Delete chat2 as requested by Randal.

Subject: Re: perlfaq8 coyness
Message-ID: <m166sfl0r9.fsf@halfdome.holdit.com>

p4raw-id: //depot/perl@6555

2 files changed, 0 insertions, 380 deletions

diff --git a/MANIFEST b/MANIFEST
index add778700d..5dbb1b2242 100644
--- a/MANIFEST
+++ b/MANIFEST
@@ -700,7 +700,6 @@ lib/bytes.pm		Pragma to enable byte operations
 lib/bytes_heavy.pl	Support routines for byte pragma
 lib/cacheout.pl		Manages output filehandles when you need too many
 lib/charnames.pm	Character names
-lib/chat2.pl            Obsolete ipc library (use Comm.pm etc instead)
 lib/complete.pl		A command completion subroutine
 lib/constant.pm		For "use constant"
 lib/ctime.pl		A ctime workalike
diff --git a/lib/chat2.pl b/lib/chat2.pl
deleted file mode 100644
index 504fa7efd7..0000000000
--- a/lib/chat2.pl
+++ /dev/null
@@ -1,379 +0,0 @@
-# chat.pl: chat with a server
-#
-# This library is no longer being maintained, and is included for backward
-# compatibility with Perl 4 programs which may require it.
-#
-# In particular, this should not be used as an example of modern Perl
-# programming techniques.
-#
-# Suggested alternative: Socket
-#
-# Based on: V2.01.alpha.7 91/06/16
-# Randal L. Schwartz (was <merlyn@stonehenge.com>)
-# multihome additions by A.Macpherson@bnr.co.uk
-# allow for /dev/pts based systems by Joe Doupnik <JRD@CC.USU.EDU>
-
-package chat;
-
-require 'sys/socket.ph';
-
-if( defined( &main'PF_INET ) ){
-	$pf_inet = &main'PF_INET;
-	$sock_stream = &main'SOCK_STREAM;
-	local($name, $aliases, $proto) = getprotobyname( 'tcp' );
-	$tcp_proto = $proto;
-}
-else {
-	# XXX hardwired $PF_INET, $SOCK_STREAM, 'tcp'
-	# but who the heck would change these anyway? (:-)
-	$pf_inet = 2;
-	$sock_stream = 1;
-	$tcp_proto = 6;
-}
-
-
-$sockaddr = 'S n a4 x8';
-chop($thishost = `hostname`);
-
-# *S = symbol for current I/O, gets assigned *chatsymbol....
-$next = "chatsymbol000000"; # next one
-$nextpat = "^chatsymbol"; # patterns that match next++, ++, ++, ++
-
-
-## $handle = &chat'open_port("server.address",$port_number);
-## opens a named or numbered TCP server
-
-sub open_port { ## public
-	local($server, $port) = @_;
-
-	local($serveraddr,$serverproc);
-
-	# We may be multi-homed, start with 0, fixup once connexion is made
-	$thisaddr = "\0\0\0\0" ;
-	$thisproc = pack($sockaddr, 2, 0, $thisaddr);
-
-	*S = ++$next;
-	if ($server =~ /^(\d+)+\.(\d+)\.(\d+)\.(\d+)$/) {
-		$serveraddr = pack('C4', $1, $2, $3, $4);
-	} else {
-		local(@x) = gethostbyname($server);
-		return undef unless @x;
-		$serveraddr = $x[4];
-	}
-	$serverproc = pack($sockaddr, 2, $port, $serveraddr);
-	unless (socket(S, $pf_inet, $sock_stream, $tcp_proto)) {
-		($!) = ($!, close(S)); # close S while saving $!
-		return undef;
-	}
-	unless (bind(S, $thisproc)) {
-		($!) = ($!, close(S)); # close S while saving $!
-		return undef;
-	}
-	unless (connect(S, $serverproc)) {
-		($!) = ($!, close(S)); # close S while saving $!
-		return undef;
-	}
-# We opened with the local address set to ANY, at this stage we know
-# which interface we are using.  This is critical if our machine is
-# multi-homed, with IP forwarding off, so fix-up.
