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    Length: 4749 (0x128d)
    Types: TextFile
    Names: »mailtime.c«

└─⟦a0efdde77⟧ Bits:30001252 EUUGD11 Tape, 1987 Spring Conference Helsinki
    └─⟦this⟧ »EUUGD11/euug-87hel/sec1/elm/src/mailtime.c« 

TextFile

/**			mailtime.c			**/

/** This set of routines is used to figure out when the user last read
    their mail and to also figure out if a given message is new or not.

    (C) Copyright 1986 Dave Taylor
**/

#include "headers.h"

#include <sys/types.h>
#include <sys/stat.h>
#ifdef BSD
#  ifndef BSD4.1
#    include <sys/time.h>
#  else
#    include <time.h>
#    include <sys/timeb.h>
#  endif
#else
#  include <time.h>
#endif

resolve_received(entry)
struct header_rec *entry;
{
	/** Entry has the data for computing the time and date the 
	    message was received.  Fix it and return **/

	switch (tolower(entry->month[0])) {
	  case 'j' : if (tolower(entry->month[1]) == 'a')
		       entry->received.month = JANUARY;
		     else if (tolower(entry->month[2]) == 'n')
	               entry->received.month = JUNE;
		     else
	               entry->received.month = JULY;
	             break;
	  case 'f' : entry->received.month = FEBRUARY;
	 	     break;
	  case 'm' : if (tolower(entry->month[2]) == 'r')
	               entry->received.month = MARCH;
		     else
		       entry->received.month = MAY;
	             break;
	  case 'a' : if (tolower(entry->month[1]) == 'p')
	               entry->received.month = APRIL;
	             else
	               entry->received.month = AUGUST;
		     break;
	  case 's' : entry->received.month = SEPTEMBER;
		     break;
	  case 'o' : entry->received.month = OCTOBER;
		     break;
	  case 'n' : entry->received.month = NOVEMBER;
	  	     break;
	  case 'd' : entry->received.month = DECEMBER;
		     break;
	}

	sscanf(entry->day, "%d", &(entry->received.day));

	sscanf(entry->year, "%d", &(entry->received.year));
	if (entry->received.year > 100) entry->received.year -= 1900;

	sscanf(entry->time, "%d:%d", &(entry->received.hour),
	       &(entry->received.minute));
}

get_mailtime()
{
	/** Instantiate the values of the last_read_mail stat
	    variable based on the file access time/date of the
	    file mailtime_file.  IF the file doesn't exist,
	    then assume all mail is new. **/

	struct stat buffer;
	struct tm   *timebuf;
	char   filename[SLEN];
#ifdef BSD
	extern struct tm *localtime();
#endif

	sprintf(filename, "%s/%s", home, mailtime_file);

	if (stat(filename, &buffer) == -1) {
	  last_read_mail.month = 0;
	  last_read_mail.day = 0;
	  last_read_mail.year = 0;
	  last_read_mail.hour = 0;
	  last_read_mail.minute = 0;
	}
	else {	/* stat okay... */
	  timebuf = (struct tm *) localtime(&(buffer.st_mtime));
	  
	  last_read_mail.month = timebuf->tm_mon;
	  last_read_mail.day = timebuf->tm_mday;
	  last_read_mail.year = timebuf->tm_year;
	  last_read_mail.hour = timebuf->tm_hour;
	  last_read_mail.minute = timebuf->tm_min;
	}
}

update_mailtime()
{
	/** This routine updates the last modified time of the 
	    .last_read_mail file in the users home directory.
	    If the file doesn't exist, it creates it!! **/

	char filename[SLEN];

#ifdef BSD
# ifdef BSD4.1
	struct timeb  loc_time;
	time_t tval;
# else
	struct timeval	tval[2];
	struct timezone tzone;
# endif
#endif
	
	sprintf(filename, "%s/%s", home, mailtime_file);

#ifdef BSD
# ifdef BSD4.1
	tval = (time_t) time((long *) 0);
	if (utime(filename, &tval) == -1)
# else
	gettimeofday(&tval[0], &tzone);
	gettimeofday(&tval[1], &tzone);

	if (utimes(filename, tval) == -1)	/* note the "S" */
# endif
#else
	if (utime(filename, NULL) == -1)	/* note no "S"  */
#endif
	/** That's what I like about programming for BSD & USG - the easy
	    portability between 'em.  Especially the section 2 calls!! **/

	  (void) creat(filename, 0777);
}

new_msg(entry)
struct header_rec entry;
{
	/** Return true if the current message is NEW.  This can be
	    easily tested by seeing 1) if we're reading the incoming
	    mailbox and then, if so, 2) if the received_on_machine
	    date is more recent than the last_read_mail date.
	**/

	if (mbox_specified != 0) return(FALSE);		/* not incoming */
	
	/** Two tests - if received is OLDER than last read mail, then
	    immediately return FALSE.  If received is NEWER than last
	    read mail then immediately return TRUE **/

	if (entry.received.year < last_read_mail.year) 
	  return(FALSE);				
	
	if (entry.received.year > last_read_mail.year) 
	  return(TRUE);				
	
	if (entry.received.month < last_read_mail.month)
	  return(FALSE);			

	if (entry.received.month > last_read_mail.month)
	  return(TRUE);			

	if (entry.received.day < last_read_mail.day)
	  return(FALSE);

	if (entry.received.day > last_read_mail.day)
	  return(TRUE);

	if (entry.received.hour < last_read_mail.hour)		
	  return(FALSE);		
	
	if (entry.received.hour > last_read_mail.hour)		
	  return(TRUE);		
	
	if (entry.received.minute < last_read_mail.minute)
	  return(FALSE);	

	return(TRUE);
}