⟦d18345f2e⟧

TextFile

/*
 * #include <legal/bs.h>
 >
 > Copyright (c) 1989 Washington University in Saint Louis, Missouri and
 > Chris Myers. All rights reserved.
 >
 > Permission is hereby granted to copy, reproduce, redistribute or
 > otherwise use this software as long as: (1) there is no monetary
 > profit gained specifically from the use or reproduction of this
 > software, (2) it is not sold, rented, traded, or otherwise marketed,
 > (3) the above copyright notice and this paragraph is included
 > prominently in any copy made, and (4) that the name of the University
 > is not used to endorse or promote products derived from this software
 > without the specific prior written permission of the University.
 > THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 > IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 > WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 >
 * newsxd: a daemon for controlling the transmission of news
 *
 * Written by
 * Chris Myers                              Internet: chris@wugate.wustl.edu
 * Software Engineer                            UUCP: ...!uunet!wugate!chris
 * Office of the Network Coordinator              BITNET: chris@wunet.bitnet
 * Washington University in Saint Louis
 *
 * HISTORY:
 * Version 0.1:   first written in perl.  A grand experiment that just didn't
 *                work very reliably (no reflection on the quality of perl, it
 *                just wasn't meant to do this kind of thing).
 *
 * Version 1.0:   first C version
 *
 *         1.1:   added per-host locking
 *         1.2:   added maxload qualifier
 *         1.2.1: added time to live qualifier
 *
 *                SOURCE CODE INADVERTANTLY DESTROYED (SIGH)
 *                Oh well, it needed rewriting anyway. :-)
 *
 * Version 2.0:   here we go again. No per-host locking right now :-(
 *                Removed all static limits on the number of transmission
 *                classes and hosts.  Everything is now malloc'ed.
 *         2.0.1: added penalty time to time-to-live qualifier to allow other
 *                hosts to get news transmitters started.
 *         2.1:   Added the capability to specify a different transmission
 *                program (and parameters) for each transmission class.  This
 *                was the motive for the name change from nntpxd to newsxd.
 *         2.1.1: fixed bug caused by defunct transmitters which finally
 *                overran the ttl (did not do proper cleanup).
 *         2.1.2: added patches for Pyramid and BSD 4.3 support from Warren
 *                Lavallee and Jim Lowe.
 *         2.1.3: fixed bugs in calculating the ttl penalty and start/stop
 *                time ranges
 *         2.1.4: fixed bug in read_config where the loop went 1 past the end
 *                of the options for a transmission class.  This could cause
 *                the last parameter on a longer preceeding class line to be
 *                carried over to the subsequent classes.
 *         2.1.5: somehow the default value for nntplogs slipped away from the
 *                code.  Put it back in where it belongs.
 *         2.1.6: added inter-host startup interval for classes so that newsxd
 *                doesn't start up too many daemons at once
 *         2.1.7: fix stupid bug created in earlier patch where I set argptr[x]
 *                to NULL (what it was supposed to be) and then blithly reset it
 *                to something else -- preventing EXECing the program specified
 *                in an XMIT option.  ARGH.
 *         2.1.8: ARGH! Left out the code to make sure a transmitter for each
 *                host wasn't started up more often than <interval> seconds.
 *         2.2:   Cut down on the size of the wishlist by adding a bunch of
 *                features (and hopefully no more bugs):
 *                - syslog logging
 *                - lots of range/value checking on inputs
 *                - sort host/class names when inserting into list
 *                - move all configuration parameters into newsxd.h
 *                - add more error messages
 *                - document code even more
 *                - allow reconfiguration without killing outstanding xmitters
 *                - add a 'nobatchfile' switch
 *                - allocation of alternate xmitter parameters is now dynamic
 *                - Per-host delta-nice values for transmitters
 *                - make code more readable
 *                - write a manpage
 *         2.3:   Add SIGUSR1, SIGUSR2 to {en,dis}able debugging while running