-	local($fam,$lport);
-	($fam,$lport,$thisaddr) = unpack($sockaddr, getsockname(S));
-	$thisproc = pack($sockaddr, 2, 0, $thisaddr);
-# end of post-connect fixup
-	select((select(S), $| = 1)[0]);
-	$next; # return symbol for switcharound
-}
-
-## ($host, $port, $handle) = &chat'open_listen([$port_number]);
-## opens a TCP port on the current machine, ready to be listened to
-## if $port_number is absent or zero, pick a default port number
-## process must be uid 0 to listen to a low port number
-
-sub open_listen { ## public
-
-	*S = ++$next;
-	local($thisport) = shift || 0;
-	local($thisproc_local) = pack($sockaddr, 2, $thisport, $thisaddr);
-	local(*NS) = "__" . time;
-	unless (socket(NS, $pf_inet, $sock_stream, $tcp_proto)) {
-		($!) = ($!, close(NS));
-		return undef;
-	}
-	unless (bind(NS, $thisproc_local)) {
-		($!) = ($!, close(NS));
-		return undef;
-	}
-	unless (listen(NS, 1)) {
-		($!) = ($!, close(NS));
-		return undef;
-	}
-	select((select(NS), $| = 1)[0]);
-	local($family, $port, @myaddr) =
-		unpack("S n C C C C x8", getsockname(NS));
-	$S{"needs_accept"} = *NS; # so expect will open it
-	(@myaddr, $port, $next); # returning this
-}
-
-## $handle = &chat'open_proc("command","arg1","arg2",...);
-## opens a /bin/sh on a pseudo-tty
-
-sub open_proc { ## public
-	local(@cmd) = @_;
-
-	*S = ++$next;
-	local(*TTY) = "__TTY" . time;
-	local($pty,$tty) = &_getpty(S,TTY);
-	die "Cannot find a new pty" unless defined $pty;
-	$pid = fork;
-	die "Cannot fork: $!" unless defined $pid;
-	unless ($pid) {
-		close STDIN; close STDOUT; close STDERR;
-		setpgrp(0,$$);
-		if (open(DEVTTY, "/dev/tty")) {
-		    ioctl(DEVTTY,0x20007471,0);		# XXX s/b &TIOCNOTTY
-		    close DEVTTY;
-		}
-		open(STDIN,"<&TTY");
-		open(STDOUT,">&TTY");
-		open(STDERR,">&STDOUT");
-		die "Oops" unless fileno(STDERR) == 2;	# sanity
-		close(S);
-		exec @cmd;
-		die "Cannot exec @cmd: $!";
-	}
-	close(TTY);
-	$next; # return symbol for switcharound
-}
-
-# $S is the read-ahead buffer
-
-## $return = &chat'expect([$handle,] $timeout_time,
-## 	$pat1, $body1, $pat2, $body2, ... )
-## $handle is from previous &chat'open_*().
-## $timeout_time is the time (either relative to the current time, or
-## absolute, ala time(2)) at which a timeout event occurs.
-## $pat1, $pat2, and so on are regexs which are matched against the input
-## stream.  If a match is found, the entire matched string is consumed,
-## and the corresponding body eval string is evaled.
-##
-## Each pat is a regular-expression (probably enclosed in single-quotes
-## in the invocation).  ^ and $ will work, respecting the current value of $*.
-## If pat is 'TIMEOUT', the body is executed if the timeout is exceeded.
-## If pat is 'EOF', the body is executed if the process exits before
-## the other patterns are seen.
-##
-## Pats are scanned in the order given, so later pats can contain
-## general defaults that won't be examined unless the earlier pats
-## have failed.
-##
-## The result of eval'ing body is returned as the result of
-## the invocation.  Recursive invocations are not thought
-## through, and may work only accidentally. :-)
-##
-## undef is returned if either a timeout or an eof occurs and no
-## corresponding body has been defined.
-## I/O errors of any sort are treated as eof.
-
-$nextsubname = "expectloop000000"; # used for subroutines
-
-sub expect { ## public
-	if ($_[0] =~ /$nextpat/) {
-		*S = shift;
-	}
-	local($endtime) = shift;
-
-	local($timeout,$eof) = (1,1);
-	local($caller) = caller;
-	local($rmask, $nfound, $timeleft, $thisbuf);
-	local($cases, $pattern, $action, $subname);
-	$endtime += time if $endtime < 600_000_000;
-
-	if (defined $S{"needs_accept"}) { # is it a listen socket?
