fix various typos, mainly in comments, but also log messages, docs, game text.

Perform line feed after printing usage line.

Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.17.6;
convert __attribute__s to applicable cdefs.h macros

branches: 1.16.10;
- WARNS = 4
- factor out commonly used code.
- constify
- use warn/warnx instead of printf

Add (unsigned char) cast to ctype functions
Some of this code could usefully be converted to use strtoul() and/or
some small helper functions.

plug memory leak. oenbsd-pr-3425

Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22366, verified by myself.

Unifdef __STDC__. Remove __P(). ANSIfy.

Document -w. Patch from Brian Ginsbach in bin/17518.

Don't declare 'extern opt*' getopt variables.

- add timeouts to displayq(), rmremote(), sendfile() and response(),
and use these timeout in the lpq, lpd and lprm programs.

these stop hung remote printers that accept tcp connections but do
not process jobs from hanging the whole system and letting the sysadmin
have a clue about what is going on with this rogue printer.

- add a -r flag to lpd to allow `of' filters for remote jobs.

i know there are ways around this, but i just don't care.

- add a -f flag to lpf to add missing carriage returns.

useful when printing UNIX files to an, eg, LaserWriter that wants CR's
as well as LF's in raw text. stair-stepped text is no fun.

- implement child process accounting: we just have a limit on the number
of children we can have (settable by the sysadmin), and we sleep when
this number is reached. this can reduce malicious not-so-malicious
attacks on the print server by a rogue remote client..

- use setproctitle() where appropriate so the sysadmin has a clue about
what each of the lpd's here are doing.

this was useful to help diagnose a problem (that the above child process
accounting change reduces the lossages of) where a rogue client was
attempting "lpq" operations on one stuck queue in rapid succession,
causing the lpd server to be extremely slow, due to the large number
of lpd processes running.


i have been running these changes in production for about a year.

branches: 1.8.6;
- use an array MAXHOSTNAMELEN+1 size to hold hostnames
- ensure hostname from gethostname() is nul-terminated in all cases
- minor KNF
- use MAXHOSTNAMELEN over various other values/defines
- be safe will buffers that hold hostnames

- WARNS?=1
- be safe with unlinking files (from freebsd)
- remove register
- clean up $NetBSD$'s.
- use inet_ntoa() in one place (from openbsd)
- nul terminate after a bunch of strncpy()'s
- #ifdef __STDC__ rather than #if (from freebsd)
- be safe with a bunch of string operations (from freebsd)
- use warn()/err() over home grown versions (some from freebsd)
- rename warn() to nodaemon() to remove conflict with above
- check errno from failed kill(2) against ESRCH (from freebsd)
- use getopt() rather than home grown versions (from freebsd)
- clean up a bunch of man pages (some from freebsd)
- check for hostname spoof (from freebsd)
- use POSIX wait() interfaces
- use sysconf(_SC_OPEN_MAX) in preference to NOFILE (from freebsd)
- deal with fork() failure
- index/rindex -> strchr/strrchr (some from freebsd)
- add B57600 and B115200 speeds (from freebsd)
- some KNF
- be safe with files passed in over the network (some from freebsd)
- check return value of malloc(), calloc() and strdup()

merge 4.4 lite2

Add RCSIDs

-- convert sgtty to termios. From: Scott Bartram <scottb@iis.net>
-- Use seteuid() to only give lpr, lprm, lpq and lpc root when they
need it from matthew green <mrg@mame.mu.oz.au>

clean up that import. no rcsids yet.

Add RCS identifiers.

branches: 1.1.1;
Initial revision