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 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 * 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 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 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 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 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 158 in_lts(const login_time_t *ltm, time_t *t) 159 { 160 161 return (in_ltms(ltm, localtime(t), t)); 162 } 163