-		local(*NS) = $S{"needs_accept"};
-		delete $S{"needs_accept"};
-		$S{"needs_close"} = *NS;
-		unless(accept(S,NS)) {
-			($!) = ($!, close(S), close(NS));
-			return undef;
-		}
-		select((select(S), $| = 1)[0]);
-	}
-
-	# now see whether we need to create a new sub:
-
-	unless ($subname = $expect_subname{$caller,@_}) {
-		# nope.  make a new one:
-		$expect_subname{$caller,@_} = $subname = $nextsubname++;
-
-		$cases .= <<"EDQ"; # header is funny to make everything elsif's
-sub $subname {
-	LOOP: {
-		if (0) { ; }
-EDQ
-		while (@_) {
-			($pattern,$action) = splice(@_,0,2);
-			if ($pattern =~ /^eof$/i) {
-				$cases .= <<"EDQ";
-		elsif (\$eof) {
-	 		package $caller;
-			$action;
-		}
-EDQ
-				$eof = 0;
-			} elsif ($pattern =~ /^timeout$/i) {
-			$cases .= <<"EDQ";
-		elsif (\$timeout) {
-		 	package $caller;
-			$action;
-		}
-EDQ
-				$timeout = 0;
-			} else {
-				$pattern =~ s#/#\\/#g;
-			$cases .= <<"EDQ";
-		elsif (\$S =~ /$pattern/) {
-			\$S = \$';
-		 	package $caller;
-			$action;
-		}
-EDQ
-			}
-		}
-		$cases .= <<"EDQ" if $eof;
-		elsif (\$eof) {
-			undef;
-		}
-EDQ
-		$cases .= <<"EDQ" if $timeout;
-		elsif (\$timeout) {
-			undef;
-		}
-EDQ
-		$cases .= <<'ESQ';
-		else {
-			$rmask = "";
-			vec($rmask,fileno(S),1) = 1;
-			($nfound, $rmask) =
-		 		select($rmask, undef, undef, $endtime - time);
-			if ($nfound) {
-				$nread = sysread(S, $thisbuf, 1024);
-				if ($nread > 0) {
-					$S .= $thisbuf;
-				} else {
-					$eof++, redo LOOP; # any error is also eof
-				}
-			} else {
-				$timeout++, redo LOOP; # timeout
-			}
-			redo LOOP;
-		}
-	}
-}
-ESQ
-		eval $cases; die "$cases:\n$@" if $@;
-	}
-	$eof = $timeout = 0;
-	do $subname();
-}
-
-## &chat'print([$handle,] @data)
-## $handle is from previous &chat'open().
-## like print $handle @data
-
-sub print { ## public
-	if ($_[0] =~ /$nextpat/) {
-		*S = shift;
-	}
-
-	local $out = join $, , @_;
-	syswrite(S, $out, length $out);
-	if( $chat'debug ){
-		print STDERR "printed:";
-		print STDERR @_;
-	}
-}
-
-## &chat'close([$handle,])
-## $handle is from previous &chat'open().
-## like close $handle
-
-sub close { ## public
-	if ($_[0] =~ /$nextpat/) {
-	 	*S = shift;
-	}
-	close(S);
-	if (defined $S{"needs_close"}) { # is it a listen socket?
-		local(*NS) = $S{"needs_close"};
-		delete $S{"needs_close"};
-		close(NS);
-	}
-}
-
-## @ready_handles = &chat'select($timeout, @handles)
-## select()'s the handles with a timeout value of $timeout seconds.
-## Returns an array of handles that are ready for I/O.
-## Both user handles and chat handles are supported (but beware of
-## stdio's buffering for user handles).
-
-sub select { ## public
-	local($timeout) = shift;
-	local(@handles) = @_;
-	local(%handlename) = ();
-	local(%ready) = ();
-	local($caller) = caller;
-	local($rmask) = "";
-	for (@handles) {
-		if (/$nextpat/o) { # one of ours... see if ready
-			local(*SYM) = $_;
-			if (length($SYM)) {
-				$timeout = 0; # we have a winner
-				$ready{$_}++;
-			}
-			$handlename{fileno($_)} = $_;
-		} else {
-			$handlename{fileno(/'/ ? $_ : "$caller\'$_")} = $_;
-		}
-	}
-	for (sort keys %handlename) {
-		vec($rmask, $_, 1) = 1;
-	}
-	select($rmask, undef, undef, $timeout);
-	for (sort keys %handlename) {
-		$ready{$handlename{$_}}++ if vec($rmask,$_,1);
-	}
-	sort keys %ready;
-}
-
-# ($pty,$tty) = $chat'_getpty(PTY,TTY):
-# internal procedure to get the next available pty.
-# opens pty on handle PTY, and matching tty on handle TTY.
-# returns undef if can't find a pty.
-# Modify "/dev/pty" to "/dev/pts" for Dell Unix v2.2 (aka SVR4.04). Joe Doupnik.
-
-sub _getpty { ## private
-	local($_PTY,$_TTY) = @_;
-	$_PTY =~ s/^([^']+)$/(caller)[$[]."'".$1/e;
-	$_TTY =~ s/^([^']+)$/(caller)[$[]."'".$1/e;
-	local($pty, $tty, $kind);
-	if( -e "/dev/pts000" ){		## mods by Joe Doupnik Dec 1992
-		$kind = "pts";		## SVR4 Streams
-	} else {
-		$kind = "pty";		## BSD Clist stuff
-	}
-	for $bank (112..127) {
-		next unless -e sprintf("/dev/$kind%c0", $bank);
-		for $unit (48..57) {
-			$pty = sprintf("/dev/$kind%c%c", $bank, $unit);
-			open($_PTY,"+>$pty") || next;
-			select((select($_PTY), $| = 1)[0]);
-			($tty = $pty) =~ s/pty/tty/;
-			open($_TTY,"+>$tty") || next;
-			select((select($_TTY), $| = 1)[0]);
-			system "stty nl>$tty";
-			return ($pty,$tty);
-		}
-	}
-	undef;
-}
-
-1;