assign_wrapper.in: Hack in a change that ensures a delay node is
created for any link on which an event is posted (up,down,modify),
no matter what its initial parameters are. ie: If a link is created
with no delay, but there is an event that adds a delay later, then we
must drop in a delay node. Same for up/down on a link. We do this in
the delay node. I am reasonably confident that this change is fine for
duplex links, but I am less sure of the effect on lans!

eventsys_control.in: Checkpoint latest changes. Add "replay" option,
which right now just stops and starts the event scheduler so that it
reloads the entire event list. Add check for existing experiment, and
that the experiment is either active or swapping (do not want to start
a scheduler for a swapped out experiment!). Add check to see if there
are any events, and skip startup if there are not events in the DB.
Lastly, get very serious about preventing more than one scheduler from
being started, either by accident or intentionally. My protocol is to
lock the table, grab and set the pid to -pid, test the pid for a
positive value, and if positive, send the scheduler a kill(TERM) so
that it can cleanup, clear the pid to zero in the DB, and exit. This
approach ensures that we do not try to send a kill to a pid that is no
longer active or owned by the user (this last part is not really
necessary cause of how pids are reused, but it was easy to add so why
not).

exports_setup.in: Trivial change to make it easier to turn this on
temporarily in devel trees.
named_setup.in: Ditto.

node_reboot.in: Add call to TBdbfork() in child cause of apparent DB
connection problems across forks. In the child, set the eventstatus
for the node to REBOOT if successful (not this event status stuff is
temporary, will be recast in next set of revisions).

GNUmakefile:  Add new controlling program, eventsys_control.
power.in:     Ditto previous comment about REBOOT.
os_setup.in:  Non event system cleanups.
tbend.in:     Add DB cleanup of the new virt_trafgens and eventlist tables.
tbprerun.in:  Ditto.
tbreport.in:  Print out the event list in a pretty print format.
tbswapin.in:  Add call to start the event system. Also a big fix; move
              the named script up above the os_setup so that the named
              tables have been updated by the time the first node
              reboots. I noticed that nodes were failing on gethostbyname().
tbswapout.in: Add call to stop the event system.

them into a private header file.

its meaning!

export that stuff.
Add signal handlers to ensure that INT/TERM/HUP signals are caught and
that we exit cleanly (clearing the pid from the DB).
Minor rework for DB table structure and the switch from per-experiment
event tables to a single event table indexed by pid,eid.

are gone!

recreating the connection to the DB across a fork. It appears that
with the connection shared, DB queries can fail. It would be nice if
PERL had fork handlers.

Add TBSetNodeEventState() and TBGetNodeEventState() library routines,
and some constants for the event tags.

Beef up the experiment access check code to handle destroy as a
distinct case.

tevd: Proper daemonization code, controlled by debug option.

delay-agent/{callback,main}.c: Minor -Wall fixes.

tbsend.c and tbrecv.c, which are trivial examples of how to send
and receive a sample event.

already a pid associated with the experiment (unless clearing it to
zero). This enforces the restriction that there should only be a
single event scheduler running for an experiment!

Daemon if it exists.

which agents are attached to which node, so that we can assign
portnumbers to them. Also add code to updating the DB with these
agents (virt_trafgens).

sim.tcl: Get rid of $pid_$eid_events (per experiment events table),
and replace with global eventlist table. Revisit this later, since it
was causing problems and we do not really have a problem right now.
Maybe later.

traffic.tcl: Add virt_trafgens DB table update code. Get rid of oskit
based traffic generators and replace with FreeBSD nodes, which will
boot up and check if they are traffic gen source. Add get_params call,
called by the event code im sim.tcl to get the current params for the
START event.

generator node.

matches the one in the checked-out source.

This now gets called as part of the 'boss-install' target, to guard
against installing software that is out-of-sync with the running
database. It is skipped if @prefix@ is not /usr/testbed, to avoid
getting in the way of development.

If you want to bypass this check, use the 'boss-install-force' target.
Use of this, however, is not recommended.

Also, now indicates differences, or lack thereof, with its exit value.
Returns 0 if there is no difference between the schemas, or 1 if there
is one.

rather than assuming a fixed size of 640x480.
Should provide more room in workarea for network designs.

events .

pedantic than either opera or IE, or more likely just stupid).

our web access checks are in php3, it's wrapped in a php3 wrapper
script. Access to it is controlled via the cvsweb column in the
users table.

cvsweb only gets installed on the main emulab site - that is, if
OURDOMAIN is defined to be emulab.net

cvsweb itself is originally from http://www.idaemons.org/~knu/cvsweb/

Minor fix; solves a potential security problem by ensuring backend will execute no code if called directly.

Note: I edited out the tables created by the event system. We should
probably have a script that does this for us.

event system.