merged with 4.4Lite

Add RCS indentifiers.

branches: 1.1.1;
Initial revision

Change some standard exit status text to ".Ex -std"
From Eitan Adler in PR bin/47790.

branches: 1.11.6; 1.11.12; 1.11.22;
Fix preamble to match order set out by mdoc(7). Discussed with wiz.

branches: 1.10.42;
Move UCB-licensed code from 4-clause to 3-clause licence.

Patches provided by Joel Baker in PR 22365, verified by myself.

Generate <>& symbolically. I'm avoiding .../dist/... directories for now.

Whitespace cleanup.

For commands and utilities, use EXIT STATUS rather than RETURN VALUES or
DIAGNOSTICS as appropriate (and documented in mdoc(7)).

Add -f option to allow case folding, as in sort(1).
Patch submitted by Andrew Brown <twofsonet@graffiti.com>

WARNSify, fix .Nm usage, getopt returns -1 not EOF

merged with 4.4Lite

Remove cruft from getopt processing (`-' need not be special cased).
Include appropriate header files to bring prototypes into scope.
Use setlocale() to set locale, and strcoll() for comparisions even though
this won't work until full localization support is completed.
Document the fact that comm now conforms to POSIX.2.

Add RCS indentifiers.

branches: 1.1.1;
Initial revision

Use getc instead of fgetc.

This is approximately five times faster for "comm -23 a b" where a and b
are identical 100MB files.

branches: 1.19.2;
static + __dead

Don't include newlines when comparing to prevent errors when lines have
characters that sort lower such as tabs.

This is a temporary fix to allow pullups to existing, supported versions
of NetBSD. I will follow up with a version for current using the new
getline function.

fix -Wcast-qual issues for WARNS=4

branches: 1.16.4; 1.16.6;
Remove the \n and tabs from the __COPYRIGHT() strings.
Tweak to use a consistent format.

branches: 1.15.12; 1.15.28;
Kill __P(), use ANSI function declarations.

Add -f to usage. From Kouichirou Hiratsuka in PR 26196.

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

Patches provided by Joel Baker in PR 22365, verified by myself.

Add -f option to allow case folding, as in sort(1).
Patch submitted by Andrew Brown <twofsonet@graffiti.com>

WARNSify, fix .Nm usage, getopt returns -1 not EOF

Fixed bug I introduced when changing printf comparison vs. EOF. Noted by
andreas@planix.com.

Sync with 4.4lite2

points lost

The return value of printf is less than 0, not necessarily EOF, on failure.

merged with 4.4Lite

Check writes to stdout; if a write fails, comm writes a diagnostic message
to standard error and aborts with a non zero exit value.

#include <unistd.h>, so getopt(), optarg, opterr, optind, and optopt
declarations can be removed from <stdlib.h>.

Remove cruft from getopt processing (`-' need not be special cased).
Include appropriate header files to bring prototypes into scope.
Use setlocale() to set locale, and strcoll() for comparisions even though
this won't work until full localization support is completed.
Document the fact that comm now conforms to POSIX.2.

Add RCS identifiers.

branches: 1.1.1;
Initial revision