptr, u_short * t)
{
    u_short	val;

    for (val = 0; *ptr && isdigit(*ptr); ptr++)
	val = (u_short)(val * 10 + (*ptr - '0'));

    *t = (u_short)((val / 100) * 60 + (val % 100));

    return ptr;
}


login_time_t
parse_lt(const char * str)
{
    login_time_t    t;

    memset(&t, 0, sizeof t);
    t.lt_dow = LTM_NONE;
    if (str && *str && strcmp(str, "Never") != 0 && strcmp(str, "None") != 0) {
	int		i;
	login_time_t	m = t;
	char		*p;
	char		buf[64];

	/* Make local copy and force lowercase to simplify parsing */
	p = strncpy(buf, str, sizeof buf);
	buf[sizeof buf - 1] = '\0';
	for (i = 0; buf[i]; i++)
	    buf[i] = (char)tolower(buf[i]);

	while (isalpha(*p)) {

	    i = 0;
	    while (dws[i].dw && strncmp(p, dws[i].dw, dws[i].cn) != 0)
		i++;
	    if (dws[i].dw == NULL)
		break;
	    m.lt_dow |= dws[i].fl;
	    p += dws[i].cn;
	}

	if (m.lt_dow == LTM_NONE) /* No (valid) prefix, assume any */
	    m.lt_dow |= LTM_ANY;

	if (isdigit(*p))
	    p = parse_time(p, &m.lt_start);
	else
	    m.lt_start = 0;
	if (*p == '-')
	    p = parse_time(++p, &m.lt_end);
	else
	    m.lt_end = 1440;

	t = m;
    }
    return t;
}


int
in_ltm(const login_time_t * ltm, struct tm * tt, time_t * ends)
{
    int	    rc = 0;

    if (tt != NULL) {
	/* First, examine the day of the week */
	if ((u_char)(0x01 << tt->tm_wday) & ltm->lt_dow) {
	    /* Convert `current' time to minute of the day */
	    u_short	now = (u_short)((tt->tm_hour * 60) + tt->tm_min);

	    if (tt->tm_sec > 30)
		++now;
	    if (now >= ltm->lt_start && now < ltm->lt_end) {
		rc = 2;
		if (ends != NULL) {
		    /* If requested, return ending time for this period */
		    tt->tm_hour = (int)(ltm->lt_end / 60);
		    tt->tm_min  = (int)(ltm->lt_end % 60);
		    *ends = mktime(tt);
		}
	    }
	}
    }
    return rc;
}


int
in_lt(const login_time_t * ltm, time_t * t)
{
    return in_ltm(ltm, localtime(t), t);
}

int
in_ltms(const login_time_t * ltm, struct tm * tm, time_t * t)
{
    int	    i = 0;

    while (i < LC_MAXTIMES && ltm[i].lt_dow != LTM_NONE) {
	if (in_ltm(ltm + i, tm, t))
	    return i;
	i++;
    }
    return -1;
}

int
in_lts(const login_time_t * ltm, time_t * t)
{
    return in_ltms(ltm, localtime(t), t);
}

OpenPOWER on IntegriCloud