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 1.2 2003/06/17 04:26:52 dillon Exp $ 25 */ 26 27 #include <stdlib.h> 28 #include <string.h> 29 #include <time.h> 30 #include <ctype.h> 31 32 #include <sys/types.h> 33 #include <login_cap.h> 34 35 static struct 36 { 37 const char *dw; 38 u_char cn; 39 u_char fl; 40 } dws[] = 41 { 42 { "su", 2, LTM_SUN }, { "mo", 2, LTM_MON }, { "tu", 2, LTM_TUE }, 43 { "we", 2, LTM_WED }, { "th", 2, LTM_THU }, { "fr", 2, LTM_FRI }, 44 { "sa", 2, LTM_SAT }, { "any",3, LTM_ANY }, { "all",3, LTM_ANY }, 45 { "wk", 2, LTM_WK }, { "wd", 2, LTM_WD }, { NULL, 0, 0 } 46 }; 47 48 static char * 49 parse_time(char * ptr, u_short * t) 50 { 51 u_short val; 52 53 for (val = 0; *ptr && isdigit(*ptr); ptr++) 54 val = (u_short)(val * 10 + (*ptr - '0')); 55 56 *t = (u_short)((val / 100) * 60 + (val % 100)); 57 58 return ptr; 59 } 60 61 62 login_time_t 63 parse_lt(const char * str) 64 { 65 login_time_t t; 66 67 memset(&t, 0, sizeof t); 68 t.lt_dow = LTM_NONE; 69 if (str && *str && strcmp(str, "Never") != 0 && strcmp(str, "None") != 0) { 70 int i; 71 login_time_t m = t; 72 char *p; 73 char buf[64]; 74 75 /* Make local copy and force lowercase to simplify parsing */ 76 p = strncpy(buf, str, sizeof buf); 77 buf[sizeof buf - 1] = '\0'; 78 for (i = 0; buf[i]; i++) 79 buf[i] = (char)tolower(buf[i]); 80 81 while (isalpha(*p)) { 82 83 i = 0; 84 while (dws[i].dw && strncmp(p, dws[i].dw, dws[i].cn) != 0) 85 i++; 86 if (dws[i].dw == NULL) 87 break; 88 m.lt_dow |= dws[i].fl; 89 p += dws[i].cn; 90 } 91 92 if (m.lt_dow == LTM_NONE) /* No (valid) prefix, assume any */ 93 m.lt_dow |= LTM_ANY; 94 95 if (isdigit(*p)) 96 p = parse_time(p, &m.lt_start); 97 else 98 m.lt_start = 0; 99 if (*p == '-') 100 p = parse_time(++p, &m.lt_end); 101 else 102 m.lt_end = 1440; 103 104 t = m; 105 } 106 return t; 107 } 108 109 110 int 111 in_ltm(const login_time_t * ltm, struct tm * tt, time_t * ends) 112 { 113 int rc = 0; 114 115 if (tt != NULL) { 116 /* First, examine the day of the week */ 117 if ((u_char)(0x01 << tt->tm_wday) & ltm->lt_dow) { 118 /* Convert `current' time to minute of the day */ 119 u_short now = (u_short)((tt->tm_hour * 60) + tt->tm_min); 120 121 if (tt->tm_sec > 30) 122 ++now; 123 if (now >= ltm->lt_start && now < ltm->lt_end) { 124 rc = 2; 125 if (ends != NULL) { 126 /* If requested, return ending time for this period */ 127 tt->tm_hour = (int)(ltm->lt_end / 60); 128 tt->tm_min = (int)(ltm->lt_end % 60); 129 *ends = mktime(tt); 130 } 131 } 132 } 133 } 134 return rc; 135 } 136 137 138 int 139 in_lt(const login_time_t * ltm, time_t * t) 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 return in_ltms(ltm, localtime(t), t); 161 } 162 163