Port to AIX 4.2: limit the number of open file descriptors in a more

portable way.

ChangeLog

+2002-10-27  Per Cederqvist  <ceder@ceder.dyndns.org>
+
+	Port to AIX 4.2: limit the number of open file descriptors in a
+	more portable way.
+	* src/include/kom-config.h (PROTECTED_FDS): Added parenthesis
+	around the number.
+	(MAX_NO_OF_CONNECTIONS): Removed.
+	(USING_RLIMIT_NOFILE): Define if we have a good setrlimit.
+	(fd_ceiling): New variable.
+	* src/server/server-config.c (MAX_NO_OF_CONNECTIONS): Removed.
+	(fd_ceiling): New variable.
+	* src/server/connections.c (toploop): Transform ISC_EVENT_LOGIN to
+	ISC_EVENT_LOGIN_UNRELOCATED if the file descriptor is above
+	fd_ceiling.  This can only happen if USING_RLIMIT_NOFILE is
+	undefined, so ifdef out this code.
+	* src/server/ramkomd.c (go_daemon): Close everything below
+	fd_ceiling instead of using MAX_NO_OF_CONNECTIONS + PROTECTED_FDS.
+	(initialize): Use getrlimit/setrlimit if USING_RLIMIT_NOFILE is
+	defined.  Check that getrlimit after setrlimit returns a sane
+	value.  Don't use sysconf(_SC_OPEN_MAX), since getrlimit provides
+	a better value.  Set fd_ceiling instead of MAX_NO_OF_CONNECTIONS.
+	Make it possible to lower the ceiling even when we don't have a
+	working setrlimit.  Removed the final sanity checks; the world
+	ain't sane.
+	* src/server/testsuite/testfd.c (main): Adjusted logic for error
+	checks to be similar to the code now used.  In particular, don't
+	test sysconf(_SC_OPEN_MAX), and don't test getrlimit if
+	HAVE_BROKEN_NOFILE.
+
 2002-10-26  Per Cederqvist  <ceder@lysator.liu.se>
 
 	Prepare for more portable handling of the number of file