1 /*- 2 * Copyright (c) 1996 by 3 * David Nugent <davidn@blaze.net.au> 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 * $FreeBSD: head/lib/libutil/login_times.c 252376 2013-06-29 15:52:48Z kientzle $ 24 */ 25 26 #include <sys/types.h> 27 #include <ctype.h> 28 #include <login_cap.h> 29 #include <stdlib.h> 30 #include <string.h> 31 #include <time.h> 32 33 static struct 34 { 35 const char *dw; 36 u_char cn; 37 u_char fl; 38 } dws[] = 39 { 40 { "su", 2, LTM_SUN }, { "mo", 2, LTM_MON }, { "tu", 2, LTM_TUE }, 41 { "we", 2, LTM_WED }, { "th", 2, LTM_THU }, { "fr", 2, LTM_FRI }, 42 { "sa", 2, LTM_SAT }, { "any",3, LTM_ANY }, { "all",3, LTM_ANY }, 43 { "wk", 2, LTM_WK }, { "wd", 2, LTM_WD }, { NULL, 0, 0 } 44 }; 45 46 static char * 47 parse_time(char * ptr, u_short * t) 48 { 49 u_short val; 50 51 for (val = 0; *ptr && isdigit(*ptr); ptr++) 52 val = (u_short)(val * 10 + (*ptr - '0')); 53 54 *t = (u_short)((val / 100) * 60 + (val % 100)); 55 56 return (ptr); 57 } 58 59 60 login_time_t 61 parse_lt(const char *str) 62 { 63 login_time_t t; 64 65 memset(&t, 0, sizeof t); 66 t.lt_dow = LTM_NONE; 67 if (str && *str && strcmp(str, "Never") != 0 && strcmp(str, "None") != 0) { 68 int i; 69 login_time_t m = t; 70 char *p; 71 char buf[64]; 72 73 /* Make local copy and force lowercase to simplify parsing */ 74 strlcpy(buf, str, sizeof buf); 75 for (i = 0; buf[i]; i++) 76 buf[i] = (char)tolower(buf[i]); 77 p = buf; 78 79 while (isalpha(*p)) { 80 81 i = 0; 82 while (dws[i].dw && strncmp(p, dws[i].dw, dws[i].cn) != 0) 83 i++; 84 if (dws[i].dw == NULL) 85 break; 86 m.lt_dow |= dws[i].fl; 87 p += dws[i].cn; 88 } 89 90 if (m.lt_dow == LTM_NONE) /* No (valid) prefix, assume any */ 91 m.lt_dow |= LTM_ANY; 92 93 if (isdigit(*p)) 94 p = parse_time(p, &m.lt_start); 95 else 96 m.lt_start = 0; 97 if (*p == '-') 98 p = parse_time(p + 1, &m.lt_end); 99 else 100 m.lt_end = 1440; 101 102 t = m; 103 } 104 return (t); 105 } 106 107 108 int 109 in_ltm(const login_time_t *ltm, struct tm *tt, time_t *ends) 110 { 111 int rc = 0; 112 113 if (tt != NULL) { 114 /* First, examine the day of the week */ 115 if ((u_char)(0x01 << tt->tm_wday) & ltm->lt_dow) { 116 /* Convert `current' time to minute of the day */ 117 u_short now = (u_short)((tt->tm_hour * 60) + tt->tm_min); 118 119 if (tt->tm_sec > 30) 120 ++now; 121 if (now >= ltm->lt_start && now < ltm->lt_end) { 122 rc = 2; 123 if (ends != NULL) { 124 /* If requested, return ending time for this period */ 125 tt->tm_hour = (int)(ltm->lt_end / 60); 126 tt->tm_min = (int)(ltm->lt_end % 60); 127 *ends = mktime(tt); 128 } 129 } 130 } 131 } 132 return (rc); 133 } 134 135 136 int 137 in_lt(const login_time_t *ltm, time_t *t) 138 { 139 140 return (in_ltm(ltm, localtime(t), t)); 141 } 142 143 int 144 in_ltms(const login_time_t *ltm, struct tm *tm, time_t *t) 145 { 146 int i = 0; 147 148 while (i < LC_MAXTIMES && ltm[i].lt_dow != LTM_NONE) { 149 if (in_ltm(ltm + i, tm, t)) 150 return (i); 151 i++; 152 } 153 return (-1); 154 } 155 156 int 157 in_lts(const login_time_t *ltm, time_t *t) 158 { 159 160 return (in_ltms(ltm, localtime(t), t)); 161 } 162