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1.1 root 1: This directory contains a number of modifications to UUCP that
2: are useful for news. Only the minus.z mod is really crucial,
3: the others are there primarily to boost performance so as to
4: cut down on the load on your machine. There are many other
5: mods to UUCP kicking around - many bug fixes and security improvements.
6: Watch net.bugs.uucp for these. One large mod that is very useful
7: is the Duke uudir mod, which puts files in SPOOL into subdirectories.
8: This mod is very much a kludge, and it certainly could be done
9: better, but until a wonderful version is made available, substantial
10: performance gains can be attained. (Since scanning a UNIX directory
11: is quadratic on the size of the directory, the 5-fold reduction in
12: directory size from uudir can result in a factor of 25 improvement
13: in disk utilization.) uudir is easy to install in any UUCP, but
14: it contains some assembly language code, which has been written
15: only for the VAX and PDP-11. All these changes are transparent to
16: your UUCP neighbors - you can still talk to UUCP's that don't have
17: these mods made - you can even exchange news with older systems.
18: (Batching, with or without the =batch mod, requires at least a 2.10
19: news system on the other end.)
20:
21: Note: All of these changes except the =batch have been installed in
22: version of uucp distributed with 4.3BSD
23:
24: minus.z.5
25: minux.z.v7
26: This mod implements the -z and -n options to uux. These
27: prevent uuxqt from mailing back annoying little messages to
28: whoever happened to start up the uucico daemon telling them
29: that the rnews command executed OK. -z says "only send a message
30: if the rnews command bombed out", -n says "never send one".
31: -z is recommended. In order for your users not to be bombarded
32: with these messages, all your USENET neighbors must install this.
33: "5" is for System V and UNIX 5.0, "v7" is for V7 and 4BSD.
34: cpu.speedup
35: A simple fix to V7 and 4BSD UUCP to keep uicico from eating up
36: all the CPU time on your system when receiving files. Highly
37: recommended, especially if all your traffic is at 2400 baud
38: or slower.
39: uux.minus.c
40: A mod to uux.c to support a uux -c option, e.g.
41: uux -c yoursys!rnews '<' /usr/spool/news/net/news/123
42: which prevents uux from making a separate copy of each article
43: in the spool directory for each system.
44: =batch
45: Code to allow commands such as
46: uux -c yoursys!rnews '<' =/usr/lib/news/batch_/usr/spool/batch/yoursys
47: so that, once the connection is fired up and ready to transfer the
48: file, the command "/usr/lib/news/batch /usr/spool/batch/yoursys"
49: will be started up, and its output copied to the other system.
50: The advantage here is that batching is possible without keeping
51: a full copy of the news on spool waiting for a connection to
52: be established. This can be a big win if the other system is
53: down for any length of time. It does not good without the
54: uux.minus.c mod below. Beware of security issues - they have
55: not been carefully addressed here, and this mod opens up some
56: potential security holes. It only allows one command to
57: be fired up, and batch should check that the file of names
58: is in a safe directory (not /usr/lib/uucp/L.sys or /etc/passwd).
59: Ideally batch should be suid, since the command will run as uucp.
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