- yp_dblookup.c: Create non-DB specific database access functions.
Using these allows access to the underlying database functions without
needing explicit knowledge of Berkeley DB. (These are used only
when DB_CACHE is #defined. Other programs that use the non-caching
functions (yp_mkdb, ypxfr, yppush, rpc.yppasswdd) shouldn't notice
the difference.)
- yp_dnslookup: Implement async DNS lookups. We send our own DNS
requests using UDP and put the request in a queue. When the response
arrives, we use the ID in the header to find the corresponsing queue
entry and then send the response to the client. We can go about our
business and handle other YP requests in the meantime. This way, we
can deal with time consuming DNS requests without blocking and without
forking.
- yp_server.c: Convert to using new non-DB-specific database access
functions. This simplifies the code a bit and removes the need for
this module to know anything about Berkeley DB. Also convert the
ypproc_match_2_svc() function to use the async DNS lookup routines.
- yp_main.c: tweak yp_svc_run() to add the resolver socket to the
set of descriptors monitored in the select() loop. Also add a
timeout to select(); we may get stale DNS requests stuck in the
queue which we want to invalidate after a while. If the timeout
hits, we decrement the ttl on all pending DNS requests and nuke
those requests that aren't handled before ttl hits zero.
- yp_extern.h: Add prototypes for new stuff.
- yp_svc_udp.c (new file): The async resolver code needs to be able
to rummage around inside the RPC UDP transport handle in order to
work correcty. There's basically one transport handle, and each time
a request comes in, the transaction ID in the handle is changed.
This means that if we queue a DNS request, then we handle some other
unrelated requests, we will be unable to send the DNS response because
the transaction ID and remote address of the client that made the DNS
request will have been lost. What we need to do is save the client
address and transaction ID in the queue entry for the DNS request,
then put the transaction ID and address back in the transport handle
when we're ready to reply. (And then we have to undo the change so
as not to confuse any other part of the server.) The trouble is that
the transaction ID is hidden in an opaque part of the transport handle,
and only the code in the svc_udp module in the RPC library knows how
to handle it. This file contains a couple of functions that let us
read and set the transaction ID in spite of this. This is really a
dirty trick and I should be taken out and shot for even thinking about
it, but there's no other way to get this stuff to work.
- Makefile: add yp_svc_udp.c to SRCS.
connecting to a host immediately in the foreground.
I would like to be able to run ppp from a script so that my script can be
sure that it is connected to the 'net before it continues running:
# Dial up the internet.
ppp -background myprovider || exit 1
do-some-net-command
# Hang up the modem.
kill -HUP `cat /var/run/ppp.tun0.pid`
Another problem is that the current ppp calls its process id file
`/var/run/PPP.server', which may conflict if you have more than one IP
tunnel interface available.
Closes PR#1469
Submitted by: Gord Matzigkeit <gord@enci.ucalgary.ca>
new 'aliased' packets. Note, if the original packet has a bogus cksum,
we will *NOT* re-compute the cksum, therefore the new packet will also
be wrong (but passed on).
Found by: MartinRenters@awfulhak.demon.co.uk
Reviewed by: Brian Somers <brian@awfulhak.demon.co.uk>
Submitted by: Charles Mott <cmott@srv.net>
will handle lines of any length in /etc/group.
2) Fixed bug with usermod -d not updating user's home
directory.
3) Minor formatting display changes/fixes with *show -P.
(/dev/urandom used by default under FreeBSD), and implemented a
"portable" but less secure generator for other systems.
Add display of expiry/password change dates in -P user display.
used by OpenBSD. (Quite frankly, I think it's perfectly reasonable to
use snprintf to copy strings, given that the semantics for strncpy()
are utterly idiotic and there is no POSIX sstrncpy().)
While I'm at it, incorporate some of OpenBSD's bugfixes to cron.
NOT for 2.2
version of strdup() by a macro, killed many calls to strdup(), thus
potentially wasting less malloc'ed space (their args were never be
free()ed desptie despite of being malloc'ed). Probably still a huge
memory leak at all... Also killed two totally useless variables.
I've tested it as i could, but wouldn't be surprised if unexpected
problems showed up. So watch out this space!
conservative part of the tidyup, like fixing potential buffer overflow
conditions. It is believed to be safe to go into 2.2.
Pointed out by: lozenko@cc.acnit.ac.ru (Evgeny A. Lozenko)
I went over the code.
Add shortcuts for addUser and addGroup, documenting same.
Add a password field for adduser and use no-echo string field for it.
This requires my latest libdialog changes (in RELENG_2_2 or -current) to work.
the profiling level in config and decide what to do in makefiles.
Makefile.i386:
Align functions to 16-byte boundaries if profiling is enabled. This
will allow a fourfold reduction in the size of the profiling buffers.
(otherwise ppp's behavior remains unchanged) and documented by myself,
Steve Sims, Nate Williams, Martin Renters and god-only-knows who else. :-)
Submitted by: nate
Obtained from: Charles Mott <cmott@srv.net>
