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