162 lines
3.7 KiB
C
162 lines
3.7 KiB
C
/*-
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* Copyright (c) 1996 by
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* David Nugent <davidn@blaze.net.au>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, is permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice immediately at the beginning of the file, without modification,
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* this list of conditions, and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. This work was done expressly for inclusion into FreeBSD. Other use
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* is permitted provided this notation is included.
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* 4. Absolutely no warranty of function or purpose is made by the authors.
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* 5. Modifications may be freely made to this file providing the above
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* conditions are met.
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*
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* Login period parsing and comparison functions.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/types.h>
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#include <ctype.h>
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#include <login_cap.h>
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#include <stdlib.h>
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#include <string.h>
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#include <time.h>
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static struct
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{
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const char *dw;
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u_char cn;
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u_char fl;
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} dws[] =
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{
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{ "su", 2, LTM_SUN }, { "mo", 2, LTM_MON }, { "tu", 2, LTM_TUE },
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{ "we", 2, LTM_WED }, { "th", 2, LTM_THU }, { "fr", 2, LTM_FRI },
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{ "sa", 2, LTM_SAT }, { "any",3, LTM_ANY }, { "all",3, LTM_ANY },
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{ "wk", 2, LTM_WK }, { "wd", 2, LTM_WD }, { NULL, 0, 0 }
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};
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static char *
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parse_time(char * ptr, u_short * t)
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{
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u_short val;
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for (val = 0; *ptr && isdigit(*ptr); ptr++)
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val = (u_short)(val * 10 + (*ptr - '0'));
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*t = (u_short)((val / 100) * 60 + (val % 100));
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return ptr;
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}
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login_time_t
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parse_lt(const char * str)
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{
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login_time_t t;
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memset(&t, 0, sizeof t);
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t.lt_dow = LTM_NONE;
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if (str && *str && strcmp(str, "Never") != 0 && strcmp(str, "None") != 0) {
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int i;
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login_time_t m = t;
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char *p;
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char buf[64];
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/* Make local copy and force lowercase to simplify parsing */
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p = strncpy(buf, str, sizeof buf);
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buf[sizeof buf - 1] = '\0';
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for (i = 0; buf[i]; i++)
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buf[i] = (char)tolower(buf[i]);
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while (isalpha(*p)) {
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i = 0;
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while (dws[i].dw && strncmp(p, dws[i].dw, dws[i].cn) != 0)
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i++;
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if (dws[i].dw == NULL)
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break;
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m.lt_dow |= dws[i].fl;
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p += dws[i].cn;
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}
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if (m.lt_dow == LTM_NONE) /* No (valid) prefix, assume any */
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m.lt_dow |= LTM_ANY;
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if (isdigit(*p))
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p = parse_time(p, &m.lt_start);
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else
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m.lt_start = 0;
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if (*p == '-')
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p = parse_time(++p, &m.lt_end);
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else
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m.lt_end = 1440;
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t = m;
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}
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return t;
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}
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int
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in_ltm(const login_time_t * ltm, struct tm * tt, time_t * ends)
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{
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int rc = 0;
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if (tt != NULL) {
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/* First, examine the day of the week */
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if ((u_char)(0x01 << tt->tm_wday) & ltm->lt_dow) {
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/* Convert `current' time to minute of the day */
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u_short now = (u_short)((tt->tm_hour * 60) + tt->tm_min);
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if (tt->tm_sec > 30)
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++now;
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if (now >= ltm->lt_start && now < ltm->lt_end) {
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rc = 2;
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if (ends != NULL) {
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/* If requested, return ending time for this period */
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tt->tm_hour = (int)(ltm->lt_end / 60);
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tt->tm_min = (int)(ltm->lt_end % 60);
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*ends = mktime(tt);
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}
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}
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}
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}
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return rc;
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}
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int
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in_lt(const login_time_t * ltm, time_t * t)
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{
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return in_ltm(ltm, localtime(t), t);
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}
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int
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in_ltms(const login_time_t * ltm, struct tm * tm, time_t * t)
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{
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int i = 0;
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while (i < LC_MAXTIMES && ltm[i].lt_dow != LTM_NONE) {
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if (in_ltm(ltm + i, tm, t))
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return i;
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i++;
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}
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return -1;
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}
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int
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in_lts(const login_time_t * ltm, time_t * t)
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{
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return in_ltms(ltm, localtime(t), t);
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}
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