🚀 go-pugleaf

In article <1992Aug8.021202.6182@cs.ucla.edu>, wales@valeria.cs.ucla.edu (Rich Wales) writes:
> However, if Fred is using a ".forward" file, there is the possibility
> that mail delivery might not go as planned
> ...
> the sources, it should be possible to add a test to see whether Fred's
> home directory is currently accessible; if yes, delivery would proceed,
> but if not, delivery would be delayed until the next queue run.  This
> should presumably fix things . . . .

I am using exactly such a scheme, and it seems to serve the purpose
well enough in most practical cases.
An example of a simple possible fix is attached below (context diff
against 5.65c+IDA1.4.4, your mileage may vary).

> Well, not quite.  If Fred is invoking a program amongst his own files
> from inside his ".forward" -- and/or if Fred is using some scheme that
> pre-sorts his incoming mail among a group of "folders" or files in his
> home directory -- there could still be trouble if the fileserver F man-
> ages to go down immediately after the workstation W's sendmail checks
> for Fred's directory and finds it's there.

I think that it has now become the responsibility of Fred's mail filters,
and not of sendmail any more, to postpone delivery by returning an
EX_TEMPFAIL or such status, if they decide that for some reason they
cannot act as desired.


*** sendmail.h	Sat Aug  8 14:20:48 1992
--- sendmail.h.new	Sat Aug  8 14:22:22 1992
***************
*** 150,155 ****
--- 150,156 ----
  # define QPRIMARY	000010	/* set from argv */
  # define QQUEUEUP	000020	/* queue for later transmission */
  # define QSELFREF	000040	/* self-reference in alias/forward expansion */
+ # define QMUSTQUEUE	000100	/* force queueup instead of delivery */
  /*
  **  Mailer definition structure.
  **	Every mailer known to the system is declared in this


*** alias.c	Sat Aug  8 14:20:52 1992
--- alias.c.new	Sat Aug  8 14:26:28 1992
***************
*** 689,694 ****
--- 689,695 ----
  	ADDRESS **sendq;
  {
  	char buf[60];
+ 	struct stat stb;
  
  	if (tTd(27, 1))
  		printf("forward(%s)\n", user->q_paddr);
***************
*** 701,706 ****
--- 702,715 ----
  	/* good address -- look for .forward file in home */
  	define('z', user->q_home, CurEnv);
  	expand("\001z/.forward", buf, &buf[sizeof buf - 1], CurEnv);
+ 
+ 	/* force queueup if home directory unavailable */
+ 	if (stat(user->q_home, &stb) < 0)
+ 	{
+ 		user->q_flags |= QMUSTQUEUE;
+ 		return;
+ 	}
+ 
  	if (!safefile(buf, user->q_uid, S_IREAD))
  		return;
  

*** deliver.c	Sat Aug  8 14:20:58 1992
--- deliver.c.new	Sat Aug  8 14:24:55 1992
***************
*** 182,187 ****
--- 182,203 ----
  #endif /* BIT8 */
  
  	/*
+ 	**  We may have decided earlier that this recipient must be queued.
+ 	**  Used if the home directory of a local recipient is unavailable.
+ 	*/
+ 
+ 	if (bitset(QMUSTQUEUE, to->q_flags))
+ 	{
+ 		to->q_flags |= QQUEUEUP|QDONTSEND;
+ 		e->e_to = to->q_paddr;
+ 		message(Arpa_Info, "queued");
+ 		if (LogLevel > 4)
+ 			logdelivery("queued");
+ 		e->e_to = NULL;
+ 		return (0);
+ 	}
+ 
+ 	/*
  	**  If this mailer is expensive, and if we don't want to make
  	**  connections now, just mark these addresses and return.
  	**	This is useful if we want to batch connections to


Eric Wassenaar
-- 
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