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static char rcsid[] = "@(#)$Id: expires.c,v 5.2 1992/12/07 02:58:56 syd Exp $";
/*******************************************************************************
* The Elm Mail System - $Revision: 5.2 $ $State: Exp $
*
* Copyright (c) 1988-1992 USENET Community Trust
* Copyright (c) 1986,1987 Dave Taylor
*******************************************************************************
* Bug reports, patches, comments, suggestions should be sent to:
*
* Syd Weinstein, Elm Coordinator
* elm@DSI.COM dsinc!elm
*
*******************************************************************************
* $Log: expires.c,v $
* Revision 5.2 1992/12/07 02:58:56 syd
* Fix long -> time_t
* From: Syd
*
* Revision 5.1 1992/10/03 22:58:40 syd
* Initial checkin as of 2.4 Release at PL0
*
*
******************************************************************************/
/** This routine is written to deal with the Expires: header on the
individual mail coming in. What it does is to look at the date,
compare it to todays date, then set the EXPIRED flag on the
current message if it is true...
**/
#include "headers.h"
#ifdef I_TIME
# include <time.h>
#endif
#ifdef I_SYSTIME
# include <sys/time.h>
#endif
#include <ctype.h>
#ifdef BSD
#undef toupper
#undef tolower
#endif
process_expiration_date(date, message_status)
char *date;
int *message_status;
{
struct tm *timestruct;
time_t thetime;
char word1[WLEN], word2[WLEN], word3[WLEN], word4[WLEN], word5[WLEN];
int month = 0, day = 0, year = 0, hour = 0, minute = 0;
#ifndef _POSIX_SOURCE
struct tm *localtime();
time_t time();
#endif
/** first step is to break down the date given into MM DD YY HH MM
format: The possible formats for this field are, by example:
(1) Mon, Jun 11, 87
(2) Mon, 11 Jun 87
(3) Jun 11, 87
(4) 11 Jun 87
(5) 11/06/87 <- ambiguous - will be ignored!!
(6) 8711061248GMT
(7) Mon, Jun 11, 87 12:48:35 GMT
The reason #5 is considered ambiguous will be made clear
if we consider a message to be expired on Jan 4, 88:
01/04/88 in the United States
04/01/88 in Europe
so is the first field the month or the day? Standard prob.
**/
sscanf(date, "%s %s %s %s %s",
word1, word2, word3, word4, word5);
if (strlen(word5) != 0) { /* we have form #7 */
day = atoi(word1);
month = month_number(word2);
year = atoi(word3);
sscanf(word4, "%02d%*c%02d",
&hour, &minute);
}
else if (strlen(word2) == 0) { /* we have form #6 or form #5 */
if (isdigit(word1[1]) && isdigit(word1[2])) /* form #6 */
sscanf(word1, "%02d%02d%02d%02d%02d%*c",
&year, &month, &day, &hour, &minute);
}
else if (strlen(word4) != 0) { /* form #1 or form #2 */
if(isdigit(word2[0])) { /* form #2 */
month = month_number(word3);
day = atoi(word2);
year = atoi(word4);
} else { /* form #1 */
month = month_number(word2);
day = atoi(word3);
year = atoi(word4);
}
}
else if (! isdigit(word1[0])) { /* form #3 */
month = month_number(word1);
day = atoi(word2);
year = atoi(word3);
}
else { /* form #4 */
day = atoi(word1);
month = month_number(word2);
year = atoi(word3);
}
if (day == 0 || year == 0)
return; /* we didn't get a valid date */
/** next let's get the current time and date, please **/
thetime = time((time_t *) 0);
timestruct = localtime(&thetime);
/** and compare 'em **/
if (year > timestruct->tm_year)
return;
else if (year < timestruct->tm_year)
goto expire_message;
if (month > timestruct->tm_mon)
return;
else if (month < timestruct->tm_mon)
goto expire_message;
if (day > timestruct->tm_mday)
return;
else if (day < timestruct->tm_mday)
goto expire_message;
if (hour > timestruct->tm_hour)
return;
else if (hour < timestruct->tm_hour)
goto expire_message;
if (minute > timestruct->tm_min)
return;
expire_message:
/** it's EXPIRED! Yow!! **/
(*message_status) |= EXPIRED;
}
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