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: src/lib/libutil/login_times.c,v 1.7 1999/08/28 00:05:48 peter Exp $ 24 * $DragonFly: src/lib/libutil/login_times.c,v 1.3 2005/03/04 04:31:11 cpressey Exp $ 25 */ 26 27 #include <sys/types.h> 28 29 #include <ctype.h> 30 #include <stdlib.h> 31 #include <string.h> 32 #include <time.h> 33 34 #include "login_cap.h" 35 36 static struct 37 { 38 const char *dw; 39 u_char cn; 40 u_char fl; 41 } dws[] = 42 { 43 { "su", 2, LTM_SUN }, { "mo", 2, LTM_MON }, { "tu", 2, LTM_TUE }, 44 { "we", 2, LTM_WED }, { "th", 2, LTM_THU }, { "fr", 2, LTM_FRI }, 45 { "sa", 2, LTM_SAT }, { "any",3, LTM_ANY }, { "all",3, LTM_ANY }, 46 { "wk", 2, LTM_WK }, { "wd", 2, LTM_WD }, { NULL, 0, 0 } 47 }; 48 49 static char * 50 parse_time(char * ptr, u_short * t) 51 { 52 u_short val; 53 54 for (val = 0; *ptr && isdigit(*ptr); ptr++) 55 val = (u_short)(val * 10 + (*ptr - '0')); 56 57 *t = (u_short)((val / 100) * 60 + (val % 100)); 58 59 return ptr; 60 } 61 62 63 login_time_t 64 parse_lt(const char * str) 65 { 66 login_time_t t; 67 68 memset(&t, 0, sizeof t); 69 t.lt_dow = LTM_NONE; 70 if (str && *str && strcmp(str, "Never") != 0 && strcmp(str, "None") != 0) { 71 int i; 72 login_time_t m = t; 73 char *p; 74 char buf[64]; 75 76 /* Make local copy and force lowercase to simplify parsing */ 77 p = strncpy(buf, str, sizeof buf); 78 buf[sizeof buf - 1] = '\0'; 79 for (i = 0; buf[i]; i++) 80 buf[i] = (char)tolower(buf[i]); 81 82 while (isalpha(*p)) { 83 84 i = 0; 85 while (dws[i].dw && strncmp(p, dws[i].dw, dws[i].cn) != 0) 86 i++; 87 if (dws[i].dw == NULL) 88 break; 89 m.lt_dow |= dws[i].fl; 90 p += dws[i].cn; 91 } 92 93 if (m.lt_dow == LTM_NONE) /* No (valid) prefix, assume any */ 94 m.lt_dow |= LTM_ANY; 95 96 if (isdigit(*p)) 97 p = parse_time(p, &m.lt_start); 98 else 99 m.lt_start = 0; 100 if (*p == '-') 101 p = parse_time(++p, &m.lt_end); 102 else 103 m.lt_end = 1440; 104 105 t = m; 106 } 107 return t; 108 } 109 110 111 int 112 in_ltm(const login_time_t * ltm, struct tm * tt, time_t * ends) 113 { 114 int rc = 0; 115 116 if (tt != NULL) { 117 /* First, examine the day of the week */ 118 if ((u_char)(0x01 << tt->tm_wday) & ltm->lt_dow) { 119 /* Convert `current' time to minute of the day */ 120 u_short now = (u_short)((tt->tm_hour * 60) + tt->tm_min); 121 122 if (tt->tm_sec > 30) 123 ++now; 124 if (now >= ltm->lt_start && now < ltm->lt_end) { 125 rc = 2; 126 if (ends != NULL) { 127 /* If requested, return ending time for this period */ 128 tt->tm_hour = (int)(ltm->lt_end / 60); 129 tt->tm_min = (int)(ltm->lt_end % 60); 130 *ends = mktime(tt); 131 } 132 } 133 } 134 } 135 return rc; 136 } 137 138 139 int 140 in_lt(const login_time_t * ltm, time_t * t) 141 { 142 return in_ltm(ltm, localtime(t), t); 143 } 144 145 int 146 in_ltms(const login_time_t * ltm, struct tm * tm, time_t * t) 147 { 148 int i = 0; 149 150 while (i < LC_MAXTIMES && ltm[i].lt_dow != LTM_NONE) { 151 if (in_ltm(ltm + i, tm, t)) 152 return i; 153 i++; 154 } 155 return -1; 156 } 157 158 int 159 in_lts(const login_time_t * ltm, time_t * t) 160 { 161 return in_ltms(ltm, localtime(t), t); 162 } 163 164