Adding upstream version 3.4.23.upstream/3.4.23upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 45 insertions, 0 deletions

diff --git a/README_FILES/ULTRIX_README b/README_FILES/ULTRIX_README
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+PPoossttffiixx aanndd UUllttrriixx
+
+-------------------------------------------------------------------------------
+
+PPoossttffiixx oonn UUllttrriixx
+
+This document is probably only of historical value, because Ultrix version 4
+dates from the early 1990s. However, as long as Wietse keeps Postfix alive for
+SunOS 4, it is likely to run on Ultrix 4 with very little change. Feedback is
+welcome if anyone actually still uses Postfix on any version of Ultrix.
+
+The source of this document is an email message by Christian von Roques that
+was sent on Jun 2, 1999.
+
+    I've upgraded the MTA of our DECstation-3100 running Ultrix4.3a to postfix-
+    19990317-pl05 and am sending you the patches I needed to get it running
+    under Ultrix.
+
+    . . .
+
+    One of the bugs of Ultrix's /bin/sh is that shell-variables set in
+    arguments of `:' expand to garbage if expanded in here-documents. Using a
+    different shell helps. I needed to replace all calls of ``sh .../makedefs''
+    by ``$(SHELL) .../makedefs'' in all the Makefile.in and am now able to use
+    ``make SHELL=/bin/sh5'' or zsh.
+
+    . . .
+
+    Ultrix's FD_SET_SIZE is 4096, but getdtablesize() returns 64 by default, if
+    not increased when building a new kernel. getrlimit() doesn't know
+    RLIMIT_NOFILE. This makes event_init() always log the warning: `could
+    allocate space for only 64 open files'.
+
+    I just reduced the threshold from 256 to 64, but this is not good. The
+    initial problem still remains: How to disable this warning on Ultrix
+    without making the source ugly?
+
+To work around the first problem, all the Makefile.in files have been updated
+to use `$(SHELL)' instead of `sh'. So you only need to supply a non-default
+shell in order to eliminate Ultrix shell trouble.
+
+To work around the latter, util/sys_defs.h was updated for Ultrix, with a
+default FD_SETSIZE of 100. This should be sufficient for a workstation. Even in
+1999, no-one would run a major mail hub on Ultrix 4.
+