freebsd kernel with SKQ
78ce3864de
- Make the child process reaper signal-driven. (Previously, we called reaper() once a second each time we went through the select() loop. This was convenient, but inefficient.) - Increase main select() timeout from 1 second to 60 seconds and use this as the ping timer instead of using timestamps in the _dom_binding structure. This nd the reaper() change noted above makes ypbind a little less CPU-intensive. - Don't flag EINTR's from select() as errors since they will happen as a result of incoming SIGCHLD's interrupting select(). - Prevent possible resource hogging. Currently we malloc() memory each time a user process asks us to establish a binding for a domain, but we never free it. This could lead to serious memory leakage if a 'clever' user did something like ask ypwhich to check the bindings for domains 0.0.0.0.0.0.0.0.0.0 through 9.9.9.9.9.9.9.9.9.9 inclusive. (This would also make a mess out of the /var/yp/binding directory.) We now avoid this silliness by a) limiting the maximum number of simultaneous bindings we can manage to 200, and b) free()ing _dom_binding structures of secondary domains whose servers have stopped responding. We unlink the /var/yp/binding/domain.vers files for the free()ed domains too. (This is safe to do since a client can prod us into reestablishing the binding, at which time we'll simply allocate a new _dom_binding structure for it.) We keep count of the total number of domains. If asked to allocate more than the maximum, we return an error. I have yet to hear of anybody needing 200 simultaneous NIS bindings, so this should be enough. (I chose the number 200 arbitrarily. It can be increased if need be.) - Changed "server not responding"/"server OK" messages to display server IP addresses again since it looks spiffier. - Use daemon() to daemonify ourselves, - Added a SIGTERM handler that removes all binding files and unregisters the ypbind service from the portmapper when a SIGTERM in received. - The comment 'blow away everything in BINDINGDIR' has no associated code. Give it some: clean out /var/yp/binding at startup (if it exists). This completes my ypbind wishlist. Barring bug fixes, I shouldn't need to go poking around in here anymore. (Of course, this means I can start working on my ypserv whishlist now... :) |
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| lib | ||
| libexec | ||
| lkm | ||
| release | ||
| sbin | ||
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| tools/regression/usr.bin/sed | ||
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-----------------------------------------
FreeBSD 2.0 --- ALPHA Release , ,
----------------------------------------- /( )`
\ \___ / |
Welcome to the ALPHA release of FreeBSD 2.0 - the /- _ `-/ '
first public snapshot of our new 4.4BSD Lite based (/\/ \ \ /\
operating system environment. This install proce- / / | ` \
dure is also at the ALPHA stage, and contains only O O ) / |
the minimum functionality required by an `-^--'`< '
*EXPERIENCED* person to install the system. (_.) _ ) /
It is our hope, of course, that the feedback `.___/` /
provided from this snapshot will `-----' /
greatly assist us in making the release <----. __ / __ \
of 2.0 much more user friendly. Your <----|====O)))==) \) /====
comments and criticisms are very <----' `--' `.__,' \
valuable to us, so please don't hesitate | |
in contacting us! Full details on where and \ / /\
how to provide feedback are given below. ______( (_ / \______/
,' ,-----' |
This install procedure is ALPHA code, and `--{__________)
may very possibly *DESTROY* the contents of your
ENTIRE DISK! Please do not proceed with this installation
unless you've adequately backed up your data first!
If any errors occur during this installation, you can see them
by toggling over to the alternate screen - type ALT-F2 to switch
over, ALT-F1 to switch back to the install screen. The debugging
output on the second screen may be very valuable to us in understanding
your bug report, so please be sure to take note of it when reporting
any failures in the installation! Thanks!
Menus and scrolling output windows may be traversed with the arrow
and Page Up/Page Down keys. To suspend the installation at any point,
hit ESC twice. Hitting TAB will move the focus to different controls.
If you've ever dealt with a DOS installation, you'll know how to deal
with this.
For a more complete description of what's new in this release, please
see the release notes.
For more documentation on this system, it is recommended that you purchase
the 4.4BSD Document Set from O'Reilly Associates and the USENIX Association.
ISBN 1-56592-082-1 We have no connection with O'Reilly, we're just
satisfied customers!
Have fun, and please let us know of any problems you encounter with
this release!
Comments should be sent to:
hackers@FreeBSD.org
Bug reports should be sent using the `send-pr' utility, if you
were able to get the system installed, otherwise to:
bugs@FreeBSD.org
And general questions to:
questions@FreeBSD.org
Please have patience if your questions are not answered right away -
this is an especially busy time for us, and our volunteer resources
are often strained to the limit (if not somewhat past!).
Thanks!
The FreeBSD Project