 *                Shift the order of syslog initialization and switch to daemon
 *                Fix a "go past end of the array sometimes" bug in getclass().
 *                add "reason" to status display to show why xmitter not running
 *                in xmit options, %f=flags,%w=workfile,%b=batchfile,%h=hostname
 *                make transmission of news to hosts 'fair'
 *                minimize a race in run_queue if SIGQUIT causes reconfiguration
 *                change start/stop times to use UUCP-style permissible times
 *         2.3.1: fix bug in incr xmitsernum when only one service class in use
 *                enable fair transmission code even if maxxmits > class members
 *                change use of strpbrk to strchr and make strchr #define'd
 *         2.4:   add per-host flags
 *                added check for multiply-defined host/class in add{host,class}
 *                zero classptr->members in addclass to allow reconfiguration
 *         2.4.1: classptr->members++ in addhost was in the wrong spot
 *                buffer declaration for FAKESYSLOG had trailing ; should be ,
 *                log a reinitialization message after getting SIGHUP
 *                add -v switch to show version and logging
 *                if debugging == ON in daemon mode, don't dump status to stderr
 *                was closing pidfile with close() rather than fclose()
 *                change comments in xmit_done() to show sig==0 is NOHANG
 *                validtime() was mangling the valid times string
 *                parsetime() sometimes said a good time was not valid
 *                addhost() now resorts host list on reconfiguration
 *         2.4.2: modify xmit_done() to almost always use WNOHANG on wait calls
 *                add_host() was improperly decrementing classptr->members
 *                When debugging changes, log "On"/"Off" not the value (0/-1)
 *                get rid of remaining code for obsolete "nntpxmit" keyword
 *                finish updating comments, changing "nntpxmit" to "transmitter"
 *         2.5:   sigsetmask(0) to allow SIGCHLD in xmit_done(); don't lose kids
 *                modify "Why Not Running" messages slightly for readability
 *                xmit_done() now loops to catch all completed transmitters
 *                run_queue() now checks for MIA transmitters and cleans 'em up
 *                if no classes defined, dump_config() now returns immediately
 *                break the source apart into several files from one big'un
 *                class options are default, w/host options overriding
 *                   [ttl, interval, nice, maxload]
 *                run_queue() was setting whynotrunning wrong for active xmits
 *                moved ttl penalty check into "host gave up chance" code to
 *                   prevent a penalized host from blocking others
 *                added SIGIO to idle newsxd until SIGHUP is received
 *                added class slots
 *                added faster pid->host mapping data structure
 *                added SIGTRAP to dump internal data structures for debugging
 *
 * SPECIAL THANKS TO:
 *
 * Alpha tester:  John Coolidge <coolidge@brutus.cs.uiuc.edu>
 *
 * Beta testers:  Warren Lavallee <warren@schizo.samsung.com>
 *                Don Thomson <thomson@macc.wisc.edu>
 *                Michael A. Cooper <mcooper@usc.edu>
 *                Jim Lowe <james@csd4.csd.uwm.edu>
 *                David C. Lawrence <tale@pawl.rpi.edu>
 *                John Coolidge <coolidge@brutus.cs.uiuc.edu>
 *                Lloyd W. Taylor <lloyd@aplcen.apl.jhu.edu>
 *                Dave Alden <alden@shape.mps.ohio-state.edu>
 *                Greg Hackney <root@texbell.sbc.com>
 *                Rick Adams <rick@uunet.uu.net>
 *                Andrew Partan <asp@uunet.uu.net>
 *
 * This software has been tested on the following systems:
 *
 * DECstation 3100, Ultrix 3.1
 * DEC VAX 8810, Ultrix 3.1
 * Sun 3/60, SunOS 4.0.1
 * Sun 3/180, SunOS 4.0.3
 * Pyramid DualPort OSx
 * DEC MicroVAX-II, BSD 4.3 UNIX
 * DEC MicroVAX-II, Mt Xinu MORE/BSD 4.3
 *
 * Wishlist:
 *
 * - add logging of transmitter resource usage
 * - Exponential backoff for failed transmission attempts
 * - Per-host locking, using shlock-style locks
 * - ability to specify min. # of articles queued before xmission starts
 * - add per-class workfile and batchfile definitions
 *
 */
DataMuseum.dk

DKUUG/EUUG Conference tapes

⟦d18345f2e⟧ TextFile

Derivation

TextFile
